Jet Tools GH-1440W, GH-1340W Operation, Feed and Thread Selection, Change Gears Replacement

Page 18

Operation

Feed and Thread Selection

1.Reference the feed and thread found on the gear box faceplate tables (A, Fig. 17 & page 22 of manual).

2.Move levers (B, C, D, E & F, Fig. 17) to the appropriate positions according to the chart.

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. 17).

1.Disconnect the machine from the power source (unplug).

2.Open the door on the left end of the headstock.

3.Loosen nuts (A & B, Fig. 18).

4.Move quadrant (C, Fig. 18) out of the way and hold in place temporarily by tightening nut (A & B, Fig. 18).

5.Remove hex socket cap screws (D and/or E, Fig. 18), 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. 18), move quadrant back so teeth mesh on gears, and tighten nuts (A & B, Fig. 18).

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 the machine to the power source.

18

Image 18
Contents GH-1340W/1440W Lathes 321810 6/00Warranty on this product JET offers a one-year limitedPage Headstock Specifications GH-1340W/1440WCapacities GearboxTable of Contents MiscellaneousContents of the Shipping Container Tool Box ContentsUncrating and Clean-Up Chuck Preparation Three Jaw Lubrication Page Coolant Preparation Electrical ConnectionsMake sure the lathe is properly grounded General Description Gear Box TailstockLeadscrew and Feed Rod Steady RestControls Follow RestPage Break-In Procedure Operation Change Gears ReplacementDisconnect the machine from the power source unplug Feed and Thread SelectionPowered Carriage Travel Automatic Feed Operation and Feed ChangesThread Cutting Page Saddle AdjustmentsCompound Rest Cross SlideTailstock Off-Set Tailstock GibsHeadstock Alignment Installing Removable Gap Section Removing Gap SectionBelt Replacement and Adjustment Disconnect machine from the power source unplugAligning Tailstock to Headstock