RichLeimbach
Mechanical
- Oct 17, 2002
- 88
We currently make a product using a sintered bronze clutch material in a cone clutch arrangement. The material is subjected to a maximum of 3800 fpm relative movement and a maximum pressure of 1500 psi. It runs against a 4140 flywheel machined to a 32 mi finish. Coefficient is around .19. The bronze material is holding up well in this application, however...
We are making a new product that needs to have a maximum relative speed of 8500 fpm and a max pressure of around 3000 psi. Test results are all preliminary so far, but I have some concerns that the large PV jump will be too much for this material to handle. Stability of the friction coefficient is important (needs to be held within +/- 20%).
My question is this... Does anyone have any input on a material that would be good for this application? We have tried most standard organic & semi-metallic materials previously and have found them lacking in frictional stability. I would prefer to use a wrought material (steel, bronze, aluminum, etc.) for their ease of manufacture and mechanical properties, but I am unsure how they would react after a number of cycles (I have some concerns about galling, etc.). If anyone has good ideas, let me know. Thanks. (I'm also posting this to the mechanical engineering forum).
- Rich
We are making a new product that needs to have a maximum relative speed of 8500 fpm and a max pressure of around 3000 psi. Test results are all preliminary so far, but I have some concerns that the large PV jump will be too much for this material to handle. Stability of the friction coefficient is important (needs to be held within +/- 20%).
My question is this... Does anyone have any input on a material that would be good for this application? We have tried most standard organic & semi-metallic materials previously and have found them lacking in frictional stability. I would prefer to use a wrought material (steel, bronze, aluminum, etc.) for their ease of manufacture and mechanical properties, but I am unsure how they would react after a number of cycles (I have some concerns about galling, etc.). If anyone has good ideas, let me know. Thanks. (I'm also posting this to the mechanical engineering forum).
- Rich