Sprockets is usually classified into regular sprockets, HK sprockets and various sprockets.
1. Normal 
sprocket
Common sprockets are ANSI sprockets which may be engaged with conventional 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 individuals for single strand chains are identical to common sprockets. On the other hand, sprockets for numerous strand chains are unique from normal sprockets in sprocket tooth profile.
three. Other sprockets
Other sprockets are built in accordance on the following calculation formulas to suit respective specialty chains.
The sprockets utilized for that following chains would be the same as the typical sprockets in tooth gap form, but distinctive in tooth thickness (sprocket tooth profile).
four. Calculation of sprocket dimensions
The dimensions of standard sprockets as well as other standard sprockets are calculated as follows. At the outset, the diameters of sprockets are calculated from your following calculation formulas.
Up coming, sprocket tooth profile (the form in the tooth dependant upon its thickness) is calculated through the following calculation formulas. (The values proven during the following pages had been calculated by these formulas and thought to be the regular values.)
Calculation formulas for diameters and tooth gap varieties Calculation formulas for diameters
Calculation of pitch diameter, tip diameter and caliper diameter
The essential dimensions of the sprocket suitable for a chain pitch of one mm are respectively termed pitch diameter element, tip diameter element and caliper diameter element. The respective components for respective numbers of teeth are listed under. If these factors are multiplied by chain pitch, the fundamental dimensions in the corresponding sprocket might be obtained.
Illustration:
From the case of 80 (25.forty mm pitch) with 35 teeth Pitch diameter (Dp) ＝ P×Pitch diameter component
Calculation formulas for tooth gap types
Since the most rational tooth gap kinds by which the pressure angle changes in response towards the elongation of a smoothly rotated roller chain using the lapse of support time, ANSI specify two sorts of tooth profiles: U-type and S-type. Usually, S-type tooth profiles are adopted in accordance with ANSI, and our common sprockets also have S-tooth profiles.
