Sprockets can be classified into typical sprockets, HK sprockets and also other sprockets.
1. Normal sprocket
Typical sprockets are ANSI sprockets which can be engaged with common series roller chains. See P125 for dimensions.
There are actually two forms of tooth profiles: U-tooth and S-tooth.
two. HK sprocket
HK sprockets may be engaged with HK series roller chains, and those for single strand chains are identical to standard sprockets. Having said that, sprockets for numerous strand chains are various from common sprockets in sprocket tooth profile.
3. Other sprockets
Other sprockets are made in accordance for the following calculation formulas to suit respective specialty chains.
The sprockets applied for that following chains are the identical because the typical sprockets in tooth gap kind, but distinctive in tooth thickness (sprocket tooth profile).
4. Calculation of sprocket dimensions
The dimensions of typical sprockets and other common sprockets are calculated as follows. At the outset, the diameters of sprockets are calculated from your following calculation formulas.
Up coming, sprocket tooth profile (the shape from the tooth based on its thickness) is calculated in the following calculation formulas. (The values shown in the following pages have been calculated by these formulas and regarded as the common values.)
Calculation formulas for diameters and tooth gap varieties Calculation formulas for diameters
Calculation of pitch diameter, tip diameter and caliper diameter
The essential dimensions of a sprocket suitable to get a chain pitch of 1 mm are respectively named pitch diameter component, tip diameter component and caliper diameter element. The respective factors for respective numbers of teeth are listed below. If these variables are multiplied by chain pitch, the basic dimensions from the corresponding sprocket could be obtained.
Illustration:
In the case of 80 (25.40 mm pitch) with 35 teeth Pitch diameter (Dp) = P×Pitch diameter component
Calculation formulas for tooth gap types
Since the most rational tooth gap varieties by which the strain angle modifications in response to the elongation of a smoothly rotated roller chain with all the lapse of service time, ANSI specify two kinds of tooth profiles: U-type and S-type. Generally, S-type tooth profiles are adopted in accordance with ANSI, and our common sprockets also have S-tooth profiles.