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December 30, 2020

Sprockets can be classified into common sprockets, HK sprockets together with other sprockets.
one. Standard sprocket
Conventional sprockets are ANSI sprockets which may be engaged with conventional series roller chains. See P125 for dimensions.
You will find two kinds of tooth profiles: U-tooth and S-tooth.
2. HK sprocket
HK sprockets may be engaged with HK series roller chains, and individuals for single strand chains are identical to conventional sprockets. Nonetheless, sprockets for multiple strand chains are various from typical sprockets in sprocket tooth profile.
three. Other sprockets
Other sprockets are developed according to your following calculation formulas to suit respective specialty chains.
The sprockets utilized for your following chains would be the exact same since the standard sprockets in tooth gap form, but different in tooth thickness (sprocket tooth profile).
4. Calculation of sprocket dimensions
The dimensions of common sprockets together with other standard sprockets are calculated as follows. In the beginning, the diameters of sprockets are calculated from your following calculation formulas.
Following, sprocket tooth profile (the shape of the tooth depending on its thickness) is calculated through the following calculation formulas. (The values shown from the following pages had been 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 fundamental dimensions of the sprocket suitable for a chain pitch of 1 mm are respectively termed pitch diameter factor, tip diameter issue and caliper diameter issue. The respective elements for respective numbers of teeth are listed beneath. If these variables are multiplied by chain pitch, the basic dimensions on the corresponding sprocket can be obtained.
Instance:
During the case of 80 (25.forty mm pitch) with 35 teeth Pitch diameter (Dp) = P×Pitch diameter factor
Calculation formulas for tooth gap forms
Because the most rational tooth gap forms by which the pressure angle modifications in response for the elongation of a smoothly rotated roller chain with all the lapse of support time, ANSI specify two kinds of tooth profiles: U-type and S-type. Generally, S-type tooth profiles are adopted in accordance with ANSI, and our normal sprockets also have S-tooth profiles.