Propeller shaft runout tolerance. In The Maritime Engineering Reference Book, 2008.
Propeller shaft runout tolerance most PRECISION GROUND SHAFTING Standard Round Bar Tolerances (h = minus, k plus, j = symmetrical) Millstock Stainless Ltd Fusion House, The Crescent Willenhall, West Midlands, WV13 2QR Tel: +44 (0)1902 409409 Fax: +44 (0)1902 409411 sales@millstockstainless. That part of the shaft is probably OK, bending the free end of the shaft would not bend the shaft inside, between the bearings. Thank you Excursion for the shaft and crush A Volvo Penta I/O propeller shaft was bent to 0. Results 1 to 2 of 2 Thread Tools. 5. (. 005” to 0. It dosen't sound like a lot, but it looks like a lot. If you are talking just side Rig up a dial indicator to measure the run out on the tip of prop shaft. It's a dang long trip on the kicker if something goes wrong at the Banana. The length of the shaft in this area is about 30 inches. I found a seller on swap shop that had a good prop shaft. Several methods are used in propeller shaft alignment. 7 oz-in. well, I bent my prop to the point on return, that has been replaced and I now it seems as though the prop shaft has a slight bend as well. 0005. 001: Click here for a more detailed chart for determining propeller shaft size (must use calipers) I'm looking to measure the total runout of a very long shaft along the entire length. Position: Ideal for controlling axis alignment in conjunction with a size tolerance. info/outboard-outdrive-repair/mercury. T. 083 mm/m) of length for general purpose rotating equipment. Can a propshaft be made Measuring and eliminating runout of rotating equipment is an essential part of shaft alignment and machinery maintenance. 5 mm (0. Re: Is this how you measure prop shaft runout?? I gave it a couple of smacks with a rubber mallet and a 2 lb sledge and doesn't move. however testing runout to see if it needs to come apart, anything more than about . Bearings Tolerances: The following are the standards established by the US Navy, according to BuShips plan number 810-1385664: How to Install and Modify a Cutless In this video I cover how to check propeller shafts for "run-out", or if they are bent over specifications. Check for a bent Service and repair help see http://www. and if the prop shaft runout measurements exceed runout tolerance specifications for that prop If I were having the prop shaft pulled and machined I would consider asking for a 5/16" or 3/8" thread down the center of the prop shaft that could be used along with a draw bolt and plate to pull the coupling onto the shaft. Shafts and couplings included in this standard are used for both horizontal and vertical connections between generators and turbines in hydroelectric installations. Circularity (roundness) at each cross-section; Wobble or eccentricity relative to the datum axis; Example: In a rotating shaft, runout can control the roundness of bearing surfaces at specific points, ensuring minimal On rotating machinery, runout is defined as the degree to which a shaft or coupling deviates from true circular rotation. Shaft was out by about . Shaft Like someome had mention earlier I would check runout as close to the end of the prop shaft as possible. JMHO . The boat is used by the local school, so we'd like to avoid headaches and needing service during the (short) If equipped with a CV joint, measure the drive axle pinion input shaft radial runout on the splined surface of the prop shaft rear CV joint housing, as close to the flange as possible: 3. It is crucial that you check your machinery for shaft runout, deflection, and whip regularly. 118 in), the propeller shaft is bent and should be replaced. When I straighten shafts I shoot for 0. 5 8. 15mm per 300mm length, looks like your prop shaft is good! 0. Every shaft or coupling has a center or rotation, or centerline. wthree3. View online or download Volvo penta DPS-A Workshop Manual, Operator's Manual Axial shaft runout is a measurement of the axial displacement of the shaft as it rotates. Saying that, a concern it it, but I can find no guidance as to what tolerance would be acceptable versus a concern deserving of the costly strip and replacement of the shaft. Although some people have thought that checking 250 XS prop shaft runout question? What are the acceptable tollerances for how true the shaft needs to be? The visual inspection with the prop on looks like I bent mine about a 32nd of an inch. The Wärtsilä PCBM system measures data including vibration levels, shaft runout, whirling, and movement on the shaft line components. My eyeball runout check suggested it wasn't too bad. That will be lessened slightly by the 3 The document outlines runout tolerances, shaft and flange concentricity, and axial eccentricity measurements according to IEC 60072. sterndrive. 035 0. It is a common belief that engines and shaft couplings have to be aligned to tolerances of a few thousandths. BTW, T. When a well-balanced shaft and a . 118 but 0. 1. Check for a bent propeller shaft, as follows: a. rodbolt17. Circular run-out provides a 2D control of the circular elements of a Refer toPropeller Shaft Runout Specifications. Mar 6, 2008 1,244 Catalina 1999 C36 MKII #1787 Coyote Point Marina, CA. ; Controls:. The calculator utilizes the following industry accepted formula endorsed by shaft manufacturers, classification societies, and . 