Sprockets is often classified into standard sprockets, HK sprockets and various sprockets.
1. Normal sprocket
Normal sprockets are ANSI sprockets which could be engaged with conventional series roller chains. See P125 for dimensions.
You can find two types of tooth profiles: U-tooth and S-tooth.
2. HK sprocket
HK sprockets may be engaged with HK series roller chains, and those for single strand chains are identical to typical sprockets. Having said that, sprockets for various strand chains are unique from conventional sprockets in sprocket tooth profile.
3. Other sprockets
Other sprockets are created in accordance towards the following calculation formulas to suit respective specialty chains.
The sprockets employed for your following chains will be the similar since the typical sprockets in tooth gap form, but distinct in tooth thickness (sprocket tooth profile).
4. Calculation of sprocket dimensions
The dimensions of standard sprockets together with other basic sprockets are calculated as follows. At first, the diameters of sprockets are calculated from your following calculation formulas.
Following, sprocket tooth profile (the shape of your tooth dependant upon its thickness) is calculated through the following calculation formulas. (The values shown inside the following pages have been calculated by these formulas and regarded as the regular 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 suitable to get a chain pitch of 1 mm are respectively named pitch diameter component, tip diameter issue and caliper diameter factor. The respective components for respective numbers of teeth are listed below. If these things are multiplied by chain pitch, the basic dimensions from the corresponding sprocket can be obtained.
Instance:
From the situation of 80 (25.40 mm pitch) with 35 teeth Pitch diameter (Dp) ＝ P×Pitch diameter factor
Calculation formulas for tooth gap types
Since the most rational tooth gap kinds by which the pressure angle improvements in response to the elongation of a smoothly rotated roller chain with all the lapse of services time, ANSI specify two sorts of tooth profiles: U-type and S-type. Usually, S-type tooth profiles are adopted in accordance with ANSI, and our conventional sprockets also have S-tooth profiles.