Kinzo 8E116 Motor Bearing Replacement

はじめに

The electric motor shaft is attached to the motor housing with two bearings. During its lifetime, these bearings can wear down, leading to friction and imbalance in the motor shaft.

This guide will show you how to replace these bearings.

必要な工具と部品

手順1 remove the head

Kinzo 8E116 Motor Bearing Replacement, remove the head: 手順 1、 3の画像 1

Kinzo 8E116 Motor Bearing Replacement, remove the head: 手順 1、 3の画像 2

Kinzo 8E116 Motor Bearing Replacement, remove the head: 手順 1、 3の画像 3

Make sure the drill press is turned off and the power cord is unplugged.
Loosen tension set screws (on both sides) and make sure tension pulling handle is pushed left.
With the 4mm hex key, loosen the set screws holding the head in place on the column.
Remove the vertical adjustment handles to prevent them from damaging when removing the head.
Remove the v-band from the pulley.
Pick up the head from the column and lay it on a table with the on/off buttons facing up.

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手順2 disconnect power cable

Kinzo 8E116 Motor Bearing Replacement, disconnect power cable: 手順 2、 3の画像 1

Kinzo 8E116 Motor Bearing Replacement, disconnect power cable: 手順 2、 3の画像 2

Kinzo 8E116 Motor Bearing Replacement, disconnect power cable: 手順 2、 3の画像 3

With the small flathead, remove the screw holding the cover for the motor power cable inlet.
Take off the cap protecting the connectors.
Loosen the screws holding the cable ends in place and remove the cable from the connector housing.
Put the cap back and attach the cover to protect the connector during the rest of this procedure.

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手順3 disconnect motor from mount

Kinzo 8E116 Motor Bearing Replacement, disconnect motor from mount: 手順 3、 3の画像 1

Kinzo 8E116 Motor Bearing Replacement, disconnect motor from mount: 手順 3、 3の画像 2

Kinzo 8E116 Motor Bearing Replacement, disconnect motor from mount: 手順 3、 3の画像 3

Using the 12 and 14 mm wrenches, loosen the mounting bolts.
Turn over the head and loosen the mounting bolts on that side as well.
Place the head with back facing up, remove the bolts and remove the motor from the mount.

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手順4 remove pulley

Kinzo 8E116 Motor Bearing Replacement, remove pulley: 手順 4、 3の画像 1

Kinzo 8E116 Motor Bearing Replacement, remove pulley: 手順 4、 3の画像 2

Kinzo 8E116 Motor Bearing Replacement, remove pulley: 手順 4、 3の画像 3

Remove the set screw from the pulley with the small flathead.
Remove the pulley from the shaft using a pulley removal tool.
The pulley has a diameter of 9 cm at its base.
Make sure the inside of the pulley is free of dirt or particles for easy reassembly.

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手順5 remove fan

Kinzo 8E116 Motor Bearing Replacement, remove fan: 手順 5、 2の画像 1

Kinzo 8E116 Motor Bearing Replacement, remove fan: 手順 5、 2の画像 2

Remove the screws holding the fan cover and remove the cover. A few mallet taps might be needed to encourage the cover.
Use a small crowbar to leverage the fan from the shaft.

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手順6 remove rotor

Kinzo 8E116 Motor Bearing Replacement, remove rotor: 手順 6、 3の画像 1

Kinzo 8E116 Motor Bearing Replacement, remove rotor: 手順 6、 3の画像 2

Kinzo 8E116 Motor Bearing Replacement, remove rotor: 手順 6、 3の画像 3

Unscrew the fan side motor housing bolts.
Use the mallet to tap around the cover edges and get it to loosen.
Once it is loose, the shaft, rotor and housing cover can be pulled from the motor housing.

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手順7 remove fan sided bearing

Kinzo 8E116 Motor Bearing Replacement, remove fan sided bearing: 手順 7、 3の画像 1

Kinzo 8E116 Motor Bearing Replacement, remove fan sided bearing: 手順 7、 3の画像 2

Kinzo 8E116 Motor Bearing Replacement, remove fan sided bearing: 手順 7、 3の画像 3

Carefully tap off the cover from the bearing with the mallet.
Pull the bearing from the shaft using the pulley removal tool.

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手順8 remove pulley sided bearing

Kinzo 8E116 Motor Bearing Replacement, remove pulley sided bearing: 手順 8、 3の画像 1

Kinzo 8E116 Motor Bearing Replacement, remove pulley sided bearing: 手順 8、 3の画像 2

Kinzo 8E116 Motor Bearing Replacement, remove pulley sided bearing: 手順 8、 3の画像 3

The pulley sided bearing is located in the motor housing.
Clamp the bearing from the pulley side with the bearing removal tool, and use the mallet to hit it from its seat.
Clean the bearing seat.

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手順9 replace pulley sided bearing

Kinzo 8E116 Motor Bearing Replacement, replace pulley sided bearing: 手順 9、 3の画像 1

Kinzo 8E116 Motor Bearing Replacement, replace pulley sided bearing: 手順 9、 3の画像 2

Kinzo 8E116 Motor Bearing Replacement, replace pulley sided bearing: 手順 9、 3の画像 3

Before replacement, make sure the shafts, bearing seats, and bearings are clean and lubricated for easy reassembly.
Insert the new bearing into the empty seat in the motor housing.
Use the bearing removal tool to grip the inside.
While centering the bearing, tap the bearing around the outside to press it a little into the seat.
Remove the bearing removal tool, and keep tapping around the outside of the bearing until it is fully in.

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手順10 replace fan sided bearing

Kinzo 8E116 Motor Bearing Replacement, replace fan sided bearing: 手順 10、 2の画像 1

Kinzo 8E116 Motor Bearing Replacement, replace fan sided bearing: 手順 10、 2の画像 2

After cleaning the bearing seat and lubricating the bearing, press it in by hand, or use tapping method from the previous step.
Press the cover containing the bearing on the shaft.

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