Grizzly MODEL G0765 owner manual Scroll Chuck Clamping, Changing Jaw Set

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Scroll Chuck

Clamping

This 3-jaw scroll-type chuck has an internal scroll- gear that moves all jaws in unison when adjusted with the chuck key. This chuck holds cylindrical parts on-center with the axis of spindle rotation and can be rotated at high speeds if the workpiece is properly clamped and balanced.

Never mix jaw types or positions to accommodate an odd-shaped workpiece. The chuck will spin out of balance and may throw the workpiece! Instead, use an independent jaw chuck or a faceplate.

Safer Inside

 

Insufficient

 

 

Jaw Use

 

Jaw Clamping

Unstable

 

 

 

 

 

 

 

 

Workpiece

 

Bar Stock

 

 

CORRECT

 

 

INCORRECT

 

Unsafe Jaw Position and

Safer Outside

Poor Scroll Gear Engagement

 

 

 

Poor Grip

Jaw Use

 

 

 

 

 

 

 

 

Shallow

 

 

Unstable

 

Bar Stock

 

 

 

 

 

Workpiece

 

 

 

 

CORRECT

 

 

INCORRECT

Safer Outside

Unsafe Inside

 

Jaw Use

Jaw Use

 

 

Poor Scroll

 

 

 

 

Shallow

 

Gear

 

Bar Stock

 

Engagement

 

Unsafe Jaw

 

 

CORRECT

Position

 

INCORRECT

Safer Inside

 

Unsafe Jaw Position

Jaw Use

 

 

 

 

 

Cylinder

 

 

 

CORRECT

Poor Scroll

INCORRECT

Gear Engagement

Figure 22. Jaw selection and workpiece holding.

Model G0765 (Mfd. Since 12/13)

Changing Jaw Set

The 3-jaw scroll chuck included with the lathe features inside and outside hardened steel jaw sets (see Figure below), which move in unison to center a concentric workpiece.

When installing the jaws, it is important to make sure they are installed correctly. Incorrect installa- tion will result in jaws that do not converge evenly and are unable to securely clamp a workpiece.

Outside Set

Inside Set

Figure 23. Chuck and jaw selection.

Jaws are numbered from 1–3 (see Figure below). The number is typically stamped on the side or bottom. Jaws are designed to be installed coun- terclockwise in numerical order in the jaw guides, so they will hold a concentric workpiece evenly.

 

Jaw Guides

Jaw Numbers

 

1

2

3

 

Figure 24. Jaw guide and jaw numbers.

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Contents Model G0765 14 Benchtop Lathe Page Table of Contents Control Panel Wiring ServiceContact Info IntroductionMachine Description Manual Accuracy Identification Carriage Controls ComponentsControl Panel End Gears Tailstock Rear ControlsMachine Data Sheet Tailstock Info Features Safety Instructions for Machinery SafetyPage Additional Safety for Metal Lathes Additional Chuck Safety Availability Power SupplyFull-Load Current Rating 110V Circuit RequirementsExtension Cords Grounding & Plug RequirementsMinimum Gauge Size 14 AWG 50 ftNeeded for Setup SetupPreparation UnpackingPackaged Components Figures Qty Installed Components Figure QtyInventory Basic steps for removing rust preventative CleanupBefore cleaning, gather the following Site Considerations Power Connection AssemblyConnecting Power Disconnecting PowerTest Run Disengaged Spindle Break-In Recommended AdjustmentsFactory adjustments that should be verified Operation Overview OperationsChuck & Faceplate Mounting Installation Removal DeviceTools Needed Qty Chuck InstallationTo install the chuck Changing Jaw Set Scroll Chuck ClampingTo change the jaw set To mount a non-concentric workpiece to the faceplate FaceplateTailstock Using QuillTailstock Quill Specs Positioning TailstockOffsetting Tailstock Installing ToolingTo install tooling in the tailstock Removing ToolingTo offset the tailstock Aligning Tailstock to Spindle CenterlineItems Needed Qty To align the tailstock to the spindle centerlinePage Dead Centers CentersMounting Dead Center in Spindle Removing Center from SpindleRemoving Center from Tailstock Mounting Center in TailstockMounting Workpiece Between Centers To mount a center in the tailstockSteady Rest Tools Needed for Installation/Removal QtyTo install and use the steady rest Compound Rest Four-Way Tool Post Installing ToolBelow are two common methods Aligning Cutting Tool with Spindle CenterlineTo align cutting tool with tailstock center Top ViewSpindle Speed Manual FeedSetting Spindle Direction & Speed Setting Spindle Speed RangeConfiguration Example To set spindle speed to 100 RPMPower Feed Controls Power FeedTo set power feed for 0.04 in./rev Setting Power Feed RatePower Feed Configuration Primary Threading ConfigurationSecondary Threading Configuration End Gears40T 65T Gear 50 T Ge ar 20 TPI End Gear Configuration ExampleTo configure end gears for threading 20 TPI Page Headstock Threading Controls ThreadingTo set the lathe to thread 20 TPI Feed Direction LeverThread Dial Thread Dial ChartApron Threading Controls Dial Number Thread Dial D3640-Shop Fox Tool Table Plus AccessoriesSchedule MaintenanceCleaning/Protecting Ball Oilers LubricationLubrication Frequency Cross Slide & Compound Slide Leadscrew & Carriage RackBedways Change Gear Bushing Machine StorageTumbler Gears Preparing Lathe for StorageSymptom Possible Cause Possible Solution ServiceTroubleshooting Lathe Operation Leadscrew End-Play Adjustment Backlash AdjustmentCross Slide To remove leadscrew end playTo adjust cross slide and compound slide gibs Gib AdjustmentFuse Replacement Half Nut AdjustmentTo adjust half nut To replace fuseTo replace motor brushes Brush ReplacementTensioning Timing Belt Timing Belt Tension ReplacementReplacing Timing Belt Wiring Safety Instructions WiringMachine Frame Control Panel WiringG0765 wiring overview Control Panel Wiring Photos110 VAC Motor/Speed Sensor/ Plug WiringMain Description Description 255 254 256 257 259 258 253 252 261 251 260 Labels & Cosmetics FrontAppendix Threading ChartsComments Warranty CardBOX BELLINGHAM, WA Grizzly INDUSTRIAL, INCWarranty & Returns