Sprockets can be classified into common sprockets, HK sprockets together with other sprockets.
one. Regular sprocket
Common sprockets are ANSI sprockets which could be engaged with common series roller chains. See P125 for dimensions.
You will find two styles of tooth profiles: U-tooth and S-tooth.
2. HK sprocket
HK sprockets may be engaged with HK series roller chains, and people for single strand chains are identical to normal sprockets. On the other hand, sprockets for a number of strand chains are diverse from standard sprockets in sprocket tooth profile.
three. Other sprockets
Other sprockets are intended in accordance to the following calculation formulas to suit respective specialty chains.
The sprockets made use of for your following chains will be the exact same as the standard sprockets in tooth gap form, but diverse in tooth thickness (sprocket tooth profile).
four. Calculation of sprocket dimensions
The dimensions of regular sprockets and other common sprockets are calculated as follows. To start with, the diameters of sprockets are calculated from your following calculation formulas.
Next, sprocket tooth profile (the shape of your tooth based on its thickness) is calculated in the following calculation formulas. (The values proven within the following pages have been calculated by these formulas and regarded as 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 ideal for any chain pitch of 1 mm are respectively identified as pitch diameter issue, tip diameter factor and caliper diameter factor. The respective factors for respective numbers of teeth are listed under. If these aspects are multiplied by chain pitch, the essential dimensions on the corresponding sprocket may be obtained.
Illustration:
During the case of 80 (25.forty mm pitch) with 35 teeth Pitch diameter (Dp) ＝ P×Pitch diameter factor
Calculation formulas for tooth gap types
As the most rational tooth gap varieties in which the stress angle alterations in response to the elongation of a smoothly rotated roller chain with all the lapse of service time, ANSI specify two varieties of tooth profiles: U-type and S-type. In general, S-type tooth profiles are adopted in accordance with ANSI, and our common sprockets also have S-tooth profiles.