Sprockets might be classified into typical sprockets, HK sprockets and other sprockets.
one. Conventional sprocket
Common sprockets are ANSI sprockets which can be engaged with normal series roller chains. See P125 for dimensions.
There are actually two varieties 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 common sprockets. Having said that, sprockets for a number of strand chains are distinctive from conventional sprockets in sprocket tooth profile.
three. Other sprockets
Other sprockets are designed according on the following calculation formulas to suit respective specialty chains.
The sprockets made use of for that following chains are the identical because the conventional sprockets in tooth gap form, but diverse in tooth thickness (sprocket tooth profile).
four. Calculation of sprocket dimensions
The dimensions of standard sprockets as well as other general sprockets are calculated as follows. To start with, the diameters of sprockets are calculated from your following calculation formulas.
Following, sprocket tooth profile (the form with the tooth according to its thickness) is calculated from your following calculation formulas. (The values proven during the following pages had been calculated by these formulas and regarded as the typical 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 the sprocket ideal to get a chain pitch of 1 mm are respectively called pitch diameter issue, tip diameter element and caliper diameter component. The respective components for respective numbers of teeth are listed beneath. If these components are multiplied by chain pitch, the basic dimensions with the corresponding sprocket is often obtained.
Instance:
Inside the situation of 80 (25.40 mm pitch) with 35 teeth Pitch diameter (Dp) ＝ P×Pitch diameter aspect
Calculation formulas for tooth gap varieties
As the most rational tooth gap varieties by which the strain angle improvements in response on the elongation of the smoothly rotated roller chain with all the lapse of support time, ANSI specify two sorts of tooth profiles: U-type and S-type. Generally, S-type tooth profiles are adopted in accordance with ANSI, and our conventional sprockets also have S-tooth profiles.