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| Center Type | Standard Spindle Diameter (A) | Max Thrust Load to Bottom Spring | Max Spring Travel | Overall Length (P) | Gage Line to Point (K*) | Spindle Point to Housing (B) | Max Workpiece Weight Capacity in Lbs. | Max RPM |
|---|---|---|---|---|---|---|---|---|
| II | .378 | 173 | 3/32 | 3.95 | 1.380 | .880 | 274 | 3000 |
| III | .558 | 235 | 1/8 | 4.95 | 1.690 | 1.160 | 400 | 3000 |
| IV | .686 | 780 | 5/32 | 6.29 | 2.380 | 1.380 | 960 | 2000 |
| V | 1.075 | 1088 | 3/16 | 8.02 | 2.880 | 2.000 | 1450 | 1500 |
| VI | 1.509 | 2183 | 3/16 | 11.00 | 3.630 | 2.812 | 2500 | 1500 |
* K: Gage line to point typical for Morse Tapers.
Special lubricating grease required for Concentric centers:
14.5 oz. tube, part no. 17991
Heavy duty grease gun, part no. 17990
Low profile grease gun nozzle – # Z737, part no. 17993