Spur Gears: 5 Diametral Pitch Ratings

14-1/2° and 20° Pressure Angle*

1-3/4″ 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†◊ 2.400 2.800 1-1/16″ 1-5/15″ 1-13/16″ 7/8″ Plain ST-511 TST-511
11† 2.400 2.800 1-1/16″ 1-5/16″ 1-25/32″ 7/8″ Plain ST-511-B TST-511-B
12◊ 2.400 2.800 1-1/16″ 1-5/16″ 1-13/16″ 7/8″ Plain ST-512 TST-512
12 2.400 2.800 1-1/16″ 1-5/16″ 1-25/32″ 7/8″ Plain ST-512-B TST-512-B
13 2.600 3.000 1-1/16″ 1-5/16″ 2″ 7/8″ Plain ST-513 TST-513
14◊ 2.800 3.200 1-1/16″ 1-9/16″ 2-1/4″ 7/8″ Plain ST-514 TST-514
14 2.800 3.200 1-1/16″ 1-9/16″ 2-3/16″ 7/8″ Plain ST-514-B TST-514-B
15◊ 3.000 3.400 1-1/16″ 1-3/4″ 2-7/16″ 7/8″ Plain ST-515 TST-515
15 3.000 3.400 1-1/16″ 1-3/4″ 2-3/8″ 7/8″ Plain ST-515-B TST-515-B
16◊ 3.200 3.600 1-1/16″ 1-7/8″ 2-5/8″ 7/8″ Plain ST-516 TST-516
16 3.200 3.600 1-1/16″ 1-7/8″ 2-19/32″ 7/8″ Plain ST-516-B TST-516-B
18 3.600 4.000 1-1/16″ 2-1/8″ 3″ 7/8″ Plain ST-518 TST-518
20 4.000 4.400 1-1/16″ 2-3/8″ 3-3/8″ 7/8″ Plain ST-520 TST-520

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 4.800 5.200 1-1/16″ 2-1/8″ 3-1/4″ 1-1/4″ Plain IS-524 TIS-524
25 5.000 5.400 1-1/16″ 2-1/8″ 3-1/4″ 1-1/4″ Plain IS-525 TIS-525
28 5.600 6.000 1-1/16″ 2-1/8″ 3-1/4″ 1-1/4″ Web IS-528 TIS-528
30 6.000 6.400 1-1/16″ 2-1/8″ 3-1/4″ 1-1/4″ Web IS-530 TIS-530
32 6.400 6.800 1-1/16″ 2-1/8″ 3-1/4″ 1-1/4″ Web IS-532 TIS-532
35 7.000 7.400 1-3/16″ 2-1/8″ 3-1/4″ 1-1/4″ Web IS-535 TIS-535
36 7.200 7.600 1-3/16″ 2-1/8″ 3-1/4″ 1-1/4″ Web IS-536 TIS-536
40 8.000 8.400 1-3/16″ 2-1/8″ 3-1/4″ 1-1/4″ Web IS-540 TIS-540
45 9.000 9.400 1-3/16″ 2-5/16″ 3-1/2″ 1-1/4″ Web IS-545 TIS-545
48 9.600 10.000 1-3/16″ 2-5/16″ 3-1/2″ 1-1/4″ Web IS-548 TIS-548
50 10.000 10.400 1-3/16″ 2-5/16″ 3-1/2″ 1-1/4″ Web IS-550 TIS-550
54 10.800 11.200 1-3/16″ 2-5/16″ 3-1/2″ 1-1/4″ Spoke IS-554 TIS-554
55 11.000 11.400 1-3/16″ 2-5/16″ 3-1/2″ 1-1/4″ Spoke IS-555 TIS-555
60 12.000 12.400 1-3/16″ 2-1/2″ 3-3/4″ 1-1/4″ Spoke IS-560 TIS-560
64 12.800 13.200 1-3/16″ 2-1/2″ 3-3/4″ 1-1/4″ Spoke IS-564 TIS-564
70 14.000 14.400 1-3/16″ 2-1/2″ 3-3/4″ 1-1/4″ Spoke IS-570 TIS-570
72 14.400 14.800 1-3/16″ 2-1/2″ 3-3/4″ 1-1/4″ Spoke IS-572 TIS-572
80 16.000 16.400 1-3/16″ 2-1/2″ 3-3/4″ 1-1/4″ Spoke IS-580 TIS-580
90 18.000 18.400 1-3/16″ 2-1/2″ 3-3/4″ 1-1/4″ Spoke IS-590 TIS-590
96 19.200 19.600 1-3/16″ 2-1/2″ 3-3/4″ 1-1/4″ Spoke IS-596 TIS-596
100 20.000 20.400 1-5/16″ 2-1/2″ 3-3/4″ 1-1/2″ Spoke IS-5100 TIS-5100
108 21.600 22.000 1-5/16″ 2-5/8″ 4″ 1-1/2″ Spoke IS-5108 TIS-5108
110 22.000 22.400 1-5/16″ 2-5/8″ 4″ 1-1/2″ Spoke IS-5110 TIS-5110
120 24.000 24.400 1-5/16″ 2-5/8″ 4″ 1-1/2″ Spoke IS-5120 TIS-5120

† Special Pitch Diameter.

◊ Obsolete Style – Available only from existing stock.

* 14-1/2° Pressure Angle will not operate with 20° Pressure Angle.