Sprockets might be classified into normal sprockets, HK sprockets and also other sprockets.
one. Regular sprocket
Normal sprockets are ANSI sprockets which may be engaged with common series roller chains. See P125 for dimensions.
There are two styles of tooth profiles: U-tooth and S-tooth.
two. HK sprocket
HK sprockets might be engaged with HK series roller chains, and those for single strand chains are identical to regular sprockets. On the other hand, sprockets for various strand chains are diverse from regular sprockets in 
sprocket tooth profile.
3. Other sprockets
Other sprockets are developed according towards the following calculation formulas to suit respective specialty chains.
The sprockets made use of for the following chains are the identical as the standard sprockets in tooth gap type, but different in tooth thickness (sprocket tooth profile).
4. Calculation of sprocket dimensions
The dimensions of standard sprockets and also other general sprockets are calculated as follows. To start with, the diameters of sprockets are calculated from your following calculation formulas.
Subsequent, sprocket tooth profile (the shape in the tooth based on its thickness) is calculated from the following calculation formulas. (The values shown while in the following pages were calculated by these formulas and regarded as the conventional 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 the sprocket ideal to get a chain pitch of one mm are respectively referred to as pitch diameter component, tip diameter aspect and caliper diameter element. The respective elements for respective numbers of teeth are listed below. If these factors are multiplied by chain pitch, the fundamental dimensions in the corresponding sprocket is often obtained.
Instance:
From the situation of 80 (25.forty mm pitch) with 35 teeth Pitch diameter (Dp) ＝ P×Pitch diameter component
Calculation formulas for tooth gap types
As the most rational tooth gap kinds through which the strain angle modifications in response to the elongation of the smoothly rotated roller chain together with the lapse of services time, ANSI specify two forms of tooth profiles: U-type and S-type. In general, S-type tooth profiles are adopted in accordance with ANSI, and our standard sprockets also have S-tooth profiles.
