Spur Gears: 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.

~ Available in Cast Iron or Steel.