ep

December 30, 2020

Sprockets might be classified into standard sprockets, HK sprockets and other sprockets.
one. Common sprocket
Conventional sprockets are ANSI sprockets which could be engaged with common series roller chains. See P125 for dimensions.
There are actually two types of tooth profiles: U-tooth and S-tooth.
two. HK sprocket
HK sprockets is often engaged with HK series roller chains, and these for single strand chains are identical to normal sprockets. Having said that, sprockets for multiple strand chains are distinct from conventional sprockets in sprocket tooth profile.
3. Other sprockets
Other sprockets are built according on the following calculation formulas to suit respective specialty chains.
The sprockets made use of to the following chains will be the identical since the conventional sprockets in tooth gap form, but distinctive in tooth thickness (sprocket tooth profile).
4. Calculation of sprocket dimensions
The dimensions of regular sprockets as well as other common sprockets are calculated as follows. To start with, the diameters of sprockets are calculated through the following calculation formulas.
Subsequent, sprocket tooth profile (the shape in the tooth based upon its thickness) is calculated from your following calculation formulas. (The values shown inside the following pages were calculated by these formulas and regarded as the normal 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 ideal for any chain pitch of one mm are respectively called pitch diameter issue, tip diameter issue and caliper diameter issue. The respective aspects for respective numbers of teeth are listed under. If these variables are multiplied by chain pitch, the essential dimensions of your corresponding sprocket can be obtained.
Illustration:
Within the situation of 80 (25.40 mm pitch) with 35 teeth Pitch diameter (Dp) = P×Pitch diameter factor
Calculation formulas for tooth gap forms
Since the most rational tooth gap types in which the strain angle changes in response towards the elongation of a smoothly rotated roller chain with the lapse of support time, ANSI specify two varieties 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.