Spur Gears: 20 Diametral Pitch Ratings

14-1/2° and 20° Pressure Angle*

3/8″ 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† .600 .700 5/16″ 5/16″ 15/32″ 3/8″ Plain ST-2011 TST-2011
12 .600 .700 5/16″ 5/16″ 15/32″ 3/8″ Plain ST-2012 TST-2012
13◊ .650 .750 5/16″ 5/16″ 15/32″ 3/8″ Plain ST-2013 TST-2013
13 .650 .750 5/16″ 5/16″ 1/2″ 3/8″ Plain ST-2013-B TST-2013-B
14 .700 .800 5/16″ 5/16″ 9/16″ 3/8″ Plain ST-2014 TST-2014
15 .750 .850 3/8″ 7/16″ 39/64″ 3/8″ Plain ST-2015 TST-2015
16 .800 .900 3/8″ 7/16″ 21/32″ 3/8″ Plain ST-2016 TST-2016
18 .900 1.000 3/8″ 1/2″ 3/4″ 3/8″ Plain ST-2018 TST-2018
20◊ 1.000 1.100 3/8″ 1/2″ 13/16″ 3/8″ Plain ST-2020 TST-2020
20 1.000 1.100 3/8″ 1/2″ 55/64″ 3/8″ Plain ST-2020-B TST-2020-B
22◊ 1.100 1.200 3/8″ 9/16″ 15/16″ 3/8″ Plain ST-2022 TST-2022
22 1.100 1.200 3/8″ 9/16″ 31/32″ 3/8″ Plain ST-2022-B TST-2022-B
24◊ 1.200 1.300 3/8″ 9/16″ 1-1/32″ 3/8″ Plain ST-2024 TST-2024
24 1.200 1.300 3/8″ 9/16″ 1-1/16″ 3/8″ Plain ST-2024-B TST-2024-B
25◊ 1.250 1.350 3/8″ 5/8″ 1-1/16″ 3/8″ Plain ST-2025 TST-2025
25 1.250 1.350 3/8″ 5/8″ 1-7/64″ 3/8″ Plain ST-2025-B TST-2025-B
28◊ 1.400 1.500 3/8″ 3/4″ 1-1/4″ 3/8″ Plain ST-2028 TST-2028
28 1.400 1.500 3/8″ 3/4″ 1-17/64″ 3/8″ Plain ST-2028-B TST-2028-B
30◊ 1.500 1.600 3/8″ 3/4″ 1-1/4″ 3/8″ Plain ST-2030 TST-2030
30 1.500 1.600 3/8″ 3/4″ 1-23/64″ 3/8″ Plain ST-2030-B TST-2030-B
32◊ 1.600 1.700 3/8″ 3/4″ 1-1/4″ 1/2″ Plain ST-2032 TST-2032
32 1.600 1.700 3/8″ 3/4″ 1-7/16″ 1/2″ Plain ST-2032-B TST-2032-B
35◊ 1.750 1.850 3/8″ 7/8″ 1-3/8″ 1/2″ Plain ST-2035 TST-2035
35 1.750 1.850 3/8″ 7/8″ 1-9/16″ 1/2″ Plain ST-2035-B TST-2035-B
36◊ 1.800 1.900 3/8″ 7/8″ 1-3/8″ 1/2″ Plain ST-2036 TST-2036
36 1.800 1.900 3/8″ 7/8″ 1-5/8″ 1/2″ Plain ST-2036-B TST-2036-B
40◊ 2.000 2.100 3/8″ 7/8″ 1-3/8″ 1/2″ Plain ST-2040 TST-2040
40 2.000 2.100 3/8″ 7/8″ 1-13/16″ 1/2″ Plain ST-2040-B TST-2040-B
50~ 2.500 2.600 3/8″ 7/8″ 1-3/8″ 1/2″ Plain ST-2050 TST-2050
60~ 3.000 3.100 3/8″ 1-1/16″ 1-5/8″ 1/2″ Plain ST-2060 TST-2060
80~ 4.000 4.100 1/2″ 1-1/16″ 1-5/8″ 1/2″ Plain ST-2080 TST-2080

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.
48~ 2.400 2.500 3/8″ 1/2″ 1-1/8″ 1/2″ Web IS-2048 TIS-2048
50~ 2.500 2.600 3/8″ 1/2″ 1-1/8″ 1/2″ Web IS-2050 TIS-2050
60~ 3.000 3.100 3/8″ 1/2″ 1-1/8″ 1/2″ Web IS-2060 TIS-2060
64~ 3.200 3.300 3/8″ 1/2″ 1-1/8″ 1/2″ Web IS-2064 TIS-2064
70~ 3.500 3.600 3/8″ 9/16″ 1-1/4″ 1/2″ Web IS-2070 TIS-2070
72~ 3.600 3.700 3/8″ 9/16″ 1-1/4″ 1/2″ Web IS-2072 TIS-2072
80~ 4.000 4.100 1/2″ 9/16″ 1-1/4″ 1/2″ Web IS-2080 TIS-2080
84 4.200 4.300 1/2″ 9/16″ 1-1/4″ 1/2″ Web IS-2084 TIS-2084
90 4.500 4.600 1/2″ 9/16″ 1-1/4″ 1/2″ Spoke IS-2090 TIS-2090
96 4.800 4.900 1/2″ 9/16″ 1-1/4″ 1/2″ Spoke IS-2096 TIS-2096
100 5.000 5.100 1/2″ 3/4″ 1-1/2″ 1/2″ Spoke IS-20100 TIS-20100
112 5.600 5.700 1/2″ 3/4″ 1-1/2″ 1/2″ Spoke IS-20112 TIS-20112
120 6.000 6.100 1/2″ 3/4″ 1-1/2″ 1/2″ Spoke IS-20120 TIS-20120
140 7.000 7.100 1/2″ 13/16″ 1-5/8″ 1/2″ Spoke IS-20140 TIS-20140
144 7.200 7.300 1/2″ 13/16″ 1-5/8″ 1/2″ Spoke IS-20144 TIS-20144
160 8.000 8.100 1/2″ 13/16″ 1-5/8″ 5/8″ Spoke IS-20160 TIS-20160
180 9.000 9.100 1/2″ 7/8″ 1-3/4″ 5/8″ Spoke IS-20180 TIS-20180
200 10.000 10.100 1/2″ 7/8″ 1-3/4″ 5/8″ Spoke IS-20200 TIS-20200

† 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.