Dimensions of Sprocket

Sprockets is usually classified into normal sprockets, HK sprockets and also other sprockets.
one. Standard sprocket
Normal sprockets are ANSI sprockets which might be engaged with normal series roller chains. See P125 for dimensions.
You will find two forms of tooth profiles: U-tooth and S-tooth.
2. HK sprocket
HK sprockets can be engaged with HK series roller chains, and individuals for single strand chains are identical to regular sprockets. Even so, sprockets for several strand chains are distinct from conventional sprockets in sprocket tooth profile.
3. Other sprockets
Other sprockets are made in accordance to your following calculation formulas to suit respective specialty chains.
The sprockets applied for your following chains will be the same as the conventional sprockets in tooth gap form, but distinct in tooth thickness (sprocket tooth profile).
four. Calculation of sprocket dimensions
The dimensions of regular sprockets and various general sprockets are calculated as follows. In the beginning, the diameters of sprockets are calculated in the following calculation formulas.
Next, sprocket tooth profile (the shape with the tooth depending on its thickness) is calculated from the following calculation formulas. (The values shown in the following pages have been calculated by these formulas and thought to be the conventional values.)
Calculation formulas for diameters and tooth gap varieties Calculation formulas for diameters
Calculation of pitch diameter, tip diameter and caliper diameter
The basic dimensions of a sprocket appropriate for any chain pitch of 1 mm are respectively named pitch diameter element, tip diameter component and caliper diameter component. The respective things for respective numbers of teeth are listed under. If these elements are multiplied by chain pitch, the fundamental dimensions in the corresponding sprocket can be obtained.
Illustration:
During the case of 80 (25.forty mm pitch) with 35 teeth Pitch diameter (Dp) ＝ P×Pitch diameter component
Calculation formulas for tooth gap forms
As the most rational tooth gap kinds through which the stress angle adjustments in response to the elongation of a smoothly rotated roller chain using 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 normal sprockets also have S-tooth profiles.