Southbend 18' & 60: EVS Toolroom Lathes 220v sb1016 - Manual (Page 42)

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For Machines Mfg. Since 7/09 Model SB1016/SB1036 O P E R A T I O N
— If installed correctly, the jaws converge
together at the center of the chuck.
— If the jaws do not come together, the
initial thread was missed on one of the
jaws. Remove all the jaws and start again.
Mounting Workpiece
Items Needed .....................................................Qty
Chuck Key ............................................................. 1
Chuck Cradle or Plywood 3⁄4" (to protect bed) .... 1
To mount a workpiece in the 3-jaw chuck:
1. DISCONNECT LATHE FROM POWER!
2. If the workpiece is large and heavy, place a
chuck cradle or plywood on the bedway below
the chuck to protect it.
3. Use the chuck key to move the jaws and
mount the workpiece into the chuck (refer to
Figure 59 for typical mounting methods).
4. Rotate the chuck by hand to make sure the
workpiece makes even contact with all three
jaws and spins evenly without any visible
wobble.
— If the workpiece is not evenly held or is
off-center, repeat Steps 3–4.
5. After verifying that the workpiece is properly
centered, fully tighten the jaws to make sure
the workpiece is held securely, so it will not
come loose during operation.
Figure 59. Typical of 3-jaw chuck mounting methods.
Mounting on an Outside Diameter
Mounting in an Inside Diameter
4-Jaw Chuck
Refer to Chuck & Faceplate Mounting
instructions on Page 35 to mount the 4-jaw
chuck to the spindle.
The 4-jaw chuck features independently
adjustable hardened steel jaws to hold non-
cylindrical or off-center workpieces. Each jaw can
be removed from the chuck body and reversed for
a wide range of work holding versatility.
Mounting Workpiece
Items Needed Qty
Chuck Key ............................................................. 1
Chuck Cradle or Plywood
3 ⁄
4
" (to protect bed) ...... 1
To mount a workpiece on the 4-jaw chuck:
1. DISCONNECT LATHE FROM POWER!
2. Place a chuck cradle or plywood on the
bedway below the chuck to protect it.
3. Use the chuck key to open each jaw so the
workpiece will lay flat against the chuck face
or jaw steps.
4. With help from another person or a
supporting device, mount the workpiece
centered on the chuck, then turn each jaw
until it makes contact with the workpiece.
5. Tighten each jaw in small increments. After
you have adjusted the first jaw, continue
tightening in an opposing sequence, as
shown in Figure 60.
Figure 60. 4-jaw tightening sequence.
1
2
3
4
Workpiece
Center Point