Dimensions of Sprocket

Sprockets is often classified into regular sprockets, HK sprockets and various sprockets.
1. Standard sprocket
Standard sprockets are ANSI sprockets which could be engaged with regular series roller chains. See P125 for dimensions.
There are two styles of tooth profiles: U-tooth and S-tooth.
2. HK sprocket
HK sprockets could be engaged with HK series roller chains, and those for single strand chains are identical to standard sprockets. On the other hand, sprockets for several strand chains are different from normal sprockets in sprocket tooth profile.
three. Other sprockets
Other sprockets are built in accordance to your following calculation formulas to suit respective specialty chains.
The sprockets applied to the following chains are the same since the conventional sprockets in tooth gap form, but different in tooth thickness (sprocket tooth profile).
four. Calculation of sprocket dimensions
The dimensions of standard sprockets along with other basic sprockets are calculated as follows. In the beginning, the diameters of sprockets are calculated from your following calculation formulas.
Upcoming, sprocket tooth profile (the shape in the tooth dependant upon its thickness) is calculated from your following calculation formulas. (The values proven from the following pages had been calculated by these formulas and thought to be the standard 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 1 mm are respectively known as pitch diameter aspect, tip diameter aspect and caliper diameter factor. The respective things for respective numbers of teeth are listed below. If these variables are multiplied by chain pitch, the essential dimensions of your corresponding sprocket may be obtained.
Example:
Within the case of 80 (25.forty mm pitch) with 35 teeth Pitch diameter (Dp) ＝ P×Pitch diameter component
Calculation formulas for tooth gap varieties
Because the most rational tooth gap forms in which the stress angle changes in response to the elongation of a smoothly rotated roller chain with all the lapse of service time, ANSI specify two kinds of tooth profiles: U-type and S-type. In general, S-type tooth profiles are adopted in accordance with ANSI, and our typical sprockets also have S-tooth profiles.