Dimensions of Sprocket

Sprockets could be classified into typical sprockets, HK sprockets together with other sprockets.
1. Standard sprocket
Regular sprockets are ANSI sprockets which could be engaged with normal series roller chains. See P125 for dimensions.
There are actually two kinds of tooth profiles: U-tooth and S-tooth.
two. HK sprocket
HK sprockets can be engaged with HK series roller chains, and these for single strand chains are identical to common sprockets. Nonetheless, sprockets for various strand chains are distinctive from conventional sprockets in sprocket tooth profile.
three. Other sprockets
Other sprockets are built in accordance for the following calculation formulas to suit respective specialty chains.
The sprockets utilised for the following chains will be the identical since the conventional sprockets in tooth gap kind, but unique in tooth thickness (sprocket tooth profile).
4. Calculation of sprocket dimensions
The dimensions of typical sprockets along with other general sprockets are calculated as follows. At the outset, the diameters of sprockets are calculated through the following calculation formulas.
Next, sprocket tooth profile (the form with the tooth depending on its thickness) is calculated in the following calculation formulas. (The values proven during the following pages have been calculated by these formulas and regarded as the conventional 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 the sprocket appropriate for any chain pitch of one mm are respectively identified as pitch diameter factor, tip diameter component and caliper diameter component. The respective components for respective numbers of teeth are listed below. If these factors are multiplied by chain pitch, the fundamental dimensions of your corresponding sprocket could be obtained.
Inside the situation of 80 (25.forty mm pitch) with 35 teeth Pitch diameter (Dp) = P×Pitch diameter factor
Calculation formulas for tooth gap types
Because the most rational tooth gap kinds through which the strain angle modifications in response for the elongation of the smoothly rotated roller chain using the lapse of support time, ANSI specify two varieties of tooth profiles: U-type and S-type. Generally, S-type tooth profiles are adopted in accordance with ANSI, and our standard sprockets also have S-tooth profiles.


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