Jet BD-920W, Operating Instructions And Parts Manual, Page: 9 / 48

9
Set Up and Preparation for
Operation
To avoid twisting the bed, make sure the location to
which the lathe will be moved is absolutely flat and
level. Place a machinist’s level on the bed ways and
check for level side-to-side and front to rear. If
stand mounted, the stand must be fastened to the
floor. (An optional JET stand is available for this
lathe – order stock no. 321374.)
Remove rust protectant from all surfaces with
kerosene, diesel oil, or a mild solvent. Do not use
gasoline, paint thinner, or lacquer thinner, as these
may damage painted surfaces. After cleaning, wipe
with a clean, dry cloth and cover all machined
surfaces with a light film of machine oil.
Swing open the drive assembly end guard, and
mount the cover to the bottom of the guard using
three screws. (See Drive Assembly Exploded View,
index no. 11, for clarification.)
Carefully read the grounding instructions on pages
4 and 5. It is recommended that the BD920W Lathe
be connected to a dedicated, minimum
25 amp
circuit with a 25 amp circuit breaker or time delay
fuse.
Local codes take precedence over
recommendations.
General Description
Lathe Bed
The Lathe bed is made of high-grade iron. By
combining high cheeks with strong cross ribs, a bed
of low vibration and rigidity is produced. The main
motor is mounted to the rear of the bed (Figure 2).
Headstock
The headstock (Figure 3) is cast from high grade,
low vibration cast iron. It is bolted to the bed with
four screws and uses four adjusting screws for
alignment. In the head the large main spindle is
mounted on two precision taper roller bearings. The
hollow spindle is a Morse taper No.3 with a 7/8”
bore
A quick change of the belt can be accomplished by
easing the tension on the idler (Figure 4).
To protect the machine against accidental damage,
a clutch is fitted to the reduction pulley at the 130
R.P.M. speed.
Figure 2
Figure 3
Figure 4
Headstock