- 21 -
area for clamping.
If all four jaws cannot be used to hold the workpiece, you must use the faceplate for improved clamping options.
Otherwise, a severe out-of-balance condition will be created. If spun even at an average speed, this chuck will almost
always be out of balance, and the machinist and bystanders will be at risk of being hit with a thrown workpiece.
Being hit by an ejected workpiece can be fatal.
Reversing Jaw positions & clamping a Workpiece
Shown in
Figure 18
is an example of the independent jaws holding a non-cylindrical workpiece for off-center boring.
One or more jaws can be reversed in any combination to get the best grip on the workpiece.
To use the 4-jaw chuck:
1. Disconnect lathe from power!
2. Install a center in the tailstock.
3. Open each jaw with the chuck wrench and place the
workpiece flat against the chuck face.
4. Support the workpiece and slide the tailstock forward so
the tip of the dead center presses against the workpiece.
Next, lock the tailstock in position.
5. Turn the tailstock quill so the dead center applies enough
pressure to the center point of your workpiece to hold it in
place
(see Figure 19)
, then lock the tailstock quill.
Figure 18
6. Turn each jaw until it just makes contact with the
workpiece.
7. Tighten each jaw in small increments. After adjusting
the first jaw, continue tightening in opposing sequence (see
Figure 19)
. Check frequently to make sure the required
point on the workpiece has not wandered away from the
spindle centerline due to applying too much pressure to a
single jaw.
Figure 19
8. After the workpiece is held in place, back the tailstock
away and rotate the chuck by hand. the center point will
move if the workpiece is out of center
(see Figure 20).
9. Make fine adjustments by slightly loosening one jaw and
tightening the opposing jaw until the workpiece is held
securely and precisely aligned with the spindle centerline.
Figure 20
Page 23
Instructions Manual for AL-346V (L555D)
01/09/2017
Содержание AL-346V
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Страница 39: ... 37 Operation and Work results Page 39 Instructions Manual for AL 346V L555D 01 09 2017 ...
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Страница 51: ... 49 GEAR BOX Page 51 Instructions Manual for AL 346V L555D 01 09 2017 ...
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Страница 55: ... 53 APRON Page 55 Instructions Manual for AL 346V L555D 01 09 2017 ...
Страница 58: ... 56 COMPOUND REST Page 58 Instructions Manual for AL 346V L555D 01 09 2017 ...
Страница 60: ... 58 SADDLE Page 60 Instructions Manual for AL 346V L555D 01 09 2017 ...
Страница 62: ... 60 TAILSTOCK Page 62 Instructions Manual for AL 346V L555D 01 09 2017 ...
Страница 65: ... 63 CONTROL SWITCH ASSEMBLY Page 65 Instructions Manual for AL 346V L555D 01 09 2017 ...
Страница 67: ... 65 BED AND DRIVE ASSEMBLY Page 67 Instructions Manual for AL 346V L555D 01 09 2017 ...
Страница 69: ... 67 STAND COOLANT PUMP LAMP Page 69 Instructions Manual for AL 346V L555D 01 09 2017 ...
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Страница 75: ... 73 STEADY REST Page 75 Instructions Manual for AL 346V L555D 01 09 2017 ...