Dimensions of Sprocket

Sprockets might be classified into regular sprockets, HK sprockets as well as other sprockets.
1. Normal sprocket
Normal sprockets are ANSI sprockets which could be engaged with regular 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 can be engaged with HK series roller chains, and those for single strand chains are identical to normal sprockets. On the other hand, sprockets for many strand chains are distinctive from regular sprockets in sprocket tooth profile.
3. Other sprockets
Other sprockets are made in accordance towards the following calculation formulas to suit respective specialty chains.
The sprockets applied for the following chains will be the very same because the common sprockets in tooth gap type, but diverse in tooth thickness (sprocket tooth profile).
four. Calculation of sprocket dimensions
The dimensions of regular sprockets as well as other common sprockets are calculated as follows. At the outset, the diameters of sprockets are calculated from the following calculation formulas.
Next, sprocket tooth profile (the shape on the tooth dependant upon its thickness) is calculated in the following calculation formulas. (The values proven within the following pages were calculated by these formulas and thought to be the normal 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 a sprocket appropriate for any chain pitch of one mm are respectively referred to as pitch diameter element, tip diameter aspect and caliper diameter factor. The respective variables for respective numbers of teeth are listed below. If these factors are multiplied by chain pitch, the fundamental dimensions from the corresponding sprocket might be obtained.
Example:
Inside the situation 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 kinds in which the stress angle changes in response to your elongation of the smoothly rotated roller chain with the lapse of services time, ANSI specify two forms 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.