Southbend SB1022 Pinion Gear Backlash, Leadscrew End Play, To reduce the pinion gear backlash

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For Machines Mfg. Since 8/09

S E R V I C E

Model SB1021/SB1022

Pinion Gear Backlash

During the life of the machine, the variable speed handwheel may develop extra backlash due to normal wear of the pinion gears. If this lash becomes unacceptable, use this procedure to reduce the backlash.

Leadscrew End Play

If you notice that the leadscrew has end play and the variable speed handwheel has excess backlash after the pinion gear lash has been set, you can adjust the lead screw collars as an additional measure to reduce the backlash.

To reduce the pinion gear backlash:

1.DISCONNECT BANDSAW FROM POWER!

2.Remove the rear lower access panel, and use a 4mm hex wrench to loosen both pinion gear locking set screws (Figure 44) just enough to adjust the pinion gears.

!

Pinion Gears

 

Figure 44. Location of pinion gears.

3.Slide the pinions closer together, and tighten the set screws. If excess backlash still exists, refer to the Leadscrew End Play section, then proceed to Step 4.

Note: Make sure that the set screws remain aligned with the flats on the shaft. If one or both setscrews do not return to their original depth in the pinion gear after tightening, the alignment has probably been lost and needs to be corrected.

4.Clean and grease the pinion gears and the leadscrew, then reinstall the access panel.

To adjust the lead screw collars to reduce backlash:

1.DISCONNECT BANDSAW FROM POWER!

2.Remove the rear lower access panel, and use a 4mm hex wrench to loosen both collar locking set screws just enough to adjust the collars (Figure 45).

!

Support Boss

 

Leadscrew

Leadscrew Collars w/

Locking Set Screws

Figure 45. Leadscrew adjustment locations.

3.Slide the right-hand leadscrew collar against the support boss and tighten the set screws. If excess backlash still exists at the handwheel, you may have to readjust the pinion gear lash, replace the leadscrew half nut, or replace worn bolts or linkage (Figure 45).

Linkage

Leadscrew

Halfnut

Bolts

Figure 46. Linkage location and parts.

4.Reinstall the access panel.

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Contents Metal Cutting Bandsaw Manual Feedback UpdatesCustomer Service Scope of ManualTable of Contents Features About This MachineCapabilities Oper ation IdentificationMachine Specifications Machine SpecificationsCutting Capacity 220V, 3-Phase Wheel Bearings Shielded and Permanently Lubricated Understanding Risks of Machinery Basic Machine SafetyF E T Y Additional Metal Cutting Bandsaw Safety Preparation Overview Things Youll NeedUnpacking Cleaning & Protecting Before cleaning, gather the followingBasic steps for removing rust preventative Location Lifting & Moving Leveling & MountingLeveling Bolting to Concrete Floors AssemblyInspections Adjustments Initial LubricationSB1022 220V 3-Phase Power Source Power ConnectionSB1021 110V Prewired Power Source SB1021 220V Power SourceTo test run your machine Test RunOperation Overview Variable speed handwheel ControlsBlade Width Blade SelectionBlade Terminology Blade LengthTooth Type Tooth SetTo select the correct blade pitch Blade Pitch TPITo correctly tension the blade Blade ChangesBlade Tensioning To replace the bladeBlade Break-In Blade BreakageBlade Care & Break-In Blade CareChip Inspection Chart Blade Speed ChartTo properly position the guide post Adjusting Blade GuidesTo properly adjust the upper and lower blade guides Positioning Guide Post⁄16 To tilt the table forward or backward Tilting TableBlade Welding To tilt the table left or rightAbove 3⁄8 Blade ⁄4-3⁄8 Blade Correct Not Correct Correct Not Correct Cut and reweld Maintenance Schedule CleaningDressing Grinding Wheel Upper wheel leadscrew lubrication LubricationTo redress the rubber tires BeltsDressing Rubber Tires To check/tension/replace the V-beltsTo calibrate the table to zero To adjust the upper wheel for blade trackingBlade Tracking Table CalibrationTo align the guide post Guide Post AlignmentTo reduce the pinion gear backlash To adjust the lead screw collars to reduce backlashPinion Gear Backlash Leadscrew End PlaySymptom Possible Cause Possible Solution TroubleshootingBlade Selection section beginning on Dull blade missing teeth Replace blade Troubleshooting Electrical Safety Instructions Wiring Diagram Color KEY Wiring OverviewWelding Unit SB1021/2 Control Panel & Welding UnitElectrical Panel SB1021 110V Electrical Panel, Motor & CordSB1021 220V Electrical Panel, Motor & Cord SB1022 220V Electrical Panel, Motor & Cord Electrical Component Pictures Welding Panel Power TransformerLower Frame Lower Frame Parts List Drive System PCAP40M Drive System Parts ListUpper Frame Upper Frame Parts List Table & Tensioning System Table & Tensioning System Parts List Cabinet Door Electrical CabinetWelder Welder & Control Panel Breakdown PSBLABEL13VS Door Injury Hazard Label Machine LabelsWarranty #TRCRBLTSJB12079