Jet GH-26120ZH Operation And Maintenance Instructions Download

Page: 12 / 104

8.0

Installation

1. Finish removing all crate material from around

lathe.

2. Unbolt lathe from shipping pallet.

3. Choose a location for the lathe that is dry and

has sufficient illumination.

4. Allow enough room to service the lathe on all

four sides, and to load and off-load work
pieces. In addition, if bar work is to be
performed, allow enough space for stock to
extend out the headstock end. If used in
production operations, leave enough space for
stacking unfinished and finished parts.

5. The foundation must be solid to support the

weight of the machine and prevent vibration,
preferably a solid concrete floor.

6. The lathe’s center of weight is near the

headstock. Before lifting, move the tailstock
and the carriage

(release carriage lock, section

11.0)

to the right end of the bed and lock them.

7. Sling the lathe using steel rods or pipes of

sufficient strength inserted through the holes in
the stand (see Figure 4).

Do not lift lathe by

the spindle.

With properly rated lifting

equipment, slowly raise the lathe off the
shipping pallet.

Figure 4 – Lifting preparation

Confirm that all suspension

equipment is properly rated and in good
condition for lifting the lathe. Do not allow
anyone beneath or near the load while lifting.

8. The lathe can be placed upon the cast iron

leveling pads under each foot hole, and
adjusted using the adjusting bolts with hex
nuts. Or, it may be secured to the floor
usingboltsplaced head-down in the concrete,
and using shims where needed to level the
machine.

8.1

Leveling the lathe

It is imperative that the lathe be on a level plane;
that is, where headstock and tailstock center points
remain aligned throughout the tailstock travel, with
the bed ways absent of twist and thus parallel to
the operational center line.

A lathe which is not properly leveled will be
inaccurate,

producing tapered cuts. Also, the

center point of the tailstock will vary as it is
positioned along the bed, thus requiring constant
readjustment of the set of the tailstock.

Figure 5 – Leveling

9. Use a machinist’s precision level on the bed

ways both front to back and side to side, as
shown in Figure 5. Take the reading in one
direction every 10 inches. Make sure the ways
are clean and free of any debris before placing
a level upon them.

10. Deviation over bed length

(see Figure 5)

(a) Maximum 0.02/1000mm

(b) Maximum 0.04/1000mm

11. Tighten foot screw nuts evenly to avoid

distortion.

12. Leveling should be inspected occasionally,

and especially if the accuracy of the lathe
beings to diminish.

8.2

Completing installation

13. Exposed metal surfaces have been coated

with a rust protectant. Remove this using a soft
rag and mild commercial solvent or kerosene.
Do not use paint thinner, gasoline, or lacquer
thinner, as these will damage painted
surfaces. Cover all cleaned surfaces with a
light film of ISO68/SAE-20W machine oil, such
as Mobil DTE Oil Heavy Medium.

14.

Open the end gear cover. Clean all
components of the end gear assembly and
coat all gears with a heavy, non-slinging
grease. Close the end gear cover. (Note: A
limit switch prevents the lathe from operating
when the end gear cover is open.)