0025, but the tip track is still out about . 2. Joined Apr 17, 2002 Messages 70,993. " To rotate the shaft for runout checking, I'd gently turn the uppermost coupling flange by hand, or even better, turn the An easy way to measure a boat prop shaft using only a tape measure, a piece of paper, and a pen. Summing Up Runout is a critical concept in precision machining that affects the quality, functionality, and lifespan of machined parts. The only way to tell for sure is to remove the shaft and put it in a lathe to check the run out. Don, I always use my dial indicator and turn prop shaft slowly to measure BUT, at what point is that 0. 6-15 Horsepower ; Tolerance -. 02” over a length of up to 9m and 0. This is not for prop systems with only 1 U-joint, or with When I fitted the acme 525 the other weekend I checked the shaft with a dial gauge and max runout was 0. and if the prop shaft runout measurements exceed runout tolerance specifications for that prop so in the history of bad boating ideas, how about this. 187 dias. 6 %âãÏÓ 87 0 obj >/Metadata 228 0 R/Outlines 135 0 R/Pages 83 0 R/StructTreeRoot 229 0 R/Type/Catalog>> endobj 228 0 obj >stream application/pdf broadt ORBIT_3-05_spread. 009" tolerance to be taken? Near the threads Prior it was making a bit of a howling sound that increased with engine speed and disappeared when the clutch pedal was depressed (meaning prop shaft speed was zero). Post Cancel. Dec 3, 2014 The prop keys are mass produce so not exactly a quality controlled item. qxd 2005-12-02T08:29:31 QuarkXPressª 4. I used a set of spark plug gap gauges to Least material condition (LMC) Maximum material condition (MMC) material size e. I was thinking about checking runout post-rebuild as you did but ultimately decided to "just send it". 004 is too much run out if it really is true. 030 0. 4. 0625 is 1/16" and you are at nearly . 008. Or, the runout on the 4 flange faces may stack up to create quite a bit of shaft "bow. A Measure the propeller shaft runout. Well . They roll the shaft, pressing it true, and check it on vee blocks until the runout is zero or withing spec. If the runout exceeds 0. I used the proper engineering method and not just "time & patience", so I'm confident it's correct. Accuracy Ground – Has a +/-. Dec 2, 2014 #1 Does anyone know what the max prop shaft runout is on a DP-SM lower unit? Bondo Moderator. In The Maritime Engineering Reference Book, 2008. In addition, An industry standard basic rule-of-thumb shaft straightness tolerance is . 05 mm for the shaft’s outer diameter with respect to a central datum axis. To provide design guidance that results in dimensional interchangeability of marine propeller-shaft couplings within the ISO 1940 G40 (VDI 2060 Q40) for shafts with slight wear ; ISO 1940 G25 (VDI 2060 Q25) for new shafts ; ISO 1940 G16 (VDI 2060 Q16) for special application; To certify that a shaft is within the recognised tolerance we must know the speed required, the weight of the shaft and which of the above grades is required. Split Hub Propeller Shaft Coupling Kit (ZF 63/68 A/IV, Velvet Drive) Split Hub Propeller Shaft Coupling Kit (ZF 220 A/V/IV) Split Hub Propeller Shaft Coupling Kit (ZF 800 80 85 A/IV, ZF 220PL, 280A/IV, 286A/IV, 301, MG506 5061 507) Split Hub Propeller Shaft Coupling Kit (MG 509) All ZF Marine Parts However, in the early 2010’s, Volvo introduced the DPS-B drive which has helical or twisted splines on the prop shaft instead of the straight splines of the DPS-A. PROPELLER SHAFT TSB Revision 25-10 PROPELLER SHAFT DISASSEMBLY AND ASSEMBLY M1251001200249 Required Special Tool: •MD998801: Bearing Remover AC704786 2 1 N 3 4 5 10 9 8 7 N 11N 14 N 13 15 N12 N16 6 17 AB 54 ± 5 N·m Rotate the Shaft and get Runout reading on the dial gage to see if it is within the spec. It provides tables with standard and optional tolerances for different shaft diameters and flange spigot diameters. I was replacing the prop on my BF130a and the prop shaft had visible runout. be/h554hxSDHAs The shaft was . It is a type of misalignment in which the shaft does not rotate The engineering drawing might specify a circular runout tolerance of 0. 2. 001, +. e. Figure 11. 4. Shaft with diameter of 5. 005mm) Question: What the Runout/ID tolerance of the bearing should be? Does it have to less than 0. Usually prop re-pitching companies also offer shaft checking and straightening services - just ask them . That would be for areas of the shaft where the bearings are located. Both of these drives run the same propellers, they just have different splines in the hub. These are circular or total runout. This is not for prop systems with only 1 U-joint, or with only constant velocity (CV) joints, and/or coupler assemblies. Propeller Mount Diameter: While runout is occasionally used for specific applications (e. Measure shaft runout again. If the propeller shaft runout is out of specification, remove the propeller shaft, index the shaft 180°, and re-install the propeller shaft. I knew that it was bent just by looking at it so I got to it. ” Shaft bearings are pipe-like components, the outer shell of which is typically made of brass, or sometimes a fiberglass-like material (the latter is Propeller Shaft Runout Measurement Propeller Shaft Runout Measurement Tools Required * J 7872 Magnetic Base Dial Indicator Set, or equivalent * J 8001 Dial Indicator Set, or equivalent Important: * This measurement procedure is intended to measure propeller shaft runout for prop shaft systems with 2 or 3 U-joints only. A 1" diameter shaft, 5' long, with datums 3" from each end, and a total runout requirement of . 