Sprockets is often classified into normal sprockets, HK sprockets and other sprockets.
1. Conventional sprocket
Standard sprockets are ANSI sprockets which may be engaged with common series roller chains. See P125 for dimensions.
You’ll find two styles of tooth profiles: U-tooth and S-tooth.
two. HK sprocket
HK sprockets is usually engaged with HK series roller chains, and people for single strand chains are identical to conventional sprockets. On the other hand, sprockets for a number of strand chains are unique from regular sprockets in sprocket tooth profile.
three. Other sprockets
Other sprockets are made in accordance to your following calculation formulas to suit respective specialty chains.
The sprockets made use of for that following chains are the similar because the standard sprockets in tooth gap form, but unique in tooth thickness (sprocket tooth profile).
4. Calculation of sprocket dimensions
The dimensions of standard sprockets and various general sprockets are calculated as follows. Initially, the diameters of sprockets are calculated through the following calculation formulas.
Upcoming, sprocket tooth profile (the form in the tooth based upon its thickness) is calculated in the following calculation formulas. (The values proven during the following pages had been calculated by these formulas and thought to be the common 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 ideal for any chain pitch of 1 mm are respectively called pitch diameter element, tip diameter component and caliper diameter element. The respective variables for respective numbers of teeth are listed beneath. If these components are multiplied by chain pitch, the essential dimensions of the corresponding sprocket could be obtained.
Instance:
From the situation of 80 (25.forty mm pitch) with 35 teeth Pitch diameter (Dp) ＝ P×Pitch diameter aspect
Calculation formulas for tooth gap kinds
Since the most rational tooth gap types through which the stress angle adjustments in response to the elongation of a smoothly rotated roller chain with the lapse of service time, ANSI specify two kinds of tooth profiles: U-type and S-type. In general, S-type tooth profiles are adopted in accordance with ANSI, and our conventional sprockets also have S-tooth profiles.