Sprockets may be classified into regular sprockets, HK sprockets as well as other sprockets.
one. Normal sprocket
Standard sprockets are ANSI sprockets which may be engaged with common series roller chains. See P125 for dimensions.
You can find two varieties of tooth profiles: U-tooth and S-tooth.
two. HK sprocket
HK sprockets could be engaged with HK series roller chains, and those for single 
strand chains are identical to typical sprockets. Even so, sprockets for several strand chains are distinctive from common sprockets in sprocket tooth profile.
3. Other sprockets
Other sprockets are intended in accordance on the following calculation formulas to suit respective specialty chains.
The sprockets utilised for your following chains are the very same as the regular sprockets in tooth gap type, but various in tooth thickness (sprocket tooth profile).
four. Calculation of sprocket dimensions
The dimensions of regular sprockets along with other standard sprockets are calculated as follows. To start with, the diameters of sprockets are calculated from your following calculation formulas.
Up coming, sprocket tooth profile (the form with the tooth based on its thickness) is calculated from your following calculation formulas. (The values shown within the following pages were calculated by these formulas and regarded as the normal values.)
Calculation formulas for diameters and tooth gap kinds Calculation formulas for diameters
Calculation of pitch diameter, tip diameter and caliper diameter
The basic dimensions of a sprocket suitable to get a chain pitch of 1 mm are respectively termed pitch diameter aspect, tip diameter issue and caliper diameter factor. The respective aspects for respective numbers of teeth are listed below. If these factors are multiplied by chain pitch, the essential dimensions of your corresponding sprocket is usually obtained.
Illustration:
During the situation of 80 (25.forty mm pitch) with 35 teeth Pitch diameter (Dp) ＝ P×Pitch diameter issue
Calculation formulas for tooth gap forms
Because the most rational tooth gap types through which the strain angle improvements in response on the elongation of a smoothly rotated roller chain with all the lapse of services time, ANSI specify two types of tooth profiles: U-type and S-type. On the whole, S-type tooth profiles are adopted in accordance with ANSI, and our typical sprockets also have S-tooth profiles.