230”so almost a 1/4 inch. 1. 004 runout towards 8. The wide range covers propellers for shaft installations, single-propeller drives, Duoprop drives and saildrives as well as for the revolutionary IPS. "The tolerance at the forward "The tolerance at the forward end of the splines is . If the propeller shaft runout is now within specifications, mark the shaft and yokes for proper orientation. 004", its bent. Standards for Propeller Shafts • ABYC P-6 Propeller Shafting Systems • SAE J755 - 201505 Marine Propeller-Shaft Ends and Hubs . after some online research it seems as though 0. Newer model Bravo & Alpha Gen 2 drives allow a little more room for tolerance vs older drives. 001. 012 total (. Rotate the shaft and it will give you a good visual reference on how much runout there is in the shaft. I was also wondering what the tolerance is for the prop shaft. Propeller Shaft Tolerance Tables Aqualoy 17, 19, 22 and 22HS For New Product Dynamic balancing tests may be required for high rotational speed propellers where significant out-of-balance couples can be exerted on the shafting. Limit: 0. 0035mm Tolerance is . (0. 0118! It must be a typo in the manual since 0. Good Better Best Tobin bronze (naval brass) 316 stainless steel (AINSI/ASTM A240 - 316) (EN 1. The result looked like a bent shaft until I realised Shaft Runout - Mechanical seals ＆ Pumps All machining is performed “in house” on C-N-C turning centers to exacting tolerances and every shaft is inspected for straightness, diameter and out-of-round tolerances per ABYC standards. The shaft runout shall be measured with the indicator stationary with respect to the motor and with its point at the end of the finished surface of the shaft as illustrated in the picture below. You say runout. 003” using the thrust washer as a Another indicator is when shaft feels loose in the bearing. Apr 28, 2024 #2 My opinion, fix it there has been components such as gear shaft, shafts that where ground for bearing journals. Examples of lateral shaft displacement 6. Distortion of the propeller under For instance, burrs or dirt on a flange face could tip the shaft significantly. The on-car measurement procedure of driveshaft runout. Runout tolerances can be state by two tolerance zone. Invest in a quality dial indicator for accurate measurements. C. 024 in) GI MA This measurement procedure is intended to measure propeller shaft runout for prop shaft systems with 2 or 3 U-joints only. GUIDANCE NOTES ON PROPULSION SHAFTING ALIGNMENT . Off-center measurements are called “face runout” in which the flatness and squareness of the surface become contributing factors to the measurement – factors which are not of interest in most applications. This standard applies to the dimensions for all types of shaft couplings and shaft runout tolerances for hydraulic turbines and generators. The knuckle joint in model “B” gearboxes does a good job of protecting the cranks from reasonable shock loads. Using a porta-power I've applied force to the high side of the shaft at increasing shaft deflection values and leaving the force applied for as much as an hour. Pump Shaft Quality – Has an undersized tolerance and straightness tolerance See photo # . If I hit it harder to get it to move I would surely destroy the lower unit. my prop and skeg made contact with what I believe was a boulder/rock and one of my prop blades took the brunt of the contact. • Improper propeller shaft preload 2. Show Printable Version; If you're talking about "Runout"- it's measured on the shaft just before the splines (1. SHOULD be . 001″ (1 mil or thou) should be used. Thread starter Sutric; Start date Apr 28, 2024; Forums. Mount the propeller shaft in wooden V-blocks or between centers on a fixture. 1K views 7 replies 5 participants last post by SonnyThomas Nov 11, 2022. Please post a link to this spec - I am familair with some shafting specs and One of those things is checking coupling and/or shaft runout. The traditional method would be to put the datums on Vee-blocks and roll it then drag the dial indicator up and down the shaft. Thanks for the info, guys. I didnt measure it yet Principle among these is a stack up of tolerances. , what do you consider max prop blade tracking tolerance at the tip? I'm trying to get to the source of my vibes, so I got a prop shop to overhaul my borer. I'm sure the stern (cutlass) bearing only comes in one size and the shaft is supposed to be fit to the stern bearing. . Member. Perfectly acceptable fix. 006 in/ft. In the aerospace industry, it is crucial for components like turbine shafts and propellers, ensuring all points on the entire surface meet the necessary specifications. 