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PM-1236 v4 1-2017.indd
Figure 3-30 Follower rest
COOLANT SYSTEM
The coolant system is typically used with water-miscible
(emulsified) cutting fluid. It can also be used with light-
weight neat cutting oil straight from the can. Synthetic
cutting fluids are not recommended due to their potential
Figure 3-32 Gasket on supply line at chip tray
Figure 3-31 Coolant pump assembly, RH stand cabinet
Figure 3-33 Coolant pump connections
for corrosion and other undesirable effects on the lathe
and the coolant pump.
If you use water-miscible cutting fluid, bear in mind that
the ratio of product to water is important — too much
water causes excessive corrosion and other problems.
Check the mix from time to time using a refractometer.
If this is not available, make up a small batch according
to the product directions, then replace with a fresh batch
when the old one becomes unusable due to reduced
performance, oil/water separation, or bad odor.
Disposal of used cutting fluid can be a problem. It is
about 95% water, so its volume can be drastically re-
duced by evaporation in an open tank. The residue may
then be handled like any other waste oil.
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