Grizzly g0747, g0748 owner manual Adjusting Leadscrew Backlash, Axis Leadscrew Backlash

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Adjusting Leadscrew

Backlash

Leadscrew backlash is the amount of motion the leadscrew rotates before the attached device begins to move.

Leadscrews will always have a certain amount of backlash that will increase with normal wear. Generally, 0.005"–0.010" leadscrew backlash is acceptable to ensure smooth movement and reduce the risk of premature thread wear. However, if you find it necessary to adjust leadscrew back- lash, perform the procedures listed below.

Tools Needed	Qty
T-Handle Hex Wrench 5mm	................................ 1
Hex Wrench 3mm	2
Hex Wrench 8mm	1
Wrench 19mm	1

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X-Axis Leadscrew Backlash

1.DISCONNECT MILL FROM POWER!

2.loosen the two cap screws on the X-axis leadscrew nut accessed from underneath the left side of the table (see Figure 65).

Cap Screws

Figure 65. X-axis leadscrew nut cap screws (viewed from underneath left side of table).

3.rotate the adjustment plate on the leadscrew nut in small increments, then check the amount of backlash.

4.When you are satisfied with the adjustment, re-tighten the two cap screws.

Model G0747/G0748 (Mfg. Since 8/12)

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Contents For models manufactured since 8/12 Page Table of Contents Wiring Introduction Machine Description Manual AccuracyContact Info Front View Identification Model G0747 Headstock Identification Model G0748 Headstock Identification Machine Data Sheet Main Specifications Operation Info Model G0748 Vertical Mill Variable Speed Variable Safety Safety Instructions for MachineryPage Additional Safety for Milling Machines Full-Load Current Rating Power SupplyAvailability Circuit Requirements forMinimum Gauge Size 14 AWG Grounding InstructionsExtension Cords 50 ftSetup Needed for SetupUnpacking Inventory Small Item Inventory Figure QtyCleanup Before cleaning, gather the followingBasic steps for removing rust preventative Site Considerations Lifting & Placing HEAVy LiftTo lift and move the mill Bolting to Concrete Floors Leveling & MountingLeveling Machine MountsAssembly Initial LubricationTo assemble the mill Test Run Mill Test RunPower Feed Test Run To test the power feedInspections Adjustments To perform the spindle break-in procedureSpindle Break-In Operations Operation OverviewTable Movement Graduated Index RingsTable Locks Axis Power Feed Identification Head Movement Axis Power Feed OperationTo operate the X-axis power feed Tool Needed QtyTilting Head Forward/Backward Rotating Head Left/RightRam Movement Moving Ram Forward/BackwardRotating Ram Recommended Cutting Speed FPM x Spindle SpeedDetermining Spindle Speed Tool Diameter in inches xSetting Model G0747 Spindle Speed To set the Model G0747 spindle speedLow Spindle Speed Range Setting Model G0748 Spindle Speed To set the Model G0748 spindle speedSpindle Downfeed Downfeed ControlsCoarse Downfeed Fine DownfeedTo use the coarse downfeed Auto-Downfeed To use the auto-downfeedSpindle Brake Model G0747 brake lever G0748 Brake LeverUnloading Tooling Loading/Unloading ToolingLoading Tooling Tools Needed QtyAccessories G1076-52-PC. Clamping KitG7155-6 Precision Milling Vise G9299-10 Yuasa-Type Rotary TableMaintenance Cleaning ProtectingSchedule Lubrication QuillTable Ways One-Shot Oiler Headstock GearingRam Ways Head Tilt & Ram PinionsTable Elevation Leadscrew Power Feed Gears To lubricate the power feed gearsMachine Storage Service TroubleshootingSymptom Possible Cause Possible Solution Symptom Possible Cause Possible Solution Adjusting Gibs Saddle gib and adjustment screw Knee Gib Adjustment ScrewAdjusting Leadscrew Backlash Axis Leadscrew BacklashCross Leadscrew Backlash Tramming Spindle To tram the spindle to the tablePage Wiring Wiring Safety InstructionsG0747 Wiring Diagram G0748 Wiring Diagram Parts MainMain Parts List DescriptionAxis Leadscrews DescriptionDownfeed System Downfeed System Parts List CAM ROD Sleeve Assembly G0747 Headstock G0747 Headstock Parts List PFH30M Flat HD SCR M5-.8 XG0748 Headstock G0748 Headstock Parts List Headstock Front COVER, Aluminum One-Shot Oiler Accessories G0747 Machine Labels & Cosmetics G0748 Machine Labels & Cosmetics Model G0747/G0748 Mfg. Since 8/12 Warranty Card CommentsGrizzly INDUSTRIAL, INC BOX BELLINGHAM, WAWarranty & Returns