Sprockets is usually classified into conventional sprockets, HK sprockets as well as other sprockets.
1. Regular sprocket
Regular sprockets are ANSI sprockets which can be engaged with normal series roller chains. See P125 for dimensions.
You will discover two forms of tooth profiles: U-tooth and S-tooth.
2. HK sprocket
HK sprockets may be engaged with HK series roller chains, and these for single strand chains are identical to conventional sprockets. Even so, sprockets for multiple strand chains are distinct from standard sprockets in sprocket tooth profile.
3. Other sprockets
Other sprockets are made in accordance for the following calculation formulas to suit respective specialty chains.
The sprockets used for that following chains will be the similar as the typical sprockets in tooth gap type, but unique in tooth thickness (sprocket tooth profile).
4. Calculation of sprocket dimensions
The dimensions of conventional sprockets and also other standard sprockets are calculated as follows. At the outset, the diameters of sprockets are calculated from the following calculation formulas.
Upcoming, sprocket tooth profile (the shape of your tooth according to its thickness) is calculated from the following calculation formulas. (The values shown during the following pages were 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 fundamental dimensions of a sprocket suitable for any chain pitch of one mm are respectively called pitch diameter element, tip diameter issue and caliper diameter factor. The respective variables for respective numbers of teeth are listed under. If these components are multiplied by chain pitch, the essential dimensions from the corresponding sprocket can be obtained.
Example:
During the case 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 kinds during which the strain angle improvements in response to the elongation of the smoothly rotated roller chain with all the lapse of support time, ANSI specify two sorts of tooth profiles: U-type and S-type. Usually, S-type tooth profiles are adopted in accordance with ANSI, and our normal sprockets also have S-tooth profiles.