December 30, 2020

Sprockets can be classified into common sprockets, HK sprockets as well as other sprockets.
one. Common sprocket
Typical sprockets are ANSI sprockets which might be engaged with standard series roller chains. See P125 for dimensions.
You can 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 conventional sprockets. On the other hand, sprockets for a number of strand chains are distinctive from standard 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 applied for the following chains would be the very same as the common sprockets in tooth gap type, but distinct in tooth thickness (sprocket tooth profile).
four. Calculation of sprocket dimensions
The dimensions of typical sprockets together with other basic sprockets are calculated as follows. At the outset, the diameters of sprockets are calculated through the following calculation formulas.
Subsequent, sprocket tooth profile (the form from the tooth based on its thickness) is calculated from the following calculation formulas. (The values shown while in the following pages have been calculated by these formulas and regarded as the regular values.)
Calculation formulas for diameters and tooth gap types Calculation formulas for diameters
Calculation of pitch diameter, tip diameter and caliper diameter
The fundamental dimensions of the sprocket suitable to get a chain pitch of one mm are respectively called pitch diameter element, tip diameter aspect and caliper diameter factor. The respective components for respective numbers of teeth are listed under. If these things are multiplied by chain pitch, the essential dimensions of the corresponding sprocket is often obtained.
From the case of 80 (25.forty mm pitch) with 35 teeth Pitch diameter (Dp) = P×Pitch diameter element
Calculation formulas for tooth gap varieties
Since the most rational tooth gap forms through which the pressure angle alterations in response for the elongation of a smoothly rotated roller chain together with the lapse of support 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 conventional sprockets also have S-tooth profiles.