Sprockets may be classified into common sprockets, HK sprockets and other sprockets.
1. Common sprocket
Typical sprockets are ANSI sprockets which could be engaged with normal series roller chains. See P125 for dimensions.
There are actually two varieties of tooth profiles: U-tooth and S-tooth.
two. HK sprocket
HK sprockets may be engaged with HK series roller chains, and people for single strand chains are identical to regular sprockets. Nonetheless, sprockets for several strand chains are unique from normal sprockets in sprocket tooth profile.
three. Other sprockets
Other sprockets are made in accordance to your following calculation formulas to suit respective specialty chains.
The sprockets applied for that following chains are the very same since the typical sprockets in tooth gap kind, but distinct in tooth thickness (sprocket tooth profile).
4. Calculation of sprocket dimensions
The dimensions of conventional sprockets and various basic sprockets are calculated as follows. To start with, the diameters of sprockets are calculated from the following calculation formulas.
Next, sprocket tooth profile (the form on the tooth dependant upon its thickness) is calculated from your following calculation formulas. (The values shown 
while in the following pages were 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 fundamental dimensions of a sprocket ideal to get a chain pitch of one mm are respectively referred to as pitch diameter component, tip diameter element and caliper diameter factor. The respective things for respective numbers of teeth are listed beneath. If these aspects are multiplied by chain pitch, the essential dimensions on the corresponding sprocket could be obtained.
Illustration:
During the situation of 80 (25.forty mm pitch) with 35 teeth Pitch diameter (Dp) ＝ P×Pitch diameter aspect
Calculation formulas for tooth gap types
Since the most rational tooth gap forms by which the strain angle changes in response on the elongation of a smoothly rotated roller chain with all the lapse of support time, ANSI specify two varieties of tooth profiles: U-type and S-type. Normally, S-type tooth profiles are adopted in accordance with ANSI, and our normal sprockets also have S-tooth profiles.
