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Topic: Crankshaft


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In the News (Tue 20 Aug 19)

  
  RPM - crankshaft grinding
When a crankshaft is turned to an undersize, it can and does change the stroke and degrees apart of each rod journal.
Crankshafts that are ground to within +or-.0001 (thats one ten thousands of an inch) on rods and mains gives you a crankshaft that will give you full bearing contact with a lot longer life.
So, as a review, indexing is simply grinding all crankshaft rod journals to be all the same stroke as well as the right degrees apart.
www.rpmrons.com /crankshaft.html   (262 words)

  
  Don Markstein's Toonopedia: Crankshaft
The second, Ed Crankshaft, has survived so far — but that doesn't mean none of his supporting characters have ever had murderous thoughts about him.
Crankshaft stars a curmudgeonly old coot with a heart of gold, that his associates sometimes want to hug but more often want to strangle.
Back then, if anyone had said he had that "heart of gold" they'd have thought that meant it was made of cold metal.
www.toonopedia.com /crank.htm   (486 words)

  
  Crankshaft Balance Factors
Crankshaft balancing is the term commonly used to describe changes made in the “counterweights” of the crankshaft (and other components in some cases) to compensate for the weights of the moving components including the crankshaft and the components attached to it (connecting rods, pistons, etc.).
All crankshafts are balanced at the factory, but not to the same degree as would be required for racing, or even by a careful owner.
Pull acts on the rod and crankshaft assembly in the same way as the actual weight of the reciprocating components themselves, but not at the same time, not continuously, and varying in degree based on the construction and size of the motor and its operating conditions.
victorylibrary.com /mopar/crank-bal-c.htm   (4777 words)

  
  Crankshaft - Wikicars
As the crankshaft undergoes a great deal of sideways load from each cylinder in a multicylinder engine, it must be supported by several such bearings, not just one at each end; this was also a factor in the rise of V8 engines with their shorter crankshafts, in preference to straight-8 engines.
This adds considerably to the weight of the crankshaft; crankshafts from Volkswagen, Porsche, and Corvair flat engines, lacking counterweights, are easily carried around by hand, compared to crankshafts for inline or V engines, which need to be handled and transported as heavy chunks of metal.
Crankshafts can be forged or cast from either mild steel or high strength steel, or machined out of a single billet of forged steel.
wikicars.org /ja/Crankshaft   (895 words)

  
 crankshaft - Search Results - MSN Encarta
Crankshaft, shaft in a reciprocal engine that converts the reciprocating motion of the pistons into rotary motion.
Fifty-five crystal spheres geared to God's crankshaft is my idea of a satisfying universe.
ball bearing, cam, camshaft, cog, cogwheel, coil, crank, crankshaft, cylinder, gasket, gear, gearbox, gearing, lever, oil pan, piston, pump,...
encarta.msn.com /crankshaft.html   (137 words)

  
 Front Crankshaft Seal   (Site not responding. Last check: )
When removing the oil seal, be careful not to damage the crankshaft or the oil pump housing.
Tape the end of a suitable prybar to protect the crankshaft and carefully remove the oil seal.
Be careful not to damage the crankshaft sealing surface.
arrc.epnet.com /autoapp/9307TOY/9307CH03_Front_Crankshaft_Seal.htm   (524 words)

  
 Crankshaft
To provide a reference for crankshaft timing, a slotted timing disk was added to the center of the crankshaft.
To identify the engines crankshaft a casting number was stamped on the front counterweight of the crankshaft.
The cost of hardening a crankshaft using this process is about $200, where most of the cost is concentrated on disposing of the solution once the hardening process has been completed.
users.specdata.com /home/emxjc/crank.html   (1667 words)

  
 Basics Of A Crankshaft - Mustang & Fords Magazine   (Site not responding. Last check: )
This is a typical Ford small-block crankshaft made up of a series of main journals that support the crank in the block and a series of rod journals offset from the main centers.
Arrow 2 indicates the radius or fillet area that transitions the rod or main journal to the cheek of the crankshaft.
Crankshaft lubrication is generally handled by pressure-feeding the main bearings through passages in the main bearing web in the block.
www.mustangandfords.com /howto/29178_choose_crankshaft_411   (1059 words)

