Tail Stock; Servicing And Maintenance; Lathe Alignment (Part 1); Lathe Alignment (Part 2) - Jet Elite E-1440VS Operating Instructions And Parts Manual

The cross-slide can be power operated by pulling
out the hand knob (A), at one-third feed per
spindle revolution, or it can be hand-operated
using the large-diameter dial graduated in metric
divisions to suit the operating screw and nut fitted.
A
7.9

TAIL STOCK

Can be freed for movement along the bed by
unlocking the clamp lever (A). The tailstock barrel
is locked by lever (B).
The tailstock can be offset for production of
shallow tapers or for re-alignment. Release the
clamping lever (A) and adjust screws (S) at each
side of the base to move tailstock laterally across
the base. An indication of the offset is given by the
datum mark (C) at the tailstock end face, as shown
in Figure 18. Apply clamp lever after adjustment of
set-over.
B
A
S
Fig. 19
Fig. 19
A
B
S
S
Fig. 20
8.1 SERVICING AND
MAINTENANCE
8.2

LATHE ALIGNMENT (PART 1)

With the lathe installed and running, we
recommend a beginning check of the machine
alignment before work. Check leveling and
machine alignment at regular periods to ensure
continued lathe accuracy.
Headstock check: Take a light cut with a sharp tool
over 150 mm length on a 50mm diameter steel bar
gripped in the chuck but not supported at the free
end. Micrometer readings at each end of the
turned length (See Figure 22) should be the same.
To correct a difference in readings, loosen the four
head- stock hold-down screws (J) shown in Figure
21 and adjust the set-over pad (K) beneath the
headstock. Then tighten all screws. After
adjustment, repeat the test-cut/micrometer
reading until micrometer readings are identical so
that machine cutting will be absolutely parallel.
J
K
8.3

LATHE ALIGNMENT (PART 2)

B. Tailstock check
Using a 300 mm ground steel bar fitted between
headstock and tailstock centers, check the
alignment by fitting a dial-test indicator to the
topslide and traversing the center line of the bar.
To correct error, release the tailstock clamp lever
and adjust the two set-over screws provided.
Continue with checking and correction until the
alignment is perfect.
Headstock
Fig. 21
17