Dimensions of Sprocket

Sprockets might be classified into normal sprockets, HK sprockets and other sprockets.
one. Conventional sprocket
Conventional sprockets are ANSI sprockets which can be engaged with typical series roller chains. See P125 for dimensions.
There are actually two types of tooth profiles: U-tooth and S-tooth.
2. HK sprocket
HK sprockets is usually engaged with HK series roller chains, and people for single strand chains are identical to standard sprockets. Having said that, sprockets for various strand chains are unique from regular sprockets in sprocket tooth profile.
three. Other sprockets
Other sprockets are created according to the following calculation formulas to suit respective specialty chains.
The sprockets made use of for the following chains are the similar as the normal 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 common sprockets are calculated as follows. To start with, the diameters of sprockets are calculated from the following calculation formulas.
Following, sprocket tooth profile (the shape with the tooth depending on its thickness) is calculated in the following calculation formulas. (The values shown during the following pages have been calculated by these formulas and regarded as the standard values.)
Calculation formulas for diameters and tooth gap kinds 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 one mm are respectively called pitch diameter factor, tip diameter element and caliper diameter element. The respective components for respective numbers of teeth are listed below. If these components are multiplied by chain pitch, the fundamental dimensions with the corresponding sprocket may be obtained.
From the situation of 80 (25.forty mm pitch) with 35 teeth Pitch diameter (Dp) = P×Pitch diameter aspect
Calculation formulas for tooth gap types
As the most rational tooth gap forms by which the pressure angle improvements in response to the elongation of the smoothly rotated roller chain with the lapse of support time, ANSI specify two types of tooth profiles: U-type and S-type. Generally, S-type tooth profiles are adopted in accordance with ANSI, and our regular sprockets also have S-tooth profiles.


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