Sprockets might be classified into typical sprockets, HK sprockets and other sprockets.
1. Standard sprocket
Typical sprockets are ANSI sprockets which might be engaged with common series roller chains. See P125 for dimensions.
You can find two forms of tooth profiles: U-tooth and S-tooth.
2. HK sprocket
HK sprockets might be engaged with HK series roller chains, and individuals for single strand chains are identical to conventional sprockets. Even so, sprockets for several strand chains are unique from common sprockets in sprocket tooth profile.
three. Other sprockets
Other sprockets are made in accordance for the following calculation formulas to suit respective specialty chains.
The sprockets used for the following chains will be the identical since the typical sprockets in tooth gap type, but unique in tooth thickness (sprocket tooth profile).
4. Calculation of sprocket dimensions
The dimensions of typical sprockets together with other common sprockets are calculated as follows. In the beginning, the diameters of sprockets are calculated through the following calculation formulas.
Next, sprocket tooth profile (the shape of your tooth based on its thickness) is calculated through the following calculation formulas. (The values shown from the following pages have been calculated by these formulas and thought to be the common 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 the sprocket suitable for any chain pitch of 1 mm are respectively known as pitch diameter aspect, tip diameter element and caliper diameter issue. The respective components for respective numbers of teeth are listed below. If these elements are multiplied by chain pitch, the fundamental dimensions of your corresponding sprocket could 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 kinds
Because the most rational tooth gap forms through which the strain angle improvements in response to the elongation of the smoothly rotated roller chain with all 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 common sprockets also have S-tooth profiles.