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24 Diametral Pitch Ratings
14-1/2° and 20° Pressure Angle*
1/4" Face
Steel Spur Gears with Hubs
| Number of Teeth | Pitch Diameter | Outside Diameter | Stock Bore | Maximum Bore | Hub Diameter | Hub Projection | Style | Catalog Number | |
| 14-1/2° P.A. | 20° P.A. | ||||||||
| 11† | .500 | .583 | 1/4" | 1/4" | 3/8" | 5/16" | Plain | ST-2411 | TST-2411 |
| 12 | .500 | .583 | 1/4" | 1/4" | 25/64" | 5/16" | Plain | ST-2412 | TST-2412 |
| 14 | .583 | .666 | 1/4" | 5/16" | 15/32" | 5/16" | Plain | ST-2414 | TST-2414 |
| 15 | .625 | .708 | 1/4" | 11/32" | 1/2" | 5/16" | Plain | ST-2415 | TST-2415 |
| 16◊ | .666 | .750 | 5/16" | 3/8" | 9/16" | 5/16" | Plain | ST-2416 | TST-2416 |
| 16 | .666 | .750 | 5/16" | 3/8" | 35/64" | 5/16" | Plain | ST-2416-B | TST-2416-B |
| 18 | .750 | .833 | 5/16" | 7/16" | 5/8" | 5/16" | Plain | ST-2418 | TST-2418 |
| 20◊ | .833 | .916 | 3/8" | 1/2" | 23/32" | 5/16" | Plain | ST-2420 | TST-2420 |
| 20 | .833 | .916 | 5/16" | 1/2" | 23/32" | 5/16" | Plain | ST-2420-B | TST-2420-B |
| 21 | .875 | .958 | 3/8" | 17/32" | 3/4" | 5/16" | Plain | ST-2421 | TST-2421 |
| 24 | 1.000 | 1.083 | 3/8" | 5/8" | 7/8" | 3/8" | Plain | ST-2424 | TST-2424 |
| 30 | 1.250 | 1.333 | 3/8" | 11/16" | 1" | 3/8" | Plain | ST-2430 | TST-2430 |
| 36 | 1.500 | 1.583 | 3/8" | 25/32" | 1-1/8" | 3/8" | Plain | ST-2436 | TST-2436 |
| 42 | 1.750 | 1.833 | 3/8" | 25/32" | 1-1/8" | 3/8" | Plain | ST-2442 | TST-2442 |
| 48 | 2.000 | 2.083 | 3/8" | 7/8" | 1-1/4" | 3/8" | Plain | ST-2448 | TST-2448 |
| 60 | 2.500 | 2.583 | 3/8" | 7/8" | 1-1/4" | 3/8" | Plain | ST-2460 | TST-2460 |
| 72 | 3.000 | 3.083 | 1/2" | 15/16" | 1-3/8" | 1/2" | Plain | ST-2472 | TST-2472 |
† Special Pitch Diameter.
◊ Obsolete Style - Available only from existing stock.
* 14-1/2° Pressure Angle will not operate with 20° Pressure Angle.
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