Sprockets is usually classified into conventional sprockets, HK sprockets and other sprockets.
one. Regular sprocket
Conventional sprockets are ANSI sprockets which may be engaged with regular series roller chains. See P125 for dimensions.
There are two styles of tooth profiles: U-tooth and S-tooth.
2. HK sprocket
HK sprockets can be engaged with HK series roller chains, and people for single strand chains are identical to regular sprockets. Nonetheless, sprockets for multiple strand chains are different from typical sprockets in sprocket tooth profile.
three. Other sprockets
Other sprockets are designed according on the following calculation formulas to suit respective specialty chains.
The sprockets made use of to the following chains will be the very same since the regular sprockets in tooth gap form, but distinctive in tooth thickness (sprocket tooth profile).
four. Calculation of sprocket dimensions
The dimensions of regular sprockets as well as other basic sprockets are calculated as follows. At first, the diameters of sprockets are calculated from your following calculation formulas.
Following, sprocket tooth profile (the form with the tooth determined by its thickness) is calculated from the following calculation formulas. (The values proven while in the following pages have been calculated by these formulas and thought to be the typical values.)
Calculation formulas for diameters and tooth gap types Calculation formulas for diameters
Calculation of pitch diameter, tip diameter and caliper diameter
The essential dimensions of a sprocket appropriate for any chain pitch of one mm are respectively referred to as pitch diameter factor, tip diameter aspect and caliper diameter aspect. The respective elements for respective numbers of teeth are listed beneath. If these factors are multiplied by chain pitch, the essential dimensions of the corresponding sprocket might be obtained.
During the case of 80 (25.40 mm pitch) with 35 teeth Pitch diameter (Dp) = P×Pitch diameter aspect
Calculation formulas for tooth gap forms
Because the most rational tooth gap varieties through which the stress angle changes in response to the elongation of the smoothly rotated roller chain with the lapse of service time, ANSI specify two varieties of tooth profiles: U-type and S-type. On the whole, S-type tooth profiles are adopted in accordance with ANSI, and our standard sprockets also have S-tooth profiles.