The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - '70 Drum Brakes; when is rebuilding necessary? what should be done to optimize perfor

slikside · 08-02-2011, 01:55 PM

"Turning" refers to machining the surface of the drum that contacts the pad on your brake shoes. To achieve optimum performance, a completely clean, smooth, and uniform surface of the drum is necessary. It takes a metal lathe to do it. But you must have sufficient material left on the drum, so that when turning is complete, you still have a drum within minimum tolerance.

08-02-2011, 01:55 PM	#8
slikside Registered User Join Date: Jun 2010 Location: San Diego Co. Posts: 1,193	Re: '70 Drum Brakes; when is rebuilding necessary? what should be done to optimize pe "Turning" refers to machining the surface of the drum that contacts the pad on your brake shoes. To achieve optimum performance, a completely clean, smooth, and uniform surface of the drum is necessary. It takes a metal lathe to do it. But you must have sufficient material left on the drum, so that when turning is complete, you still have a drum within minimum tolerance.