001”, should be measured along the full length of the shaft, preferable with the shaft removed from the boat to rule out any variance in the coupler. 002 x 16 x 396 = 12. with very tight balancing requirements. The thrust from the propeller is transferred to the ship through the transmission I have two problems. 2 Shafting and propellers 6. and required balancing. 006. This weekend during a high water run I happened to tag a log just right and bent my prop shaft on my 50 4s merc. J. Did some thread searching (almost easier to search threads on OSO via google). well-balanced rotor are united, the necessary assembly tolerances can permit radial displacement And if I need to get a new prop shaft, is it possible that I can do it myself? (I'm an engineer, and used to be a car mechanic, so have a reasonable idea of whats what) If so, What parts will I need? how much is the shaft bent? lots have a tiny bit of "runout" Comment. Many of the major classification societies have now updated their rules to give clearer guidance for design and testing of shafts, and monitoring needs during ship operation. com www. ohsoslow. I got it straightened back out to about . In calm water, it may be possible to dive to free the prop, but this is dangerous in a seaway and has resulted in numerous fatalities. Not performing the balancing operation on the (impeller + shaft) assembly allows replacement of the impeller later on as erosion and corrosion inevitably takes its toll. 007 on alpha,mr,#1 drives and . NEMA Tolerances For Type P Vertical Solid Shaft Motors (MG 1-18. I put a guage for car rear-ends on the shaft to measure the high spot from the low spot and it has 5 increment movement at the end of the first shaft and 10 at the end of the second shaft and the guage says the increment is . 02 inch) ACX00643. 0005 tolerance on the OD for screw machines and precision. Opinions: What, if any, is an acceptable amount of shaft runout. Or you could also buy a new prop shaft and happy boating again. Clean the surface of the prop shaft rear CV joint I had a prop strike that caused enough damage to the wheel to warrant taking it in for repair, so I decided it would be wise to check the shaft for runout. 375 long each) Each shaft has individual datum callouts (A & B) with a total runout callout of . Join Date: Dec 2010; Posts: 9876; Share Tweet #2. 010 of when it makes contact with the shaft that way when you rotate it and the indicator hits the keyway area it will not have a https://youtu. 11: LaserWriter 8. 0005 to A-B. Outboard Propellers . PROPELLER SHAFT VIBRATION NGPD0003 If vibration is present at high speed, inspect propeller shaft runout first. 038" out of round measured at the end of the prop shaft just before the prop nut threads begin. Max tolerance is . 250 (it doesn't change even if I rotate the prop 90, or 180 degrees on the flange). camshafts, and wheels. 590) AK Dimension - Rabbet Diameter : Face Runout : Permissible Shaft However, post-molding shaft hole drilling may induce minor angular miss-alignment of the propeller with the engine shaft. shaft axis and the propeller reference line see Figure 1. The e. 2006 . 005 on gen 2 alpha. Sep 3, 2016 #5 pull the prop and look at shaft If propeller shaft runout exceeds 0. 3. Measure propeller shaft runout at several points along propel-ler shaft by rotating final drive companion flange with hands. if shaft run out is more than about . 6. 003”. 1 The dimensions and tolerances for propeller shaft ends, propeller hubs, and shaft couplings shall be in accordance with the latest versions of SAE standard J755, Marine Propeller Shaft Ends and Hubs, and J756, Marine Propeller Shaft Couplings, except that keyway fillet radii are mandatory for all sizes of shafting, couplings and hubs. To check shaft straightness, use a dial indicator inside the boat, forward of the I recently aligned my tranny & prop shaft flanges & got it to within . Joined Oct 8, 2014 Messages 43. As equipment becomes more sophisticated with even finer tolerances, Wärtsilä has developed its Portable Condition Based Monitoring (PCBM) system to assess alignment with greater precision. 110 posts · Joined 2021 Add to quote; Only show this user #1 · Nov 10, 2022 (Edited Amazon. 3 and 11. 06-15-2015, 06:39 AM. If runout is severe, it can cause many problems with equipment, such as: Excessive vibration. This section explains the symbols of the geometrical ABS. New bearings have about . the parts inside have to be machinable and they will rust rapidly in water. In This standard applies to the dimensions for all types of shaft couplings and shaft runout tolerances for hydraulic turbines and generators. It's close but I need to check the other side of the limits. This measurement procedure is intended to measure propeller shaft runout for prop shaft systems with 2 or 3 U-joints only. archerynut31 Discussion starter. My crank runout is . Know how your prop shaft is fastened at the engine and prop, and carry spares: a. What determines if a prop shaft is bent on a 250 sho? What is the tolerance on the shaft? Tags: None. If this prop shaft runout; Thread: prop shaft runout. 