Grizzly Manual Lathe

The Grizzly Manual Lathe is a precision metalworking machine designed for turning, facing, threading, and drilling operations. It features variable speed control, hardened and ground bedways, quick-change gearbox for threading, D1-4 camlock spindle, inch/metric threading capabilities, and a heavy-duty cast iron construction. Below are key sections for safety, features, installation, setup, operation, and maintenance.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Tooling and Accessories 7. Basic Operations 8. Threading Procedures 9. Maintenance & Lubrication 10. Safety Information 11. Troubleshooting

Features at a Glance

Key components: Headstock with spindle, Bedways, Carriage assembly, Tailstock, Quick-change gearbox, Apron controls, Motor and drive system.

Feature	Description
Spindle	D1-4 camlock, hardened and ground, MT#5 taper
Swing over bed	14-inch capacity
Distance between centers	40-inch standard
Spindle speeds	Variable 50-2000 RPM
Threading	Quick-change gearbox for inch and metric threads
Motor	3 HP, 220V single-phase
Bedways	Hardened and ground cast iron
Carriage	Power feed for longitudinal and cross movements
Tailstock	MT#3 taper, quill lock, offset adjustment
Controls	Forward/stop/reverse lever, feed direction selector

Installation

Unpack and inspect all components. Place on level, reinforced concrete floor.

Foundation: Ensure floor can support 1500 lbs. Use leveling feet to eliminate twist.
Electrical connection: Connect to 220V single-phase circuit with proper grounding.
Lubrication: Fill headstock, gearbox, and apron with recommended oils before operation.
Alignment: Check bed level and align headstock/tailstock using test bar.

WARNING! Lathe is extremely heavy; use proper lifting equipment. Ensure all bolts are tightened to specified torque.

First-Time Setup

After installation, perform initial setup procedures.

Lubrication: Check all oil levels and grease points per lubrication chart.
Spindle run-in: Run spindle at low speed (200 RPM) for 30 minutes to distribute oil.
Backlash adjustment: Adjust cross-slide and compound rest gibs for minimal play.
Tool post setup: Install quick-change tool post and align cutting tools to center height.

CAUTION! Never operate without proper lubrication. Wear safety glasses at all times.

Specifications

Swing over bed: 14 inches
Distance between centers: 40 inches
Spindle bore: 1.5 inches
Spindle taper: MT#5
Spindle speeds: 50-2000 RPM (variable)
Threading range: 4-112 TPI (inch), 0.2-7 mm pitch (metric)
Motor: 3 HP, 220V single-phase
Weight: Approximately 1500 lbs
Bed width: 7 inches
Tailstock taper: MT#3

Controls and Settings

Main controls located on headstock and apron. Headstock: Spindle speed selector, Threading chart, Forward/neutral/reverse lever. Apron: Carriage handwheel, Cross-slide handwheel, Compound rest handwheel, Feed engagement lever, Half-nut lever for threading.

Quick-change gearbox: Select lever positions for desired thread pitch or feed rate. Refer to gearbox chart for settings.

Speed control: Adjust via belt position and variable speed dial. Feed direction: Select longitudinal or cross feed via apron lever. Clutch: Engage/disengage power feed with clutch knob.

Tooling and Accessories

Standard accessories: 3-jaw chuck, 4-jaw chuck, Faceplate, Centers (live and dead), Tool post, Wrenches.

Chuck installation: Mount on spindle nose using camlock pins. Rotate pins to lock position.
Tool holders: Use quick-change tool post for rapid tool changes. Ensure tools are at center height.
Centers: Insert dead center in tailstock; live center in spindle for between-centers work.
Steady rest: For supporting long workpieces; adjust fingers to contact workpiece evenly.

Tip: Always remove chuck key immediately after use. Keep tools sharp and properly ground.

Basic Operations

Fundamental lathe operations: Facing, Turning, Drilling, Boring, Knurling.

Facing: Mount workpiece in chuck. Bring tool to face, engage cross feed for facing cut.
Turning: Set desired diameter using compound rest. Engage longitudinal feed for turning.
Drilling: Mount drill in tailstock. Advance tailstock quill using handwheel.
Boring: Use boring bar for internal diameters. Set tool below center for proper clearance.
Knurling: Use knurling tool at slow speed with ample cutting fluid.

WARNING! Never attempt to measure workpiece while spinning. Stop lathe before adjusting tool post.

Threading Procedures

Using quick-change gearbox for threading operations.

Select thread: Set gearbox levers per threading chart for desired TPI or mm pitch.
Engage half-nut: At marked position on threading dial for inch threads.
First pass: Take light cut (0.002-0.005 inches). Use compound rest set at 29 degrees.
Disengage: Reverse spindle to return tool without cutting. Repeat for subsequent passes.
Check thread: Use thread pitch gauge or nut to verify fit.

CAUTION! Always disengage half-nut before reversing. Use cutting fluid for steel threading.

Maintenance & Lubrication

Daily: Clean chips, check oil levels. Weekly: Lubricate all oil points. Monthly: Check belt tension, gib adjustments.

Lubrication points: Headstock oil bath, Gearbox oil, Apron oil reservoir, Tailstock quill, Carriage ways.

CAUTION! Use only recommended lubricants. Never use compressed air to clean electrical components.

Safety Information

Always wear safety glasses. Remove chuck keys immediately. Secure long hair and loose clothing. Never leave machine running unattended. Use proper workpiece guarding when possible. Disconnect power before maintenance.

Emergency stop: Familiarize with stop button location. Keep floor clear of oil and chips.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Excessive vibration	Unbalanced workpiece, loose chuck	Balance workpiece; tighten chuck properly; check foundation
Poor surface finish	Dull tool, incorrect speed/feed	Sharpen tool; adjust speed/feed; check tool height
Threads not accurate	Gearbox setting wrong, half-nut timing	Verify gearbox settings; engage half-nut at correct dial position
Power feed not engaging	Clutch adjustment, shear pin	Adjust clutch tension; replace shear pin if broken
Overheating spindle	Low oil, excessive load	Check oil level; reduce depth of cut; allow cool-down

Service: Contact Grizzly Industrial at 1-800-523-4777 or visit www.grizzly.com

Parts: Use model number G4000 for ordering replacement parts.