Sprockets is often classified into common sprockets, HK sprockets and other sprockets.
1. Typical sprocket
Conventional sprockets are ANSI sprockets which may be engaged with normal series roller chains. See P125 for dimensions.
You will find two styles of tooth profiles: U-tooth and S-tooth.
two. HK sprocket
HK sprockets is often engaged with HK series roller chains, and individuals for single strand chains are identical to conventional sprockets. Even so, sprockets for many strand chains are unique from standard sprockets in sprocket tooth profile.
three. Other sprockets
Other sprockets are made in accordance on the following calculation formulas to suit respective specialty chains.
The sprockets applied to the following chains are the very same as the regular sprockets in tooth gap kind, but unique in tooth thickness (sprocket tooth profile).
4. Calculation of sprocket dimensions
The dimensions of conventional sprockets together with other standard sprockets are calculated as follows. At first, the diameters of sprockets are calculated through the following calculation formulas.
Upcoming, sprocket tooth profile (the form on the tooth depending on its thickness) is calculated in the following calculation formulas. (The values proven in the following pages had been calculated by these formulas and regarded as the normal 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 the sprocket ideal for any chain pitch of 1 mm are respectively termed pitch diameter element, tip diameter factor and caliper diameter aspect. The respective aspects for respective numbers of teeth are listed beneath. If these variables are multiplied by chain pitch, the essential dimensions of your corresponding sprocket may be obtained.
Instance:
While in the situation of 80 (25.forty mm pitch) with 35 teeth Pitch diameter (Dp) = P×Pitch diameter factor
Calculation formulas for tooth gap types
As the most rational tooth gap forms during which the strain angle adjustments in response to the elongation of a smoothly rotated roller chain with 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.