Sprockets is often classified into regular sprockets, HK sprockets and various sprockets.
1. Standard sprocket
Standard sprockets are ANSI sprockets which might be engaged with standard 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 could be engaged with HK series roller chains, and people for single strand chains are identical to normal sprockets. On the other hand, sprockets for many strand chains are diverse from typical sprockets in sprocket tooth profile.
3. Other sprockets
Other sprockets are created in accordance on the following calculation formulas to suit respective specialty chains.
The sprockets applied for the following chains are the very same since the normal sprockets in tooth gap kind, but distinctive in tooth thickness (sprocket tooth profile).
4. Calculation of sprocket dimensions
The dimensions of typical sprockets along with other basic sprockets are calculated as follows. To start with, the diameters of sprockets are calculated from your following calculation formulas.
Following, sprocket tooth profile (the shape from the tooth according to its thickness) is calculated through the following calculation formulas. (The values shown within the following pages had been calculated by these formulas and thought to be the common values.)
Calculation formulas for diameters and tooth gap types Calculation formulas for diameters
Calculation of pitch diameter, tip diameter and caliper diameter
The essential dimensions of a sprocket suitable for any chain pitch of 1 mm are respectively named pitch diameter component, tip diameter element and caliper diameter element. The respective components for respective numbers of teeth are listed under. If these aspects are multiplied by chain pitch, the fundamental dimensions of the corresponding sprocket can be obtained.
Illustration:
During the case of 80 (25.forty mm pitch) with 35 teeth Pitch diameter (Dp) ＝ P×Pitch diameter factor
Calculation formulas for tooth gap kinds
As the most rational tooth gap types through which the stress angle alterations in response for the elongation of the smoothly rotated roller chain with all the lapse of support time, ANSI specify two forms of tooth profiles: U-type and S-type. Usually, S-type tooth profiles are adopted in accordance with ANSI, and our conventional sprockets also have S-tooth profiles.