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16 Diametral Pitch Ratings
14-1/2° and 20° Pressure Angle*
1/2" 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†◊ | .750 | .875 | 3/8" | 3/8" | 19/32" | 7/16" | Plain | ST-1611 | TST-1611 |
11† | .750 | .875 | 3/8" | 3/8" | 9/16" | 7/16" | Plain | ST-1611-B | TST-1611-B |
| 12◊ | .750 | .875 | 3/8" | 3/8" | 19/32" | 7/16" | Plain | ST-1612 | TST-1612 |
| 12 | .750 | .875 | 3/8" | 3/8" | 9/16" | 7/16" | Plain | ST-1612-B | TST-1612-B |
| 13 | .812 | .937 | 3/8" | 13/32" | 5/8" | 7/16" | Plain | ST-1613 | TST-1613 |
| 14◊ | .875 | 1.000 | 3/8" | 7/16" | 23/32" | 7/16" | Plain | ST-1614 | TST-1614 |
| 14 | .875 | 1.000 | 3/8" | 7/16" | 11/16" | 7/16" | Plain | ST-1614-B | TST-1614-B |
15 | .937 | 1.062 | 1/2" | 1/2" | 3/4" | 7/16" | Plain | ST-1615 | TST-1615 |
| 16 | 1.000 | 1.125 | 1/2" | 17/32" | 13/16" | 7/16" | Plain | ST-1616 | TST-1616 |
| 18 | 1.125 | 1.250 | 1/2" | 5/8" | 15/16" | 7/16" | Plain | ST-1618 | TST-1618 |
20 | 1.250 | 1.375 | 1/2" | 11/16" | 1-1/16" | 7/16" | Plain | ST-1620 | TST-1620 |
| 22 | 1.375 | 1.500 | 1/2" | 3/4" | 1-3/16" | 7/16" | Plain | ST-1622 | TST-1622 |
| 24◊ | 1.500 | 1.625 | 1/2" | 13/16" | 1-1/4" | 7/16" | Plain | ST-1624 | TST-1624 |
| 24 | 1.500 | 1.625 | 1/2" | 13/16" | 1-5/16" | 7/16" | Plain | ST-1624-B | TST-1624-B |
| 26 | 1.625 | 1.750 | 1/2" | 15/16" | 1-7/16" | 7/16" | Plain | ST-1626 | TST-1626 |
| 28 | 1.750 | 1.875 | 1/2" | 1" | 1-1/2" | 1/2" | Plain | ST-1628 | TST-1628 |
| 30 | 1.875 | 2.000 | 1/2" | 1-1/16" | 1-5/8" | 1/2" | Plain | ST-1630 | TST-1630 |
| 32 | 2.000 | 2.125 | 1/2" | 1-1/8" | 1-3/4" | 1/2" | Plain | ST-1632 | TST-1632 |
| 36◊ | 2.250 | 2.375 | 1/2" | 1-1/8" | 1-3/4" | 1/2" | Plain | ST-1636 | TST-1636 |
| 36 | 2.250 | 2.375 | 1/2" | 1-1/8" | 2" | 1/2" | Plain | ST-1636-B | TST-1636-B |
| 40 | 2.500 | 2.625 | 1/2" | 1-1/8" | 1-3/4" | 1/2" | Plain | ST-1640 | TST-1640 |
| 48 | 3.000 | 3.125 | 1/2" | 1-1/8" | 1-3/4" | 1/2" | Plain | ST-1648 | TST-1648 |
56 | 3.500 | 3.625 | 1/2" | 1-1/8" | 1-3/4" | 1/2" | Plain | ST-1656 | TST-1656 |
| 64 | 4.000 | 4.125 | 5/8" | 1-1/8" | 1-3/4" | 1/2" | Plain | ST-1664 | TST-1664 |
| 72 | 4.500 | 4.625 | 5/8" | 1-5/16" | 2" | 1/2" | Plain | ST-1672 | TST-1672 |
| 80 | 5.000 | 5.125 | 5/8" | 1-5/16" | 2" | 1/2" | Plain | ST-1680 | TST-1680 |
| 96 | 6.000 | 6.125 | 5/8" | 1-5/16" | 2" | 1/2" | Plain | ST-1696 | TST-1696 |
Cast Iron 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. | ||||||||
| 40 | 2.500 | 2.625 | 1/2" | 11/16" | 1-1/4" | 1/2" | Web | IS-1640 | TIS-1640 |
| 48 | 3.000 | 3.125 | 1/2" | 11/16" | 1-1/4" | 1/2" | Web | IS-1648 | TIS-1648 |
| 54 | 3.375 | 3.500 | 1/2" | 11/16" | 1-1/4" | 1/2" | Web | IS-1654 | TIS-1654 |
| 56 | 3.500 | 3.625 | 1/2" | 11/16" | 1-1/4" | 1/2" | Web | IS-1656 | TIS-1656 |
| 60 | 3.750 | 3.875 | 1/2" | 3/4" | 1-3/8" | 5/8" | Web | IS-1660 | TIS-1660 |
| 64 | 4.000 | 4.125 | 5/8" | 3/4" | 1-3/8" | 5/8" | Spoke | IS-1664 | TIS-1664 |
| 72 | 4.500 | 4.625 | 5/8" | 3/4" | 1-3/8" | 5/8" | Spoke | IS-1672 | TIS-1672 |
| 80 | 5.000 | 5.125 | 5/8" | 13/16" | 1-1/2" | 5/8" | Spoke | IS-1680 | TIS-1680 |
| 84 | 5.250 | 5.375 | 5/8" | 13/16" | 1-1/2" | 5/8" | Spoke | IS-1684 | TIS-1684 |
96 | 6.000 | 6.125 | 5/8" | 13/16" | 1-1/2" | 5/8" | Spoke | IS-1696 | TIS-1696 |
| 112 | 7.000 | 7.125 | 5/8" | 13/16" | 1-1/2" | 5/8" | Spoke | IS-16112 | TIS-16112 |
| 120◊ | 7.500 | 7.625 | 5/8" | 1" | 1-3/4" | 3/4" | Spoke | IS-16120 | TIS-16120 |
| 120 | 7.500 | 7.625 | 5/8" | 1" | 1-3/4" | 5/8" | Spoke | IS-16120-B | TIS-16120-B |
| 128◊ | 8.000 | 8.125 | 5/8" | 1" | 1-3/4" | 3/4" | Spoke | IS-16128 | TIS-16128 |
| 128 | 8.000 | 8.125 | 5/8" | 1" | 1-3/4" | 5/8" | Spoke | IS-16128-B | TIS-16128-B |
| 144 | 9.000 | 9.125 | 5/8" | 1" | 1-3/4" | 3/4" | Spoke | IS-16144 | TIS-16144 |
| 160 | 10.000 | 10.125 | 5/8" | 1-3/8" | 2-1/4" | 3/4" | Spoke | IS-16160 | TIS-16160 |
| 192 | 12.000 | 12.125 | 5/8" | 1-3/8" | 2-1/4" | 3/4" | Spoke | IS-16192 | TIS-16192 |
† Special Pitch Diameter.
◊ Obsolete Style - Available only from existing stock.
* 14-1/2° Pressure Angle will not operate with 20° Pressure Angle.
Note: Gears shown in shaded areas are available in Cast Iron or Steel.
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