Sprockets can be classified into common sprockets, HK sprockets together with other sprockets.
1. Regular sprocket
Standard sprockets are ANSI sprockets which might be engaged with common series roller chains. See P125 for dimensions.
You can find two sorts of tooth profiles: U-tooth and S-tooth.
two. HK sprocket
HK sprockets could be engaged with HK series roller chains, and individuals for single strand chains are identical to common sprockets. Having said that, sprockets for several strand chains are distinct from typical 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 utilised for the following chains are the very same because the conventional sprockets in tooth gap kind, but diverse in tooth thickness (sprocket tooth profile).
four. Calculation of sprocket dimensions
The dimensions of standard sprockets together with other basic sprockets are calculated as follows. In the beginning, the diameters of sprockets are calculated in the following calculation formulas.
Upcoming, sprocket tooth profile (the shape in the tooth based upon its thickness) is calculated in the following calculation formulas. (The values proven inside the following pages have been calculated by these formulas and thought to be the typical 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 the sprocket ideal for a chain pitch of one mm are respectively called pitch diameter aspect, tip diameter factor and caliper diameter element. The respective components for respective numbers of teeth are listed under. If these elements are multiplied by chain pitch, the basic dimensions in the corresponding sprocket is often obtained.
Instance:
In the case 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 types in which the strain angle improvements in response to your elongation of the smoothly rotated roller chain with all the lapse of services 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 typical sprockets also have S-tooth profiles.