Grizzly MODEL G0765 owner manual Manual Feed, Spindle Speed

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Manual Feed

The cutting tool can be manually fed into the workpiece using the carriage, cross slide, and compound rest handwheels shown below.

Carriage

Handwheel

Compound

Rest

Handwheel

Cross Slide

Handwheel

Figure 45. Manual feeding controls.

Carriage Handwheel

Graduated Dial

 

Increments

0.01" (0.25mm)

One Full Revolution

0.8" (20.3mm)

The carriage handwheel moves the carriage left or right along the bed. Adjust the position of the graduated scale by holding the handwheel with one hand and turning the dial with the other.

Cross Slide Handwheel

Graduated Dial

 

Increments

0.001" (0.025mm)

One Full Revolution

0.04" (1.02mm)

Use this handwheel to move the tool toward and away from the work. The cross slide handwheel has an indirect-read graduated dial. This means the distance shown on the scale represents the actual distance the tool moves.

Compound Rest Handwheel

Graduated Dial

 

Increments

0.001" (0.025mm)

One Full Revolution

0.04" (1.02mm)

Use this handwheel to move the cutting tool lin- early along the set angle of the compound rest. Set the compound rest angle by hand-rotating it and securing in place with two cap screws. The compound rest has an indirect-read graduated dial.

Model G0765 (Mfd. Since 12/13)

Spindle Speed

Using the correct spindle speed is important for getting safe and satisfactory results, as well as maximizing tool life.

To set the spindle speed for your operation, you will need to: 1) Determine the best spindle speed for the cutting task, and 2) configure the lathe controls to produce the required spindle speed.

Determining Spindle Speed

Many variables affect the optimum spindle speed to use for any given operation, but the two most important are the recommended cutting speed for the workpiece material and the diameter of the workpiece, as noted in the formula shown below.

*Recommended

 

Spindle

Cutting Speed (FPM) x 12

 

=

Speed

 

 

Dia. of Cut (in inches) x 3.14

 

(RPM)

*Double if using carbide cutting tool

Figure 46. Spindle speed formula for lathes.

Cutting speed, typically defined in feet per minute (FPM), is the speed at which the edge of a tool moves across the material surface.

A recommended cutting speed is an ideal speed for cutting a type of material in order to produce the desired finish and optimize tool life.

The books Machinery’s Handbook or Machine Shop Practice, and some internet sites, pro- vide excellent recommendations for which cutting speeds to use when calculating the spindle speed. These sources also provide a wealth of additional information about the variables that affect cutting speed and they are a good educational resource.

Also, there are a large number of easy-to-use spindle speed calculators that can be found on the internet. These sources will help you take into account the applicable variables in order to deter- mine the best spindle speed for the operation.

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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