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| MACHINE MODEL | ISO# | PAD CAPACITY | ||
| NATIONAL ACME | ISO# | RD | HEX | SQ |
| 1 1/4" R, RA-6, R, RD-6, RD-8G, GA-4 | 49 | 1 1/4 | 1 1/16 | 7/8 |
| 1 5/8" R, RA, RAS-4, RB, RB-6, RB-8, GA-4 | 50 | 1 5/8 | 1 13/32 | 1 5/32 |
| 2" R, RA, RAS-4, RAS, RB-6 | 53 | 2 | 1 23/32 | 1 13/32 |
| 2 5/8" R, RA, RB-6, RB-8, M | 54 | 2 5/8 | 2 1/4 | 1 27/32 |
| 3 1/2 RA, RB-4, RB-6, M | 52 | 3 1/2 | 3 | 2 7/16 |
| 4" RB-6, RB-8 | 45 | 4 | 3 1/2 | 2 7/8 |
| 4 3/4 RB, RA-4, M | 56 | 4 3/4 | 4 | 3 3/8 |
| CLEVELAND | ISO# | RD | HEX | SQ |
| 2 1/5" DI | 54 | 2 5/8 | 2 1/4 | 1 27/32 |
| 3" DI | 51 | 3 | 2 9/16 | 2 1/8 |
| 3 1/2" DI | 52 | 3 1/2 | 3 | 2 7/16 |
| CONE | ISO# | RD | HEX | SQ |
| 1 1/4 | 49 | 1 1/4 | 1 1/16 | 7/8 |
| 1 5/8 | 50 | 1 5/8 | 1 13/16 | 1 5/32 |
| 2 | 2 | 1 23/32 | 1 13/32 | |
| 2 1/4 | 43 | 2 1/4 | 1 15/16 | 1 19/32 |
| 2 1/2 & 2 5/8 | 54 | 2 5/8 | 2 1/4 | 1 27/32 |
| 3 & 3 1/8 | 51 | 3 | 2 9/16 | 2 1/8 |
| 3 1/2 | 52 | 3 1/2 | 3 | 2 7/16 |
| 4 | 45 | 4 | 3 1/2 | 2 7/8 |
| 4 1/4 - 6 | 46 | 4 1/4 | 3 5/8 | 3 |
| 4 3/4 OBSOLETE | 56 | 4 3/4 | 4 | 3 3/8 |
| 5 | 5 | 4 5/16 | 3 1/2 | |
| 5 1/4 | 5 1/8 | 4 1/2 | 3 5/8 | |
| 6 4 & 6 | 6 | 5 1/8 | 4 1/4 | |
| GREENLEE | ISO# | RD | HEX | SQ |
| 2-6 SPINDLE | 53 | 2 | 1 23/32 | 1 13/32 |
| NEW BRITAIN | ISO# | RD | HEX | SQ |
| 1 1/4 | 49 | 1 1/4 | 1 1/16 | 7/8 |
| 1 5/8 | 50 | 1 5/8 | 1 13/32 | 1 5/32 |
| 2 | 53 | 2 | 1 21/32 | 1 13/32 |
| 2 1/4 | 47 | 2 1/4 | 1 15/16 | 1 19/32 |
| 2 5/8 | 54 | 2 5/8 | 2 1/4 | 1 27/32 |
| 3 1/2 | 52 | 3 1/2 | 3 | 2 7/16 |
| PRATT AND WHITNEY | ISO# | RD | HEX | SQ |
| 3 1/2 | 52 | 3 1/2 | 3 | 2 7/16 |
| WARNER AND SWASEY | ISO# | RD | HEX | SQ |
| 1 1/4-6 SPINDLE M-300 | 49 | 1 1/4 | 1 1/16 | 7/8 |
| 1 3/4-5 SPINDLE M-2500 | 55 | 1 3/4 | 1 17/32 | 1 1/4 |
| 2 1/4-5 SPINDLE M-2530 | 57 | 2 1/4 | 1 15/16 | 1 19/32 |
| O AB M-4415 (1 1/4) | 49 | 1 1/4 | 1 1/16 | 7/8 |
| 1 AB M-3880 (2") | 57 | 2 1/4 | 1 15/16 | 1 19/32 |
| 2 AB M-3380 M-3925 (3" CAP) | 51 | 3 | 2 9/16 | 2 1/8 |
| 2 AB M-3380 (471-2 1/2" CAP) | 08 | 2 1/2 | 2 3/16 | 1 3/4 |
| 3 AB M-3995 (4 1/2) | 5 | 4 5/16 | 3 1/2 | |
| SC-15 M-4820 (3 1/2) | 54 | 2 5/8 | 2 1/4 | 1 27/32 |
| SC-15 M-4820-2 (4") | 45 | 4 | 3 1/2 | 2 7/8 |
| 1 SC 5014-1006 (2")5034-1001 (2 1/4) | 57 | 2 1/4 | 1 15/16 | 1 19/32 |
| 1 SC 5054-1003 (3") | 51 | 3 | 2 9/16 | 2 1/8 |
| 2SCL 5094-1004 (4 1/2") | 56 | 4 3/4 | 4 | 3 3/8 |
| WICKMAN | ISO# | RD | HEX | SQ |
| 1 3/4 | 55 | 1 3/4 | 1 17/32 | 1 1/4 |
| 2" 4 & 6 SPINDLE | 53 | 2 | 1 23/32 | 1 13/32 |
| 2 1/4" 5 SPINDLE | 57 | 2 1/4 | 1 15/16 | 1 19/16 |
| 2 1/4" 6 SPINDLE | 48 | 2 1/4 | 1 15/16 | 1 19/32 |
| 2 5/8 (ALTERED) | 54 | 2 5/8 | 2 1/8 | 1 27/32 |
| 3 1/2 | 52 | 3 1/2 | 3 | 2 7/8 |
| 4 1/8 | 45 | 4 | 3 1/2 | 2 7/8 |