Southbend SB1313 Lathe User Manual
Contents
1. Insert jaw 1 into jaw guide 1 and hold the jaw against the scroll gear Rotate the chuck key clockwise one turn to engage the tip of the scroll gear lead thread into the jaw Pull the jaw it should be locked into the jaw guide Install the other jaws in the same manner and install a new grease fitting if the ball or nipple leak grease Line up the timing mark on the chuck and the mounting plate and fasten both halves by tightening and torquing the fasteners as outlined in Step 13 in Installation South Bend Lathe Co 3 Troubleshooting If you need replacement parts or if you are unsure how to do any of the solutions given here feel free to call us at 860 734 1540 Symptom The chuck has hard spots or binds completely The workpiece slips in the jaws Clamping accuracy is poor Possible Cause Jaw is in wrong position Lack of lubrication rust burrs or metal shavings inside of chuck Broken tooth on the pinion or the scroll gear Incorrect jaw or workpiece clamping position Insufficient pinion and scroll gear torque Cutting overload Chuck is binding before full clamping is achieved Workpiece is improperly clamped or jaw is loose or incorrectly seated Chuck loose mounting is off center Possible Solution Reinstall jaws in correct order and position on scroll gear Disassemble de burr clean and lubricate chuck Disassemble replace broken parts if possible and2. reassemble chuck Reposition jaws and workpiece for maximum scroll gear and jaw engagement is achieved Tighten chuck key to 65 ft Ibs Reduce cutting depth or feed rate Disassemble and service rebuild chuck Remove jaws clean de burr and re install with jaw mounting caps crews torqued to 29 ft lbs Remove chuck clean and de burr mounting and re or it is improperly seated install or machine a new mounting plate Parts Diagram Parts List REF PART PSB1313001 z 3 4 5 7 9 DESCRIPTION GREASE FITTING PSBIS1Z006 PINION Fo9B1515007 SCROLL GEAR PSBISZ1I3008 CHUCK KEY W SPRING z E Z 12 15 PBI74M HEX BOLT MIO L5 X39 BLK CIZ 2 Please Note We included this breakdown for service purposes only Since many of the parts shown are machined to each individual chuck they are not available as replacement items Copyright March 2010 By South Bend Lathe Co WARNING No portion of this manual may be reproduced in any shape or form without the written approval of South Bend Lathe Co CR12664 Printed in Taiwan www southbendlathe com 4 South Bend Lathe Co
3. GI 2 grease If the chuck ever becomes stiff to operate it may have been contaminated with metal chips or abrasives from neglect or poor service practices The chuck must be dissembled cleaned and re lubricated To disassemble the chuck for a full cleaning and lubrication service 1 2 DISCONNECT LATHE FROM POWER Mark the chuck and the mounting plate where they mate to ensure that when reassembled both halves line up Next unbolt the chuck and separate both halves Insert and rotate the chuck key counterclockwise until the scroll gear has released all three jaws Using a 4mm and 6mm hex wrench a 1 standard screwdriver and a ratchet with a 7mm socket start at 1 and disassemble the chuck in the sequence shown in Figure 2 Note Each jaw is marked 1 2 3 or 4 to correspond to its marked slot in the chuck 10 11 Figure 2 Chuck sequence of disassembly Using mineral spirits clean and dry all components Inspect all bores teeth pins and mating surfaces for wear burrs galling rust or cracks Without changing the dimension of any part use a wire brush emery cloth or dressing stones to remove any rust burrs or high spots caused by galling Coat all parts with any automotive NLGI 2 grease and carefully reassemble the chuck in the reverse order shown in Figure 2 Rotate the chuck key clockwise until you see the tip of the scroll gear lead thread just begin to enter jaw guide 1
4. Instruction Sheet Model B1313 High Precision 6 Lathe Chuck AWARNING Chucks are heavy Get assistance when installing or removing the chuck from the lathe Wear heavy duty leather boots for foot and toe protection and keep hands and fingers away from all pinch points Ignoring this warning can lead to a severe crushing injury or finger amputation Specifications OD Clamping Range 0 32 6 30 8 160mm ID Clamping Range 2 17 5 90 55 150mm Outer Diameter 008 6 57 167mm Maximum Chuck Key Torque 58 ft lbs Maximum Jaw Gripping Force 4721 lbs Maximum Speed oseere 2000 RPM Two Piece Hardened Steel Jaws Yes Plain Back Mounting eccere Yes Jaw Mounting Cap Screw Torque 29 ft lbs Grease Fitting Lubricated 006 Yes Cast Iron Construction cccecceeeceeees Yes Chuck VV C1 AG osc oxcasncsnneseeadaausceseccovssaseacss 20 lbs OOP erer E E EE Taiwan Maximum handle torque and gripping force is given at full jaw and scroll gear engage ment If jaw and scroll gear are partially engaged clamping force and gripping force is reduced If you need help with your new item contact us at 360 734 1540 FAX 360 676 1075 South Bend Lathe Co Four hardened steel jaws for durability and extreme clamping force and grip y Grease fitting for complete internal _lubrication Designed for up to 2000 RPM Universal plain ba
