Sprockets can be classified into common sprockets, HK sprockets and various sprockets.
1. Typical sprocket
Standard sprockets are ANSI sprockets which could be engaged with typical series roller chains. See P125 for dimensions.
You’ll 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 individuals for single strand chains are identical to regular sprockets. Nevertheless, sprockets for numerous strand chains are distinctive from standard sprockets in sprocket tooth profile.
3. Other sprockets
Other sprockets are created in accordance for the following calculation formulas to suit respective specialty chains.
The sprockets employed for that following chains are the same since the normal sprockets in tooth gap type, but unique in tooth thickness (sprocket tooth profile).
4. Calculation of sprocket dimensions
The dimensions of normal sprockets together with other standard sprockets are calculated as follows. Initially, the diameters of sprockets are calculated from your following calculation formulas.
Subsequent, sprocket tooth profile (the shape on the tooth depending on its thickness) is calculated from the following calculation formulas. (The values proven within the following pages had been calculated by these formulas and regarded as 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 the sprocket appropriate for any chain pitch of one mm are respectively known as pitch diameter element, tip diameter factor and caliper diameter component. The respective things for respective numbers of teeth are listed below. If these aspects are multiplied by chain pitch, the essential dimensions of the corresponding sprocket is usually obtained.
Example:
Inside 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 forms by which the pressure angle alterations in response to your elongation of the smoothly rotated roller chain together with 
the lapse of support time, ANSI specify two kinds of tooth profiles: U-type and S-type. Normally, S-type tooth profiles are adopted in accordance with ANSI, and our common sprockets also have S-tooth profiles.
