Sprockets may be classified into common sprockets, HK sprockets together with other sprockets.
one. Regular sprocket
Standard sprockets are ANSI sprockets which can be engaged with standard series roller chains. See P125 for dimensions.
You will find two styles of tooth profiles: U-tooth and S-tooth.
2. HK sprocket
HK sprockets may be engaged with HK series roller chains, and these for single strand chains are identical to standard sprockets. Having said that, sprockets for numerous strand chains are different from standard sprockets in sprocket tooth profile.
3. Other sprockets
Other sprockets are created according on the following calculation formulas to suit respective specialty chains.
The sprockets utilised for the following chains are the identical as the standard sprockets in tooth gap form, but diverse in tooth thickness (sprocket tooth profile).
4. Calculation of sprocket dimensions
The dimensions of regular sprockets and various standard 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 with the tooth according to its thickness) is calculated through the following calculation formulas. (The values shown inside the following pages were calculated by these formulas and regarded as 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 basic dimensions of the sprocket appropriate to get a chain pitch of one mm are respectively identified as pitch diameter component, tip diameter aspect and caliper diameter aspect. The respective components for respective numbers of teeth are listed under. If these things are multiplied by chain pitch, the fundamental dimensions of your corresponding sprocket might be obtained.
Illustration:
Inside the situation of 80 (25.forty mm pitch) with 35 teeth Pitch diameter (Dp) = P×Pitch diameter factor
Calculation formulas for tooth gap varieties
Because the most rational tooth gap types by which the stress angle adjustments in response towards the elongation of a smoothly rotated roller chain with the lapse of support 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 normal sprockets also have S-tooth profiles.