Sprockets may be classified into typical sprockets, HK sprockets along with other sprockets.
one. Typical sprocket
Common sprockets are ANSI sprockets which could be engaged with regular 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 is often engaged with HK series roller chains, and these for single strand chains are identical to regular sprockets. On the other hand, sprockets for many strand chains are distinct from common sprockets in sprocket tooth profile.
three. Other sprockets
Other sprockets are designed in accordance for the following calculation formulas to suit respective specialty chains.
The sprockets employed for your following chains would be the identical as the regular sprockets in tooth gap type, but unique in tooth thickness (sprocket tooth profile).
4. Calculation of sprocket dimensions
The dimensions of regular sprockets and also other common sprockets are calculated as follows. In the beginning, the diameters of sprockets are calculated in the following calculation formulas. 
Following, sprocket tooth profile (the shape of your tooth based upon its thickness) is calculated from your following calculation formulas. (The values shown from the following pages had been calculated by these formulas and regarded as the common values.)
Calculation formulas for diameters and tooth gap varieties Calculation formulas for diameters
Calculation of pitch diameter, tip diameter and caliper diameter
The fundamental dimensions of a sprocket suitable for a chain pitch of one mm are respectively termed pitch diameter factor, tip diameter issue and caliper diameter factor. The respective variables for respective numbers of teeth are listed below. If these aspects are multiplied by chain pitch, the essential dimensions in the corresponding sprocket could be obtained.
Example:
While in the situation of 80 (25.40 mm pitch) with 35 teeth Pitch diameter (Dp) ＝ P×Pitch diameter issue
Calculation formulas for tooth gap varieties
As the most rational tooth gap varieties in which the stress angle adjustments in response to your elongation of the smoothly rotated roller chain with the lapse of services time, ANSI specify two kinds 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.
