Sprockets might be classified into normal sprockets, HK sprockets together with other sprockets.
1. Conventional sprocket
Typical sprockets are ANSI sprockets which may be engaged with normal series roller chains. See P125 for dimensions.
You will discover two kinds 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 regular sprockets. Even so, sprockets for numerous strand chains are different from common sprockets in sprocket tooth profile.
three. Other sprockets
Other sprockets are built according to the following calculation formulas to suit respective specialty chains.
The sprockets employed for the following chains are the very same as the normal sprockets in tooth gap type, but unique in tooth thickness (sprocket tooth profile).
four. Calculation of sprocket dimensions
The dimensions of standard sprockets and also other general sprockets are calculated as follows. At the outset, the diameters of sprockets are calculated through the following calculation formulas.
Next, sprocket tooth profile (the shape on the tooth depending on its thickness) is calculated through the following calculation formulas. (The values proven inside the following pages were calculated by these formulas and thought to be the conventional values.)
Calculation formulas for diameters and tooth gap kinds Calculation formulas for diameters
Calculation of pitch diameter, tip diameter and caliper diameter
The essential dimensions of a sprocket suitable for a chain pitch of one mm are respectively identified as pitch diameter issue, tip diameter issue and caliper diameter component. The respective elements for respective numbers of teeth are listed beneath. If these variables are multiplied by chain pitch, the basic dimensions in the corresponding sprocket could be obtained.
Illustration:
From the situation of 80 (25.forty mm pitch) with 35 teeth Pitch diameter (Dp) ＝ P×Pitch diameter 
factor
Calculation formulas for tooth gap types
As the most rational tooth gap varieties during which the strain angle changes in response on the elongation of the smoothly rotated roller chain together with the lapse of support time, ANSI specify two varieties 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.