Sprockets can be classified into typical sprockets, HK sprockets along with other sprockets.
one. Conventional sprocket
Normal sprockets are ANSI sprockets which might be engaged with typical series roller chains. See P125 for dimensions.
There are two varieties of tooth profiles: U-tooth and S-tooth.
two. HK sprocket
HK sprockets could be engaged with HK series roller chains, and those for single strand chains are identical to typical sprockets. However, sprockets for multiple strand chains are diverse from regular sprockets in sprocket tooth profile.
three. Other sprockets
Other sprockets are created according to your following calculation formulas to suit respective specialty chains.
The sprockets employed to the following chains would be the similar since the regular sprockets in tooth gap kind, but different in tooth thickness (sprocket tooth profile).
4. Calculation of sprocket dimensions
The dimensions of conventional sprockets and other common sprockets are calculated as follows. To start with, the diameters of sprockets are calculated from the following calculation formulas.
Upcoming, sprocket tooth profile (the shape on the tooth according to its thickness) is calculated from the following calculation formulas. (The values shown from the following pages were calculated by these formulas and regarded as the normal 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 1 mm are respectively referred to as pitch diameter element, tip diameter issue and caliper diameter aspect. The respective variables for respective numbers of teeth are listed beneath. If these things are multiplied by chain pitch, the essential dimensions of your corresponding sprocket is often obtained.
Example:
While in the case of 80 (25.40 mm pitch) with 35 teeth Pitch diameter (Dp) ＝ P×Pitch diameter issue
Calculation formulas for tooth gap varieties
As the most rational tooth gap varieties through which the pressure angle changes in response on the elongation of a smoothly rotated roller chain using the lapse of services time, ANSI specify two types of tooth profiles: U-type and S-type. In general, S-type tooth profiles are adopted in accordance with ANSI, and our normal sprockets also have S-tooth profiles.