16PM-1440BV v3 2020-10 Copyright © 2020 Quality Machine Tools, LLC
of the bed ways at the join (a visible parting line may be ac-
ceptable, but a discontinuity that snags the saddle is not). If a
satisfactory join cannot be achieved, it may be necessary to
remove and reinstall the insert from scratch.
Figure 3-19 Gap insert
Representative
insert
COOLANT SYSTEM
The coolant system is typically used with water-miscible
(emulsied) cutting uid. It can also be used with lightweight
neat cutting oil straight from the can. Synthetic cutting uids
are not recommended due to their potential for corrosion and
other undesirable eects on the lathe and the coolant pump.
If you use water-miscible cutting uid, 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 re-
place with a fresh batch when the old one becomes unusable
due to reduced performance, oil/water separation, or bad odor.
Disposal of used cutting uid can be a problem. It is about 95%
water, so its volume can be drastically reduced by evaporation
in an open tank. The residue may then be handled like any
other waste oil.
Figure 3-20 Coolant pump assembly, RH stand cabinet
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