Sprockets could be classified into normal sprockets, HK sprockets and also other sprockets.
1. Conventional sprocket
Standard sprockets are ANSI sprockets which could be engaged with typical series roller chains. See P125 for dimensions.
You’ll find two varieties of tooth profiles: U-tooth and S-tooth.
two. HK sprocket
HK sprockets may be engaged with HK series roller chains, and these for single strand chains are identical to typical sprockets. Even so, sprockets for numerous strand chains are diverse from standard sprockets in sprocket tooth profile.
3. Other sprockets
Other sprockets are made in accordance to your following calculation formulas to suit respective specialty chains.
The sprockets utilised for that following chains would be the similar as the typical sprockets in tooth gap form, but diverse in tooth thickness (sprocket tooth profile).
4. Calculation of sprocket dimensions
The dimensions of typical sprockets along with other standard sprockets are calculated as follows. In the beginning, the diameters of sprockets are calculated through the following calculation formulas.
Upcoming, sprocket tooth profile (the form of the tooth according to its thickness) is calculated from your following calculation formulas. (The values proven from the following pages have been calculated by these formulas and regarded as the normal values.)
Calculation formulas for diameters and tooth gap varieties Calculation formulas for diameters
Calculation of pitch diameter, tip diameter and caliper diameter
The essential dimensions of the sprocket ideal for a chain pitch of 1 mm are respectively called pitch diameter issue, tip diameter element and caliper diameter element. The respective variables for respective numbers of teeth are listed beneath. If these elements are multiplied by chain pitch, the fundamental dimensions on the corresponding sprocket is usually obtained.
Inside the situation of 80 (25.forty mm pitch) with 35 teeth Pitch diameter (Dp) = P×Pitch diameter element
Calculation formulas for tooth gap types
Since the most rational tooth gap types in which the strain angle alterations in response for the elongation of the smoothly rotated roller chain with all the lapse of services time, ANSI specify two forms 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.