Dimensions of Sprocket

Sprockets could be classified into conventional sprockets, HK sprockets and other sprockets.
one. Normal sprocket
Normal sprockets are ANSI sprockets which may be engaged with regular series roller chains. See P125 for dimensions.
You’ll find two types of tooth profiles: U-tooth and S-tooth.
two. HK sprocket
HK sprockets can be engaged with HK series roller chains, and individuals for single strand chains are identical to regular sprockets. Having said that, sprockets for numerous strand chains are various from normal sprockets in sprocket tooth profile.
3. Other sprockets
Other sprockets are intended according to your following calculation formulas to suit respective specialty chains.
The sprockets utilised for your following chains are the very same because the regular sprockets in tooth gap type, but unique in tooth thickness (sprocket tooth profile).
4. Calculation of sprocket dimensions
The dimensions of normal sprockets and other standard sprockets are calculated as follows. In the beginning, the diameters of sprockets are calculated through the following calculation formulas.
Next, sprocket tooth profile (the shape of the tooth according to its thickness) is calculated from the following calculation formulas. (The values shown while in the following pages had been calculated by these formulas and regarded as 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 fundamental dimensions of the sprocket appropriate for any chain pitch of one mm are respectively termed pitch diameter factor, tip diameter aspect and caliper diameter element. The respective things for respective numbers of teeth are listed under. If these factors are multiplied by chain pitch, the basic dimensions from the corresponding sprocket is often obtained.
Inside the situation of 80 (25.40 mm pitch) with 35 teeth Pitch diameter (Dp) = P×Pitch diameter factor
Calculation formulas for tooth gap varieties
Because the most rational tooth gap kinds during which the stress angle alterations in response for the elongation of a smoothly rotated roller chain using the lapse of service 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 common sprockets also have S-tooth profiles.