By joining you will help ensure that we can continue to provide this service
JOIN HERE!
crankshaft question/opinions
crankshaft question/opinions
1964 BMW R69S
1968 Triumph T100R road racer
1972 Triumph T150V road racer
2019 BMW S1000R
-
- Posts: 1308
- Joined: Wed Aug 05, 2009 9:06 pm
- Has thanked: 24 times
- Been thanked: 21 times
Re: crankshaft question/opinions
R69S - R60/2 - R67/2 - R51/3 - R69
Re: crankshaft question/opinions
1964 BMW R69S
1968 Triumph T100R road racer
1972 Triumph T150V road racer
2019 BMW S1000R
Re: crankshaft question/opinions
Dave
-
- Posts: 1308
- Joined: Wed Aug 05, 2009 9:06 pm
- Has thanked: 24 times
- Been thanked: 21 times
Re: crankshaft question/opinions
R69S - R60/2 - R67/2 - R51/3 - R69
Re: crankshaft question/opinions
Am looking for other sources for the carrier.
1964 BMW R69S
1968 Triumph T100R road racer
1972 Triumph T150V road racer
2019 BMW S1000R
-
- Posts: 73
- Joined: Fri Oct 27, 2006 3:00 am
- Has thanked: 1 time
- Been thanked: 8 times
Re: crankshaft question/opinions
The Salis BMW Parts rear bushing is a custom made part that Jan markets. The bushing requires the ID to be processed so that it meets the factory interference fit tolerance with the rear main bearing.
The process of reaming the rear bushing seems too tedious, cumbersome and open to causing additional problems (different from just being a slip-fit worn out issue). Reaming a bore that is significantly larger than its length can be quite challenging. Reaming the bushing requires a high end quality mill and the adequate fixturing to secure the engine case.
I process the Salis bushing by honing it to the required interference fit ID spec. I have a system that uses a honing machine, tooling and a fixture such that the required final ID dimension can be held to a tolerance of +/-0.0025mm. The process is relatively quick and gives excellent repeatable results.
Re: crankshaft question/opinions
1964 BMW R69S
1968 Triumph T100R road racer
1972 Triumph T150V road racer
2019 BMW S1000R
-
- Posts: 73
- Joined: Fri Oct 27, 2006 3:00 am
- Has thanked: 1 time
- Been thanked: 8 times
Re: crankshaft question/opinions
As per your friend....'If he can't no one can.'......That is a slight on all the top notch humble machinists and engineers out there that can do it on a daily basis for fun and/or a living. I have learned from those machinists and engineers that every day is a learning day. A dear friend (happens to be an engineer/machinist), whom is in his late 80's, told me his thoughts on his field, 'Strive to do your best every day and on each project, don't consider yourself the best'. I learn something new and interesting from him every time we converse or meet.
With respect to this part being available from several suppliers, it is fantastic that Jan has his own custom version machined and made available. It is ideal being able to purchase this part and custom fit it to the bearing to meet or exceed factory specs.