Jaw Chuck, CiZgcVa?Vl, MiZgcVa?Vl, VlXjX`# | Grizzly G4791

8. GZijgc id i]Z [^ghi Wdai VcY i^\]iZc ^i V a^iiaZ bdgZ! i]Zc i^\]iZc i]Z di]Zg Wdaih i]Z hVbZ Vbdjci#

Note: The goal is to keep the gap between the back plate and chuck or faceplate even around the circumference while you bring them together.

9. ;^cVaan! i^\]iZc Vaa i]gZZ Wdaih jci^a i]Z \Ve WZilZZc i]Z WVX` eaViZ VcY i]Z X]jX` dg [VXZeaViZ^hXadhZYVcYi]ZWdaihVgZi^\]i#

Mounting a Chuck or Faceplate

1. 9>H8DCC:8IB68=>C:;GDBEDL:G

2. AVnVX]jX`XgVYaZhZZFigure 29dgVe^ZXZ d[eanlddYdkZgi]ZWZYlVnhWZadli]ZaVi]Z he^cYaZ id gZYjXZ i]Z g^h` d[ ^c_jgn VcY id egdiZXi i]Z egZX^h^dc \gdjcY hjg[VXZh d[ i]Z WZYlVn#

3. AdXViZ i]Z i]gZZ bdjci^c\ ]Zm Wdaih dc i]Z WVX` d[ i]Z he^cYaZ WVX` eaViZ VcY gZbdkZ ildd[i]Zb#

4. AddhZci]ZaVhiWdai!i]ZciVei]ZZY\Zd[i]Z X]jX`dg[VXZeaViZl^i]VbVaaZiidaddhZci]Z hZVaWZilZZci]ZWVX`eaViZVcYi]ZX]jX`dg [VXZeaViZ#

5. L^i] Vhh^hiVcXZ id hjeedgi i]Z VhhZbWan! gZbdkZi]ZaVhihXgZlVcYi]ZX]jX`dg[VXZ" eaViZ#

PINCH HAZARD! Get assistance and pro- tect your hands and the precision ground bedways with plywood or a chuck cradle when removing the lathe chuck! The heavy weight of a falling chuck can cause serious injury.

"(%"

3-Jaw Chuck

I]Z ("_Vl X]jX` hjeea^ZY l^i] ndjg aVi]Z$b^aa XdbZhl^i]ildhZihd[_Vlh!l]^X]VgZYZe^XiZY ^cFigure 31#I]ZhZVgZXdbbdcan`cdlcVhi]Z ^ciZgcVaVcYZmiZgcVa_Vlh#

>ciZgcVa?Vl

:miZgcVa?Vl

Figure 31.>ciZgcVaVcYZmiZgcVa_Vlh[dgi]Z

("_VlX]jX`#

7di] hZih d[ _Vlh XVc ]daY V ldg`e^ZXZ dc i]Z ^ch^YZ dg djih^YZ hjg[VXZ d[ i]Z _Vl hZZ Figure 32[dgZmVbeaZh#JhZndjgWZhi_jY\ZbZcil]Zc Xdc[^\jg^c\i]Z_Vlhid[^gbanhZXjgZi]Zldg`e^ZXZ idi]ZX]jX`#

8aVbe^c\dcVcDjih^YZ9^VbZiZg

8aVbe^c\^cVc>ch^YZ9^VbZiZg

Figure 32.:mVbeaZhd[jh^c\^ciZgcVaVcY ZmiZgcVa_Vlh^ci]Z("_VlX]jX`#

<),.&&'m(.AVg\Z8dbWdAVi]Z$B^aa

Image 32

$Grizzly G4791 Jaw Chuck, CiZgcVa?Vl, MiZgcVa?Vl, VlXjX`#, 8aVbec\dcVcDjihYZ9VbZiZg 8aVbec\cVcchYZ9VbZiZg$

