Sprockets is usually classified into common sprockets, HK sprockets and other sprockets.
1. Regular sprocket
Regular sprockets are ANSI sprockets which could be engaged with regular series roller chains. See P125 for dimensions.
You can find two varieties of tooth profiles: U-tooth and S-tooth.
two. HK sprocket
HK sprockets is often engaged with HK series roller chains, and those for single strand chains are identical to common sprockets. However, sprockets for various strand chains are unique from standard sprockets in sprocket tooth profile.
3. Other sprockets
Other sprockets are made according to your following calculation formulas to suit respective specialty chains.
The sprockets used for your following chains would be the similar since the common sprockets in tooth gap kind, but different in tooth thickness (sprocket tooth profile).
4. Calculation of sprocket dimensions
The dimensions of standard sprockets and also other standard sprockets are calculated as follows. At the outset, the diameters of sprockets are calculated through the following calculation formulas.
Upcoming, sprocket tooth profile (the shape in the tooth dependant upon its thickness) is calculated from the following calculation formulas. (The values shown inside the following pages have been calculated by these formulas and thought to be the conventional values.)
Calculation formulas for diameters and tooth gap kinds Calculation formulas for diameters
Calculation of pitch diameter, tip diameter and caliper diameter
The basic dimensions of a sprocket suitable for a chain pitch of one mm are respectively identified as pitch diameter factor, tip diameter issue and caliper diameter issue. The respective factors for respective numbers of teeth are listed under. If these variables are multiplied by chain pitch, the essential dimensions in the corresponding sprocket could be obtained.
Illustration:
In the case of 80 (25.forty mm pitch) with 35 teeth Pitch diameter (Dp) ＝ P×Pitch diameter aspect
Calculation formulas for tooth gap varieties
As the most rational tooth gap kinds in which the stress angle improvements in response on the elongation of a smoothly rotated roller chain together with the lapse of service time, ANSI specify two sorts of tooth profiles: U-type and S-type. In general, S-type tooth profiles are adopted in accordance with ANSI, and our regular sprockets also have S-tooth profiles.