BSA Owners' Club Workshop Discussions

The BSA Workshop => Singles => Topic started by: Warden on 20 May, 2020, 21:27

Title: C15 Crankshaft and conrod
Post by: Warden on 20 May, 2020, 21:27
Looking to pick some of you clever guys brains
I was hoping to shortly start building up my 1960 C15 engine. Hit a problem removing the sludge trap on the flywheel and fear I have damaged it badly. The picture is not great but there are still parts of the original bolt in the thread and other parts of the thread may be damaged. This caused me to look more carefully at the flywheels and conrod. The conrod appears to be a 40-48 but the flywheels are steel. According to Rupert Ratio - if I am reading the book correctly this combination should not exist.
Am I correct and will it work when rebuilt - if it can be rebuilt after my sludge trap disaster. Any thoughts appreciated
Title: Re: C15 Crankshaft and conrod
Post by: Warden on 23 May, 2020, 10:22
No replies so i decided to bite the bullet and get the needle roller conversion done. Not something I would tackle.
Any suggestions who I send it to?
Title: Re: C15 Crankshaft and conrod
Post by: Blackthou on 23 May, 2020, 22:04
Aren't Aplha Bearings near Birmingham the one's to go to? I believe it's an exchange unit.
Title: Re: C15 Crankshaft and conrod
Post by: Warden on 24 May, 2020, 12:24
I did not know Alpha did   exchange units - I will be on to them first thing Monday
Thanks for that
Title: Re: C15 Crankshaft and conrod
Post by: chaz on 24 May, 2020, 15:47
monday, bank holiday
Title: Re: C15 Crankshaft and conrod
Post by: Warden on 24 May, 2020, 17:34
So it is. Every day has been like a holiday recently. Tuesday it is Thanks for your help
Title: Re: C15 Crankshaft and conrod
Post by: Blackthou on 24 May, 2020, 22:28
I bought my C15 end of Jan 2020. It had an old invoice, among the paperwork, from Alpha Bearings. I rang them up saying the'y had my crank and what was the conversion they'd done and was told that they're exchange cranks. Whether they take yours then do one they've got as an in and out I've no idea. Just wanted to highlight what I was told as opposed to giving the impression they had them on the shelf in case they don't.
Title: Re: C15 Crankshaft and conrod
Post by: Warden on 25 May, 2020, 10:13
Fair enough
Either way would be fine just need to get out of the hole I dug myself into
If I get the needle roller bearings I can kid myself on it was all part of the plan
Thanks again