Sprockets might be classified into conventional sprockets, HK sprockets and also other sprockets.
one. Normal sprocket
Typical sprockets are ANSI sprockets which may be engaged with common series roller chains. See P125 for dimensions.
You’ll find two forms of tooth profiles: U-tooth and S-tooth.
2. HK sprocket
HK sprockets is usually engaged with HK series roller chains, and individuals for single strand chains are identical to typical sprockets. Having said that, sprockets for various strand chains are different from normal sprockets in sprocket tooth profile.
three. Other sprockets
Other sprockets are intended in accordance to the following calculation formulas to suit respective specialty chains.
The sprockets employed for your following chains will be the similar because the typical sprockets in tooth gap form, but various in tooth thickness (sprocket tooth profile).
4. Calculation of sprocket dimensions
The dimensions of common sprockets and also other basic sprockets are calculated as follows. In the beginning, the diameters of sprockets are calculated from your following calculation formulas.
Subsequent, sprocket tooth profile (the shape on the tooth based upon its thickness) is calculated in the following calculation formulas. (The values shown from the following pages had been calculated by these formulas and thought to be the normal 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 any chain pitch of 1 mm are respectively termed pitch diameter issue, tip diameter element and caliper diameter issue. The respective things for respective numbers of teeth are listed beneath. If these variables are multiplied by chain pitch, the fundamental dimensions in the corresponding sprocket is usually obtained.
Example:
Within the situation of 80 (25.40 mm pitch) with 35 teeth Pitch diameter (Dp) ＝ P×Pitch diameter component
Calculation formulas for tooth gap types
Because the most rational tooth gap varieties during which the stress angle adjustments in response to your elongation of the smoothly rotated roller chain with the lapse of support time, ANSI specify two types of tooth profiles: U-type and S-type. Generally, S-type tooth profiles are adopted in accordance with ANSI, and our standard sprockets also have S-tooth profiles.