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Grizzly G0492 owner manual Service, Cross Slide Backlash Adjustment, Gib Adjustments

Models: G0492

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SECTION 7: SERVICE

Cross Slide

Backlash Adjustment

Backlash is the amount of play found in a lead screw. It can be found by turning the cross slide handwheel in one direction, and then turning the handwheel the other direction. When the cross slide begins to move, the backlash has been taken up.

Note: Avoid the temptation to overtighten the cross slide backlash screw. Overtightening will cause excessive wear to the sliding block and lead screw.

Backlash is adjusted by tightening or loosening the screw shown in Figure 54.

Cross Slide

Backlash

Adjustment

Cap Screw

Figure 54. Cross slide backlash adjustment cap

screw.

This screw draws a wedge-type nut against the lead screw and main nut. If you get it too tight, loosen the screw a few turns and tap the cross slide a few times with a rubber or wooden mallet. Then turn the handle slowly back and fourth until the handle turns freely. To readjust the backlash, rock the handle back and fourth and tighten the screw slowly until the backlash is at approximately 0.001" to 0.002" as indicated on the handwheel.

Note: Reducing backlash to less than 0.001" is impractical and reduces the life of the cross slide.

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Gib Adjustments

When adjusting gibs (Figures 55 and 56), keep in mind that the goal is to remove sloppiness in the ways without causing the slides or half nut to bind. Loose gibs will cause a poor finish on the workpiece and wear the slide. Over-tightening will damage the slide, lead screw, and half-nut. The cross slide gib is a tapered piece of iron. When the opposing front and rear gib adjustment screws are turned in opposing directions, the screws force the tapered gibs to fill the void in the way, thus tightening the play in the cross slide. If more play is needed turn the screws the other direction.

For the four saddle gibs, (Figure 55) loosen the jam nuts and turn the three set screws until slight tension felt and the gib plates are slightly pre-load- ed against the underside of the flat-way. Tighten the jam nuts when finished.

Cross Slide Gib Adjustment Point

Saddle Gib Adjustment Points

Figure 55. Gib adjustment points.

Figure 56. Half-nut gib adjustment location.

G0492 12" X 36" Combo Lathe/Mill

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Grizzly G0492 owner manual Service, Cross Slide Backlash Adjustment, Gib Adjustments

