LOCKRING – SELF BROACHING
| PART NUMBER | A DIA ±.0005 | B DIA +.0010 -.0000 | C ±.03 |
| RC12-128 | .1275 | .1870 | 2.38 |
| RC16-128 | .1275 | .2500 | 2.38 |
| RC16-157 | .1565 | .2500 | 2.38 |
| RC18-157 | .1565 | .2810 | .2.38 |
| RC18-185 | .1845 | .2810 | 2.38 |
| RC21-213 | .2125 | .3280 | 2.56 |
| RC23-185 | .1845 | .3590 | 2.69 |
| RC23-242 | .2415 | .3590 | 2.69 |
| RC24-190 | .1895 | .3750 | 2.69 |
| RC24-257 | .2565 | .3750 | 2.69 |
| RC27-213 | .2125 | .4210 | 2.88 |
| RC27-281 | .2805 | .4210 | 2.88 |
| RC28-190 | .1895 | .4370 | 2.88 |
| RC28-250 | .2495 | .4370 | 2.88 |
| RC28-312 | .3115 | .4370 | 2.88 |
| RC31-242 | .2415 | .4840 | 3.19 |
| RC31-359 | .3585 | .4840 | 3.19 |
| RC33-250 | .2495 | .5150 | 3.44 |
| RC33-281 | .2805 | .5150 | 3.44 |
| RC33-312 | .3115 | .5150 | 3.44 |
| RC33-368 | .3675 | .5150 | 3.44 |
| RC33-386 | .3855 | .5150 | 3.44 |
| RC38-312 | .3115 | .5930 | 3.56 |
| RC38-375 | .3745 | .5930 | 3.56 |
| RC38-422 | .4215 | .5930 | 3.56 |
| RC38-453 | .4525 | .5930 | 3.56 |
| RC43-375 | .3745 | .6710 | 3.75 |
| RC43-437 | .4365 | .6710 | 3.75 |
| RC47-359 | .3585 | .7335 | 3.75 |
| RC47-422 | .4215 | .7340 | 3.75 |
| RC47-437 | .4365 | .7340 | 3.75 |
| RC47-506 | .5055 | .7340 | 3.75 |
| PART NUMBER | A DIA .0010 ±.0005 | B DIA -.0000 | C ±.03 |
| RC47-535 | .5345 | .7340 | 3.75 |
| RC47-569 | .5685 | .7340 | 3.75 |
| RC51-569 | .5685 | .7970 | 4.12 |
| RC56-506 | .5055 | .8750 | 4.12 |
| RC56-569 | .5685 | .8750 | 4.12 |
| RC56-625 | .6245 | .8750 | 4.12 |
| RC56-656 | .6555 | .8750 | 4.12 |
| RC56-687 | .6865 | .8750 | 4.12 |
| RC64-569 | .5685 | 1.0000 | 4.12 |
| RC64-625 | .6245 | 1.0000 | 4.12 |
| RC64-688 | .9875 | 1.0000 | 4.12 |
| RC64-750 | .7495 | 1.0000 | 4.12 |
| RC64-765 | .7645 | 1.0000 | 4.12 |
| RC72-625 | .6245 | 1.1250 | 4.38 |
| RC72-688 | .6875 | 1.1250 | 4.38 |
| RC72-813 | .8125 | 1.1250 | 4.38 |
| RC72-875 | .8745 | 1.1250 | 4.38 |
| RC72-927 | .9265 | 1.1250 | 4.38 |
| RC82-750 | .7495 | 1.2810 | 4.50 |
| RC82-813 | .8125 | 1.2810 | 4.50 |
| RC82-938 | .9375 | 1.2810 | 4.50 |
| RC82-1000 | .9995 | 1.2810 | 4.50 |
| RC90-813 | .8125 | 1.4060 | 4.75 |
| RC90-875 | .8745 | 1.4060 | 4.75 |
| RC90-938 | .9375 | 1.4060 | 4.75 |
| RC90-1094 | 1.0935 | 1.4060 | 4.75 |
| RC90-1125 | 1.1245 | 1.4060 | 4.75 |
| RC100-938 | .9375 | 1.5620 | 4.75 |
| RC100-1000 | .9995 | 1.5620 | 4.75 |
| RC100-1094 | 4.0935 | 4.5620 | 4.75 |
| RC124-1094 | 1.0935 | 1.9370 | 4.75 |
| RC124-1125 | 1.1245 | 1.9370 | 4.75 |
NOTES: UNLESS OTHERWISE SPECIFIED
1. MATERIAL: High speed steel.
MS51991 VS ROSAN INSERTS, MS51990 VS ROSAN LOCKRINGS
