Dimensions of Sprocket

Sprockets is often classified into typical sprockets, HK sprockets and other sprockets.
one. Typical sprocket
Standard sprockets are ANSI sprockets which can be engaged with common series roller chains. See P125 for dimensions.
There are actually two sorts of tooth profiles: U-tooth and S-tooth.
2. HK sprocket
HK sprockets is usually engaged with HK series roller chains, and these for single strand chains are identical to regular sprockets. Having said that, sprockets for several strand chains are unique from common sprockets in sprocket tooth profile.
three. Other sprockets
Other sprockets are designed in accordance to your following calculation formulas to suit respective specialty chains.
The sprockets applied for the following chains are the identical since the normal sprockets in tooth gap form, but different in tooth thickness (sprocket tooth profile).
4. Calculation of sprocket dimensions
The dimensions of typical sprockets and various common sprockets are calculated as follows. At first, the diameters of sprockets are calculated in the following calculation formulas.
Following, sprocket tooth profile (the form from the tooth based on its thickness) is calculated through the following calculation formulas. (The values shown inside the following pages had been calculated by these formulas and regarded as the conventional values.)
Calculation formulas for diameters and tooth gap forms Calculation formulas for diameters
Calculation of pitch diameter, tip diameter and caliper diameter
The basic dimensions of a sprocket suitable to get a chain pitch of one mm are respectively termed pitch diameter element, tip diameter issue and caliper diameter issue. The respective factors for respective numbers of teeth are listed below. If these elements are multiplied by chain pitch, the basic dimensions on the corresponding sprocket is often obtained.
Instance:
Inside the case of 80 (25.40 mm pitch) with 35 teeth Pitch diameter (Dp) ＝ P×Pitch diameter element
Calculation formulas for tooth gap varieties
As the most rational tooth gap types by which the strain angle modifications in response on the elongation of the smoothly rotated roller chain with the lapse of services time, ANSI specify two forms of tooth profiles: U-type and S-type. In general, S-type tooth profiles are adopted in accordance with ANSI, and our common sprockets also have S-tooth profiles.