Sprockets is often classified into common sprockets, HK sprockets and various sprockets.
one. Common sprocket
Conventional sprockets are ANSI sprockets which can be engaged with typical series roller chains. See P125 for dimensions.
You will discover two varieties of tooth profiles: U-tooth and S-tooth.
2. HK sprocket
HK sprockets is usually engaged with HK series roller chains, and those for single strand chains are identical to normal sprockets. Having said that, sprockets for numerous strand chains are distinctive from normal sprockets in sprocket tooth profile.
three. Other sprockets
Other sprockets are built in accordance on the following calculation formulas to suit respective specialty chains.
The sprockets utilised for that following chains will be the exact same since the regular sprockets in tooth gap form, but various in tooth thickness (sprocket tooth profile).
4. Calculation of sprocket dimensions
The dimensions of typical sprockets together with other general sprockets are calculated as follows. Initially, the diameters of sprockets are calculated in the following calculation formulas.
Upcoming, sprocket tooth profile (the form of the tooth according to its thickness) is calculated from the following calculation formulas. (The values shown inside the following pages had been calculated by these formulas and regarded as the standard 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 suitable for any chain pitch of one mm are respectively identified as pitch diameter aspect, tip diameter component and caliper diameter element. The respective things for respective numbers of teeth are listed under. If these factors are multiplied by chain pitch, the essential dimensions from the corresponding sprocket is usually obtained.
Instance:
Within the case of 80 (25.forty mm pitch) with 35 teeth Pitch diameter (Dp) = P×Pitch diameter aspect
Calculation formulas for tooth gap forms
Since the most rational tooth gap forms by which the pressure angle changes in response on the elongation of the smoothly rotated roller chain with 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.