Sprockets could be classified into typical sprockets, HK sprockets along with other sprockets.
one. Common sprocket
Typical sprockets are ANSI sprockets which could be engaged with typical series roller chains. See P125 for dimensions.
There are two varieties of tooth profiles: U-tooth and S-tooth.
two. HK sprocket
HK sprockets is often engaged with HK series roller chains, and people for single strand chains are identical to standard sprockets. Nonetheless, sprockets for several strand chains are distinctive from conventional sprockets in sprocket tooth profile.
three. Other sprockets
Other sprockets are intended according towards the following calculation formulas to suit respective specialty chains.
The sprockets used to the following chains would be the identical because the common sprockets in tooth gap type, but distinct in tooth thickness (sprocket tooth profile).
four. Calculation of sprocket dimensions
The dimensions of conventional sprockets along with other common sprockets are calculated as follows. To start with, the diameters of sprockets are calculated from your following calculation formulas.
Following, sprocket tooth profile (the shape of your tooth according to its thickness) is calculated from the following calculation formulas. (The values shown from the following pages had been calculated by these formulas and thought to be the typical 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 the sprocket appropriate to get a chain pitch of 1 mm are respectively referred to as pitch diameter component, tip diameter factor 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 on the corresponding sprocket is usually obtained.
While in the case of 80 (25.forty mm pitch) with 35 teeth Pitch diameter (Dp) = P×Pitch diameter issue
Calculation formulas for tooth gap forms
Since the most rational tooth gap forms in which the pressure angle modifications in response on the elongation of the smoothly rotated roller chain with the lapse of service time, ANSI specify two kinds of tooth profiles: U-type and S-type. On the whole, S-type tooth profiles are adopted in accordance with ANSI, and our normal sprockets also have S-tooth profiles.