Sprockets can be classified into typical sprockets, HK sprockets and also other sprockets.
one. Common sprocket
Typical sprockets are ANSI sprockets which may be engaged with common 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 might be engaged with HK series roller chains, and people for single strand chains are identical to common sprockets. On the other hand, sprockets for a number of strand chains are different from common sprockets in sprocket tooth profile.
3. Other sprockets
Other sprockets are designed in accordance for the following calculation formulas to suit respective specialty chains.
The sprockets made use of for that following chains would be the similar as the typical sprockets in tooth gap kind, but distinct in tooth thickness (sprocket tooth profile).
4. Calculation of sprocket dimensions
The dimensions of standard sprockets as well as other common sprockets are calculated as follows. At the outset, the diameters of sprockets are calculated in the following calculation formulas.
Upcoming, sprocket tooth profile (the shape with the tooth based upon its thickness) is calculated from your following calculation formulas. (The values proven while in the following pages have been calculated by these formulas and thought to be the regular values.)
Calculation formulas for diameters and tooth gap varieties 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 identified as pitch diameter aspect, tip diameter aspect and caliper diameter element. The respective things for respective numbers of teeth are listed beneath. If these factors are multiplied by chain pitch, the fundamental dimensions of the corresponding sprocket can be obtained.
From the case of 80 (25.40 mm pitch) with 35 teeth Pitch diameter (Dp) = P×Pitch diameter component
Calculation formulas for tooth gap varieties
Since the most rational tooth gap forms through which the stress angle alterations in response towards 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. In general, S-type tooth profiles are adopted in accordance with ANSI, and our conventional sprockets also have S-tooth profiles.