Sprockets can be classified into common sprockets, HK sprockets and other sprockets.
1. Regular sprocket
Common sprockets are ANSI sprockets which may be engaged with typical series roller chains. See P125 for dimensions.
You’ll find two sorts of tooth profiles: U-tooth and S-tooth.
two. HK sprocket
HK sprockets might be engaged with HK series roller chains, and 
people for single strand chains are identical to regular sprockets. Nonetheless, sprockets for a number of strand chains are unique from conventional sprockets in sprocket tooth profile.
3. Other sprockets
Other sprockets are developed in accordance to your following calculation formulas to suit respective specialty chains.
The sprockets employed to the following chains will be the same since the normal sprockets in tooth gap type, but distinct in tooth thickness (sprocket tooth profile).
4. Calculation of sprocket dimensions
The dimensions of normal sprockets as well as other common sprockets are calculated as follows. In the beginning, the diameters of sprockets are calculated through the following calculation formulas.
Subsequent, sprocket tooth profile (the shape on the tooth according to its thickness) is calculated in the following calculation formulas. (The values shown from the following pages were calculated by these formulas and thought to be the conventional values.)
Calculation formulas for diameters and tooth gap kinds Calculation formulas for diameters
Calculation of pitch diameter, tip diameter and caliper diameter
The basic dimensions of the sprocket appropriate for a chain pitch of one mm are respectively identified as pitch diameter element, tip diameter element and caliper diameter aspect. The respective elements for respective numbers of teeth are listed under. If these things are multiplied by chain pitch, the basic dimensions with the corresponding sprocket can be obtained.
Instance:
In the case of 80 (25.forty mm pitch) with 35 teeth Pitch diameter (Dp) ＝ P×Pitch diameter element
Calculation formulas for tooth gap types
As the most rational tooth gap kinds during which the pressure angle alterations in response to your elongation of a smoothly rotated roller chain together with the lapse of service time, ANSI specify two varieties of tooth profiles: U-type and S-type. Normally, S-type tooth profiles are adopted in accordance with ANSI, and our conventional sprockets also have S-tooth profiles.
