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Dimensions of Sprocket

Sprockets may be classified into standard sprockets, HK sprockets together with other sprockets.
1. Typical sprocket
Typical sprockets are ANSI sprockets which may be engaged with conventional 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 might be engaged with HK series roller chains, and those for single strand chains are identical to regular sprockets. However, sprockets for several strand chains are distinct from conventional sprockets in sprocket tooth profile.
3. Other sprockets
Other sprockets are intended in accordance for the following calculation formulas to suit respective specialty chains.
The sprockets applied for the following chains would be the very same because the typical sprockets in tooth gap form, but different in tooth thickness (sprocket tooth profile).
four. Calculation of sprocket dimensions
The dimensions of typical sprockets as well as other basic sprockets are calculated as follows. At the outset, the diameters of sprockets are calculated through the following calculation formulas.
Following, sprocket tooth profile (the shape on the tooth dependant upon 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 conventional values.)
Calculation formulas for diameters and tooth gap forms Calculation formulas for diameters
Calculation of pitch diameter, tip diameter and caliper diameter
The basic dimensions of a sprocket appropriate to get a chain pitch of 1 mm are respectively termed pitch diameter aspect, tip diameter factor and caliper diameter issue. The respective aspects for respective numbers of teeth are listed beneath. If these things are multiplied by chain pitch, the fundamental dimensions in the corresponding sprocket is often obtained.
Inside the situation of 80 (25.40 mm pitch) with 35 teeth Pitch diameter (Dp) = P×Pitch diameter factor
Calculation formulas for tooth gap kinds
Since the most rational tooth gap forms during which the strain angle adjustments in response to the elongation of a smoothly rotated roller chain together with the lapse of services time, ANSI specify two varieties of tooth profiles: U-type and S-type. Normally, S-type tooth profiles are adopted in accordance with ANSI, and our typical sprockets also have S-tooth profiles.


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