When turning brake drums, what should be used to reduce chatter?

Using a dampening strap when turning brake drums is important for reducing chatter during the machining process. Chatter can occur when the surface of the drum is not perfectly balanced or when vibrations are transmitted through the machinery, leading to uneven wear and poor brake performance. The dampening strap works by stabilizing the drum and absorbing vibrations, allowing for a smoother, more consistent finish on the braking surface.

In contrast, a special brake drum tool is designed for precision machining but does not specifically address vibration issues; high friction brake cleaner is utilized for cleaning surfaces rather than for machining stability; and lubricant spray is typically used to reduce friction in mechanical components but does not directly contribute to minimizing chatter during the turning operation. Therefore, the use of a dampening strap stands out as the most effective option for achieving a quality finish on brake drums while mitigating unwanted vibrations.