Contents

Model G4791 Ss ,EAD from Leadbased PAINTS Table of Contents Introduction Foreword Functional OverviewContact Info &m.AVg\Z8dbWdAViZ$Baa Identification Machine Data Sheet Lathe Other Specifications !,7!93 53%3 %!2.2 02/4%#4/ %. /0%2!4.! -!#.%29 BVXcZgn cdhZ XVc XVjhZ eZgbVcZci ZVgc\adhh# 53%3!!2/5.$%$ %84%.3/..#/2$ 2!4%$4&/2/4%-!#.%!-0%2!%2 !,7!93 ,/#+ -/,% !3%33 & 53%$ % %&/2% /0%2!4. -!#.%29# Additional Safety Instructions For Mills Additional Safety Instructions for Lathes Eliminating a Projectile Hazard Circuit Requirements 220V Operation Setup Setup SafetyItems Needed for Setup Unpacking 7dai7V\dg8ZciZgEVcZa!cdihdlc InventoryInventory Figures Qty Clean Up Placement LocationSite Considerations Floor Load Placement Assembly mHjeedgi Mounting to Shop Floor Bolting to Concrete Floorsd XVWcZihiVcYhVcYiZaddg# Using Machine Mounts Check Gearbox OilTest Run To test run the machine CZjigVa 9hZc\V\ZY 11. EgZhh iZ bVc edlZg BGC8N hide Wjiidcc# Recommended Adjustments Factory adjustments that should be verifiedSpindle Break-In 9H8DCC8IB68=CGDBEDLG Operation Safety Mill OperationsBasic Mill Controls Mill Head Main Power on Button cVWaZh edlZg id adlidiZbVXcZ# CarriageCoarse Downfeed Lever GVhZh dg adlZgh iZhecYaZfjX`an# Carriage Handwheel BdkZh iZ XVggV\Z aZidgg\i# Table Movement Head MovementRotating the Mill Head Elevating the Mill Head Setting Mill Speed Configuring Mill V-BeltsCalculating Mill Spindle Speed Cutting Speeds for High Speed Steel HSS Cutting Tools Example with HSS Cutting Tool Quill Downfeed Loading & Unloading Mill ToolingLoading Tooling With Drawbar To use the downfeed controls Unloading Tooling With the Drawbar Unloading Tooling With the Drift Key 9H8DCC8IB68=CGDBEDLG JcigZVYiZYgVlWVg¶ijgch# Va\cZY# Lathe Operations Basic Lathe ControlsLathe Head Spindle Back Plate Bdjcih XjX`h VcY Main Power on Button IjgchedlZgONid iZbVXcZ# Main Power Emergency Button IjgchTailstock CdiYhXdccZXiiZbVXcZgdbedlZg# AjbWZg# Mounting/Removing Chuck or FaceplateMounting a Chuck or Faceplate Jaw Chuck CiZgcVa?VlMiZgcVa?Vl VlXjX`# Mounting Workpiece in 3-Jaw Chuck Removing Jaws from 3-Jaw ChuckTools Needed Qty iZ ldg`eZXZ h XZciZgZY! jaan i\iZc iZVlh# Installing Jaws into 3-Jaw Chuck HXgdaaZVg AZVYIgZVY GZeZVi Steps 4-5 dg Vl VcY c hZfjZcXZ# ™ IZVlhbjhiWZadVYZYchZfjZcXZWZ\c cc\liVl&# To mount a workpiece to the faceplate FaceplateVa\cZYhZZ dgVcZmVbeaZ# 9ZVY8ZciZg AViZ9d\ Using a Dead Center in the SpindleCenters Offsetting Tailstock Using a Dead Center in the TailstockTo set the tailstock offset 39# Aligning Tailstock To align the tailstock Drilling with Tailstock VbdjcidVXXjgVXnhVXZkZY# Follow Rest IjbWHXgZl 7gVhhc\Zg 8jiiZg Steady Rest To use the steady