Sprockets is usually classified into typical sprockets, HK sprockets and various sprockets.
one. Typical sprocket
Typical sprockets are ANSI sprockets which can be engaged with standard series roller chains. See P125 for dimensions.
You will find two types of tooth profiles: U-tooth and S-tooth.
two. HK sprocket
HK sprockets is often engaged with HK series roller chains, and individuals for single strand chains are identical to normal sprockets. Having said that, sprockets for multiple strand chains are distinct from conventional sprockets in sprocket tooth profile.
3. Other sprockets
Other sprockets are created in accordance to your following calculation formulas to suit respective specialty chains.
The sprockets utilized for that following chains will be the exact same because the common sprockets in tooth gap form, but unique in tooth thickness (sprocket tooth profile).
4. Calculation of sprocket dimensions
The dimensions of conventional sprockets and various common sprockets are calculated as follows. At the outset, the diameters of sprockets are calculated from the following calculation formulas.
Next, sprocket tooth profile (the shape in the tooth determined by its thickness) is calculated from the following calculation formulas. (The values proven while in the following pages had been calculated by these formulas and thought to be the standard 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 a chain pitch of 1 mm are respectively named pitch diameter issue, tip diameter aspect and caliper diameter issue. The respective components for respective numbers of teeth are listed under. If these components are multiplied by chain pitch, the basic dimensions in the corresponding sprocket could be obtained.
Instance:
While in the situation of 80 (25.40 mm pitch) with 35 teeth Pitch diameter (Dp) = P×Pitch diameter aspect
Calculation formulas for tooth gap varieties
As the most rational tooth gap forms by which the stress angle adjustments in response towards the elongation of the smoothly rotated roller chain with the lapse of support time, ANSI specify two forms of tooth profiles: U-type and S-type. Generally, S-type tooth profiles are adopted in accordance with ANSI, and our normal sprockets also have S-tooth profiles.