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Sprockets is often classified into normal sprockets, HK sprockets and various sprockets.
one. Typical sprocket
Conventional sprockets are ANSI sprockets which could be engaged with conventional series roller chains. See P125 for dimensions.
You will find two sorts of tooth profiles: U-tooth and S-tooth.
two. HK sprocket
HK sprockets is often engaged with HK series roller chains, and people for single strand chains are identical to normal sprockets. Nevertheless, sprockets for various strand chains are distinctive from common sprockets in sprocket tooth profile.
three. Other sprockets
Other sprockets are designed according to your following calculation formulas to suit respective specialty chains.
The sprockets utilised to the following chains would be the identical because the regular sprockets in tooth gap type, but diverse in tooth thickness (sprocket tooth profile).
four. Calculation of sprocket dimensions
The dimensions of normal sprockets along with other basic sprockets are calculated as follows. In the beginning, the diameters of sprockets are calculated from your following calculation formulas.
Subsequent, sprocket tooth profile (the form in the tooth depending on its thickness) is calculated through the following calculation formulas. (The values proven inside the following pages have been calculated by these formulas and thought to be the normal values.)
Calculation formulas for diameters and tooth gap kinds Calculation formulas for diameters
Calculation of pitch diameter, tip diameter and caliper diameter
The essential dimensions of the sprocket appropriate for a chain pitch of 1 mm are respectively termed pitch diameter factor, tip diameter aspect and caliper diameter issue. The respective elements for respective numbers of teeth are listed under. If these elements are multiplied by chain pitch, the fundamental dimensions with the corresponding sprocket might be obtained.
Instance:
Inside the situation of 80 (25.forty mm pitch) with 35 teeth Pitch diameter (Dp) = P×Pitch diameter factor
Calculation formulas for tooth gap varieties
As the most rational tooth gap forms in which the pressure angle alterations in response on the elongation of a smoothly rotated roller chain with the lapse of service time, ANSI specify two forms of tooth profiles: U-type and S-type. Generally, S-type tooth profiles are adopted in accordance with ANSI, and our conventional sprockets also have S-tooth profiles.