Used to counteract the negative effect of centrifugal force to accommodate high speed applications.
- Standard Counter Centrifigual sizes up to 18” (457.2 mm). Larger sizes available upon request.
- Reduced jaw force loss at high rpm’s up to 5,700 rpm.
- 3-Jaw design with 2-Jaw available upon request.
- Large thru-hole designs for Bar Feed applications.
- .001 guaranteed repeatability with properly bored top Jaws or Master Jaw Inserts.
- Universal mounting for your specific machine spindle.
- Collet pad design available.
Features:
- Master Slides – Master Slides come standard with American Standard square type serrations. Also available are American Tongue and Groove, Inch (1/16 x 90deg) and Metric (1.5mm x 60deg) “V” type serrations.
- Jaw Travel – Increased jaw travel enhances part loading and tolerance variations.
- Top Jaws – Blank top jaws available to suit Master Slides. Customer can insert a stress plug into the collet pad and turn blanks to suit specific part configurations. Special designed top jaws for roughing and finishing operations are also available upon request.
- Design Interface – Directly interfaces with many competitors Sliding Jaw Chucks.
- Counter Centrifugal – Centrifugal force is compensated by a one piece constructed counterbalance. This improves differential High-Low pressure chucking.
Technical Spcifications
| Model | SJC-09000 | SJC-10000 | SJC-13000 | SJC-16000 | SJC-18000 |
|---|---|---|---|---|---|
| Size | 8.75 | 10 | 12.75 | 15.75 | 18 |
| Spindle nose | 6A2 | 6A2 | 8A2 | 11A2 | 11A2 |
| A Diameter | 8.75 | 10 | 12.75 | 15.75 | 18 |
| B Height | 4.91 | 5.44 | 6 | 6.5 | 6.69 |
| C Bore | 2.06 | 2.75 | 3.38 | 4.81 | 4.81 |
| D Bolt Circle | 5.25 | 5.25 | 6.75 | 9.25 | 9.25 |
| E Thread | 2-3/4 x 12 | 3 1/8 x 12 | 4 1/8 x 12 | 5 1/4 x12 | 5 1/4 x 12 |
| F Max (open)/Min (closed) | 1.47 / .94 | 1.56 / 1.09 | 1.56 / 81 | 1.78 / .87 | 1.96 / .84 |
| G Diameter max | 2 | 2.56 | 3.03 | 4.63 | 4.63 |
| H Distance | 1.44 | 1.75 | 1.75 | 2.5 | 2.5 |
| J Thread | 1/2-13 | 1/2-13 | 5/8-11 | 3/4-10 | 3/4-10 |
| K Width | .745/.744 | .995/.994 | .995/.994 | 1.487/1.486 | 1.487/1.486 |
| L Bolt size | 1/4-20 x 3/4 | 5/16-18 x 3/4 | 5/16-18 x 3/4 | 3/8-16 x 3/4 | 3/8-16 x 3/4 |
| Travel per jaw | 0.25 | 0.28 | 0.3 | 0.4 | 0.4 |
| *Maximum RPM | 5,700 | 4,200 | 3,700 | 3,200 | 2,700 |
| Approx. weight (lbs) | 60 | 90 | 127 | 190 | 285 |
| *3-jaw max. drawbar force (lbsf) | 11,000 | 16,000 | 20,000 | 26,000 | 28,000 |
| 3-jaw static grip (lb/sf) per jaw W/top jaws at max. drawbar force |
6,000 | 8,400 | 11,600 | 14,000 | 16,300 |
| 3-jaw static grip (lb/sf) per jaw W/collet pads at max. drawbar force |
8,000 | 9,800 | 13,600 | 20,000 | 23,500 |
Note: Master slides are American Standard square serrations.
Each 3-jaw chuck is supplied with (3) jaw nuts, (3) master keys, (3) key screws, (6) spindle screws, and (3) master jaw screws.
*Operating RPM, drawbar force, and top jaw configuration are contingent on each other. Consult Ultra-Grip engineering for appropriate top jaw weight.