Southbend SB1001 owner manual Jaw Chuck, Mounting Workpiece

Model SB1001 8K™ Lathe O P E R A T I O N For Machines Mfg. Since 8/11

4-Jaw Chuck

Refer to the Chuck Installation (see Page 25) and Chuck Removal (see Page 27) instructions to install or remove a 4-jaw chuck.

The optional Model SB1468 4-jaw chuck features independently adjustable jaws for holding non- concentric or off-center workpieces. Each jaw can be independently removed from the chuck body and reversed for a wide range of work holding versatility.

Because of the dynamic forces involved in machining a non-concentric or off-center workpiece, always use a low spindle speed to reduce risk of the workpiece coming loose and being thrown from the lathe, which could cause serious personal injury.

Mounting Workpiece

1.DISCONNECT LATHE FROM POWER!

2.Place a sturdy piece of plywood under the spindle to protect the bed ways during the installation process.

3.Use the chuck key to open each jaw so the workpiece will lay flat against the chuck face, jaw steps, or into the spindle opening.

4.Position the workpiece so it is centered in the chuck.

5.Tighten each jaw in small increments. After you have adjusted the first jaw, continue tightening the remaining jaws in an opposing sequence, as shown by the sequential order in Figure 23.

13

Workpiece

Centerpoint

42

Figure 23. 4-jaw tightening sequence.

6.After the workpiece is held in place by the jaws, use a dial indicator to make sure the workpiece is centered in the chuck.

—If the workpiece is not correctly centered, make fine adjustments by slightly loosening one jaw and tightening the opposing jaw until the workpiece is correctly positioned (see Figure 24 for an example).

Figure 24. Example photo of non-cylindrical workpiece

correctly mounted on the 4-jaw chuck.

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