5-01-01-01 “Model Manufacture Ship Models”. Check the runout of the propeller shaft in multiple locations, including the barrel ends, using the J 7872 . Thanks fellasI . For example, the combination of the clearance of your bearings and the runout of the bearings could make a perfect shaft out of tolerance. Accuracy: Machined in one piece to meet tolerances from 0. The prop suffered pretty major damage and is being sent off to BBlades for rework. One wouldn't want Prop Shaft runout. Drives and Lower Units - Prop shaft run-out - What allowable runout for a standard Bravo prop shaft. I rigged up a dial indicator and it showed . The 30" projection of your runout tolerance gives you many sources for errors. Forums for All Owners. Shaft Runout. 006” per foot of prop shaft length. On two cycle Rotax engines the prop is not hard linked to the crankshaft so crank twisting is usually not an issue in Cat 1-3 events. if the oarts had to much runout even in tolerance the parts could not be balanced. JoeWhite. 003 to 0. Runout tolerances are three-dimensional and apply only to cylindrical parts, especially parts that rotate. Place the indicator within the first . Still consider myself a " Marine Apprentice " after 46 years (learn something new every day). the smallest shaft size together with the largest hole size and I have a query on runout tolerance whether we could use MMC condition to calculate the so-called bonus tolerance for a shaft with a runout tolerance? i. if its bent at the weld line it can crack and fail. I noticeed that my shaft runout (radial measurement by putting a dial indicator perpindicular to the shaft) is . The transmission system on a ship transmits power from the engine to the propeller. Shaft runout, shaft deflection, and shaft whip are issues that can occur in industrial equipment that use rotating shafts. If you can visually see runout in the center drilled portion of the shaft, its junk. Just looked in my Honda service manual and it states the maximum allowable runout on the propeller shaft is 0. 3 illustrates the difference between the two types of tolerance and shows the interpretation of the control carried out by means of a dial indicator; in the case of circular run-out, each circular feature of a surface is controlled independently, while the workpiece rotates around the datum axis. may be eccentric by the full The effects of propeller shaft eccentricity and unbalance have not been thoroughly studied but it is thought that they are generally small. 118 is Re: Prop Shaft Runout Limits the problem with straighnening most larger HP shafts is most are a two part friction welded shaft. If deflection is more than . millstockstainless. 6. Runout limit: 0. 015 over 10 to 18 0. av8erdunn Seaman Apprentice. x . " Weber State University (WSU) - Automotive Technology Department - Transmission Lab. Clean the surface of the prop shaft rear CV joint I'm helping a friend with her 1984 Catalina 30. nauticalloy. 0. runout is a great attribute for high speed rpm shafts. 006" or less runout (Maximum service tolerance of . In addition, propeller strikes also include situations where an aircraft is stationary and a landing gear collapse occurs causing one or more blades to be bent, or where a hangar door (or other object) hits the propeller blade. 01” on taper. Found a few informative threads regarding runout. Purpose try to turn the prop shaft by hand. It is likely you didn't get an accurate reading PRECISION GROUND SHAFTING Standard Round Bar Tolerances (h = minus, k plus, j = symmetrical) Millstock Stainless Ltd Fusion House, The Crescent Willenhall, West Midlands, The tolerance for permissible variation from straightness of a shaft is maximum 0. Some rotary seal applications have a significant amount of lateral shaft displacement that must be properly addressed for satisfactory seal performance. This hole miss-alignment is avoided by use of a tapered reamer to slightly enlarge the propeller hole forward of the aft surface. 5 2020-01-21T11:08:03-08:00 2020-01-21T11:08:03-08:00 Acrobat Distiller 4. 001 in/ft (. If greater than . 016 over 18 to 30 0. unbalance in a 396-lb propeller. and if the prop shaft runout measurements exceed runout tolerance specifications for that prop Arrow shaft tolerances / runout studies. Volvo penta DPS-A Pdf User Manuals. Guidelines for propulsion shaft alignment by the American Bureau of Shipping. Length of driveshaft will make a difference in what will be the most tolerable the shorter the shaft the closer the tolerance, I may run it and see but I am going to guess that you are going to notice the vibration more then the local short track racer. 000" (shafts are built to be straight). A propeller strike can occur at taxi speeds and during touch-and-go operations with propeller tip ground contact. Propeller Shaft Couplings. There is When a new propeller shaft is made how close to the size in question should it be? There must be a tolerance of how much less than the specified size it can be. Much more important is the condition of the prop, as even a slight unbalance will cause the end of the shaft to rotate off-center and vibrate. Any good shop will have prop shafts straighten, rather than replaced. 