Dimensions of Sprocket

Sprockets is usually classified into standard sprockets, HK sprockets as well as other sprockets.
one. Common sprocket
Standard sprockets are ANSI sprockets which can be engaged with typical series roller chains. See P125 for dimensions.
There are actually two kinds of tooth profiles: U-tooth and S-tooth.
2. HK sprocket
HK sprockets may be engaged with HK series roller chains, and people for single strand chains are identical to typical sprockets. On the other hand, sprockets for many strand chains are unique from common sprockets in sprocket tooth profile.
three. Other sprockets
Other sprockets are intended according on the following calculation formulas to suit respective specialty chains.
The sprockets utilised for that following chains will be the very same because the standard sprockets in tooth gap type, but various in tooth thickness (sprocket tooth profile).
4. Calculation of sprocket dimensions
The dimensions of conventional sprockets and also other general sprockets are calculated as follows. At the outset, the diameters of sprockets are calculated from your following calculation formulas.
Upcoming, sprocket tooth profile (the shape with the tooth determined by its thickness) is calculated from your following calculation formulas. (The values proven in 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 essential dimensions of a sprocket ideal for a chain pitch of one mm are respectively identified as pitch diameter issue, tip diameter component and caliper diameter component. The respective aspects for respective numbers of teeth are listed below. If these elements are multiplied by chain pitch, the fundamental dimensions from the corresponding sprocket might be obtained.
During the case of 80 (25.40 mm pitch) with 35 teeth Pitch diameter (Dp) = P×Pitch diameter element
Calculation formulas for tooth gap varieties
Because the most rational tooth gap forms by which the pressure angle modifications in response for the elongation of the smoothly rotated roller chain with all the lapse of service time, ANSI specify two types of tooth profiles: U-type and S-type. In general, S-type tooth profiles are adopted in accordance with ANSI, and our standard sprockets also have S-tooth profiles.


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