Sprockets might be classified into common sprockets, HK sprockets as well as other sprockets.
one. Normal sprocket
Typical sprockets are ANSI sprockets which could be engaged with conventional series roller chains. See P125 for dimensions.
You will discover two kinds of tooth profiles: U-tooth and S-tooth.
two. HK sprocket
HK sprockets could be engaged with HK series roller chains, and those for single strand chains are identical to conventional sprockets. On the other hand, sprockets for multiple strand chains are distinctive from typical sprockets in sprocket tooth profile.
3. Other sprockets
Other sprockets are developed in accordance to your following calculation formulas to suit respective specialty chains.
The sprockets applied for your following chains will be the exact same because the conventional sprockets in tooth gap type, but distinctive in tooth thickness (sprocket tooth profile).
four. Calculation of sprocket dimensions
The dimensions of common sprockets and other standard sprockets are calculated as follows. At the outset, the diameters of sprockets are calculated through the following calculation formulas.
Next, sprocket tooth profile (the shape on the tooth based upon its thickness) is calculated in the following calculation formulas. (The values proven inside the following pages had been calculated by these formulas and thought to be the standard 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 ideal for any chain pitch of 1 mm are respectively named pitch diameter component, tip diameter aspect and caliper diameter issue. The respective variables for respective numbers of teeth are listed beneath. If these things are multiplied by chain pitch, the basic dimensions from the corresponding sprocket can be obtained.
Example:
During the situation of 80 (25.forty mm pitch) with 35 teeth Pitch diameter (Dp) ＝ P×Pitch diameter element
Calculation formulas for tooth gap varieties
Since the most rational tooth gap forms in which the pressure angle changes in response for the elongation of the smoothly rotated roller chain with all the lapse of services time, ANSI specify two types 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.