Sprockets can be classified into normal sprockets, HK sprockets and various sprockets.
1. Typical sprocket
Regular sprockets are ANSI sprockets which could be engaged with standard series roller chains. See P125 for dimensions.
There are actually two kinds 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 regular sprockets. Nonetheless, sprockets for numerous strand chains are diverse from conventional sprockets in sprocket tooth profile.
3. Other sprockets
Other sprockets are developed according for the following calculation formulas to suit respective specialty chains.
The sprockets made use of for that following chains would be the identical as the regular sprockets in tooth gap type, but unique in tooth thickness (sprocket tooth profile).
four. Calculation of sprocket dimensions
The dimensions of standard sprockets and other general sprockets are calculated as follows. At first, the diameters of sprockets are calculated from the following calculation formulas.
Upcoming, sprocket tooth profile (the form of the tooth according to its thickness) is calculated through the following calculation formulas. (The values proven within the following pages were calculated by these formulas and regarded as the conventional values.)
Calculation formulas for diameters and tooth gap types Calculation formulas for diameters
Calculation of pitch diameter, tip diameter and caliper diameter
The essential dimensions of the sprocket appropriate for a chain pitch of one mm are respectively referred to as pitch diameter factor, tip diameter component and caliper diameter aspect. 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 could be obtained.
Instance:
From the case of 80 (25.forty mm pitch) with 35 teeth Pitch diameter (Dp) ＝ P×Pitch diameter aspect
Calculation formulas for tooth gap varieties
As 
the most rational tooth gap types in which the pressure angle improvements in response towards the elongation of a smoothly rotated roller chain with all the lapse of services time, ANSI specify two varieties of tooth profiles: U-type and S-type. On the whole, S-type tooth profiles are adopted in accordance with ANSI, and our common sprockets also have S-tooth profiles.
