On 09/05/2016 16:40, wrote:
On Monday, May 9, 2016 at 7:57:50 AM UTC-4, N_Cook wrote:


That is the 3 motors I've broken into , the original has shim thick
tiny fingers of metal, flexed against the comutator.

AH! that is an OLD Mabuchi-style hobby motor cheap as cheap can be.

Those fingers are spring bronze, very thin and relatively hard to duplicate as the bronze alloy is a delicate balance between being too hard and not having enough spring. Too hard would eat into the commutator, not hard enough would anneal and fail quickly.

http://www.mabuchi-motor.co.jp/en_US/technic/index.html

May be a link to some source for OEM parts.

Peter Wieck
Melrose Park, PA


The metal is not any sort of yellow colour, tin/silvery colour
throughout, so not a plating over bronze of any sort