1" run out is within tolerance. Make an additional check by tracking the propeller at the tip in the same plane, perpendicular to the axis of rotation, to assure that blade track tolerance is within the prescribed limits. If the prop system has a U-joint at the transmission ortransfer case output flange, and if the prop shaft runoutmeasurements exceed runout tolerance specifications for that propshaft at that location, or at the stub shaft if part of the frontshaft, perform the following:Inspect the deflection of the Propeller Shafts. Seal wear. Circular run-out provides a 2D control of the circular elements This free propeller shaft bearing spacing calculator helps you determine the maximum allowable unsupported length between two bearings on a propeller shaft based on shaft diameter, max engine RPM, gear ratio, shaft weight, and modulus of elasticity. Production quality is exceptional with minimized tolerances, ensuring high and reliable performance, year after year. 8 Dec 2015 #12 S. With a prop strike the would be the most logical place it would be bent. Looking for a second opinion. If left Oscillating propeller shaft causing stuffing box clamps to loosen and work free, flooding or sinking the boat. 1 Overview. Ski & Wakeboat Propeller Shaft Nut When a prop shaft is installed at any point in the boat's life, its alignment to its stern tube depends entirely on the position of the strut. After pulling the boat out and inspecting the lower unit, I noticed that my prop shaft has excessive runout. com : Asaki Propeller Shaft 57610-96311 57610-96310 57610-96303 57610-96302 57610-96301 Compatible with Suzuki Outboard 25/30 hp : Sports & Outdoors Marine engines and auxiliary machinery. Tolerance Zone: A two-dimensional circular zone perpendicular to the datum axis within which all measured points of the surface must lie during rotation. iii. Jump to Latest 1. my own engines propshaft is nowhere near as good as yours and mine runs great. The motor is a 2009 Yamaha 50TLR. 003" but I noticed the shaft felt a bit stiff. Measurement of Shaft to Flange Spigot Concentricity Tolerance Measurement of Flange Face to Shaft Runout Dial Gauge 1± RUNOUT TOLERANCES Runout tolerances, shaft and flange concentricity & axial eccentricity are according to IEC 60072 Standard N Optional R (normal) (reduced) mm mm up to 10 0. the surface has been modestly marked and i feel like i should have maybe 10 to 20 thousandths or so machined off of it, but the nominal seal tolerances suggest within 4 thousandths. Categories. It had long been accepted that the integrity of propeller shafts, bearings and seals is critical to both operational reliability and ultimately to ship propulsion security. 6 mm (0. At the moment we are simply placing one shaft in a "V" block and rotating it with an indicator on the opposite shaft. Some customers and agitator suppliers This measurement procedure is intended to measure propeller shaft runout for prop shaft systems with 2 or 3 U-joints only. If equipped with a CV joint, measure the torque tube input flange radial runout on the machined surface of the prop shaft rear CV joint housing, as close to the flange as possible: 3. Last weekend a submerged log jambed between the prop and cavitation plate. Active Users; FAQ; Username: Password: Remember Me? Welcome to BBCBoards. If propeller shaft runout exceeds 0. Raise rear end of vehicle until wheels are clear of the ground. Thanks for the info from the Manual! There are 2 issues: 1. 0715 ± 0. If you can’t, stop trying and work instead on sailing into port or to an anchorage. 4 illustrate the difference between the two types of tolerance and shows the interpretation of the control carried out by means of a dial indicator; in the case of circular run-out, each circular feature of a surface is controlled independently, while the workpiece rotates around the datum axis. 127 mm), a bent propeller shaft is indicated. I did slightly radius the end of mine so it would fit inside of the entire prop key way and the inner curve of the prop shaft groove. In this case the prop shafts should not have over Given that the prop shaft is supported by two roller/needle bearings about 8" apart I suspect there has to be a little movement due to manufacturing tolerances but, how much is too much? Obviously, if it moves too much the seals will not be too happy. 004 I seen this thread with a video and was wondering what the limit is? The video says anything more than . net BBCBoards is the leading online community for Bass Boat connections. g. 015-0. 0 –0. * This measurement procedure is intended to measure propeller shaft runout for prop shaft systems with 2 or 3 U-joints only. 1 The dimensions and tolerances for propeller shaft ends, propeller hubs, and shaft couplings shall be in accordance with the latest versions of SAE standard J755, Marine Normal limit for runout is 0. These two inspections only require a few minutes of your time and a handful of supplies – supplies that any boat owner should have onboard their vessel. tight tolerance. 005". If the runout exceeds the manufacturer's specifications, it suggests a bent propeller shaft. 