17
11.2
Feed and thread selection
1. Refer to the feed and thread charts found on
the gear box faceplate (A, Fig. 18 and
sect.
13.0
of this manual).
2. Move levers (B, C, D, E, F, Fig. 18) to the
appropriate positions according to the chart.
11.3
Change gears replacement
The 25T, 127T, 50T gears are installed in the end
gear compartment when delivered from the factory.
This combination will cover most inch feeds and
threads under normal circumstances.
The 30T, 32T, and two 40T gears found in the tool
box are used with different combinations as
indicated on feed and thread tables (A, Fig. 18).
1.
Disconnect machine from power source
(unplug).
2. Open the door on the left end of the
headstock.
3. Loosen nuts (A & B, Fig. 19).
4. Move quadrant (C, Fig. 19) out of the way and
hold in place temporarily by tightening nut (B,
Fig. 19).
5. Remove hex socket cap screws (D and/or E,
Fig. 19), depending on which gear is to be
changed.
6. Install new gear(s) and tighten in place with a
hex socket cap screw.
7. Loosen nut (B, Fig. 19), move quadrant back
so teeth mesh on gears, and tighten nuts (A &
B, Fig. 19).
CAUTION:
Make sure there is a backlash of
.002”-.003” between gears. Setting the gears
too tight will cause excessive noise and wear.
8. Close the door and connect machine to power
source.
11.4
Automatic feed operation and
feed changes
1. Move the forward/reverse selector (A, Fig. 20)
up or down depending on desired direction.
2. Set selector levers (A, B, C, D, Fig. 21) to
desired rate.
Note:
For feeding, lever (D) will be set at "F"
or "D", depending on desired feed rate.
Figure 18
Figure 19
Figure 20
Summary of Contents for GH-1440
Page 23: ...23 14 1 1 Headstock Assembly I Exploded View ...
Page 26: ...26 14 2 1 Headstock Assembly II Exploded View ...
Page 28: ...28 14 3 1 Headstock Assembly III Exploded View ...
Page 30: ...30 14 4 1 Gearbox Assembly I Exploded View ...
Page 33: ...33 14 5 1 Gearbox Assembly II Exploded View D C B ...
Page 36: ...36 14 6 1 Apron Assembly I Exploded View ...
Page 38: ...38 14 7 1 Apron Assembly II Exploded View A D E C B A B C D E ...
Page 40: ...40 14 8 1 Saddle and Cross Slide Assembly Exploded View ...
Page 43: ...43 14 9 1 Top Slide and Tool Post Exploded View ...
Page 45: ...45 14 10 1 Tailstock Assembly Exploded View ...
Page 47: ...47 14 11 1 Bed and Shaft Assembly Exploded View ...
Page 50: ...50 14 12 1 Stand and Brake Assembly Exploded View ...
Page 52: ...52 14 13 1 End Gear Assembly Exploded View ...
Page 56: ...56 14 16 1 Steady Rest Parts List ...
Page 61: ...61 14 20 1 Accessories I Exploded View ...
Page 65: ...65 15 0 Electrical Connections 15 1 Wiring Diagram 1 Phase ...
Page 66: ...66 15 2 Wiring Diagram 3 Phase ...
Page 68: ...68 427 New Sanford Road LaVergne Tennessee 37086 Phone 800 274 6848 www jettools com ...