Sprockets might be classified into conventional sprockets, HK sprockets as well as other sprockets.
1. Normal sprocket
Common sprockets are ANSI sprockets which can be engaged with conventional series roller chains. See P125 for dimensions.
You’ll find two sorts of tooth profiles: U-tooth and S-tooth.
2. HK sprocket
HK sprockets may be engaged with HK series roller chains, and individuals for single strand chains are identical to typical sprockets. Even so, sprockets for numerous strand chains are different from standard sprockets in sprocket tooth profile.
3. Other sprockets
Other sprockets are developed in accordance to the following calculation formulas to suit respective specialty chains.
The sprockets used for your following chains will be the similar as the standard sprockets in tooth gap form, but distinctive in tooth thickness (sprocket tooth profile).
4. Calculation of sprocket dimensions
The dimensions of standard sprockets and also other basic sprockets are calculated as follows. Initially, the diameters of sprockets are calculated from the following calculation formulas.
Up coming, sprocket tooth profile (the shape of the tooth based on its thickness) is calculated from your following calculation formulas. (The values shown in the following pages have been calculated by these formulas and thought to be the normal 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 ideal to get a chain pitch of one mm are respectively known as pitch diameter element, tip diameter factor and caliper diameter factor. The respective factors for respective numbers of teeth are listed beneath. If these elements are multiplied by chain pitch, the essential dimensions in the corresponding sprocket might be obtained.
Illustration:
From the situation of 80 (25.40 mm pitch) with 35 teeth Pitch diameter (Dp) ＝ P×Pitch diameter aspect
Calculation formulas for tooth gap kinds
Since the most rational tooth gap varieties by which the strain angle adjustments in response to your elongation of a smoothly rotated roller chain with all the lapse of support time, ANSI specify two types of tooth profiles: U-type and S-type. Usually, S-type tooth profiles are adopted in accordance with ANSI, and our common sprockets also have S-tooth profiles.