Sprockets might be classified into normal sprockets, HK sprockets and other sprockets.
one. Standard sprocket
Standard sprockets are ANSI sprockets which might be engaged with regular series roller chains. See P125 for dimensions.
You can find two kinds of tooth profiles: U-tooth and S-tooth.
2. HK sprocket
HK sprockets is usually engaged with HK series roller chains, and these for single strand chains are identical to common sprockets. Nonetheless, sprockets for various strand chains are unique from regular sprockets in sprocket tooth profile.
three. Other sprockets
Other sprockets are designed in accordance to your following calculation formulas to suit respective specialty chains.
The sprockets used for your following chains will be the same since the standard sprockets in tooth gap type, but distinct in tooth thickness (sprocket tooth profile).
four. Calculation of sprocket dimensions
The dimensions of standard sprockets and also other general sprockets are calculated as follows. At first, the diameters of sprockets are calculated in the following calculation formulas.
Next, sprocket tooth profile (the form of your tooth based upon its thickness) is calculated through the following calculation formulas. (The values proven inside the following pages had been calculated by these formulas and thought to be the regular values.)
Calculation formulas for diameters and tooth gap kinds Calculation formulas for diameters
Calculation of pitch diameter, tip diameter and caliper diameter
The fundamental dimensions of the sprocket ideal for any chain pitch of one mm are respectively known as pitch diameter element, tip diameter element and caliper diameter factor. The respective components for respective numbers of teeth are listed under. If these elements are multiplied by chain pitch, the essential dimensions with the corresponding sprocket can be obtained.
Example:
From the situation of 80 (25.40 mm pitch) with 35 teeth Pitch diameter (Dp) = P×Pitch diameter element
Calculation formulas for tooth gap varieties
As the most rational tooth gap types through which the pressure angle improvements in response towards the elongation of the smoothly rotated roller chain with the lapse of support time, ANSI specify two sorts of tooth profiles: U-type and S-type. Usually, S-type tooth profiles are adopted in accordance with ANSI, and our standard sprockets also have S-tooth profiles.