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December 30, 2020

Sprockets can be classified into normal sprockets, HK sprockets along with other sprockets.
one. Conventional sprocket
Common sprockets are ANSI sprockets which might be engaged with standard series roller chains. See P125 for dimensions.
You will find two types of tooth profiles: U-tooth and S-tooth.
two. HK sprocket
HK sprockets might be engaged with HK series roller chains, and individuals for single strand chains are identical to common sprockets. Even so, sprockets for several strand chains are distinct from common sprockets in sprocket tooth profile.
three. Other sprockets
Other sprockets are created according on the following calculation formulas to suit respective specialty chains.
The sprockets utilised to the following chains would be the similar because the standard sprockets in tooth gap form, but unique in tooth thickness (sprocket tooth profile).
4. Calculation of sprocket dimensions
The dimensions of conventional sprockets and also other common sprockets are calculated as follows. To start with, the diameters of sprockets are calculated through the following calculation formulas.
Following, sprocket tooth profile (the form in the tooth according to its thickness) is calculated through the following calculation formulas. (The values shown within the following pages have been calculated by these formulas and regarded as the typical values.)
Calculation formulas for diameters and tooth gap types Calculation formulas for diameters
Calculation of pitch diameter, tip diameter and caliper diameter
The fundamental dimensions of the sprocket appropriate to get a chain pitch of 1 mm are respectively identified as pitch diameter issue, tip diameter factor 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 often obtained.
Example:
In the case of 80 (25.forty mm pitch) with 35 teeth Pitch diameter (Dp) = P×Pitch diameter element
Calculation formulas for tooth gap varieties
As the most rational tooth gap varieties in which the stress angle adjustments in response towards the elongation of the smoothly rotated roller chain together with the lapse of support time, ANSI specify two sorts of tooth profiles: U-type and S-type. Usually, S-type tooth profiles are adopted in accordance with ANSI, and our common sprockets also have S-tooth profiles.