Sprockets is often classified into standard sprockets, HK sprockets along with other sprockets.
1. Standard sprocket
Conventional sprockets are ANSI sprockets which may be engaged with regular series roller chains. See P125 for dimensions.
You will discover two varieties of tooth profiles: U-tooth and S-tooth.
two. HK sprocket
HK sprockets is often engaged with HK series roller chains, and individuals for single strand chains are identical to typical sprockets. However, sprockets for numerous strand chains are diverse from common sprockets in sprocket tooth profile.
three. Other sprockets
Other sprockets are developed in accordance for the following calculation formulas to suit respective specialty chains.
The sprockets applied for your following chains would be the similar as the typical sprockets in tooth gap type, but distinct in tooth thickness (sprocket tooth profile).
4. Calculation of sprocket dimensions
The dimensions of regular sprockets along with other general sprockets are calculated as follows. At the outset, the diameters of sprockets are calculated from the following calculation formulas.
Following, sprocket tooth profile (the shape of your tooth based on its thickness) is calculated in the following calculation formulas. (The values shown within the following pages have been calculated by these formulas and regarded as the conventional 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 a sprocket appropriate to get a chain pitch of 1 mm are respectively named pitch diameter issue, tip diameter element and caliper diameter element. The respective factors for respective numbers of teeth are listed under. If these aspects are multiplied by chain pitch, the essential dimensions of the corresponding sprocket could be obtained.
Example:
Inside the case of 80 (25.40 mm pitch) with 35 teeth Pitch diameter (Dp) ＝ P×Pitch diameter issue
Calculation formulas for tooth gap types
Because the most rational tooth gap types during which the stress angle improvements in response for the elongation of the smoothly rotated roller chain together with the lapse of support time, ANSI specify two types of tooth profiles: U-type and S-type. Generally, S-type tooth profiles are adopted in accordance with ANSI, and our normal sprockets also have S-tooth profiles.