Dimensions of Sprocket

Sprockets can be classified into conventional sprockets, HK sprockets and also other sprockets.
1. Regular sprocket
Common sprockets are ANSI sprockets which can be engaged with regular series roller chains. See P125 for dimensions.
You can find two forms of tooth profiles: U-tooth and S-tooth.
2. HK sprocket
HK sprockets could be engaged with HK series roller chains, and those for single strand chains are identical to conventional sprockets. Nonetheless, sprockets for various strand chains are distinctive from normal sprockets in sprocket tooth profile.
3. Other sprockets
Other sprockets are created according to the following calculation formulas to suit respective specialty chains.
The sprockets applied for the following chains would be the exact same because the common sprockets in tooth gap form, but distinct in tooth thickness (sprocket tooth profile).
four. Calculation of sprocket dimensions
The dimensions of typical sprockets together with other standard sprockets are calculated as follows. Initially, the diameters of sprockets are calculated from your following calculation formulas.
Upcoming, sprocket tooth profile (the form of your tooth based on its thickness) is calculated from the following calculation formulas. (The values proven from the following pages had been calculated by these formulas and thought to be the conventional values.)
Calculation formulas for diameters and tooth gap forms Calculation formulas for diameters
Calculation of pitch diameter, tip diameter and caliper diameter
The essential dimensions of the sprocket ideal for any chain pitch of one mm are respectively identified as pitch diameter factor, tip diameter aspect and caliper diameter element. The respective factors for respective numbers of teeth are listed below. If these elements are multiplied by chain pitch, the fundamental dimensions with the corresponding sprocket is often obtained.
Instance:
In the case of 80 (25.40 mm pitch) with 35 teeth Pitch diameter (Dp) ＝ P×Pitch diameter component
Calculation formulas for tooth gap kinds
Because the most rational tooth gap varieties during which the stress angle improvements in response to your elongation of a smoothly rotated roller chain with all the lapse of service time, ANSI specify two kinds of tooth profiles: U-type and S-type. On the whole, S-type tooth profiles are adopted in accordance with ANSI, and our conventional sprockets also have S-tooth profiles.