Sprockets might be classified into regular sprockets, HK sprockets and also other sprockets.
one. Common sprocket
Typical sprockets are ANSI sprockets which can be engaged with normal series roller chains. See P125 for dimensions.
You can find two sorts of tooth profiles: U-tooth and S-tooth.
two. HK sprocket
HK sprockets may be engaged with HK series roller chains, and those for single strand chains are identical to typical sprockets. On the other hand, sprockets for several strand chains are distinct from typical sprockets in sprocket tooth profile.
three. Other sprockets
Other sprockets are intended according towards the following calculation formulas to suit respective specialty chains.
The sprockets utilized for your following chains would be the same as the normal sprockets in tooth gap kind, but various in tooth thickness (sprocket tooth profile).
4. Calculation of sprocket dimensions
The dimensions of normal sprockets as well as other common sprockets are calculated as follows. At first, the diameters of sprockets are calculated from your following calculation formulas.
Subsequent, sprocket tooth profile (the form with the tooth according to its thickness) is calculated from the following calculation formulas. (The values proven inside the following pages were calculated by these formulas and regarded as the typical values.)
Calculation formulas for diameters and tooth gap types Calculation formulas for diameters
Calculation 
of pitch diameter, tip diameter and caliper diameter
The fundamental dimensions of a sprocket suitable to get a chain pitch of one mm are respectively called pitch diameter element, tip diameter component and caliper diameter element. The respective factors for respective numbers of teeth are listed beneath. If these variables are multiplied by chain pitch, the fundamental dimensions from the corresponding sprocket may be obtained.
Instance:
While in the situation of 80 (25.forty mm pitch) with 35 teeth Pitch diameter (Dp) ＝ P×Pitch diameter component
Calculation formulas for tooth gap varieties
Since the most rational tooth gap forms by which the stress angle improvements in response to your elongation of a smoothly rotated roller chain with all the lapse of service time, ANSI specify two forms of tooth profiles: U-type and S-type. In general, S-type tooth profiles are adopted in accordance with ANSI, and our common sprockets also have S-tooth profiles.
