Sprockets may be classified into normal sprockets, HK sprockets along with other sprockets.
1. Typical sprocket
Standard sprockets are ANSI sprockets which could be engaged with common series roller chains. See P125 for dimensions.
You will find two kinds of tooth profiles: U-tooth and S-tooth.
two. HK sprocket
HK sprockets may be engaged with HK series roller chains, and these for single strand chains are identical to common sprockets. On the other hand, sprockets for numerous strand chains are distinct from regular sprockets in sprocket tooth profile.
three. Other sprockets
Other sprockets are created in accordance to your following calculation formulas to suit respective specialty chains.
The sprockets employed for the following chains would be the same as the typical sprockets in tooth gap form, but distinct in tooth thickness (sprocket tooth profile).
4. Calculation of sprocket dimensions
The dimensions of common sprockets and also other general sprockets are calculated as follows. In the beginning, the diameters of sprockets are calculated through the following calculation formulas.
Following, sprocket tooth profile (the form of your tooth based on its thickness) is calculated from your following calculation formulas. (The values proven from the following pages have been calculated by these formulas and regarded as the regular values.)
Calculation formulas for diameters and tooth gap varieties Calculation formulas for diameters
Calculation of pitch diameter, tip diameter and caliper diameter
The essential dimensions of a sprocket ideal for any chain pitch of 1 mm are respectively termed pitch diameter element, tip diameter issue and caliper diameter issue. The respective variables for respective numbers of teeth are listed under. If these elements are multiplied by chain pitch, the basic dimensions in the corresponding sprocket can be obtained.
Example:
Within the situation of 80 (25.forty mm pitch) with 35 teeth Pitch diameter (Dp) = P×Pitch diameter issue
Calculation formulas for tooth gap kinds
As the most rational tooth gap types in which the strain angle adjustments in response for the elongation of the smoothly rotated roller chain with all the lapse of services time, ANSI specify two sorts of tooth profiles: U-type and S-type. Usually, S-type tooth profiles are adopted in accordance with ANSI, and our normal sprockets also have S-tooth profiles.