Sprockets is usually classified into standard sprockets, HK sprockets and other sprockets.
1. Typical sprocket
Common sprockets are ANSI sprockets which can be engaged with regular series roller chains. See P125 for dimensions.
There are actually two styles of tooth profiles: U-tooth and S-tooth.
2. HK sprocket
HK sprockets might be engaged with HK series roller chains, and these for single strand chains are identical to conventional sprockets. On the other hand, sprockets for various strand chains are unique from conventional sprockets in sprocket tooth profile.
three. Other sprockets
Other sprockets are intended in accordance towards the following calculation formulas to suit respective specialty chains.
The sprockets applied to the following chains are the similar since the typical sprockets in tooth gap form, but unique in tooth thickness (sprocket tooth profile).
4. Calculation of sprocket dimensions
The dimensions of regular sprockets and various basic sprockets are calculated as follows. At first, the diameters of sprockets are calculated through the following calculation formulas.
Following, sprocket tooth profile (the shape from the tooth based upon its thickness) is calculated through the following calculation formulas. (The values proven while in the following pages were calculated by these formulas and regarded as the common 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 a sprocket appropriate for any chain pitch of 1 mm are respectively termed pitch diameter component, tip diameter issue and caliper diameter factor. The respective factors for respective numbers of teeth are listed beneath. If these factors are multiplied by chain pitch, the fundamental dimensions in the corresponding sprocket could be obtained.
Instance:
During the situation of 80 (25.40 mm pitch) with 35 teeth Pitch diameter (Dp) = P×Pitch diameter element
Calculation formulas for tooth gap kinds
As the most rational tooth gap kinds by which the stress angle changes in response towards the elongation of the smoothly rotated roller chain together with the lapse of services time, ANSI specify two kinds of tooth profiles: U-type and S-type. In general, S-type tooth profiles are adopted in accordance with ANSI, and our standard sprockets also have S-tooth profiles.