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Big End Advise Please
#42
In general, three conditions are required for a fastener to stay fastened. One, there must be sufficient clamping load to prevent relative movement between the joint faces. Two, the clamping load must be greater than the cyclical loading imposed on the fastener by loading or vibration, or whatever. Three, the sum of the underhead and thread friction must be greater than the unscrewing torque generated by the clamping load and helical thread. Satisfy these and the joint will not come undone, and it doesn't matter what sort of washer is used, but spring washers do assist with underhead friction. The boltscience page shows a bolt with inadequate clamping load reacting to a shear force across the joint. It was going to loosen whether or not the washer was there.
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Messages In This Thread
Big End Advise Please - by Mark McKibbin - 31-08-2017, 09:10 AM
RE: Big End Advise Please - by Ruairidh Dunford - 31-08-2017, 09:33 AM
RE: Big End Advise Please - by Robert Leigh - 31-08-2017, 10:42 AM
RE: Big End Advise Please - by Austin in the Shed - 31-08-2017, 12:22 PM
RE: Big End Advise Please - by Ruairidh Dunford - 31-08-2017, 12:39 PM
RE: Big End Advise Please - by Mark McKibbin - 31-08-2017, 01:15 PM
RE: Big End Advise Please - by Ruairidh Dunford - 31-08-2017, 01:51 PM
RE: Big End Advise Please - by Stuart Giles - 31-08-2017, 03:46 PM
RE: Big End Advise Please - by Bob Culver - 31-08-2017, 08:09 PM
RE: Big End Advise Please - by Hedd Jones - 31-08-2017, 08:31 PM
RE: Big End Advise Please - by Ruairidh Dunford - 31-08-2017, 09:08 PM
RE: Big End Advise Please - by Hedd Jones - 01-09-2017, 09:01 AM
RE: Big End Advise Please - by Robert Leigh - 05-09-2017, 10:32 AM
RE: Big End Advise Please - by Ritchie Wilson - 01-09-2017, 07:28 AM
RE: Big End Advise Please - by Ruairidh Dunford - 01-09-2017, 08:35 AM
RE: Big End Advise Please - by Mark McKibbin - 01-09-2017, 08:57 AM
RE: Big End Advise Please - by Ruairidh Dunford - 01-09-2017, 09:23 AM
RE: Big End Advise Please - by Mark McKibbin - 01-09-2017, 11:06 AM
RE: Big End Advise Please - by Tod - 01-09-2017, 01:39 PM
RE: Big End Advise Please - by Ruairidh Dunford - 01-09-2017, 04:02 PM
RE: Big End Advise Please - by Mark McKibbin - 02-09-2017, 12:06 AM
RE: Big End Advise Please - by Tod - 02-09-2017, 08:24 AM
RE: Big End Advise Please - by Dave Wortley - 02-09-2017, 05:37 PM
RE: Big End Advise Please - by Ruairidh Dunford - 02-09-2017, 05:42 PM
RE: Big End Advise Please - by Dave Wortley - 02-09-2017, 05:57 PM
RE: Big End Advise Please - by Ruairidh Dunford - 02-09-2017, 06:25 PM
RE: Big End Advise Please - by Ian Williams - 02-09-2017, 09:04 PM
RE: Big End Advise Please - by Ruairidh Dunford - 02-09-2017, 10:13 PM
RE: Big End Advise Please - by Ian Sly - 03-09-2017, 10:42 AM
RE: Big End Advise Please - by Steve Jones - 03-09-2017, 11:31 AM
RE: Big End Advise Please - by Ruairidh Dunford - 03-09-2017, 11:27 AM
RE: Big End Advise Please - by Ruairidh Dunford - 03-09-2017, 11:48 AM
RE: Big End Advise Please - by Steve Jones - 03-09-2017, 04:16 PM
RE: Big End Advise Please - by Ian Sly - 03-09-2017, 04:49 PM
RE: Big End Advise Please - by Ruairidh Dunford - 03-09-2017, 05:42 PM
RE: Big End Advise Please - by Alan - 03-09-2017, 07:19 PM
RE: Big End Advise Please - by Dave Wortley - 03-09-2017, 08:39 PM
RE: Big End Advise Please - by Ruairidh Dunford - 03-09-2017, 09:02 PM
RE: Big End Advise Please - by Ruairidh Dunford - 03-09-2017, 09:09 PM
RE: Big End Advise Please - by Ruairidh Dunford - 03-09-2017, 09:17 PM
RE: Big End Advise Please - by Zetomagneto - 03-09-2017, 09:49 PM
RE: Big End Advise Please - by Alan - 03-09-2017, 10:46 PM
RE: Big End Advise Please - by Dave Wortley - 04-09-2017, 09:01 AM
RE: Big End Advise Please - by Hedd_Jones - 04-09-2017, 04:00 PM
RE: Big End Advise Please - by Ruairidh Dunford - 04-09-2017, 07:27 PM
RE: Big End Advise Please - by Colin Reed - 04-09-2017, 08:51 PM
RE: Big End Advise Please - by Ruairidh Dunford - 04-09-2017, 09:03 PM
RE: Big End Advise Please - by Colin Reed - 05-09-2017, 05:32 AM
RE: Big End Advise Please - by Dave Wortley - 04-09-2017, 09:41 PM
RE: Big End Advise Please - by oldswede1947 - 12-08-2019, 02:35 PM
RE: Big End Advise Please - by Mark McKibbin - 14-08-2019, 11:05 AM
RE: Big End Advise Please - by Chris KC - 14-08-2019, 12:00 PM
RE: Big End Advise Please - by Chris Garner - 14-08-2019, 12:25 PM
RE: Big End Advise Please - by Ruairidh Dunford - 14-08-2019, 03:46 PM
RE: Big End Advise Please - by Nick Turley - 14-08-2019, 04:51 PM
RE: Big End Advise Please - by Duncan Grimmond - 14-08-2019, 08:04 PM
RE: Big End Advise Please - by Tony Griffiths - 15-08-2019, 12:40 AM
RE: Big End Advise Please - by Bob Culver - 15-08-2019, 01:40 AM
RE: Big End Advise Please - by Chris KC - 15-08-2019, 07:17 AM
RE: Big End Advise Please - by Colin Reed - 15-08-2019, 10:21 AM

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