5. ck mounting Two piece jaws for speedy internal external clamping changes Manufactured with high tech German CNC machinery Figure 1 Features Installation 1 DISCONNECT LATHE FROM POWER 2 Mount the back plate on the spindle 3 Accurately measure the inside of the back relief bore on the chuck This dimension is critical and should be 0 001 4 Face and true the diameter of the back plate Make passes across the face until the entire surface has been cut 5 Turn a shoulder into the face 14 deep and 0 001 to 0 002 larger than the back relief bore diameter Remember that this is a press fit Chamfer the corner a small amount to prevent any burrs when installing 10 11 12 13 14 2 While the back plate is still installed in the lathe scribe a 147mm diameter centerline in the face of the back plate This centerline is for the chuck mounting bolt holes Along the circumference of the centerline just scribed mark and center punch the three mounting bolt hole locations 120 apart Remove the back plate from the lathe and drill three 1c diameter mounting holes completely through the back plate Clean and stone all mating surfaces until they are perfectly clean and no burrs exist Place the chuck in an oven and then set the oven to the warm setting When the oven reaches approximately 100 F turn the oven off and let the chuck sit in the oven for 30 minutes Place
6. the back plate into a freezer for 30 minutes Put on insulated leather gloves and place the chuck on the back plate Line up the mounting holes and install the three supplied hex bolts finger tight Install the back plate and chuck onto the lathe Working in an alternating pattern tighten the M10 1 5 chuck mounting hex bolts until you reach a final torque of 30 ft Ibs Alternating the tightening process avoids chuck warpage Operation and Safety Chuck Key Safety A chuck key left in the chuck can become a dangerous projectile when the spindle is started Always remove the chuck key after using it Develop a habit of not taking your hand off of a chuck key unless it is away from the machine Disconnect Power Disconnect the lathe from power before installing and removing the chuck or doing any maintenance or adjustments Accidental lathe startup can cause severe injury or death Secure Clamping A thrown workpiece may cause severe injury or even death When swapping the chuck jaw positions use a torque wrench to re torque the M8 1 25 jaw mounting cap screws to 29 ft lbs When clamping a workpiece maximum gripping force is attained at full jaw and scroll gear engagement If the jaw and scroll gear are partially engaged clamping force is reduced Chuck Speed Rating Exceeding the maximum rated speed indicated on the chuck or using excessive spindle speeds with an unbalanced workpiece can cause the workpiece to be thro
7. wn from the chuck causing a severe impact injury or even death Always use the appropriate spindle speed for the job Large Chucks Large chucks are very heavy and difficult to grasp which can lead to crushed fingers or hands if mishandled Get assistance when installing or removing large chucks to reduce this risk Protect your hands and the precision ground ways by using a chuck cradle or piece of plywood over the ways of the lathe when servicing chucks Safe Clearances Often chuck jaws will protrude past the diameter of the chuck and can contact a coolant nozzle tooling tool post or nearby components Before starting the spindle make sure the workpiece and the chuck jaws have adequate clearance by rotating the spindle through its entire range of motion by hand South Bend Lathe Co Care amp Maintenance AWARNING Always disconnect machine from power before performing maintenance or serious personal injury may result For optimum performance from your chuck follow the maintenance schedule below and never hammer on the chuck jaws or a workpiece clamped in the chuck Never subject the chuck to abrasives flame or water Daily Check correct loose mounting bolts Use a vacuum rag or brush to clean the chuck after use Never use air pressure to clean chips away from a chuck Wipe the chuck down with a thin coat of way oil to prevent surface rust Grease the chuck fitting with one to two pumps of NL
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