Sprockets may be classified into common sprockets, HK sprockets and various sprockets.
1. Standard sprocket
Regular sprockets are ANSI sprockets which might be engaged with common series roller chains. See P125 for dimensions.
There are two kinds 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 normal sprockets. Nevertheless, sprockets for various strand chains are unique from typical 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 made use of for the following chains will be the very same since the typical sprockets in tooth gap kind, but unique in tooth thickness (sprocket tooth profile).
4. Calculation of sprocket dimensions
The dimensions of typical sprockets as well as other common sprockets are calculated as follows. At the outset, the diameters of sprockets are calculated from your following calculation formulas.
Next, sprocket tooth profile (the form with the tooth based upon its thickness) is calculated from the following calculation formulas. (The values proven during the following pages had been calculated by these formulas and thought to be the standard values.)
Calculation formulas for diameters and tooth gap types Calculation formulas for diameters
Calculation of pitch diameter, tip diameter and caliper diameter
The fundamental dimensions of a sprocket appropriate for a chain pitch of one mm are respectively termed pitch diameter factor, tip diameter component and caliper diameter component. The respective components for respective numbers of teeth are listed below. If these things are multiplied by chain pitch, the fundamental dimensions of the corresponding sprocket may be obtained.
Instance:
Inside the situation of 80 (25.forty mm pitch) with 35 teeth Pitch diameter (Dp) ＝ P×Pitch diameter component
Calculation formulas for tooth gap types
Because the most rational tooth gap kinds in which the stress angle modifications in response for the elongation of a smoothly rotated roller chain using the lapse of services 
time, ANSI specify two forms of tooth profiles: U-type and S-type. Normally, S-type tooth profiles are adopted in accordance with ANSI, and our regular sprockets also have S-tooth profiles.