rest8aVbeHdZ HiZVYnGZhi=ZVY Compound Slide Handwheel Dial Increments ResolutionCarriage Cross Slide Table Tool Post 8VeHXgZl AdX` AZkZg IddahTo load and use the 4-way tool post GZeZVi dgiZgZbVcc\iddah# Setting Lathe Speed Calculating Correct Spindle Speed Configuring Lathe V-Belts To configure the lathe V-beltsIZchdcc\hegc\# HecYaZEjaaZnC Setting Feed Rate ExampleXVc\Z\ZVgh# Idc# Feed Rate Change Lever ZZYgViZgVc\ZaZkZg# Change Gear a Configure Change GearsTo configure the change gears Change Gear D Example of Setting Feed RateChange Gear B or C Thread Dial Threading ControlsHalf-Nut Lever VcY DgVcY¿ VaaeVhhZh# G1070-MT3 Live Center Set AccessoriesG1076-52-PC. Clamping Kit, 1⁄2 T-Nut H7540-Metalworking Kit No Wjicdihdlc#H2987-½ Bent Lathe Dog H6879-Lathe Operation & Maintenance Book H2677-6 Precision Rotary Table Schedule MaintenanceCleaning Protecting Daily Lubrication Procedures Lubrication AZVYhXgZlYgkZhViWVaadaZgh# BaaXdajbcVcYaZVYhXgZl# BaaFjaa To check and add oil to the reservoir Checking/Adding Lathe Gearbox Oil ReservoirLubricant Frequency Qty To perform the semi-annual procedure Semi-Annual LubricationAaEaj\ 9gVcEaj\ GZbdkZiZaaeaj\# 7ZkZaZVg cY8Ve GZbdkZiZbaaYgkZhnhiZbXdkZg#YjgZhZZ # AdX`HXgZl Changing Lathe Gearbox Oil To change the oil in the reservoir To adjust the motor V-belt tension Lathe V-Belt Tensioning=ZmCjih 6YjhibZci7dai EjaaZn 9ZaZXidc Service TroubleshootingMotor & Electrical Hnbeidb EdhhWaZ8VjhZ EdhhWaZHdajidc Mill Operation # Lgdc\hoZXdaaZi# # JhZXdggZXiXdaaZidghVc`YVbZiZg# Lathe Operations 42# Adjusting Gibs To adjust the saddle and table gibsTo adjust the compound gib Saddle and Table Gibs Adjusting Table Backlash To adjust the tailstock gibTo adjust the table backlash Tailstock Gib Adjusting Half-Nut Replacing Shear PinsTo adjust the half-nut HZVgEch 8dccZXic\8daaVg To adjust the lathe spindle bearing preload Lathe Bearing PreloadhZZ # AdX` HeVccZgCji LVhZg IVc\ 9VacYXVidghZije# HeVccZg Cji$&+ chiVaa iZ Vl XjX` VcY i\iZc iZ Vlh cidiZXZciZg# Wiring Electrical Safety Instructions Wiring Overview Plug Electrical Component Wiring DiagramsMain Power Switch 72 72 Mill Head Breakdown Mill Head Parts List Description Downfeed Breakdown Mill Motor Breakdown Capacitor Cover Tailstock Breakdown Bed Breakdown 8dbWdAViZ$Baa Bed Parts List Change Gear 20T Lathe Head Breakdown Lathe Head Parts List Change Gear Box Breakdown Lathe Motor Breakdown Steady Rest Breakdown Follow Rest Breakdown Compound Slide Breakdown Accessories Breakdown Label Placement Page =dlYYndjaZVgcVWdjijh4 TTTT 6YkZgihZbZci Tttt gZcY TTTT 8VgY9ZX` Tttt LZWhiZ TTTT DiZg8VWcZiBV`Zg IdYVn»h=dbZdlcZg EaVXZ HiVbe =ZgZ $5342!, .# 0/ /8 %,,.!- 7! 22!.49 !.$ 2%452.3 #ALL 4ODAYD&ORO! &2%%