Knife grinder motor

The present utility model relates to a knife grinder motor which comprises a motor body, the motor body comprises an end cover and a shaft cover, the diameter of a shaft hole of the middle part of the end cover is 8.5mm, an oil sealing is arranged between the shaft hole and a shaft, the diameter of an inner bore of the shaft sleeve is 8mm, chamfers are arranged on the inner bore and external diameter end parts of the shaft sleeve, the side surface of the shaft sleeve is provided with an M4 fastening screw hole for fixing the shaft and the shaft sleeve, and one end part of the shaft sleeve is provided with an M5 screw thread through hole with the thickness of 5mm. By adopting the above structure, the service life of a bearing is increased three times from the original 1 or 2 months to 6 months, the maintenance time is greatly saved, and the effective working rate of equipment is increased almost 3 percentage points.