| PART NUMBER | A DIA ±.0005 | B DIA [7] | C ±.005 | D ±.250 |
| RCD16-128 | .1280 | .250 | .312 | 4.000 |
| RCD16-157 | .1570 | .250 | .312 | 4.000 |
| RCD18-157 | .1570 | .281 | .375 | 4.250 |
| RCD18-185 | .1850 | .281 | .375 | 4.250 |
| RCD21-213 | .2130 | .328 | .437 | 4.620 |
| RCD23-185 | .1850 | .359 | .500 | 4.880 |
| RCD23-242 | .2420 | .359 | .500 | 4.880 |
| RCD24-190 | .1900 | .375 | .500 | 5.000 |
| RCD27-213 | .2130 | .421 | .562 | 5.380 |
| RCD27-281 | .2810 | .421 | .562 | 5.380 |
| RCD28-250 | .2500 | .437 | .562 | 5.500 |
| RCD31-242 | .2420 | .484 | .625 | 5.880 |
| RCD31-359 | .3590 | .484 | .625 | 5.880 |
| RCD33-281 | .2810 | .515 | .625 | 3.880 |
| RCD33-312 | .3120 | .515 | .625 | 3.880 |
| RCD33-386 | .3860 | .515 | .625 | 3.880 |
| RCD38-422 | .4220 | .593 | .687 | 4.120 |
| RCD38-453 | .4530 | .593 | .687 | 4.120 |
| RCD43-437 | .4370 | .671 | .750 | 4.620 |
| RCD47-359 | .3590 | .734 | .750 | 5.000 |
| RCD47-422 | .4220 | .734 | .750 | 5.000 |
| RCD47-506 | .5060 | .734 | .750 | 5.000 |
| PART NUMBER | A DIA ±.0005 | B DIA [7] | C ±.005 | D ±.250 |
| RCD47-569 | .5690 | .734 | .750 | 5.000 |
| RCD51-569 | .5690 | .797 | .812 | 5.250 |
| RCD56-506 | .5060 | .875 | .812 | 5.500 |
| RCD56-569 | .5690 | .875 | .812 | 5.500 |
| RCD56-625 | .6250 | .875 | .812 | 5.500 |
| RCD56-687 | .6870 | .875 | .812 | 5.500 |
| RCD64-325 | .6250 | 1.000 | .937 | 6.000 |
| RCD64-688 | .6880 | 1.000 | .937 | 6.000 |
| RCD64-750 | .7500 | 1.000 | .937 | 6.000 |
| RCD72-625 | .6250 | 1.125 | 1.062 | 6.380 |
| RCD72-688 | .6880 | 1.125 | 1.062 | 6.380 |
| RCD72-813 | .8130 | 1.125 | 1.062 | 6.380 |
| RCD72-875 | .8750 | 1.125 | 1.062 | 6.380 |
| RCD72927 | .9270 | 1.125 | 1.062 | 6.380 |
| RCD82-813 | .8130 | 1.281 | 1.187 | 7.000 |
| RCD82-938 | .9380 | 1.281 | 1.187 | 7.000 |
| RCD82-1000 | 1.0000 | 1.281 | 1.187 | 7.000 |
| RCD90-813 | .8130 | 1.406 | 1.312 | 7.380 |
| RCD90-1094 | 1.0940 | 1.406 | 4.312 | 7.380 |
| RCD90-1125 | 1.1250 | 1.406 | 1.312 | 7.380 |
| RCD100-938 | .9380 | 1.562 | 1.437 | 7.750 |
| RCD124-1094 | 1.0940 | 1.937 | 1.875 | 8.500 |
NOTES:UNLESS OTHERWISE SPECIFIED
1. MATERIAL: High speed steel.
[2] Conical point optional.
3. HEAT TREAT:Per drill manufacturer’s standard.
4. FINISH: Strippable plastic coat to pretect cutting edg Tube packaging optional.
5. Made from standard straight shank jobbers or screw machine twist drills.
[6] Configuration applicable only for part number RCD72-625 thru RCD124-1094. [7] For drill
tolerances, see ANSI B94.11M.
8. CAUTION: Step drills are designed for thru hole When used to drill ablind
hole, it may be necessary to grind the drill to suit the depth required.