Sprockets might be classified into standard sprockets, HK sprockets together with other sprockets.
1. Standard sprocket
Regular sprockets are ANSI sprockets which can be engaged with common series roller chains. See P125 for dimensions.
There are two sorts of tooth profiles: U-tooth and S-tooth.
2. HK sprocket
HK sprockets may be engaged with HK series roller chains, and those for single strand chains are identical to normal sprockets. Nevertheless, sprockets for multiple strand chains are distinct from common sprockets in sprocket tooth profile.
3. Other sprockets
Other sprockets are developed in accordance on the following calculation formulas to suit respective specialty chains.
The sprockets utilized to the following chains will be the same since the standard sprockets in tooth gap kind, but distinctive in tooth thickness (sprocket tooth profile).
4. Calculation of sprocket dimensions
The dimensions of regular sprockets as well as other general sprockets are calculated as follows. In the beginning, the diameters of sprockets are calculated in the following calculation formulas.
Following, sprocket tooth profile (the shape with the tooth determined by its thickness) is calculated from your following calculation formulas. (The values proven in the following pages were calculated by these formulas and thought to be the typical values.)
Calculation formulas for diameters and tooth gap varieties Calculation formulas for diameters
Calculation of pitch diameter, tip diameter and caliper diameter
The basic dimensions of the sprocket appropriate for any chain pitch of 1 mm are respectively named pitch diameter component, tip diameter component and caliper diameter issue. The respective elements for respective numbers of teeth are listed beneath. If these aspects are multiplied by chain pitch, the fundamental dimensions on the corresponding sprocket may be obtained.
Example:
Within the situation of 80 (25.40 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 by which the strain angle changes in response to your elongation of the smoothly rotated roller chain using 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 normal sprockets also have S-tooth profiles.