Sprockets may be classified into regular sprockets, HK sprockets along with other sprockets.
one. Typical sprocket
Normal sprockets are ANSI sprockets which may be engaged with standard series roller chains. See P125 for dimensions.
You will find two sorts 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 standard sprockets. However, sprockets for various strand chains are different from typical sprockets in sprocket tooth profile.
three. Other sprockets
Other sprockets are designed according to your following calculation formulas to suit respective specialty chains.
The sprockets made use of for the following chains are the same since the normal sprockets in tooth gap kind, but diverse in tooth thickness (sprocket tooth profile).
4. Calculation of sprocket dimensions
The dimensions of standard sprockets and various common sprockets are calculated as follows. At first, the diameters of sprockets are calculated through the following calculation formulas.
Subsequent, sprocket tooth profile (the shape of the tooth depending on its thickness) is calculated through the following calculation formulas. 
(The values proven inside the following pages had been calculated by these formulas and thought to be 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 basic dimensions of the sprocket suitable for a chain pitch of 1 mm are respectively called pitch diameter component, tip diameter aspect and caliper diameter aspect. The respective variables for respective numbers of teeth are listed beneath. If these variables are multiplied by chain pitch, the essential dimensions on the corresponding sprocket is often obtained.
Example:
Within the situation of 80 (25.forty mm pitch) with 35 teeth Pitch diameter (Dp) ＝ P×Pitch diameter issue
Calculation formulas for tooth gap forms
Since the most rational tooth gap types during which the stress angle adjustments in response to your elongation of a smoothly rotated roller chain together with the lapse of services time, ANSI specify two kinds of tooth profiles: U-type and S-type. Generally, S-type tooth profiles are adopted in accordance with ANSI, and our regular sprockets also have S-tooth profiles.
