Southbend sb1016 owner manual Jaw Chuck, Changing Jaws, To change the jaw

For Machines Mfg. Since 7/09 O P E R A T I O N Model SB1016/SB1036

3-Jaw Chuck

Refer to Chuck & Faceplate Mounting instructions on Page 35 to mount the 3-jaw chuck to the spindle.

The 3-jaw scroll-type chuck included with this lathe features hardened steel jaws that center the workpiece. When the operator opens or closes the jaws with the chuck key, the jaws move in unison.

There are two sets of removable hardened steel jaws included with the 3-jaw chuck—inside and outside jaws. Use the correct jaws for the size and configuration of the workpiece to hold it firmly and securely on the chuck (see Figure

56). The outside of the jaws are used to hold the workpiece from the outer diameter.

Changing Jaws
Item Needed	Qty
Chuck Key	1
White Lithium Grease	As Needed
Chuck Cradle or Plywood 3⁄4" (to protect bed)...... 1

To change the jaw:

1.DISCONNECT LATHE FROM POWER!

2.Place a piece of wood over the ways to protect them from potential damage.

3.Insert the chuck key and turn it counterclockwise to back the jaws out and remove them.

4.Clean the jaw mating surfaces and apply a thin film of white lithium grease to the mating surfaces.

5.Set the previously-mounted jaws aside in a safe place free of moisture and abrasives.

6.Rotate the chuck key clockwise until you see the initial thread of the scroll gear just begin to enter jaw guide #1 (see Figure 58).

Figure 56. Chuck and jaw selection.

Numbered from 1–3, the jaws must be used in the matching numbered jaw guides, as shown in Figure 57.

Jaw Guide #1

Jaw

Numbers

Figure 57 Jaw guides and jaw numbers.

Initial Thread

Figure 58. Inserting jaw guide #1.

7.Insert jaw #1 into jaw guide #1 and hold the jaw against the scroll gear lead thread.

8.Rotate the chuck key clockwise one turn to engage the tip of the scroll gear lead thread into the jaw. Pull on the jaw—now it should be locked into the jaw guide.

Note: The chuck does not need to be removed from the spindle to swap the jaws.

9.Repeat the Steps 6–8for jaws and guides #2 and #3.

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