DeWalt dw421

[David]

My DeWalt DW421 orbital sander pad spins at the same rpm as the motor and becomes almost ballistic and dangerous. It is a useless piece of machinery in this state. I do not believe a "brake" will be able to stop or even slow down this spinning. It would wear out a brake very fast. It is out of warranty, but has not been used often enough to wear the sander out.

[Mark]

Hi David,

The problem is definitely with the dust seal / brake. All random orbital sanders use something similar to it. With all brands it is probably the second most common part that fails right after the sanding pad.

The brake for your DW421 sander the Brake is part #151553-00 and it is available from http://www.ereplacementparts.com.

Good luck with your repair!

-Mark