Sprockets is often classified into normal sprockets, HK sprockets together with other sprockets.
one. Typical sprocket
Common sprockets are ANSI sprockets which can be engaged with typical 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 those for single strand chains are identical to conventional sprockets. On the other hand, sprockets for various strand chains are various from conventional sprockets in sprocket tooth profile.
three. Other sprockets
Other sprockets are made according to your following calculation formulas to suit respective specialty chains.
The sprockets utilized to the following chains will be the identical since the common sprockets in tooth gap type, but different in tooth thickness (sprocket tooth profile).
four. Calculation of sprocket dimensions
The dimensions of typical sprockets together with other general sprockets are calculated as follows. At the outset, the diameters of sprockets are calculated in the following calculation formulas.
Upcoming, sprocket tooth profile (the shape in the tooth according to its thickness) is calculated 
from your following calculation formulas. (The values proven during the following pages had been calculated by these formulas and regarded as the common values.)
Calculation formulas for diameters and tooth gap kinds 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 named pitch diameter element, tip diameter aspect and caliper diameter component. The respective factors for respective numbers of teeth are listed below. If these factors are multiplied by chain pitch, the basic dimensions of your corresponding sprocket is often obtained.
Illustration:
Inside the situation of 80 (25.forty mm pitch) with 35 teeth Pitch diameter (Dp) ＝ P×Pitch diameter factor
Calculation formulas for tooth gap forms
As the most rational tooth gap varieties by which the strain angle alterations in response towards the elongation of the smoothly rotated roller chain together with the lapse of services time, ANSI specify two sorts 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.
