Sprockets can be classified into standard sprockets, HK sprockets and other sprockets.
one. Normal sprocket
Standard sprockets are ANSI sprockets which might be engaged with regular series roller chains. See P125 for dimensions.
You will find two types of tooth profiles: U-tooth and S-tooth.
2. HK sprocket
HK sprockets may be engaged with HK series roller chains, and those for single strand chains are identical to regular sprockets. Even so, sprockets for numerous strand chains are various from conventional sprockets in sprocket tooth profile.
three. Other sprockets
Other sprockets are developed in accordance to your following calculation formulas to suit respective specialty chains.
The sprockets used for that following chains are the similar since the normal sprockets in tooth gap form, but different in tooth thickness (sprocket tooth profile).
4. Calculation of sprocket dimensions
The dimensions of normal sprockets as well as other standard sprockets are calculated as follows. At first, the diameters of sprockets are calculated from your following calculation formulas.
Following, sprocket tooth profile (the form of your tooth based upon its thickness) is calculated in the following calculation formulas. (The values proven from the following pages have been calculated by these formulas and regarded as the conventional values.)
Calculation formulas for diameters and tooth gap kinds Calculation formulas for diameters
Calculation of pitch diameter, tip diameter and caliper diameter
The essential dimensions of a sprocket appropriate for any chain pitch of one mm are respectively named pitch diameter aspect, tip diameter element and caliper diameter element. The respective aspects for respective numbers of teeth are listed beneath. If these elements are multiplied by chain pitch, the basic dimensions from the corresponding sprocket is often obtained.
In the case of 80 (25.40 mm pitch) with 35 teeth Pitch diameter (Dp) = P×Pitch diameter element
Calculation formulas for tooth gap types
Since the most rational tooth gap forms through which the stress angle modifications in response towards the elongation of the smoothly rotated roller chain using the lapse of services time, ANSI specify two forms 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.