Sprockets is often classified into standard sprockets, HK sprockets together with other sprockets.
one. Regular sprocket
Typical sprockets are ANSI sprockets which can be engaged with conventional series roller chains. See P125 for dimensions.
You will find two kinds of tooth profiles: U-tooth and S-tooth.
two. HK sprocket
HK sprockets can be engaged with HK series roller chains, and individuals for single strand chains are identical to normal sprockets. Nevertheless, sprockets for a number of strand chains are distinctive from standard sprockets in sprocket tooth profile.
three. Other sprockets
Other sprockets are developed in accordance to your following calculation formulas to suit respective specialty chains.
The sprockets made use of for your following chains would be the same because the common sprockets in tooth gap kind, but diverse in tooth thickness (sprocket tooth profile).
4. Calculation of sprocket dimensions
The dimensions of regular sprockets as well as other common sprockets are calculated as follows. Initially, the diameters of sprockets are calculated through the following calculation formulas.
Upcoming, sprocket tooth profile (the shape with the tooth based upon its thickness) is calculated through the following calculation formulas. (The values shown within the following pages had been calculated by these formulas and regarded as the typical values.)
Calculation formulas for diameters and tooth gap varieties Calculation formulas for diameters
Calculation of pitch diameter, tip diameter and caliper diameter
The essential dimensions of the sprocket suitable for a chain pitch of one mm are respectively called pitch diameter aspect, tip diameter element and caliper diameter element. The respective factors for respective numbers of teeth are listed beneath. If these things are multiplied by chain pitch, the essential dimensions in the corresponding sprocket might be obtained.
Inside the situation of 80 (25.40 mm pitch) with 35 teeth Pitch diameter (Dp) = P×Pitch diameter issue
Calculation formulas for tooth gap forms
Because the most rational tooth gap forms by which the pressure angle adjustments in response towards the elongation of the smoothly rotated roller chain using the lapse of services time, ANSI specify two forms 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.