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December 30, 2020

Sprockets may be classified into conventional sprockets, HK sprockets as well as other sprockets.
1. Regular sprocket
Regular sprockets are ANSI sprockets which might be engaged with regular series roller chains. See P125 for dimensions.
You will discover two varieties 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 normal sprockets. Nevertheless, sprockets for several strand chains are unique from normal sprockets in sprocket tooth profile.
3. Other sprockets
Other sprockets are designed in accordance towards the following calculation formulas to suit respective specialty chains.
The sprockets applied for the following chains are the similar as 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 as well as other basic sprockets are calculated as follows. In the beginning, the diameters of sprockets are calculated through the following calculation formulas.
Subsequent, sprocket tooth profile (the form of your tooth based upon its thickness) is calculated from the following calculation formulas. (The values shown inside the following pages have been calculated by these formulas and thought to be the standard 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 the sprocket suitable to get a chain pitch of one mm are respectively called pitch diameter factor, tip diameter component and caliper diameter element. The respective variables for respective numbers of teeth are listed beneath. If these variables are multiplied by chain pitch, the essential dimensions in the corresponding sprocket may be obtained.
Instance:
During the case of 80 (25.40 mm pitch) with 35 teeth Pitch diameter (Dp) = P×Pitch diameter element
Calculation formulas for tooth gap kinds
Because the most rational tooth gap types through which the pressure angle changes in response to your elongation of a smoothly rotated roller chain with all the lapse of support 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.