Sprockets might be classified into conventional sprockets, HK sprockets along with other sprockets.
1. Common sprocket
Normal sprockets are ANSI sprockets which might be engaged with normal series roller chains. See P125 for dimensions.
You will discover two varieties of tooth profiles: U-tooth and S-tooth.
two. HK sprocket
HK sprockets is usually engaged with HK series roller chains, and individuals for single strand chains are identical to normal sprockets. On the other hand, sprockets for a number of strand chains are distinct from common sprockets in sprocket tooth profile.
three. Other sprockets
Other sprockets are made in accordance towards the following calculation formulas to suit respective specialty chains.
The sprockets utilized for that following chains will be the exact same since the standard sprockets in tooth gap kind, but various in tooth thickness (sprocket tooth profile).
four. Calculation of sprocket dimensions
The dimensions of typical sprockets and also other common sprockets are calculated as follows. Initially, the diameters of sprockets are calculated from your following calculation formulas.
Following, sprocket tooth profile (the shape with the tooth depending on its thickness) is calculated from the following calculation formulas. (The values shown within the following pages had been calculated by these formulas and thought to be the standard values.)
Calculation formulas for diameters and tooth gap forms Calculation formulas for diameters
Calculation of pitch diameter, tip diameter and caliper diameter
The basic dimensions of the sprocket suitable for any chain pitch of 1 mm are respectively identified as pitch diameter component, tip diameter aspect and caliper diameter element. The respective elements for respective numbers of teeth are listed under. If these components are multiplied by chain pitch, the essential dimensions with the corresponding sprocket is usually obtained.
Instance:
Inside the situation of 80 (25.40 mm pitch) with 35 teeth Pitch diameter (Dp) ＝ P×Pitch diameter issue
Calculation formulas for tooth gap types
Since the most rational tooth gap varieties through which the stress angle changes in response on the elongation of a smoothly rotated roller chain together with the lapse of support time, ANSI specify two forms 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.