Unibor CMD400, Manual

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Maintenance

Magnetic base 

– before every operation the magnetic base should be checked to make sure that 

the base is flat and there is no damage present. An uneven magnet base will cause the magnet not to 

hold as efficiently and may cause injury to the operator. 

Adjustment of slide and bearing bracket alignment.

An essential requirement of the machine is that the slide can move in a smooth and controlled 

manner, free of lateral movement and vibration.

This situation can be maintained by periodic adjustment of the slide and is accomplished in the 

following manner:

1.

Place the machine in an upright position and, by means of the capstan, raise the slide to its

highest position. Clean the brass gib strips and apply a small amount of light machine oil to the wear

surfaces.

2.

Now lower the slide back to its lowest position. Bring the slide into the center of the dovetail

slide housing and loosen screws thus allowing free movement of the arbor support bracket.

3.

Commencing with the middle screws, gently feed in all the screws until slight resistance is

encountered.

4.

Operate the slide up and down a few times to test the movement and make any further

necessary adjustments. Try to ensure that all the screws are exerting a uniform pressure on the slide

from top to bottom. A perfectly adjusted slide will operate freely up and down without any sideways

movement.

5.

Now raise the slide to its highest position. Slightly undo the arbor bearing bracket and, using

fingers only, tighten the screws.

6.

Place the machine on a steel plate, connect to power supply and switch on the magnet. Start

up the motor. If the arbor is incorrectly aligned, the arbor support bracket will be seen to oscillate.

Make any necessary further adjustments to the bracket to ensure correct alignment of the spindle and

finally tighten the screws using a spanner. Lastly tighten the arbor bearing bracket.

Check machines grease.

The gearbox grease should be checked once a month to ensure all moving components are covered 

to prevent wear. The grease should be changed at least once a year to ensure you gain the best from 

your machine.

Check Armature of the machine.

This should be checked at least once a month to check that there are no visual signs of damage to the 

body or to the commutator. Some signs of wear will be seen on the commutator over a period of time 

but this is normal (this is the part that comes into contact with the brushes) however, if there are any 

signs of abnormal damage the part should be replaced.