Sprockets is usually classified into standard sprockets, HK sprockets as well as other sprockets.
1. Regular sprocket
Common sprockets are ANSI sprockets which might be engaged with standard series roller chains. See P125 for dimensions.
There are two kinds of tooth profiles: U-tooth and S-tooth.
two. HK sprocket
HK sprockets could be engaged with HK series roller chains, and people for single strand chains are identical to regular sprockets. Having said that, sprockets for multiple strand chains are distinct from common sprockets in sprocket tooth profile.
3. Other sprockets
Other sprockets are built in accordance to your following calculation formulas to suit respective specialty chains.
The sprockets applied for that following chains would be the identical because the regular sprockets in tooth gap kind, but distinct in tooth thickness (sprocket tooth profile).
four. Calculation of sprocket dimensions
The dimensions of typical sprockets and various basic sprockets are calculated as follows. Initially, the diameters of sprockets are calculated through the following calculation formulas.
Subsequent, sprocket tooth profile (the shape of your tooth determined by its thickness) is calculated from the following calculation formulas. (The values proven from the following pages were calculated by these formulas and regarded as the conventional values.)
Calculation formulas for diameters and tooth gap varieties Calculation formulas for diameters
Calculation of pitch diameter, tip diameter and caliper diameter
The fundamental dimensions of a sprocket ideal to get a chain pitch of one mm are respectively termed pitch diameter element, tip diameter component and caliper diameter element. The respective variables for respective numbers of teeth are listed below. If these things 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 element
Calculation formulas for tooth gap types
Because the most rational tooth gap kinds through which the stress angle adjustments in response on the elongation of the smoothly rotated roller chain with all the lapse of service time, ANSI specify two varieties of tooth profiles: U-type and S-type. Usually, S-type tooth profiles are adopted in accordance with ANSI, and our regular sprockets also have S-tooth profiles.