  
 Crankshaft Knowledge
Crankshaft strength is also increased with the addition of the counterweight.
Warning: No welded stroker crankshaft beyond 78mm VW rod should ever be used due to the high failure rate of rods, case and blow-by caused by excessive crank flex.
Berg crankshafts are fully forged to journal configuration providing proper grain orientation and are forged from the same chrome alloy steel used in Porsche 911 crankshafts.
www.geneberg.com /crankshaft.htm   (3822 words)

  
 Tips and Tricks for Crankshaft and Rod-Bearing Installation - Tips & Tricks - Circle Track Magazine
Before the crankshaft is put into place, tubular plastic sheaths are positioned over the main-cap studs to prevent any damage caused by accidental stud-to-crankshaft contact.
In this case, the pattern suggests the bearing is too close to the crankshaft radius on one side.
With a dial indicator mounted to the block, the crankshaft endplay measurement is determined.
www.circletrack.com /tipstricks/4636_crankshaft_rod_bearing_installation_tips   (2431 words)

  
 Crankshaft Kits Mazda From RPM Machine
All Crankshaft Kits contain a precision ground crankshaft and a matching set of bearings.The Bearings supplied in your crankshaft kits will be one of 3 brands depending on what your crankshaft is. (domestic or foreign) Most domestic cranks will be supplied with Clevite77 or Federal Mogul engine bearings.
All crankshafts ground in the Sandy Utah Facility have the option of being indexed during the grinding process.
Crankshafts are foam packed to prevent damage during shipment and are coated to prevent any moisture problems.
www.rpmmachine.com /crankshaftkitsmazdamenu.html   (342 words)

  
 Crankshaft Grinding
For this sort of work the crankshaft has to be rotated, this is usually achieved with the engine barring gear.
Overall crankshaft length of 9 Metres with a stroke of 700mm.
Crankshaft chrome plating to a depth of 1mm on radius with Lloyds approval is also offered.
www.onsitemachining.com /crankshaft-grinding.html   (643 words)

  
 Ellwood Group Inc. - Ellwood National Crankshaft   (Site not responding. Last check: )
Ellwood National Crankshaft is a unique manufacturer of new and reconditioned crankshafts for medium speed engines in the 800 to 6000 horsepower range.
ENC regularly produces crankshafts that are approved by ABS, Lloyd's, DNV and other third party inspection entities, and has a quality program focusing on continuous improvement.
Ellwood National Crankshaft Services (ENCS) is a division of ENC and is located in a separate operating facility in Hermitage, Pennsylvania.
www.ellwoodgroup.com /enc.htm   (509 words)

  
 Engine Rebuilding: The Crankshaft
Crankshafts are ground up to.030 undersize in increments of.010.
The last step before lowering the crankshaft in place is to place the rear main seal in the block and the rear main bearing cap.
When the crankshaft is completely torqued down, it should spin freely and easily by hand (unless you are using a rope-style rear main seal which has considerable drag).
www.valvoline.com /carcare/articleviewer.asp?pg=res20010501e2&cccid=5&scccid=5   (800 words)

  
 Crankshaft Torsional Absorbers
The previous page of this section addressed the issue of the torsional excitation which a piston engine applies to whatever device it is driving.
Understand that the resonant frequency of the crankshaft system is different from the resonant frequencies encountered in the PSRU system.
Whatever device is used to absorb crankshaft internal torsional vibrations, it has an effect (usually small) on the excitation produced at the loaded end of the crankshaft around resonance.
www.epi-eng.com /ET-TorsAbsrbrs.htm   (591 words)

  
 Crankshaft   (Site not responding. Last check: )
The crankshaft is the main rotating component of an engine and is commonly made of ductile iron.
The throw is the measurement from the center of the crankshaft to the center of the crankpin journal, which is used to determine the stroke of an engine.
A counterweight is a protruding mass integrally cast into the crankshaft that partially balances the forces of the reciprocating piston and reduces the load on crankshaft bearing journals.
staff.washington.edu /ryanlee/Engine/UofWindsorManual/Crankshaft.htm   (198 words)

  
 Reduce the risk of crankshaft failure   (Site not responding. Last check: )
Crankshaft failure rates are low, however when crankshafts fail the costs in downtime and repairs can be significant.
The SDCM is mounted in the root of the web of the crankshaft to monitor variations in compressor loads, compressor speeds, and measure and record the dynamic strain in the compressor throw through a complete thermal cycle (which may be 24 hours).
Typically, an FE analysis of the crankshaft is completed to determine the peak stress levels based on the measured values at the strain gage location.
www.swri.edu /4org/d18/mechflu/planteng/machvib/crnkshft.htm   (496 words)

