Dimensions of Sprocket

Sprockets could be classified into standard sprockets, HK sprockets and also other sprockets.
1. Regular sprocket
Standard sprockets are ANSI sprockets which may be engaged with regular series roller chains. See P125 for dimensions.
There are two kinds of tooth profiles: U-tooth and S-tooth.
2. HK sprocket
HK sprockets may be engaged with HK series roller chains, and those for single strand chains are identical to conventional sprockets. Even so, sprockets for numerous strand chains are diverse from conventional 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 made use of for your following chains are the same as the normal sprockets in tooth gap form, but unique in tooth thickness (sprocket tooth profile).
4. Calculation of sprocket dimensions
The dimensions of common sprockets together with other basic sprockets are calculated as follows. At the outset, the diameters of sprockets are calculated through the following calculation formulas.
Subsequent, sprocket tooth profile (the form with the tooth based upon its thickness) is calculated from the following calculation formulas. (The values proven while in the following pages have been calculated by these formulas and regarded as the common values.)
Calculation formulas for diameters and tooth gap varieties Calculation formulas for diameters
Calculation of pitch diameter, tip diameter and caliper diameter
The essential dimensions of the sprocket suitable to get a chain pitch of 1 mm are respectively referred to as pitch diameter element, tip diameter factor and caliper diameter factor. The respective elements for respective numbers of teeth are listed under. If these factors are multiplied by chain pitch, the basic dimensions from the corresponding sprocket could be obtained.
Within the situation of 80 (25.40 mm pitch) with 35 teeth Pitch diameter (Dp) = P×Pitch diameter component
Calculation formulas for tooth gap kinds
As the most rational tooth gap types during which the pressure angle modifications in response on the elongation of the smoothly rotated roller chain with the lapse of services time, ANSI specify two kinds of tooth profiles: U-type and S-type. Usually, S-type tooth profiles are adopted in accordance with ANSI, and our normal sprockets also have S-tooth profiles.


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