Re: Successful Packard Hunt

Posted by Owen_Dyneto On 2012/10/12 20:24:55

"Arcing" is a standard part of good drum brake service, and especially important if the drums have ever been turned. When drums are cut the radius of the drum surface becomes larger than the radius of the linings and thus, until such time as enough material has been worn from the linings, only a portion of the lining contacts the drum, so you very inefficient brakes and also very prone of localized overheating of the lining.

"Arcing" is a grinding method that grinds the lining to match the diameter of the drum so that full lining-to-drum contact is obtained from the get-go.