  
 Miata Crankshafts
Failures are often precipitated by the removal of the pulley bolt and cam sprocket to facilitate front crankshaft seal replacement.
Your choices are to replace the crankshaft, substitute a nice used engine from a salvage yard, or install a new factory short block.
Also the short nose crankshaft uses the lower timing belt cog as a structural member, that is the cog is bolted to the crankshaft, the accessory pulleys (one v-belt and one serpentine) are bolted to the cog.
www.miata.net /garage/crankshaft.html   (3398 words)

  
 Engine Crankshaft Bearings
But when one or more crankshaft bearings are found to be damaged or show unusual or uneven wear, it typically indicates other problems that need correcting—problems that if left uncorrected may cause the replacement bearings to suffer the same fate.
The straightness of the crankshaft can be checked by placing the crank on V-blocks, positioning a dial indicator on the center journal and watching the indicator as the crank is turned one complete revolution.
Crankshaft bearings generally need at least a.0001 inch thick oil film between themselves and their journals to prevent metal-to-metal contact.
www.aa1car.com /library/ar797.htm   (3127 words)

  
 Crankshaft Repair   (Site not responding. Last check: )
Crankshaft pin turning and shaft straightening are handled on site and in the machine saving down time and costly disassembly.
Crankshaft flanges and flywheel fit refacing are also covered with this service.
All crankshafts are checked for straightness and inspected for cracks before any repairs are started.
www.r-f.com /crank.htm   (156 words)

  
 Crankshaft Pulley Holders
I believe that it is difficult because first, the crankshaft turns in a direction that tends to tighten the bolt.
The reduction in diameter abets the tightening of the crankshaft onto the bolt, perhaps particularly during transients where the pulley pulses against the hot bolt.
One option for freeing the pulley bolt is to use a special tool for fixing the crankshaft pulley in place and then applying the necessary torque to the bolt.
home.earthlink.net /~honda.lioness/id6.html   (1137 words)

  
 Speed of a Piston with an Offset Crankshaft
To derive an answer, I first thought I would represent the rotation of the crank as a circle where the center of the circle would be the axis of the crankshaft and the circumference represents the rotation of the center of the journal.
Since this article is about the offset crankshaft, notice that the center of the circle representing the rotation of the journal is offset from the vertical line which denotes the center of the piston.
The offset of the axis of the crankshaft from the vertical path of the piston
www.wfu.edu /~rollins/piston/offset   (1091 words)

  
 [No title]
In his popular comic strip Crankshaft, cartoonist Tom Batiuk has created a cast of characters so real that fans are compelled to follow their adventures.
A former minor league baseball pitcher, the strip’s namesake, Ed Crankshaft, was deeply disappointed when his major league aspirations fell by the wayside.
Crankshaft amuses comics fans with his no-holds-barred zingers and cantankerous disposition – an obvious outer crust for a school bus driver.
www.kingfeatures.com /features/comics/crank/aboutMaina.php   (256 words)

  
 Crankshaft gear separated from Crankshaft on Lycoming aircraft engine
The engine manufacturer has stated that the design intention is for the rotational loads on the accessory gear to be reacted by torsional friction loads between the gear and the crankshaft generated by the clamping effect of the retaining bolt.
The bolt has a right-hand thread and the crankshaft rotates clockwise as viewed from the rear and thus, in the event of a loss of torsional restraint between the gear and the crankshaft, geartrain loads will tend to unscrew the bolt.
The manufacturer considered that loosening of the gear on the crankshaft had nearly always been caused by a torsional overload on the gear or by inadequate clamping loads applied by the bolt.
www.sacskyranch.com /eng300.htm   (686 words)

  
 Cantilevered crankshaft stirling cycle machine (US6062023)   (Site not responding. Last check: )
The harmonic crank drive linkage has a primary crankshaft and an eccentric crankshaft mounted internally to the primary crankshaft and coupled via a gear set to counterrotate with respect to the primary crankshaft.
The eccentric crankshaft may be cantilevered with respect to the primary shaft, with the pistons of the engine coupled to the eccentric crankshaft externally to the supporting bearings.
iii) an epicyclic gear set disposed distally to the cantilevered end, the epicyclic gear coupling the eccentric crankshaft to the primary crankshaft in such a manner that the eccentric crankshaft is characterized by a forward angular momentum and the primary crankshaft is characterized by a backward angular momentum.
www.delphion.com /details?pn10=US06062023   (590 words)

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