Southbend SB1049 Lathe User Manual
Contents
1. clamping force is reduced Speed Rates Operating the lathe where maximum chuck speed is exceeded or at too high of a speed for an unbalanced workpiece can cause the workpiece to be thrown from the chuck Always use the appropriate feed and speed rates A thrown workpiece may cause severe injury or even death 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 saddle Before starting the spindle make sure the workpiece and the chuck jaws have adequate clearance by rotating it through its entire range of motion by hand Stopping Lathe By Hand Stopping the spindle by putting your hand on the workpiece or chuck creates an extreme risk of entanglement impact crushing friction or cutting hazards Never attempt to slow or stop the lathe chuck by using your hand Allow the spindle to come to a stop on its own or use the brake if equipped Long Stock Safety Long stock can whip violently if not properly supported causing serious impact injury and damage to the lathe Reduce this risk by supporting any st2. 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 Parts Diagram Possible Cause Jaw is in wrong position Lack of lubrication rust burr 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 improperly clamped or jaw is loose or incorrectly seated Chuck loose mounting is off center or it is improperly seated REF PART Possible Solution Reinstall jaws in correct order and position on scroll gear Disassemble de burr clean and lubricate chuck Disassemble and rebuild chuck Reposition jaws and workpiece for maximum scroll gear and jaw engagement is achieved Tighten chuck key to 101 ft lbs Reduce cutting depth or feed rate Disassemble and service rebuild chuck Remove jaws clean de burr and reinstall with jaw mounting caps crews torqued to 79 ft lbs Remove chuck clean and de burr mounting and reinstall or machine a new mounting plate Parts List DESCRIPTION PSB1IS10001 GREAGE FITTING 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 rep
3. set of metric hex wrenches and a 1 standard screwdriver start at 1 and disassemble the chuck in the sequence shown in Figure 2 South Bend Lathe Co 10 11 12 Note Each jaw is marked 1 2 or 3 to correspond to its marked slot in the chuck 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 all rust burrs and any 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 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 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 9 in Chuck Installation Troubleshooting If you need replacement parts or if you are unsure how to do any of the solutions given
4. Instruction Sheet Model B1310 High Precision 9 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 43 8 66 11 220mm ID Clamping Range 2 75 8 27 70 210mm Outer Diameter 0008 9 17 233mm Maximum Chuck Key Torque 101 ft lbs Maximum Jaw Gripping Force 6744 lbs Maximum Speed cccceecceeeceeees 2000 RPM Two Piece Hardened Steel Jaws Yes Plain Back Mounting l Yes Jaw Mounting Cap Screw Torque 79 ft lbs Grease Fitting Lubricated 068 Yes Cast Iron Construction cccccccceeeeeeees Yes Chuck WV C18 Go scox ccnsiuin sdvnsdaawsceatecnosedce secs 45 lbs TCA eee A AE 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 Grease fitting for az complete internal oo Hardened steel jaws for durability and extreme clamping force and grip lubrication Designed for up to 2000 RPM Un
5. iversal plain back mounting e Two piece jaws for speedy internal external clamping changes PSN Manufactured with high tech Q SOUTH BEND German CNC machinery Figure 1 Features Installation 1 UNPLUG THE MACHINE 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 the back plate to true it Make passes across the face until its 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 si 10 Set the chuck on the back plate aligning the shoulder with the relief bore Use a transfer punch to mark the back plate If a transfer punch is not available a drill bit of the same size as the mounting holes in the chuck can be used Lightly tap on the bit rotate it 90 and tap it again Remove the chuck from the back plate and center punch the marks Drill and tap the holes for M12 1 75 threads Remove the back plate from the lathe and place it in to a freezer for 30 minutes and place the chuck in an oven at 100 F for the same amount of time Put on insulated leather gloves and place the chuck on the back plate Line up the mounting holes and thread in the cap screws sup
6. lacement items Copyright January 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 CR12486 Printed in Taiwan www southbendlathe com South Bend Lathe Co
7. ock that extends from the chuck headstock more than three times its own diameter Always turn long stock at slow speeds 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 e Check correct loose mounting bolts e Keep the chuck clean and oiled e Use a vacuum rag or brush to clean the chuck after use Never use air pressure to clean chips away from a chuck e Avoid leaving the chuck clamped on a workpiece unload the chuck jaws daily e Make sure the chuck key is removed from the chuck when not using the key 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 UNPLUG THE MACHINE FROM POWER 2 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 3 Insert and rotate the chuck key counterclockwise until the scroll gear has released all three jaws 4 Using a basic
8. plied Snug the first M12 1 75 cap screw then al ternate the cap screws across the chuck until you reach a final torque of 79 ft lbs Alternat ing the tightening process insures the chuck will be pressed on straight This step should be repeated until the back plate fits snugly against the chuck If the chuck fits loosely on the back plate or is crooked on the shoulder it will be necessary to recut the back plate face and shoulder again If you are also in stalling the chuck by threading the M12 1 75 hex bolts into the chuck from the back side of the mounting plate repeat Step 9 on these bolts but torque them to 43 4 ft lbs Operation and Safety 2 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 M12 1 75 jaw mounting cap screws to 79 ft lbs When clamping a workpiece maximum gripping force is attained at full jaw and scroll gear engagement If jaw and scroll gear are par tially engaged
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