Sprockets could be classified into regular sprockets, HK sprockets along with other sprockets.
one. Conventional sprocket
Standard sprockets are ANSI sprockets which might be engaged with conventional series roller chains. See P125 for dimensions.
There are actually two kinds of tooth profiles: U-tooth and S-tooth.
2. HK sprocket
HK sprockets could be engaged with HK series roller chains, and those for single strand chains are identical to typical sprockets. Having said that, sprockets for various strand chains are diverse from regular sprockets in sprocket tooth profile.
3. Other sprockets
Other sprockets are made according towards the following calculation formulas to suit respective specialty chains.
The sprockets utilised for your following chains are the identical since the conventional sprockets in tooth gap type, but diverse in tooth thickness (sprocket tooth profile).
four. Calculation of sprocket dimensions
The dimensions of normal sprockets together with other common sprockets are calculated as follows. At the outset, the diameters of sprockets are calculated from the following calculation formulas.
Following, sprocket tooth profile (the shape in the tooth based on its thickness) is calculated from your following calculation formulas. (The values shown from the following pages had been calculated by these formulas and thought to be the typical values.)
Calculation formulas for diameters and tooth gap kinds Calculation formulas for diameters
Calculation of pitch diameter, tip 
diameter and caliper diameter
The essential dimensions of a sprocket appropriate to get a chain pitch of one mm are respectively termed pitch diameter aspect, tip diameter aspect and caliper diameter issue. The respective components for respective numbers of teeth are listed beneath. If these variables are multiplied by chain pitch, the essential dimensions of the corresponding sprocket is usually obtained.
Instance:
Inside the case of 80 (25.40 mm pitch) with 35 teeth Pitch diameter (Dp) ＝ P×Pitch diameter element
Calculation formulas for tooth gap forms
As the most rational tooth gap types through which the pressure angle modifications in response for the elongation of a smoothly rotated roller chain using the lapse of service time, ANSI specify two forms of tooth profiles: U-type and S-type. Generally, S-type tooth profiles are adopted in accordance with ANSI, and our conventional sprockets also have S-tooth profiles.
