Sprockets may be classified into common sprockets, HK sprockets as well as other sprockets.
one. Conventional sprocket
Regular 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.
2. HK sprocket
HK sprockets might be engaged with HK series roller chains, and those for single strand chains are identical to normal sprockets. Even so, sprockets for several strand chains are unique from standard sprockets in sprocket tooth profile.
3. Other sprockets
Other sprockets are created according on the following calculation formulas to suit respective specialty chains.
The sprockets used for that following chains are the very same as the normal sprockets in tooth gap kind, but distinctive in tooth thickness (sprocket tooth profile).
four. Calculation of sprocket dimensions
The dimensions of regular sprockets as well as other general sprockets are calculated as follows. Initially, the diameters of sprockets are calculated in the following calculation formulas.
Next, sprocket tooth profile (the form of the tooth dependant upon its thickness) is calculated from the following calculation formulas. (The values proven in the following pages were calculated by these formulas and regarded as the standard values.)
Calculation formulas for diameters and tooth gap kinds Calculation formulas for diameters
Calculation of pitch diameter, tip diameter and caliper diameter
The basic dimensions of the sprocket appropriate to get a chain pitch of 1 mm are respectively named pitch diameter aspect, tip diameter factor and caliper diameter element. The respective variables for respective numbers of teeth are listed below. If these elements are multiplied by chain pitch, the basic dimensions with the corresponding sprocket may be obtained.
During the case of 80 (25.forty mm pitch) with 35 teeth Pitch diameter (Dp) = P×Pitch diameter aspect
Calculation formulas for tooth gap varieties
As the most rational tooth gap kinds by which the pressure angle changes in response for the elongation of a smoothly rotated roller chain together with the lapse of service 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 typical sprockets also have S-tooth profiles.