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4-5 The Importance and Method of Spindle Balancing Adjustment
1.
A lathe without spindle-balancing adjustment will cause finish to be chattered. As a result,
this will influence the cutting accuracy of work piece and results in poor roundness-accuracy and
have a chattered finish. It is necessary to pay attention to the spindle vibration from time to time
in order to have the best cutting condition of the lathe. Belt, 3-jaw chuck and the accumulative
tolerances of parts on the headstock, all such factors, can make the lathe chatter. To get rid of
those problems, our lathe is especially designed to have balancing blocks mounted on the locking
nut at the rear side of the spindle. The balancing blocks can be properly adjusted according to
different condition. Please refer to following procedure & figure for proper adjustment.
Firstly, set up the spindle speed at 1350 rpm. Put the palm on left hand of the headstock
2.
cover and press the switch by left hand. Then switch on the lathe to make the spindle turn. Move
the balancing block "A & C" left or right by hand feeling until obtaining the best balanced position.
Then also move the balancing block "B" left or right till the best position with the same way.
Adjust repeatedly until your hand feels no vibration.
speed to 2000 rpm or 880 rpm and check the spindle balance in the same way as we did at 1350
rpm. Finally, tighten the set screws- a, a, b, b, c, c, securely on the balancing blocks.
Afterwards, please change the spindle
22
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