01-06-2013, 12:12 PM
Never a problem,
We used them for attaching Chassis Dyno Rollers to their shafts, An added advantage is the ability to "fiddle" with the bore and shaft tolerances to enable the locking ring to lock to one part more strongly than the other, with the dyno rollers we used locking rings at each end of the roller one end locked as per the specifications the other setup in such a way as to lock to the shaft and be able to slip within the bore of the roller, not loose by any stretch, but able to move under about two to five tons of force in a press, this only makes sense when you realise that dyno roller tubes can exceed 120 degrees C in heavy use and when over a length of 8 feet or 2400mm this means a lot of displacement if you lock both ends rigid it can cause all manner of problems from out of balance rollers to fatigued shafts or roller hubs that end up breaking in use.
Allowing movement between the ring and the roller means that the shaft won't be eroded by wear if the movement gets out of hand, and simply tightening the locking ring will take up any wear, also the ring can be easily replaced without needing to press it out from inside the roller bore which would be difficult at best.
To reduce the risk of someone over tightening the movable locking ring we used to stamp the tightening torque onto the ring for future reference, you never know where your custom made machinery might end up, but rest assured if something goes wrong with it they'll find you somehow.
I designed and built an engine dyno system in 2007-8 and when the company closed down in 2009 it was sold on an online Auction and was exported to Poland, where a few months later that company ceased trading, it passed through a number of hands until in 2011 it was sold once again back into the UK, through another online Auction, the final owner managed to track down my mobile phone number to ask some basic questions about setting it up, some proposed modifications and how to use certain functions, while on this occasion it was nice to be tracked down as I ended up consulting to the new owner on a number of occasions which made me a little cash, If something had failed and hurt someone on the other hand I'm sure it wouldn't have been so good to have been contacted by their legal folk. Just shows how careful you need to be when building something that could be dangerous if used wrongly or especially if it could fail catastrophically. so for the price of a few minutes stamping the correct tightening torque directly to the couplings, hubs and anywhere else that information could prevent a failure is good insurance, it doesn't hurt to make sure your device complies with the local safety standards as well.
Best Regards
Rick
We used them for attaching Chassis Dyno Rollers to their shafts, An added advantage is the ability to "fiddle" with the bore and shaft tolerances to enable the locking ring to lock to one part more strongly than the other, with the dyno rollers we used locking rings at each end of the roller one end locked as per the specifications the other setup in such a way as to lock to the shaft and be able to slip within the bore of the roller, not loose by any stretch, but able to move under about two to five tons of force in a press, this only makes sense when you realise that dyno roller tubes can exceed 120 degrees C in heavy use and when over a length of 8 feet or 2400mm this means a lot of displacement if you lock both ends rigid it can cause all manner of problems from out of balance rollers to fatigued shafts or roller hubs that end up breaking in use.
Allowing movement between the ring and the roller means that the shaft won't be eroded by wear if the movement gets out of hand, and simply tightening the locking ring will take up any wear, also the ring can be easily replaced without needing to press it out from inside the roller bore which would be difficult at best.
To reduce the risk of someone over tightening the movable locking ring we used to stamp the tightening torque onto the ring for future reference, you never know where your custom made machinery might end up, but rest assured if something goes wrong with it they'll find you somehow.
I designed and built an engine dyno system in 2007-8 and when the company closed down in 2009 it was sold on an online Auction and was exported to Poland, where a few months later that company ceased trading, it passed through a number of hands until in 2011 it was sold once again back into the UK, through another online Auction, the final owner managed to track down my mobile phone number to ask some basic questions about setting it up, some proposed modifications and how to use certain functions, while on this occasion it was nice to be tracked down as I ended up consulting to the new owner on a number of occasions which made me a little cash, If something had failed and hurt someone on the other hand I'm sure it wouldn't have been so good to have been contacted by their legal folk. Just shows how careful you need to be when building something that could be dangerous if used wrongly or especially if it could fail catastrophically. so for the price of a few minutes stamping the correct tightening torque directly to the couplings, hubs and anywhere else that information could prevent a failure is good insurance, it doesn't hurt to make sure your device complies with the local safety standards as well.
Best Regards
Rick
Whatever it is, do it today, Tomorrow may not be an option and regret outlasts fatigue.