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December 30, 2020

Sprockets may be classified into normal sprockets, HK sprockets together with other sprockets.
one. Typical sprocket
Regular sprockets are ANSI sprockets which can be engaged with regular series roller chains. See P125 for dimensions.
You will find two kinds of tooth profiles: U-tooth and S-tooth.
2. HK sprocket
HK sprockets can be engaged with HK series roller chains, and these for single strand chains are identical to common sprockets. However, sprockets for multiple strand chains are distinct from regular sprockets in sprocket tooth profile.
3. Other sprockets
Other sprockets are designed in accordance to the following calculation formulas to suit respective specialty chains.
The sprockets applied to the following chains would be the same because the normal sprockets in tooth gap form, but distinct in tooth thickness (sprocket tooth profile).
four. Calculation of sprocket dimensions
The dimensions of regular sprockets as well as other general sprockets are calculated as follows. At first, the diameters of sprockets are calculated from your following calculation formulas.
Following, sprocket tooth profile (the form on the tooth based upon its thickness) is calculated in the following calculation formulas. (The values proven within the following pages had been calculated by these formulas and regarded as the regular 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 ideal to get a chain pitch of one mm are respectively termed pitch diameter component, tip diameter factor and caliper diameter aspect. The respective aspects for respective numbers of teeth are listed under. If these components are multiplied by chain pitch, the essential dimensions in the corresponding sprocket can be obtained.
Instance:
During 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 kinds during which the stress angle adjustments in response on the elongation of a smoothly rotated roller chain with the lapse of service time, ANSI specify two sorts of tooth profiles: U-type and S-type. Normally, S-type tooth profiles are adopted in accordance with ANSI, and our standard sprockets also have S-tooth profiles.