Sprockets could be classified into normal sprockets, HK sprockets and various sprockets.
one. Common sprocket
Typical sprockets are ANSI sprockets which can be engaged with regular series roller chains. See P125 for dimensions.
There are two sorts of tooth profiles: U-tooth and S-tooth.
two. HK sprocket
HK sprockets might be engaged with HK series roller chains, and individuals for single strand chains are identical to common sprockets. Nonetheless, sprockets for several strand chains are diverse from conventional sprockets in sprocket tooth profile.
3. Other sprockets
Other sprockets are created in accordance for the following calculation formulas to suit respective specialty chains.
The sprockets utilised for your following chains will be the identical as the standard sprockets in tooth gap kind, but distinct in tooth thickness (sprocket tooth profile).
four. Calculation of sprocket dimensions
The dimensions of typical sprockets and also other standard sprockets are calculated as follows. At the outset, the diameters of sprockets are calculated from your following calculation formulas.
Following, sprocket tooth profile (the shape in the tooth based upon its thickness) is calculated from the following calculation formulas. (The values shown during the following pages were calculated by these formulas and thought to be the regular values.)
Calculation formulas for diameters and tooth gap kinds 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 aspect, tip diameter component and caliper diameter factor. The respective elements for respective numbers of teeth are listed below. If these aspects are multiplied by chain pitch, the essential dimensions with the corresponding sprocket can be obtained.
Example:
Inside the situation of 80 (25.40 mm pitch) with 35 teeth Pitch diameter (Dp) ＝ P×Pitch diameter component
Calculation formulas for tooth gap types
Since the most rational tooth gap forms by which the stress angle modifications in response to your 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. On the whole, S-type tooth profiles are adopted in accordance with ANSI, and our common sprockets also have S-tooth profiles.