002" Recommended tolerances for propellers used for propulsion and open water tests are given in ITTC recommended procedure 7. 315 mm depending on the size of the shaft or flange spigot. * When measuring runout of propeller shafts, do not include fluctuations on the dial indicator due Shaft Runout, or shaft eccentricity or radial runout, is a term that refers to the deviation or displacement of a rotating shaft from its true centerline or axis of rotation. If I remember correct prop shaft run out max . That shaft would be way past any tolerance if the prop barrel rubbed the housing. CJR’s dedicated shaft CNC machining centre A shaft that long and thin bends easily, . Joined 27 Nov 2001 Messages 797 Location Dorset next time they told me it was within tolerances, and I took it to a local shop to be bushed. PROPELLER SHAFT RUNOUT Check the deflection of the front, center and rear shafts. take the dial gauge away from the bottom of the engine and keep it for something that calls for it like a crankshaft, never even bother putting it on a prop shaft on a outboard engine. Dual Mercury Master Technician - for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC. 010" clearance between them and the shaft and ple connection between a cylindrical shaft and engines or gearboxes having a lange at the thrust shaft The OKF coupling is available with or without a built-in tool for mounting / dismounting Since the cou-pling is mounted on a cylindrical shaft and not ixed by keyways, it can easily be adjusted axially and rotated to the desired position Re: VOLVO PENTA 280 propeller shaft replacement or straighten most big marine shops have a set of rollers for their hydraulic press. There is not noticeable vibration when Prop shaft tolerance. and if the prop shaft runout measurements exceed runout tolerance specifications for that prop Then that leaves maximum tolerance for shaft runout. 25" portion). 3mm is not 0. 3 mm (0. , pulleys or seal diameters), position and profile remain the go-to tools for controlling tolerances on shafts and round parts. Runout is a condition where the centerline of the coupling or shaft has deviated from its true axis of rotation. Fyi, its a common occurrence for prop hub not being true but that is nothing to worry about. I put on the flange and measured runout using a dial indicator and it was within tolerances, so I left everything These types are readily available or can be made in any type of material; stainless, nickel, carbon, aluminum, plastic, ect Bearing Quality – Has an undersized and smooth finish for the use of Bearings. We have a few interpretations here on how this should correctly be inspected. Join Date: Aug 2011; Posts: 40; Share The Concentricity requires that the median points of the controlled feature, regardless of its size, to be within the tolerance zone. Rotate propeller shaft while observing dial indicator. 040" runout on the smooth part of the shaft between the spline and the threads. " Thus needing the steady bearing "out of the picture. Checked the shaft and have . This measurement is taken at the center of the shaft (on the rotary axis). that are high rpm application. Maximum run out here is . When I put it in reverse it stalled the motor instantly. 012" or 0. At most I would use sand paper to get it fit in the prop and or shaft but you will want it tight enough not to fall off the prop shaft. 005" is the absolute max depending on the motor. TIR, FIM, Total Runout, and Ci There may be some tolerance on these but I have no idea what that might be. The motor is getting rebuilt, the keel stub repaired, and other boat fun. The mission of the American Bureau of Shipping (ABS) is to serve the public interest, as well as the needs This propeller took a major hit and the aluminum fins are bent for sure! In this video we go over the process for checking how-to determine if your propeller Mercury specifies propshaft runout maximum tolerances, based on measurement of the SHAFT, between the case and the SPLINES, with the measurement taken as close to the splines as is possible. Spent yesterday sorting out the prop that had a 1:13 taper, the shaft is 1:12 which is a standard taper. 006 each way). 3 mm can be considered straight. Profile: Perfect for controlling Thinking about it, you probably do not need the one thou accuracy. 05 mm, the shaft would be rejected, and the manufacturing process would need to be adjusted to produce a shaft that meets the tolerance. 0015 runout to the shaft centerline the end would %PDF-1. com Run-out tolerance (run-out deviation) is a geometric tolerance that specifies the run-out fluctuation of a target’s feature when the target (part) is rotated on an axis (specified straight line). Runout refers to the amount of deviation from a true rotational axis. 0035-. 003” replace propeller shaft. Driveshaft runout General Q & A - Propshaft Runout - Back on Labor Day weekend I struck something (due to low water levels). Found the cavation plate broken. SimonD Active member. If the end bearing was perfect and the midmount bearing as installed had . It is made up of shafts, bearings, and finally the propeller itself. 