Dimensions of Sprocket

Sprockets can be classified into regular sprockets, HK sprockets and other sprockets.
one. Standard sprocket
Typical sprockets are ANSI sprockets which may be engaged with regular series roller chains. See P125 for dimensions.
There are two varieties of tooth profiles: U-tooth and S-tooth.
2. HK sprocket
HK sprockets can be engaged with HK series roller chains, and these for single strand chains are identical to common sprockets. Nevertheless, sprockets for numerous strand chains are distinctive from typical 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 made use of for the following chains will be the similar because the regular sprockets in tooth gap form, but different in tooth thickness (sprocket tooth profile).
4. Calculation of sprocket dimensions
The dimensions of normal sprockets together with other general 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 of the tooth based on its thickness) is calculated from your following calculation formulas. (The values proven during the following pages were calculated by these formulas and regarded as the common values.)
Calculation formulas for diameters and tooth gap varieties Calculation formulas for diameters
Calculation of pitch diameter, tip diameter and caliper diameter
The basic dimensions of the sprocket suitable for any chain pitch of one mm are respectively known as pitch diameter element, tip diameter element and caliper diameter element. The respective variables for respective numbers of teeth are listed below. If these factors are multiplied by chain pitch, the basic dimensions of your corresponding sprocket can be obtained.
Example:
Inside the case of 80 (25.forty mm pitch) with 35 teeth Pitch diameter (Dp) = P×Pitch diameter aspect
Calculation formulas for tooth gap varieties
As the most rational tooth gap forms during which the stress angle modifications in response on the elongation of a smoothly rotated roller chain using the lapse of support time, ANSI specify two sorts of tooth profiles: U-type and S-type. Generally, S-type tooth profiles are adopted in accordance with ANSI, and our common sprockets also have S-tooth profiles.

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