Sprockets may be classified into standard sprockets, HK sprockets along with other sprockets.
1. Conventional sprocket
Regular sprockets are ANSI sprockets which might be engaged with common series roller chains. See P125 for dimensions.
You can find two forms of tooth profiles: U-tooth and S-tooth.
2. HK sprocket
HK sprockets could be engaged with HK series roller chains, and people for single strand chains are identical to common sprockets. On the other hand, sprockets for multiple strand chains are different from common sprockets in sprocket tooth profile.
three. Other sprockets
Other sprockets are developed in accordance on the following calculation formulas to suit respective specialty chains.
The sprockets made use of to the following chains would be the identical because the normal sprockets in tooth gap type, but different in tooth thickness (sprocket tooth profile).
4. Calculation of sprocket dimensions
The dimensions of regular sprockets and various general sprockets are calculated as follows. At first, the diameters of sprockets are calculated in the following calculation formulas.
Up coming, sprocket tooth profile (the form in the tooth based upon its thickness) is calculated from the following calculation formulas. (The values shown from the following pages had been calculated by these formulas and regarded as the typical 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 a chain pitch of one mm are respectively called pitch diameter factor, tip diameter element and caliper diameter issue. The respective factors for respective numbers of teeth are listed beneath. If these things are multiplied by chain pitch, the fundamental dimensions of your corresponding sprocket may be obtained.
Illustration:
Inside the situation of 80 (25.40 mm pitch) with 35 teeth Pitch diameter (Dp) = P×Pitch diameter issue
Calculation formulas for tooth gap types
Since the most rational tooth gap kinds through which the strain angle improvements in response to the elongation of a smoothly rotated roller chain with all the lapse of support 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 normal sprockets also have S-tooth profiles.