Conversion To 460 Volt Operation; General Description; Lathe Bed; Headstock - Jet GH-1440ZX Operating Instructions Manual

The main motor is rated at 7-1/2 HP (or 10HP
for model 2280ZX), 230/460V and comes from
the factory prewired at 230V. Confirm that power
available at the lathe's location is the same
rating as the lathe.
Power is connected properly when rotating the
forward-reverse knob (E, Figure 12) to the left
position causes the spindle to rotate
counterclockwise as viewed from the tailstock. If
the chuck rotates in the clockwise direction,
disconnect the lathe from the power source,
switch any two of the three power leads (not the
green ground wire), and re-connect the lathe to
the power source.

Conversion to 460 Volt Operation

Disconnect machine from
power source. Failure to do so may cause
serious injury.
Main Motor: Change the wires according to the
diagram on the outside of the motor junction
box.
Figure 9
Transformer: Open electrical panel on rear of
machine on the headstock side. Switch wire
from 230V terminal to 460V terminal as outlined
on the transformer.
Coolant Pump: Open access panel on the base
at the tailstock end. Change wires in coolant
pump junction box according to diagram on the
outside of the junction box cover.
Main Power Switch (A, Figure 9): Turns power
to machine on and off.
Power Source Cable Receiver (B, Figure 9).
Make sure the lathe is properly grounded.

General Description

Lathe Bed

The lathe bed (A, Figure 10) is made of cast iron
Figure 10
with low vibration and high rigidity. Two
precision ground v-slideways, reinforced by
induction hardening and grinding, are an
accurate guide for the carriage and headstock.
The main drive motor is mounted in the stand
below the the headstock.

Headstock

The headstock (B, Figure 10) is cast from high
grade, low vibration cast iron. It is bolted to the
bed by four hex socket cap bolts. In the head,
the spindle is mounted on precision taper roller
bearings.
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