Grizzly G4000 manual Feed Rate, Feed rates portion of machine plate

Page 14

Feed Rate

The lever at the bottom of the headstock changes the feed rate, or the number of threads- per-inch. See Figure 9. The lever can be engaged in any of nine different positions. When used in conjunction with the interchangeable gears supplied it is possible to achieve a wide variety of feed or threading rates.

Figure 10. Feed rate selector lever.

The machine plate describes some of the more typical settings which might be used. Figure 11 shows the feed rate portion of the machine plate. Looking at the first column, this means that a feed rate of .0023'' can be achieved by putting the feed lever in position 9 with a 28 tooth gear installed at A, and 80 tooth gears at B and C.

Threading feed rates are described in Figures 12 and 13. An 8 thread per inch feed is the result of having a 60 tooth gear at A, a 30 tooth gear at B, and the lever in position 1.

A metric 2mm pitch requires the lever to be in position 7 and would use the same A and B gears installed above. However the gear between them changes from a 120 tooth to a 127 tooth. Also note that the alignment of gears A and B are off- set so that A now engages the 127 tooth gear and B engages the 120 tooth gear. The shaft for posi- tion B is provided with a spacer which can be installed behind the gear to change its position.

Figure 11. Feed rates portion of machine plate.

Figure 12. Threading rates portion of machine

plate.

A

C

B

Figure 13. Interchangeable gear positions.

G4000 9'' x 19'' Lathe

-13-

Image 14

Contents 19 Metal Lathe Table Of Contents Safety Safety Instructions For Power ToolsAMP Rating Additional Safety Instructions For The Lathe Extension Cords Circuit Requirements110V Operation Grounding Introduction CommentaryUnpacking Piece InventoryClean Up Site ConsiderationsLubrication Assembly & SetupMountingChucks Live Center See FigureSteady Rest Follow RestControls Spindle SpeedsFeed Rate Feed rates portion of machine plateCarriage Controls Longitudinal handwheelThread Dial Lever Tailstock Controls Single tool holderTest Run Adjustments Spindle RPMTop slide gib adjustment Steady/Follow RestChuck Runout Turning new shoulder on back plate G4000 9 x 19 LatheTailstock Making a dead center G4000 9 x 19 LatheTIP Thread Cutting Example of Gear Set-Up to Cut 10 T.P.lMaintenance Bearing Preload Tailstock oiling pointClosure Machine Data Sheet G4000 9 x 19 Lathe Calculating R.P.M.’s G4000 9 x 19 Lathe Headstock Casting G4000 9 x 19 Lathe Bracket Plate G4000 9 x 19 Lathe Stud Bolt G4000 9 x 19 Lathe Bracket G4000 9 x 19 Lathe Housing G4000 9 x 19 Lathe Gear BOX Casting G4000 9 x 19 Lathe G4000 9 x 19 Lathe Apron Casting PK05M G4000 9 x 19 Lathe Saddle G4000 9 x 19 Lathe Compound Slide Tailstock RAM Rest Casting P40001201 BED Warranty and Returns Warranty Card Grizzly INDUSTRIAL, INC