SJC-CC
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

cc sjc diagram

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.