AMERICAN GEARS TYPES AND SIZES OF GEARS

 
 Gear Type Diametral Pitch Pitch Diameter Face Width 
 (DP) (PD) 
 Max Min Max Min Min
Spur Gears-Hobbed 12 200 6 .125 10 
Spur Gears-Shaped
 External 6/8 180 7 .125 2.5
 Internal 6/8 180 6 .625 2.5
Helical Gears-Hobbed 12 180 6 .125 6 (up to 45 degrees Helix)
Worms-Hobbed, Milled 10 96 2 .187 4
or Rolled
(Single, Double, Triple
& Quadruple Threads)
Worm Gears-Throated or 12 96 6 .187 To Suit
Straight Face or Mult. 12
Sector/Segment Gears 16 180 8 10
Timing Pulleys 1/2 1/8 6 .375 10
Sprockets 6 .625
 1/4
 3/8
 1/2
Ladder Chain Sprockets 6 .625
 .185
 .286
 .353
 .353
Ratchets 6 .500
(Tooth form based on customer requirements)
Racks-Milled 20 120
(Up to 3 inch length. Circular Pitch: .196 Max .026 Min)
Straight Tooth Bevel 16 96 3 1/8 7/16
Gears 
(Gleason Coniflex)
Face Gears 3 1/4
(Tooth form based on customer requirements)
Splines and Serrations 16/32 64/128 6 1/8 10
Shafts For FHP motors up to 1 HP

American Gears...

• are within inches of you everywhere.
• and more gears.
• equipment and facilities to produce the finest gears.
• for every industry and application.
• meet the most exacting tolerances and specifications.
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Copyright (c) 1996 Thomas Publishing Company