Ken Chambers
Platinum Subscriber
I'd like to bring up the discussion about brake linings. I used a local full service industrial brake relining facility a number of years ago but, while they did a superb job of bonding new linings to the Amphicar brake shoes, I've always felt that the pedal braking pressure is excessive to effectively stop the car. They arced the shoes to fit the drums and after some break-in period the shoes are now 100 percent contacting the drums. At the time I didn't request any specific type of lining material so they just did what they thought best. I just revisited the shop and they couldn't identify what type of lining was used some eight years ago based on the receipt I showed them. They said the material they use is pretty generic but the guy didn't know much about friction numbers. They did say, however, that they would install a friction material that I purchased elsewhere.
Now, researching choices of lining material, I see different coefficients of friction from which to choose generally ranging from .3 (moderate) to .5 (ultra-high) using the SAE J661 standard. Short of enrolling in an academic course to study that standard, does anyone have experience on what type of friction material is best to use?
Here's a link to one supplier with descriptions of their different friction materials. Some of their material is rigid molded shapes while other material is flexible which I presume is used for drum brake shoes. http://www.knottbrake.com/friction.html
McMaster-Carr also carries friction material ranging from low to high friction in various sheet sizes. The coefficients of friction listed appear to use the same standard. http://www.mcmaster.com/#friction-material/=tjada4
Looking forward to a lively discussion on braking.
Ken Chambers, CA
'64 Red swimmer
Now, researching choices of lining material, I see different coefficients of friction from which to choose generally ranging from .3 (moderate) to .5 (ultra-high) using the SAE J661 standard. Short of enrolling in an academic course to study that standard, does anyone have experience on what type of friction material is best to use?
Here's a link to one supplier with descriptions of their different friction materials. Some of their material is rigid molded shapes while other material is flexible which I presume is used for drum brake shoes. http://www.knottbrake.com/friction.html
McMaster-Carr also carries friction material ranging from low to high friction in various sheet sizes. The coefficients of friction listed appear to use the same standard. http://www.mcmaster.com/#friction-material/=tjada4
Looking forward to a lively discussion on braking.
Ken Chambers, CA
'64 Red swimmer