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December 30, 2020

Sprockets may be classified into standard sprockets, HK sprockets as well as other sprockets.
one. Standard sprocket
Standard sprockets are ANSI sprockets which may be engaged with normal series roller chains. See P125 for dimensions.
You can find two varieties of tooth profiles: U-tooth and S-tooth.
two. HK sprocket
HK sprockets can be engaged with HK series roller chains, and those for single strand chains are identical to typical sprockets. Nonetheless, sprockets for several strand chains are unique from normal sprockets in sprocket tooth profile.
3. Other sprockets
Other sprockets are intended in accordance towards the following calculation formulas to suit respective specialty chains.
The sprockets utilised for your following chains are the identical as the conventional sprockets in tooth gap type, but various in tooth thickness (sprocket tooth profile).
four. Calculation of sprocket dimensions
The dimensions of regular sprockets as well as other standard sprockets are calculated as follows. Initially, the diameters of sprockets are calculated from your following calculation formulas.
Up coming, sprocket tooth profile (the form with the tooth depending on its thickness) is calculated from your following calculation formulas. (The values shown during the following pages have been calculated by these formulas and regarded as the normal 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 the sprocket suitable to get a chain pitch of 1 mm are respectively termed pitch diameter component, tip diameter element and caliper diameter component. The respective factors for respective numbers of teeth are listed below. If these factors are multiplied by chain pitch, the fundamental dimensions with the corresponding sprocket is usually obtained.
Illustration:
During the case of 80 (25.40 mm pitch) with 35 teeth Pitch diameter (Dp) = P×Pitch diameter issue
Calculation formulas for tooth gap forms
Because the most rational tooth gap types during which the strain angle improvements in response on 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. On the whole, S-type tooth profiles are adopted in accordance with ANSI, and our typical sprockets also have S-tooth profiles.