Sprockets may be classified into standard sprockets, HK sprockets and also other sprockets.
one. Conventional sprocket
Typical sprockets are ANSI sprockets which could be engaged with common series roller chains. See P125 for dimensions.
You’ll 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 these for single strand chains are identical to typical sprockets. On the other hand, sprockets for various strand chains are unique from regular sprockets in sprocket tooth profile.
3. Other sprockets
Other sprockets are created according on the following calculation formulas to suit respective specialty chains.
The sprockets applied for the following chains will be the very same as the regular sprockets in tooth gap type, but distinctive in tooth thickness (sprocket tooth profile).
four. Calculation of sprocket dimensions
The dimensions of normal sprockets and various common sprockets are calculated as follows. Initially, the diameters of sprockets are calculated through the following calculation formulas.
Up coming, sprocket tooth profile (the form on the tooth dependant upon its thickness) is calculated from the following calculation formulas. (The values proven during the following pages have been calculated by these formulas and regarded as the standard values.)
Calculation formulas for diameters and tooth gap types Calculation formulas for diameters
Calculation of pitch diameter, tip diameter and caliper diameter
The essential dimensions of a sprocket suitable for a chain pitch of 1 mm are respectively identified as pitch diameter component, tip diameter aspect and caliper diameter factor. The respective aspects for respective numbers of teeth are listed under. If these components are multiplied by chain pitch, the basic dimensions from the corresponding sprocket is usually obtained.
Example:
Inside the situation of 80 (25.40 mm pitch) with 35 teeth Pitch diameter (Dp) ＝ P×Pitch diameter component
Calculation formulas for tooth gap forms
As the most rational tooth gap forms in which the strain angle improvements in response to your elongation of the smoothly rotated roller chain together with the lapse of support time, ANSI specify two types of tooth profiles: U-type and S-type. In general, S-type tooth profiles are adopted in accordance with ANSI, and our regular sprockets also have S-tooth profiles.