Sprockets is usually classified into common sprockets, HK sprockets and also other sprockets.
1. Regular sprocket
Common sprockets are ANSI sprockets which could be engaged with common series roller chains. See P125 for dimensions.
You will find two types of tooth profiles: U-tooth and S-tooth.
2. HK sprocket
HK sprockets can be engaged with HK series roller chains, and those for single strand chains are identical to conventional sprockets. However, sprockets for numerous strand chains are diverse from standard sprockets in sprocket tooth profile.
3. Other sprockets
Other sprockets are developed according to the following calculation formulas to suit respective specialty chains.
The sprockets used for your following chains are the very same because the regular sprockets in tooth gap form, but distinct in tooth thickness (sprocket tooth profile).
4. Calculation of sprocket dimensions
The dimensions of standard sprockets along with other basic sprockets are calculated as follows. Initially, the diameters of sprockets are calculated from the following calculation formulas.
Upcoming, sprocket tooth profile (the form in the tooth dependant upon its thickness) is calculated through the following calculation formulas. (The values shown from the following pages had been calculated by these formulas and thought to be the regular values.)
Calculation formulas for diameters and tooth gap types Calculation formulas for diameters
Calculation of pitch diameter, tip diameter and caliper diameter
The basic dimensions of a sprocket suitable to get a chain pitch of 1 mm are respectively identified as pitch diameter element, tip diameter issue and caliper diameter issue. The respective components for respective numbers of teeth are listed under. If these elements are multiplied by chain pitch, the basic dimensions with the corresponding sprocket is often obtained.
Illustration:
Inside the situation of 80 (25.forty mm pitch) with 35 teeth Pitch diameter (Dp) ＝ P×Pitch diameter component
Calculation formulas for tooth gap types
Because the most rational tooth gap varieties in which the strain angle adjustments in response for the elongation of a smoothly rotated roller chain using the lapse of services 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 regular sprockets also have S-tooth profiles.