Sprockets could be classified into standard sprockets, HK sprockets and also other sprockets.
one. Common sprocket
Common sprockets are ANSI sprockets which can be engaged with standard series roller chains. See P125 for dimensions.
There are actually two sorts of tooth profiles: U-tooth and S-tooth.
2. HK sprocket
HK sprockets could be engaged with HK series roller chains, and these for single strand chains are identical to common sprockets. Nevertheless, sprockets for multiple strand chains are various from conventional sprockets in sprocket tooth profile.
3. Other sprockets
Other sprockets are designed according for the following calculation formulas to suit respective specialty chains.
The sprockets utilised for your following chains will be the exact same since the typical sprockets in tooth gap type, but distinct in tooth thickness (sprocket tooth profile).
four. Calculation of sprocket dimensions
The dimensions of common sprockets along with other basic sprockets are calculated as follows. At the outset, the diameters of sprockets are calculated from your following calculation formulas.
Up coming, sprocket tooth profile (the shape of the tooth dependant upon its thickness) is calculated through the following calculation formulas. (The values shown inside the following pages were calculated by these formulas and regarded as the regular values.)
Calculation formulas for diameters and tooth gap types Calculation formulas for diameters
Calculation of pitch diameter, tip diameter and caliper diameter
The essential dimensions of the sprocket appropriate to get a chain pitch of one mm are respectively identified as pitch diameter factor, tip diameter element and caliper diameter factor. The respective factors for respective numbers of teeth are listed below. If these elements are multiplied by chain pitch, the fundamental dimensions on the corresponding sprocket can be obtained.
Example:
Within the case of 80 (25.40 mm pitch) with 35 teeth Pitch diameter (Dp) = P×Pitch diameter component
Calculation formulas for tooth gap forms
Because the most rational tooth gap varieties by which the pressure angle changes in response on 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. Normally, S-type tooth profiles are adopted in accordance with ANSI, and our normal sprockets also have S-tooth profiles.