Needle Roller Bearing Suitable For 11E / 11kg Demolition Hammer in Bosch / Hitachi / Dongcheng / DCK / All Imported 11E Model
Brand : Generic
Item Dimension : ID -21mm ×OD 28mm
Needle roller bearing helps to rotate the rotor in safe and easily to the demolition hammer. In case over load and over speed it may broken
So please read the user manual to avoid that.