Sprockets can be classified into common sprockets, HK sprockets and other sprockets.
1. Conventional sprocket
Normal sprockets are ANSI sprockets which might be engaged with common series roller chains. See P125 for dimensions.
There are actually two sorts of tooth profiles: U-tooth and S-tooth. 
2. HK sprocket
HK sprockets is often engaged with HK series roller chains, and people for single strand chains are identical to standard sprockets. Having said that, sprockets for numerous strand chains are diverse from typical sprockets in sprocket tooth profile.
three. Other sprockets
Other sprockets are built according for the following calculation formulas to suit respective specialty chains.
The sprockets employed for the following chains are the very same since the regular sprockets in tooth gap type, but various in tooth thickness (sprocket tooth profile).
four. Calculation of sprocket dimensions
The dimensions of typical sprockets together with other basic sprockets are calculated as follows. To start with, the diameters of sprockets are calculated in the following calculation formulas.
Following, sprocket tooth profile (the form of the tooth dependant upon its thickness) is calculated from your following calculation formulas. (The values proven from the following pages have been calculated by these formulas and thought to be the standard 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 ideal to get a chain pitch of one mm are respectively identified as pitch diameter issue, tip diameter component and caliper diameter factor. The respective components for respective numbers of teeth are listed under. If these variables are multiplied by chain pitch, the fundamental dimensions of the corresponding sprocket may be obtained.
Instance:
During the case of 80 (25.forty mm pitch) with 35 teeth Pitch diameter (Dp) ＝ P×Pitch diameter element
Calculation formulas for tooth gap varieties
Since the most rational tooth gap varieties during which the stress angle improvements in response to your elongation of a smoothly rotated roller chain with 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 normal sprockets also have S-tooth profiles.
