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Forum Index > General Discussion > Motorcycle Q&A | |||
Cracking Connecting-Rods |
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Anonymous: Duane | ||||||||
I've rear about certain motorcycle engines having 'cracked' connecting rods. There has been little explanation of what this means, other than one story I found on Internet mention of the connecting rods caps being made by a special cranking process. Any chance somebody could explain? It sounds interesting, but I have no idea what this entails and am eager to learn about it. |
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Flying Squirrel | ||||||||
Not sure about bikes but are you talking about the rods being forged or cast with a "score" line across the big end. The big ends are then broken along the score line. The break is somewhat uneven not like if the big ends were cut with a machine tool. Then when the engine is assembled the "broken" irregular joint lines mate together perfectly. I believe the process is known as precision fracturing. |
Active Member Group Comfort Level:: +5 Registered: 04/23/10 |
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ThaiDesign | ||||||||
Traditionally, connecting rods have been made as one-piece hot-steel forgings with a slightly out-of-round crankpin hole. After cooling the rod was cut in half cross the hole to form the bearing cap, and the mating surfaces of the two resultant pieces were machined to produce a perfectly round plain-bearing-insert mount. |
Active Member Group Comfort Level:: +26 Registered: 09/21/07 |
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Flying Squirrel | ||||||||
Like I said......... |
Active Member Group Comfort Level:: +5 Registered: 04/23/10 |
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ThaiDesign | ||||||||
Quote by: Flying Squirrel
Like I said.........
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Active Member Group Comfort Level:: +26 Registered: 09/21/07 |
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