Sprockets is often classified into regular sprockets, HK sprockets along with other sprockets.
1. Typical sprocket
Common sprockets are ANSI sprockets which can be engaged with common series roller chains. See P125 for dimensions.
There are actually two styles of tooth profiles: U-tooth and S-tooth.
two. HK sprocket
HK sprockets is usually engaged with HK series roller chains, and these for single strand chains are identical to common sprockets. However, sprockets for many strand chains are distinctive from normal sprockets in sprocket tooth profile.
3. Other sprockets
Other sprockets are built in accordance for the following calculation formulas to suit respective 
specialty chains.
The sprockets made use of for the following chains are the similar because the typical sprockets in tooth gap kind, but unique in tooth thickness (sprocket tooth profile).
four. 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 in the following calculation formulas.
Subsequent, sprocket tooth profile (the form with the tooth determined by its thickness) is calculated from your following calculation formulas. (The values shown inside the following pages were calculated by these formulas and thought to be the common 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 ideal for any chain pitch of one mm are respectively named pitch diameter component, tip diameter aspect and caliper diameter aspect. The respective things for respective numbers of teeth are listed below. If these elements are multiplied by chain pitch, the essential dimensions from the corresponding sprocket is often obtained.
Example:
While in the case of 80 (25.forty mm pitch) with 35 teeth Pitch diameter (Dp) ＝ P×Pitch diameter component
Calculation formulas for tooth gap kinds
As the most rational tooth gap kinds in which the strain angle changes in response to the 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. In general, S-type tooth profiles are adopted in accordance with ANSI, and our standard sprockets also have S-tooth profiles.
