Sprockets is often classified into regular sprockets, HK sprockets and also other sprockets.
1. Standard sprocket
Typical 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.
2. HK sprocket
HK sprockets can be engaged with HK series roller chains, and individuals for single strand chains are identical to conventional sprockets. Nonetheless, sprockets for several strand chains are different from regular sprockets in sprocket tooth profile.
3. Other sprockets
Other sprockets are built according to your following calculation formulas to suit respective specialty chains.
The sprockets employed to the following chains are the very same since the conventional sprockets in tooth gap form, but distinctive in tooth thickness (sprocket tooth profile).
4. Calculation of sprocket dimensions
The dimensions of standard sprockets as well as other common sprockets are calculated as follows. Initially, the diameters of sprockets are calculated in the following calculation formulas.
Upcoming, sprocket tooth profile (the shape from the tooth based on its thickness) is calculated in the following calculation formulas. (The values proven from the following pages had been calculated by these formulas and regarded as the standard values.)
Calculation formulas for diameters and tooth gap forms Calculation formulas for diameters
Calculation of pitch diameter, tip diameter and caliper diameter
The fundamental dimensions of the sprocket appropriate for a chain pitch of one mm are respectively termed pitch diameter component, tip diameter factor and caliper diameter issue. The respective things for respective numbers of teeth are listed below. If these aspects are multiplied by chain pitch, the essential dimensions of your corresponding sprocket may be obtained.
Illustration:
In the situation of 80 (25.40 mm pitch) with 35 teeth Pitch diameter (Dp) ＝ P×Pitch diameter component
Calculation formulas for tooth gap types
Because the most rational tooth gap forms through which the pressure angle changes in response to your elongation of a smoothly rotated roller chain using the lapse of service 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 typical sprockets also have S-tooth profiles.