Contents

OWNERS MANUAL MODEL G0492 12 X 36 COMBO LATHE/MILLPage Table of Contents SECTION 1 SAFETYSECTION 3 SET UP SECTION 6 MAINTENANCESECTION 7 SERVICE SECTION 8 ACCESSORIESWARRANTY AND RETURNS SECTION 9 PARTSForeword INTRODUCTIONContact Info MACHINE DATA SHEET Machine Data SheetProduct Dimensions Shipping DimensionsOther Specifications FeaturesLathe Information Mill InformationIdentification G0492 12 X 36 Combo Lathe/Mill G0492 12 X 36 Combo Lathe/Mill Additional Safety Instructions for Lathe/Mills Glossary of Terms 220V Single-Phase SECTION 2 CIRCUIT REQUIREMENTSAmperage Draw Circuit RequirementsSECTION 3 SET UP Set Up SafetyUnpacking and Lifting To unpack and move the lathe/millInstalled Accessories Figure Packaged Accessories FigureInventory 4-Way Tool Post and Compound RestClean Up Placement LocationSite Considerations Floor LoadOperation Safety The Power SupplySECTION 4 LATHE OPERATIONS Loose hair and cloth ing could get caught in machinery and cause seriTo begin the test run & break-in procedure Test Run & Break-InTo remove and install the chuck or face plate Mounting the Chuck and the FaceplateNote The chuck need not be removed from the spindle to swap the jaws Replacing the JawsTo remove a set of jaws To install the four-jaw chuck Using the Four-Jaw ChuckTo load a workpiece in the four-jaw chuck Using the Faceplate To install the faceplateTo load a workpiece Make sure your clamping application will not failUsing the Tailstock To install the MT#3 drill chuckDrilling with the Tailstock To use the tailstockTo setup the tailstock to cut tapers Cutting Shallow Tapers with TailstockAligning Tailstock To align the tailstockFigure 22. Tailstock adjustment option #1 Figure 23. Tailstock adjustment option #25. Place the live center in the tailstock 7. Turn approximately 0.010 off the diameterTo install the MT#5 dead center in the spin- dle Using the Follow Rest Using the Steady RestTo use the steady rest Using the Tool Post Using the Compound RestTo set the angular position Using the Manual Feed Handwheels Setting the Spindle RPMLongitudinal Handwheel Cross Slide HandwheelCutting Speed x Diameter of Cut = RPMSetting the Power Feed Rate To set and engage the power feedNote All change gears are stamped with the number of teeth they have M N ATo setup for threading Setup for ThreadingNote All change gears are stamped with the number of teeth they have Change Gear Chart G0492 12 X 36 Combo Lathe/MillSECTION 5 MILL OPERATIONS To begin the start up procedureTest Run & Break-In Using the Mill Table Positioning the HeadstockCross Slide Longitudinal Feed ControlInstalling Cutters To install a cutter in the spindleRemoving Cutters To remove a cutter from the spindleUsing the Mill To determine and set the mill to the needed cutting RPMCutting Speeds for High Speed Steel HSS cutting tools To use the quillSECTION 6 MAINTENANCE Basic MaintenanceGeneral Cleaning General LubricationBelt Adjustment or Replacement To replace or adjust the V-beltsCross Slide Backlash Adjustment SECTION 7 SERVICEGib Adjustments Electrical Component and Connection Index See FigureElectrical Connections Figure 58. Contactor wiring KM1 Figure 59. Junction block wiringFigure 60. Contactor wiring KM2 and KM3 Figure 61. Contactor wiring KM2 and KM3Figure 66. Mill power switch Figure 69. Lathe motor direction limit switchesElectrical Connections Figure 64. Motor connection Figure 65. Start capacitor220V Wiring Diagram Emergency Stop Switch Power Lamp Jog Button Figure 70. Lathe controlsFigure 71. Lathe control panel wiring Electrical ConnectionsTroubleshooting Motor & ElectricalOperation and Work Results TroubleshootingOperation and Work Results Continued TroubleshootingH2689-R8 Quick Change Collet Set SECTION 8 ACCESSORIESH4959-Coolant Dispenser 0000 Series Parts List SECTION 9 PARTSElectrical Box 0000 Series PartsLathe Change Gear Housing Diagram 1000 Series Parts G0492 12 X 36 Combo Lathe/Mill1000 Series Parts List PART #DESCRIPTION PART #G0492 12 X Leadscrew Gearbox Diagram 2700 Series PartsCombo Lathe/Mill 2700 Series Parts List PART #DESCRIPTION PART #Thread Dial Diagram 3000 Series Parts3000 Series Parts List PART #DESCRIPTION PART #Compound Rest and Tool Post Diagram 3500 Series Parts3500 Series Parts List PART #DESCRIPTION PART #Bed 4000 Series PartsG0492 X 36 Combo Lathe/Mill4000 Series Parts List PART #DESCRIPTION PART #Steady Rest and Follow Rest Diagram 4500 Series Parts4500 Series Parts List PART #DESCRIPTION PART #Tailstock Diagram 5700 Series Parts5700 Series Parts List PART #DESCRIPTION PART #Apron Diagram 6000 Series Parts6000 Series Parts List PART #DESCRIPTION PART #Headstock Diagram 7500 Series Parts7500 Series Parts List PART #DESCRIPTION PART #Mill Column Diagram 8000 Series Parts8000 Series Parts List PART #DESCRIPTION PART #Accessories and Labels Diagram 9000 Series Parts9000 Series Parts List PART #DESCRIPTION PART #WARRANTY AND RETURNS G0492 12 X 36 Combo Lathe/Mill Page