Print Page - 1934 500 Blue Star W34-9 rear brake operating rod wing nut

Title: 1934 500 Blue Star W34-9 rear brake operating rod wing nut
Post by: David Samways on 13 Mar, 2023, 14:28

Does anyone know of a source for a rear brake operating rod wing nut suitable for a 1934 500 Blue Star W34-9? The original part number was 15-7985.

Alternatively, if someone has an original fitted then a photo and some overall dimensions would be appreciated.

Thanks, David

Title: Re: 1934 500 Blue Star W34-9 rear brake operating rod wing nut
Post by: Steve.S on 13 Mar, 2023, 23:25

David, Can't be much help to you on this one, but if you search the internet for Bonhams.com lot 421 L32-5 Blue Star, and can enlarge the photo, I am pretty certain the wing nut is original. Hopefully, this might help you with scale.
Most of the brass wing nuts available seem to have quite small ears, but I think if you search, you will find one that is close to the original. The main problem is the length of the 'body', but maybe you could fabricate a short brass/bronze tube and silver solder it on to the nut? The nut thread would need recutting to 5/16 cycle. I imagine they would have been cadmium plated, but I see the one in the photo is black. It depends on how original you need it to be.

Title: Re: 1934 500 Blue Star W34-9 rear brake operating rod wing nut
Post by: David Samways on 13 Mar, 2023, 23:41

Thanks again Steve. I just made up a stainless steel 5/16" brake rod this evening - it may have originally been 3/8" turned down to 5/16 on the end, but it looks like there's no definitive answer. Yes, I was thinking the same about silver soldering a sleeve to a modern brass wing nut, certainly less effort than making one from scratch.

Title: Re: 1934 500 Blue Star W34-9 rear brake operating rod wing nut
Post by: Bicycle repair man on 14 Mar, 2023, 12:15

Draganfly list the wing nut with that part number

Title: Re: 1934 500 Blue Star W34-9 rear brake operating rod wing nut
Post by: David Samways on 14 Mar, 2023, 12:39

Thanks BRM. If I needed more stuff from Draganfly I'd order a wing nut, but I've decided to make one from scratch - after cogitating on the problem it seemed easier to make one than to modify an existing wing nut.

Title: Re: 1934 500 Blue Star W34-9 rear brake operating rod wing nut
Post by: Sabre on 06 Apr, 2023, 17:12

Here is a pic of wing nut on my 1934 350cc Blue Star.
The round bar is 7/8" in length and 1/2" diameter the wing nut wings are 1 1/2" wide tip to tip.
Total length 1".

Title: Re: 1934 500 Blue Star W34-9 rear brake operating rod wing nut
Post by: David Samways on 06 Apr, 2023, 17:36

Many thanks for the photo. I'm pleased to say that the one I made matches pretty well.

David

Title: Re: 1934 500 Blue Star W34-9 rear brake operating rod wing nut
Post by: Sabre on 07 Apr, 2023, 10:31

Yes looks good to me.

Title: Re: 1934 500 Blue Star W34-9 rear brake operating rod wing nut
Post by: Mark Cook on 31 Oct, 2024, 11:39

There will be some in stock at Performance engineering Services Ltd. By the end of the year.

Mark

Title: Re: 1934 500 Blue Star W34-9 rear brake operating rod wing nut
Post by: Mark Cook on 17 Dec, 2024, 17:54

I have the castings now.

Mark

Title: Re: 1934 500 Blue Star W34-9 rear brake operating rod wing nut
Post by: Mark Cook on 08 Apr, 2025, 13:20

I forgot to add a picture.

https://pesltd.uk/?product=15-7985

Mark

BSA Owners' Club Workshop Discussions

The BSA Workshop => Pre War => Topic started by: David Samways on 13 Mar, 2023, 14:28