Brake Master Cylinder surface finish
Brake Master Cylinder surface finish
(OP)
So I found some roughness inside the cylinder of a brake master cylinder that we are producing in China. I know I cannot accept the roughness, but I am trying to find information on an acceptable surface finish inside of the cylinder. I am having very little luck.
I believe somewhere around Ra 24-32 or 0.6-0.8 micrometers would be acceptable, but I'm hoping to get some opinions from the fine engineers in this forum.
This is for vintage cars so no ABS or other electronic factors, simply the hydraulic cylinder. Thanks for the help!
I believe somewhere around Ra 24-32 or 0.6-0.8 micrometers would be acceptable, but I'm hoping to get some opinions from the fine engineers in this forum.
This is for vintage cars so no ABS or other electronic factors, simply the hydraulic cylinder. Thanks for the help!





RE: Brake Master Cylinder surface finish
RE: Brake Master Cylinder surface finish
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?
RE: Brake Master Cylinder surface finish
RE: Brake Master Cylinder surface finish
Thanks TVP, I was thinking that 0.6-0.8 was the upper limit, I will probably hold them to a higher standard (lower roughness).
Any additional info would be great!
RE: Brake Master Cylinder surface finish
http://pdf
http://www.allorings.com/oring_groove_design.htm
http://www.usseals.com/hydraulic_seals.htm
Note the caveats against too fine a finish.
http://ww
TTFN
FAQ731-376: Eng-Tips.com Forum Policies
RE: Brake Master Cylinder surface finish
RE: Brake Master Cylinder surface finish
In any case, for a safety critical item like a brake cylinder, I would hope you are doing some serious leak testing at extremes of fit and finish and at high and low temperatures. There are too many variables involved to just take a stab in the dark.