Stepping Motor Bearing Dust Proof Cover for NEMA17

http://bunkai.sakura.ne.jp/bunkai-wp/3d_printer/607/

NEMA17???????????????????
reprap???????????????????????????????????????????????????????????????????????????????????????
PRN3D?????????????????????????
It is a dust proof cover parts of NEMA17 motors.
It is the motor of the size that is used as a standard on reprap, but the motor that is not sealed to the bearing portion of the shaft back there. To protect such a motor, was produced a dust prevention cover.
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