Sprockets is often classified into normal sprockets, HK sprockets together with other sprockets.
1. Regular sprocket
Typical sprockets are ANSI sprockets which could be engaged with standard series roller chains. See P125 for dimensions.
You will discover two types of tooth profiles: U-tooth and S-tooth.
two. HK sprocket
HK sprockets can be engaged with HK series roller chains, and these for single strand chains are identical to conventional sprockets. Nonetheless, sprockets for many strand chains are diverse from conventional sprockets in sprocket tooth profile.
three. Other sprockets
Other sprockets are designed in accordance to your following calculation formulas to suit respective specialty chains.
The sprockets used for that following chains are the identical since the conventional sprockets in tooth gap form, but various in tooth thickness (sprocket tooth profile).
four. Calculation of sprocket dimensions
The dimensions of common sprockets and other general 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 from the tooth determined by its thickness) is calculated from your following calculation formulas. (The values proven from the following pages have been calculated by these formulas and thought to be the common values.)
Calculation formulas for diameters and tooth gap varieties Calculation formulas for diameters
Calculation of pitch diameter, tip diameter and caliper diameter
The basic dimensions of the sprocket appropriate for any chain pitch of one mm are respectively identified as pitch diameter issue, tip diameter factor and caliper diameter issue. The respective elements for respective numbers of teeth are listed below. If these things are multiplied by chain pitch, the fundamental dimensions of the corresponding sprocket is usually obtained.
Instance:
During the case of 80 (25.forty mm pitch) with 35 teeth Pitch diameter (Dp) ＝ P×Pitch diameter issue
Calculation formulas for tooth gap kinds
Because the most rational tooth gap forms in which the stress angle changes in response towards the elongation of the smoothly rotated roller chain using the lapse of support time, ANSI specify two types 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.