Sprockets can be classified into regular sprockets, HK sprockets as well as other sprockets.
one. Regular sprocket
Common sprockets are ANSI sprockets which may be engaged with common series roller chains. See P125 for dimensions.
You can find two sorts of tooth profiles: U-tooth and S-tooth.
two. HK sprocket
HK sprockets can be engaged with HK series roller chains, and these for single 
strand chains are identical to common sprockets. Even so, sprockets for many strand chains are various from standard sprockets in sprocket tooth profile.
three. Other sprockets
Other sprockets are intended according for the following calculation formulas to suit respective specialty chains.
The sprockets applied for that following chains will be the exact same as the regular sprockets in tooth gap form, but distinct in tooth thickness (sprocket tooth profile).
4. Calculation of sprocket dimensions
The dimensions of regular sprockets along with other basic sprockets are calculated as follows. At first, the diameters of sprockets are calculated from the following calculation formulas.
Up coming, sprocket tooth profile (the shape in the tooth based on its thickness) is calculated from your following calculation formulas. (The values shown from the following pages have been calculated by these formulas and regarded as the regular values.)
Calculation formulas for diameters and tooth gap kinds Calculation formulas for diameters
Calculation of pitch diameter, tip diameter and caliper diameter
The fundamental dimensions of a sprocket appropriate for any chain pitch of 1 mm are respectively referred to as pitch diameter factor, tip diameter factor and caliper diameter issue. The respective components for respective numbers of teeth are listed below. If these variables are multiplied by chain pitch, the essential dimensions on the corresponding sprocket can be obtained.
Instance:
While in the case of 80 (25.40 mm pitch) with 35 teeth Pitch diameter (Dp) ＝ P×Pitch diameter aspect
Calculation formulas for tooth gap kinds
Because the most rational tooth gap varieties during which the strain angle improvements in response to your elongation of a smoothly rotated roller chain using the lapse of services time, ANSI specify two sorts of tooth profiles: U-type and S-type. Usually, S-type tooth profiles are adopted in accordance with ANSI, and our standard sprockets also have S-tooth profiles.
