Sprockets could be classified into common sprockets, HK sprockets and also other sprockets.
1. Conventional sprocket
Normal sprockets are ANSI sprockets which can be engaged with typical 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 might be engaged with HK series roller chains, and these for single strand chains are identical to typical sprockets. Having said that, sprockets for a number of strand chains are diverse from normal sprockets in sprocket tooth profile.
3. Other sprockets
Other sprockets are made according towards the following calculation formulas to suit respective specialty chains.
The sprockets utilised for the following chains would be the exact same because the conventional sprockets in tooth gap type, but diverse in tooth thickness (sprocket tooth profile).
4. Calculation of sprocket dimensions
The dimensions of typical sprockets together with other general sprockets are calculated as follows. To start with, the diameters of sprockets are calculated from the following calculation formulas.
Next, sprocket tooth profile (the shape in the tooth according to its thickness) is calculated from your following calculation formulas. (The values shown in the following pages were calculated by these formulas and thought to be the normal 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 called pitch diameter issue, tip diameter component and caliper diameter component. The respective things for respective numbers of teeth are listed under. If these variables are multiplied by chain pitch, the fundamental dimensions on the corresponding sprocket may be obtained.
Instance:
Inside the situation of 80 (25.forty mm pitch) with 35 teeth Pitch diameter (Dp) ＝ P×Pitch diameter component
Calculation formulas for tooth gap kinds
As the most rational tooth gap kinds by which the pressure angle alterations in response on the elongation of a smoothly rotated roller chain with all the lapse of support time, ANSI specify two types of tooth profiles: U-type and S-type. Generally, S-type tooth profiles are adopted in accordance with ANSI, and our common sprockets also have S-tooth profiles.