Sprockets is often classified into regular sprockets, HK sprockets and also other sprockets.
1. Conventional sprocket
Conventional sprockets are ANSI sprockets which can be engaged with normal series roller chains. See P125 for dimensions.
You will discover two types of tooth profiles: U-tooth and S-tooth.
two. HK sprocket
HK sprockets can be 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 diverse from standard sprockets in sprocket tooth profile.
3. Other sprockets
Other sprockets are developed according on the following calculation formulas to suit respective specialty chains.
The sprockets made use of for that following chains will be the similar because the common sprockets in tooth gap type, but various in tooth thickness (sprocket tooth profile).
4. Calculation of sprocket dimensions
The dimensions of normal sprockets together with other standard sprockets are calculated as follows. At the outset, the diameters of sprockets are calculated from your following calculation formulas.
Subsequent, sprocket tooth profile (the form in the tooth depending on its thickness) is calculated from your following calculation formulas. (The values proven in the following pages have been calculated by these formulas and thought to be the standard values.)
Calculation formulas for diameters and tooth gap varieties Calculation formulas for diameters
Calculation of pitch diameter, tip diameter and caliper diameter
The fundamental dimensions of the sprocket appropriate to get a chain pitch of one mm are respectively called pitch diameter aspect, tip diameter component and caliper diameter aspect. The respective things for respective numbers of teeth are listed below. If these components are multiplied by chain pitch, the basic dimensions with the corresponding sprocket is usually obtained.
Illustration:
In the situation of 80 (25.40 mm pitch) with 35 teeth Pitch diameter (Dp) = P×Pitch diameter component
Calculation formulas for tooth gap forms
As the most rational tooth gap forms by which the strain angle changes in response to the elongation of a smoothly rotated roller chain using 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 regular sprockets also have S-tooth profiles.