Sprockets might be classified into common sprockets, HK sprockets along with other sprockets.
1. Common sprocket
Standard sprockets are ANSI sprockets which may be engaged with common series roller chains. See P125 for dimensions.
You will find two sorts of tooth profiles: U-tooth and S-tooth.
2. HK sprocket
HK sprockets could be engaged with HK series roller chains, and people for single strand chains are identical to common sprockets. Even so, sprockets for several strand chains are distinctive from typical sprockets in sprocket tooth profile.
3. Other sprockets
Other sprockets are made according towards the following calculation formulas to suit respective specialty chains.
The sprockets used for your following chains would be the very same as the standard sprockets in tooth gap type, but diverse in tooth thickness (sprocket tooth profile).
4. Calculation of sprocket dimensions
The dimensions of conventional sprockets as well as other basic sprockets are calculated as follows. At first, the diameters of sprockets are calculated in the following calculation formulas.
Subsequent, sprocket tooth profile (the shape with the tooth based upon its thickness) is calculated through the following calculation formulas. (The values proven during the following pages have been calculated by these formulas and thought to be the typical values.)
Calculation formulas for diameters and tooth gap types Calculation formulas for diameters
Calculation of pitch diameter, tip diameter and caliper diameter
The fundamental dimensions of a sprocket ideal for any chain pitch of one mm are respectively identified as pitch diameter aspect, tip diameter element and caliper diameter element. The respective factors for respective numbers of teeth are listed under. If these components are multiplied by chain pitch, the basic dimensions with the corresponding sprocket is often obtained.
Example:
Within the situation of 80 (25.forty mm pitch) with 35 teeth Pitch diameter (Dp) ＝ P×Pitch diameter issue
Calculation formulas for tooth gap types
Since the most rational tooth gap types by which the strain angle adjustments in response to your elongation of the smoothly rotated roller chain with all the lapse of service time, ANSI specify two forms 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.