Sprockets could be classified into common sprockets, HK sprockets and various sprockets.
1. Common sprocket
Typical sprockets are ANSI sprockets which might be engaged with normal series roller chains. See P125 for dimensions.
You can find two types of tooth profiles: U-tooth and S-tooth.
2. HK sprocket
HK sprockets is often engaged with HK series roller chains, and people for single strand chains are identical to standard sprockets. Even so, sprockets for multiple strand chains are diverse from standard sprockets in sprocket tooth profile.
3. Other sprockets
Other sprockets are built according on the following calculation formulas to suit respective specialty chains.
The sprockets utilised for that following chains would be the similar since the conventional sprockets in tooth gap kind, but distinctive in tooth thickness (sprocket tooth profile).
4. Calculation of sprocket dimensions
The dimensions of normal sprockets together with other standard sprockets are calculated as follows. At the outset, the diameters of sprockets are calculated from the following calculation formulas.
Up coming, sprocket tooth profile (the shape of the tooth depending on its thickness) is calculated from your following calculation formulas. (The values proven within the following pages had been calculated by these formulas and regarded as the typical values.)
Calculation formulas for diameters and tooth gap kinds Calculation formulas for diameters
Calculation of pitch diameter, tip diameter and caliper diameter
The fundamental dimensions of the sprocket ideal to get a chain pitch of one mm are respectively identified as pitch diameter factor, tip diameter element and caliper diameter element. The respective things for respective numbers of teeth are listed beneath. If these components are multiplied by chain pitch, the fundamental dimensions of the corresponding sprocket might be obtained.
Example:
In the situation of 80 (25.forty mm pitch) with 35 teeth Pitch diameter (Dp) = P×Pitch diameter component
Calculation formulas for tooth gap varieties
Because the most rational tooth gap varieties in which the strain angle alterations in response for the elongation of a smoothly rotated roller chain together with the lapse of service time, ANSI specify two varieties of tooth profiles: U-type and S-type. Usually, S-type tooth profiles are adopted in accordance with ANSI, and our regular sprockets also have S-tooth profiles.

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