Spur Gears: 8 Diametral Pitch Ratings

14-1/2° and 20° Pressure Angle*

1/4″ Face

Stell 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†◊ 1.500 1.750 3/4″ 3/4″ 1-5/32″ 3/4″ Plain ST-811 TST-811
11† 1.500 1.750 3/4″ 3/4″ 1-1/8″ 3/4″ Plain ST-811-B TST-811-B
12◊ 1.500 1.750 3/4″ 3/4″ 1-5/32″ 3/4″ Plain ST-812 TST-812
12 1.500 1.750 3/4″ 3/4″ 1-1/8″ 3/4″ Plain ST-812-B TST-812-B
14◊ 1.750 2.000 3/4″ 7/8″ 1-11/32″ 3/4″ Plain ST-814 TST-814
14 1.750 2.000 3/4″ 7/8″ 1-3/8″ 3/4″ Plain ST-814-B TST-814-B
15 1.875 2.125 7/8″ 1″ 1-1/2″ 3/4″ Plain ST-815 TST-815
16 2.000 2.250 7/8″ 1-1/16″ 1-5/8″ 3/4″ Plain ST-816 TST-816
18 2.250 2.500 7/8″ 1-1/4″ 1-7/8″ 3/4″ Plain ST-818 TST-818
20 2.500 2.750 7/8″ 1-7/16″ 2-1/8″ 3/4″ Plain ST-820 TST-820
22◊ 2.750 3.000 7/8″ 1-9/16″ 2-5/16″ 3/4″ Plain ST-822 TST-822
22 2.750 3.000 7/8″ 1-9/16″ 2-3/8″ 3/4″ Plain ST-822-B TST-822-B
24~ 3.000 3.250 7/8″ 1-3/4″ 2-5/8″ 3/4″ Plain ST-824 TST-824
28~ 3.500 3.750 7/8″ 1-3/4″ 2-5/8″ 7/8″ Plain ST-828 TST-828
32~ 4.000 4.250 1″ 1-15/16″ 2-7/8″ 7/8″ Plain ST-832 TST-832
36~ 4.500 4.750 1″ 2″ 3″ 7/8″ Plain ST-836 TST-836
40~ 5.000 5.250 1″ 2″ 3″ 7/8″ Plain ST-840 TST-840
44~ 5.500 5.750 1″ 2″ 3″ 7/8″ Plain ST-844 TST-844
48~ 6.000 6.250 1″ 2″ 3″ 7/8″ Plain ST-848 TST-848

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.
24~ 3.000 3.250 7/8″ 1-3/16″ 2-1/8″ 1″ Plain IS-824 TIS-824
28~ 3.500 3.750 7/8″ 1-1/4″ 2-1/4″ 1″ Plain IS-828 TIS-828
30~ 3.750 4.000 7/8″ 1-1/4″ 2-1/4″ 1″ Web IS-830 TIS-830
32~ 4.000 4.250 1″ 1-1/4″ 2-1/4″ 1″ Web IS-832 TIS-832
36~ 4.500 4.750 1″ 1-7/16″ 2-1/2″ 1″ Web IS-836 TIS-836
40~ 5.000 5.250 1″ 1-7/16″ 2-1/2″ 1″ Web IS-840 TIS-840
42~ 5.250 5.500 1″ 1-7/16″ 2-1/2″ 1″ Web IS-842 TIS-842
44~ 5.500 5.750 1″ 1-7/16″ 2-1/2″ 1″ Web IS-844 TIS-844
48~ 6.000 6.250 1″ 1-7/16″ 2-1/2″ 1″ Web IS-848 TIS-848
54 6.750 7.000 1″ 1-7/16″ 2-1/2″ 1″ Spoke IS-854 TIS-854
56 7.000 7.250 1″ 1-7/16″ 2-1/2″ 1″ Spoke IS-856 TIS-856
60 7.500 7.750 1″ 1-7/16″ 2-1/2″ 1″ Spoke IS-860 TIS-860
64 8.000 8.250 1″ 1-7/16″ 2-1/2″ 1″ Spoke IS-864 TIS-864
72 9.000 9.250 1″ 1-7/16″ 2-1/2″ 1″ Spoke IS-872 TIS-872
80 10.000 10.250 1-1/8″ 1-3/4″ 3″ 1-1/8″ Spoke IS-880 TIS-880
84 10.500 10.750 1-1/8″ 1-3/4″ 3″ 1-1/8″ Spoke IS-884 TIS-884
88 11.000 11.250 1-1/8″ 1-3/4″ 3″ 1-1/8″ Spoke IS-888 TIS-888
96 12.000 12.250 1-1/8″ 1-3/4″ 3″ 1-1/8″ Spoke IS-896 TIS-896
112 14.000 14.250 1-1/8″ 1-3/4″ 3″ 1-1/8″ Spoke IS-8112 TIS-8112
120 15.000 15.250 1-1/8″ 1-3/4″ 3″ 1-1/8″ Spoke IS-8120 TIS-8120
128 16.000 16.250 1-1/8″ 1-3/4″ 3″ 1-1/8″ Spoke IS-8128 TIS-8128
144 18.000 18.250 1-1/8″ 1-3/4″ 3″ 1-1/8″ Spoke IS-8144 TIS-8144
160 20.000 20.250 1-1/8″ 1-7/8″ 3-1/4″ 1-1/4″ Spoke IS-8160 TIS-8160

† 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.