Sprockets could be classified into standard sprockets, HK sprockets together with other sprockets.
one. Normal sprocket
Typical sprockets are ANSI sprockets which might be engaged with normal series roller chains. See P125 for dimensions.
You will discover two styles of tooth profiles: U-tooth and S-tooth.
two. HK sprocket
HK sprockets might be engaged with HK series roller chains, and these for single strand chains are identical to standard sprockets. Even so, sprockets for multiple strand chains are various from common sprockets in sprocket tooth profile.
3. Other sprockets
Other sprockets are made according towards the following calculation formulas to suit respective specialty chains.
The sprockets applied to the following chains would be the identical since the typical sprockets in tooth gap form, but diverse in tooth thickness (sprocket tooth profile).
4. Calculation of sprocket dimensions
The dimensions of standard sprockets and other common sprockets are calculated as follows. Initially, the diameters of sprockets are calculated from your following calculation formulas.
Next, sprocket tooth profile (the shape from the tooth according to its thickness) is calculated in the following calculation formulas. (The values proven within the following pages had been calculated by these formulas and thought to be the normal 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 the sprocket ideal for any chain pitch of one mm are respectively termed pitch diameter issue, tip diameter element and caliper diameter issue. The respective elements for respective numbers of teeth are listed beneath. If these aspects are multiplied by chain pitch, the essential dimensions with the corresponding sprocket is usually obtained.
Illustration:
Within the case of 80 (25.40 mm pitch) with 35 teeth Pitch diameter (Dp) = P×Pitch diameter factor
Calculation formulas for tooth gap kinds
Since the most rational tooth gap forms during which the strain angle changes in response towards the elongation of the smoothly rotated roller chain together with the lapse of services time, ANSI specify two kinds of tooth profiles: U-type and S-type. Usually, S-type tooth profiles are adopted in accordance with ANSI, and our regular sprockets also have S-tooth profiles.