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MODEL SB1231
12" 4-JAW INDEPENDENT CHUCK
Instruction Sheet
PHONE: (360) 734-1540 • www.southbendlathe.com
Independent jaw
Hardened steel jaws
screws for each
for durability and
reversible jaw
extreme clamping
Chucks are heavy! Get assistance when
force and grip
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
Direct
this warning can lead to a severe crushing
cam
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M f g . S i n c e 5 / 1 0 Model SB1231 INSTRUCTIONS • Safe Clearances: Often chuck jaws will Safety protrude past the diameter of the chuck and • Chuck Key Safety: A chuck key left in the can contact a coolant nozzle, tooling, tool chuck can become a dangerous projectile post, or saddle. Before starting the spindle, when the spindle is started. Always remove make sure the workpiece and chuck jaws the chuck key after using it. Develop a habit have adequate clearance by rotating then
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M f g . S i n c e 5 / 1 0 Model SB1231 INSTRUCTIONS Camlock Stud Installation Camlock Stud Adjustment The camlock studs that are shipped with this If the camlock studs have been pre-installed at chuck may be pre-installed from the factory. the factory, or if you are installing them for the If so skip this section and complete Chuck first time, slight machining differences between Installation and Removal on Page 4; the lathe spindle and chuck can cause one or otherwise, install the camlo
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M f g . S i n c e 5 / 1 0 Model SB1231 INSTRUCTIONS Chuck Installation and Removal 1. DISCONNECT LATHE FROM POWER! Do not install the chuck without having the camlock cap screws in place or fully 2. Lay a chuck cradle (see Figure 4) or tightened. Otherwise, the camlock studs may plywood under the chuck and over the turn with the camlocks on release, resulting in bedway to protect the precision ground the chuck being permanently locked onto the surfaces from damage and reduce the risk
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M f g . S i n c e 5 / 1 0 Model SB1231 INSTRUCTIONS 7. Tighten camlocks in a star pattern to draw To remove the chuck: the chuck in evenly and reduce the chance 1. DISCONNECT LATHE FROM POWER! of misalignment. Make sure to tighten camlocks in an incremental manner to 2. Lay a chuck cradle or plywood under the ensure that one camlock does not get fully chuck and over the bedway to protect the tightened before the others (i.e., snug the precision ground surfaces from damage and camlo
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M f g . S i n c e 5 / 1 0 Model SB1231 INSTRUCTIONS CAUTION: During the next step, the 6. Following the sequence shown in Figure 8, chuck may come off suddenly, so it tighten each jaw in small increments to move is important that you are ready to the workpiece into the required position. support its weight with a chuck cradle Check frequently to make sure the intended to prevent crushing your fingers or center point of the workpiece has not dropping the chuck. wandered away from
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M f g . S i n c e 5 / 1 0 Model SB1231 INSTRUCTIONS Care & Maintenance d ! Always disconnect a machine from power before performing maintenance or serious personal injury may result. b e d For optimum performance from your chuck, follow the maintenance schedule below. Never hammer on the chuck, jaws, or a workpiece that c Set screw is clamped in the chuck; and never subject the Jaw screw retaining pin chuck to abrasives, flame, or water. Figure 10. Chuck sequence of disassembly. Dail
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M f g . S i n c e 5 / 1 0 Model SB1231 INSTRUCTIONS Troubleshooting Symptom Possible Cause Possible Solution The chuck has 1. Jaw is in a poor position for 1. Re-install jaws for maximum engagement with jaw hard spots or binds clamping. slot and jaw screw. completely. 2. Lack of lubrication, rust, burr, or 2. Disassemble, de-burr, clean, and lubricate chuck. metal shavings inside of chuck. 3. Broken tooth on the jaw or the jaw 3. Disassemble chuck and repair/replace broken part. screw. T
