alternative pitons for Stag brake calipers

[Dieter H. Marschall]

Dear all,

Prof. Matthias Lindner from Mannheim/Germany, who you presumably all know, wrote an article for the German Stag magazine.

As he is very busy and I have loads of time now (I retired two weeks ago), he entitled me to publish the major points of his article in the SOC forum:

Matthias was quite unhappy with the quality of replacement parts, which are on the market. So he did some research and found out that the pistons from brake calipers from some Rover SD1s and from Ford Transits (up to 1991?) are of the same type. The BUDWEG part number he found out is 232141.

Best wishes,
Dieter H. Marschall.

[Klaus Schlueter]

Quality has it's price! Or: the bitterness of a low quality.....

Klaus

http://www.teilesuche24.de/budweg/ko...ssattel-232141#

[new to this]

j wards do stainless steel brake pistons

dave

[73stagman]

j wards do stainless steel brake pistons

dave

So do I . Will get some pictures done when I've machined them.
St/st comes in various grades so I have to work out which is best (EN58 (303?)is a common grade but I think 316 is ok too) then its a simple matter of boring and turning to size! Off cuts of bar are readily available on ebay and if you can do the turning the savings are significant.

Its a shame we only have hollow bar at work ... that doesnt make very good pistons

I already know there will be doubts over accuracy of machining and quality of finished parts but I have no doubts that I can turn four cups to an acceptable standard!
We already do similar work at work to higher tolerances than those required for these parts

[elvimto]

I might give that a try 410 stainless should do the trick, added to my list. Pretty straightforward machine work nothing to fancy good idea.

cheers Stuart

[73stagman]

I found a website that lists the different grades of Stainless steel available (in the UK) both those mentioned (410 and 316) are listed. 410 is a hardenable
(?allowed word?) stainless product for high strength applications and medium corrosion resistant environments. 316 is similar in general terms but is not as hardenable but it is more resistant to corrosion in harsh environments. In the UK where the roads are gritted with salt the 316 is arguably more suitable as the pistons do not necessarily need to be of high strength material

[new to this]

So do I . Will get some pictures done when I've machined them.
St/st comes in various grades so I have to work out which is best (EN58 (303?)is a common grade but I think 316 is ok too) then its a simple matter of boring and turning to size! Off cuts of bar are readily available on ebay and if you can do the turning the savings are significant.

Its a shame we only have hollow bar at work ... that doesnt make very good pistons

I already know there will be doubts over accuracy of machining and quality of finished parts but I have no doubts that I can turn four cups to an acceptable standard!
We already do similar work at work to higher tolerances than those required for these parts

Neil

it looks like all the little bits i need or have trouble finding you come along and make i bet your going to make stainless steel wheel nuts next,i had trouble finding them (minilite style)

dave

[73stagman]

nope!
My new wheels will come with nuts... but they wont be stainless steel. Because they would need to be high strength st/st which is harder to come by in hex bar form and so too expensive. We have just taken delivery of a new dividing head so I could machine hex bar from round bar though.....hmmmm now I'm thinking????

[new to this]

nope!
My new wheels will come with nuts... but they wont be stainless steel. Because they would need to be high strength st/st which is harder to come by in hex bar form and so too expensive. We have just taken delivery of a new dividing head so I could machine hex bar from round bar though.....hmmmm now I'm thinking????

neil

they sell hex bar in stainless on ebay,i was going to buy some to have wheel nuts made but found some one selling them,i which you lived nearer me theres so much you could make for me

dave

[73stagman]

I'm lucky because work sees it all as "honing my machining skills"
I also put in crazy hours (currently 12 hours a day 7 days a week!) they do pay me overtime but I dont HAVE to do it and they know that so they keep us all sweet.
As long as we dont let it all get in real works way! LOL

[73stagman]

Ive seen the hex bar on ebay tonight funnily enough after my earlier posts!