The BSA A7-A10 Forum
Technical (Descriptive Topic Titles - Stay on Topic) => Lucas, Ignition, Charging, Electrical => Topic started by: Rex on 21.04. 2024 18:51
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The little pip which locates the points arm in place to secure the moving contact has jumped out and been lost forever in the workshop. Until I can get another, is there any component/item which could be fitted, modified or substituted instead?
Thanks
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Before I had my lathe I cut and hand-filed one into existance from a random bit of plastic. After my latest ”fling” (a couple of weeks ago) I turned one on my lathe.
Richard L.
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If its any consolation I once spent 2 hours crawling around a garage floor searching for the roller out of a Lucas headlight switch. It was winter I was was leaving in the dark the next morning. Gave up at midnight went indoors and found it embedded in the tread on my shoe sole *pull hair out*.
What does the bit look like, I'm trying to picture it.
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I took a sheet of plastic (1mm thick?) hit it with a centrepunch to produce a pip on the other side, then with a hole punch (centred on the pip) took out a circle.
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Here's what Cheeserbeezer from Priory said a while back ref the 'pip' Rex.
They are small, but there are two sizes depending on the set of points in question, and his is the best way to make them that I have come across. Plastic works too of course - many of the larger ones are made from some form of that.
The purpose of this part is to reduce friction between the clip and the moving arm of the points. It also helps to prevent the points wobbling on the fulcrum pin. It has no electrical insulation requirement. There are two sizes depending on the points you have. I stamp them out of thick fibre using a single hole punch and hammer, then raise the centre by pressing in a centre punch from the back.