052" (the propeller was noticeably wobbling), and I was able to successfully repair it to a runout of 0. Every machine shop can straighten shafts, but the shaft has to be removed. 009"). This machine shaft alignment video The front cone runout tolerance is excessively large, permitting 0. Any stray from concentricity is considered runout. 125 wich is 1/8. Thats 0. 002 mm? It must have a clearance between the Shaft and Bearing’s ID; does it will affect the measuring result? Figures 11. Hey guys. Foreword . html. jimmbo Joined Jul 23, 2011 Messages 49,885. 05 for Macintosh This video discusses the basics of Measuring GD&T Runout on a Shaft as related on flanges, coupling, or electric motors, etc. There is a sleeve pressed onto the shaft that the seal rides on. The imbalance of the shaft itself due to runout is generally insignificantly small. 001: Taper rate 1:16: Tolerance -. In the case of a higher RPM machine (more than 3600 RPM), a tolerance of 0. The spline end of the drive shaft does go into the crankshaft. Where this becomes an issue is that if you have the newer DPS-B drive you can have the to be honest your test has shown a very very good prop shaft and propeller. Staff member. Dynamic balancing tests may be required for high rotational speed propellers where significant out-of-balance couples can be exerted on the shafting. In virtually all cases, propeller shafts are supported by one — and for longer shafts, sometimes as many as four — bearings, often referred to by their trade name, “cutless bearings. the part outside has to be durable and not rust. 147", so a significant amount and well out of tolerance to just ignore. Is there such a thing as an extra reach seal. 004 or less total indicated runout per 42"" length are maintained. Any shaft support runout issues need to be resolved before proceeding to create the 2020 250 ProXS Prop Shaft Tolerance; Thread: 2020 250 ProXS Prop Shaft Tolerance. With the damage to the prop I assumed there would be prop shaft damage as well. RUNOUT TOLERANCES. Senior Member. • Mean line The mean line is the locus of the midpoints between the upper and lower surface of the Genuine Volvo Penta propellers are designed for their specific task. Electronics / Marine tech service manager Wayne Coll shows Recommended . that being said I have seen a few straightened with decent success. Because of the strut bearing tightness today I though I would check the shaft to motor parallelism so I removed the the flange bolts and slid the log gland up the shaft as far as it would go. Tolerances range from 0. Made it back to the ramp on idle ok. Propeller Shaft Runout Measurement Propeller Shaft Runout Measurement Tools Required * J 7872 Magnetic Base Dial Indicator Set, or equivalent * J 8001 Dial Indicator Set, or equivalent Important: * This measurement procedure is intended to measure propeller shaft runout for prop shaft systems with 2 or 3 U-joints only. (3" from either end), is a deflection of 0. Kahlenberg has a long history of machining marine propeller shafts up to 24 feet long and 6 inch in diameter, Finished machined straightness tolerances of . Foreword. 5. The exposed end was what did the bending in the first place since that's the only point of contact with the prop shaft - that part which is behind the Shaft Runout Measurement: Using a dial indicator or a runout gauge, measure the runout of the propeller shaft. 002" will cause vibrations Quality: Adherence to tightest tolerances on straightness and runout on complete shaft assemblies, and checked for accuracy at every stage in the manufacturing process. If the crankshaft or propeller drive shaft runout does not exceed these limits, install a serviceable propeller. Common Metals Used for Marine Propeller Shafts. 4 For propeller rotational speeds greater than 400 rpm, special consideration will be given to the balancing method, whether it should incorporate dynamic effect and the balance limits. 005 in. In this Mercury Quick Tip video, our friends at Wired2Fish demonstrate how to properly inspect a prop and prop shaft. This is not for prop systems with only 1 U-joint, or with shaft 25 mm* Coupling for shaft 30 mm* Coupling for shaft 35 mm* Coupling for shaft 40 mm* D1 MS10, MS15 21827365 21827366 D2-40 MS10, MS15 21827366 D2-55 / D2-75 MS25 21827366 D2-55 / D2-75 HS25 21820009 21820010 21820011 D3, D4, D6 HS25, HS45, HS63 21820011 * Requiered shaft tolerance: h9 (+0. 4401) (ENS S31600) (SUS 316) F51 Duplex Remanit 4462 The centerline of the driveshaft and the propeller must be aligned with tight tolerance to prevent shaft wear and water leakage through tight shaft seals, reduce fuel consumption, minimize vibration and avoid structural failures. 002". 052) Component guide I'm looking to measure the total runout of a very long shaft along the entire length. Evinrude / Johnson . To get through the Labor day weekend, I heated What is the runout tolerance on a 2b776205 4stroke prop shaft. 008" A note from the manual: "Repairing or straightening the propeller shaft is prop shaft runout? Thread starter av8erdunn; Start date Dec 2, 2014; A. Caliper measurements for radial runout the dial indicator for axial. anzhohkql gxd ihln mzaqkri kpusd liwq qvrcj sorq praqmk mnolxr