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December 30, 2020

Sprockets is often classified into normal sprockets, HK sprockets along with other sprockets.
1. Normal sprocket
Common sprockets are ANSI sprockets which might be engaged with normal series roller chains. See P125 for dimensions.
There are two kinds 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 typical sprockets. Having said that, sprockets for multiple strand chains are diverse from conventional sprockets in sprocket tooth profile.
three. Other sprockets
Other sprockets are developed according towards the following calculation formulas to suit respective specialty chains.
The sprockets used to the following chains will be the very same because 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 along with other common sprockets are calculated as follows. At first, the diameters of sprockets are calculated in the following calculation formulas.
Upcoming, sprocket tooth profile (the form in the tooth dependant upon its thickness) is calculated through the following calculation formulas. (The values shown from the following pages were calculated by these formulas and thought to be 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 suitable to get a chain pitch of 1 mm are respectively named pitch diameter aspect, tip diameter element and caliper diameter issue. The respective variables for respective numbers of teeth are listed under. If these factors are multiplied by chain pitch, the fundamental dimensions on the corresponding sprocket might be obtained.
Illustration:
Within the case of 80 (25.forty mm pitch) with 35 teeth Pitch diameter (Dp) = P×Pitch diameter issue
Calculation formulas for tooth gap types
Because the most rational tooth gap varieties in which the strain angle adjustments in response towards the elongation of a smoothly rotated roller chain using the lapse of services 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 normal sprockets also have S-tooth profiles.