Sprockets may be classified into regular sprockets, HK sprockets together with other sprockets.
1. Normal sprocket
Conventional sprockets are ANSI sprockets which can be engaged with standard series roller chains. See P125 for dimensions.
There are actually two sorts of tooth profiles: U-tooth and S-tooth.
two. HK sprocket
HK sprockets is often engaged with HK series roller chains, and individuals for single strand chains are identical to typical sprockets. Nonetheless, sprockets for several strand chains are distinct from standard sprockets in sprocket tooth profile.
3. Other sprockets
Other sprockets are developed in accordance on the following calculation formulas to suit respective specialty chains.
The sprockets applied to the following chains are the exact same as the conventional sprockets in tooth gap type, but diverse in tooth thickness (sprocket tooth profile).
four. Calculation of sprocket dimensions
The dimensions of common sprockets and also other standard sprockets are calculated as follows. At first, the diameters of sprockets are calculated in the following calculation formulas.
Following, sprocket tooth profile (the form from the tooth determined by its thickness) is calculated from the following calculation formulas. (The values shown from the following pages had been calculated by these formulas and thought to be the normal values.)
Calculation formulas for diameters and tooth gap types Calculation formulas for diameters
Calculation of pitch diameter, tip diameter and caliper diameter
The essential dimensions of a sprocket ideal to get a chain pitch of one mm are respectively termed pitch diameter aspect, tip diameter issue and caliper diameter aspect. The respective factors for respective numbers of teeth are listed under. If these elements are multiplied by chain pitch, the fundamental dimensions with the corresponding sprocket may be obtained.
Example:
Within the situation of 80 (25.forty mm pitch) with 35 teeth Pitch diameter (Dp) ＝ P×Pitch diameter factor
Calculation formulas for tooth gap forms
Since the most rational tooth gap forms by which the stress angle modifications in response to your elongation of the smoothly rotated roller chain with the lapse of support time, ANSI specify two types of tooth profiles: U-type and S-type. Normally, S-type tooth profiles are adopted in accordance with ANSI, and our common sprockets also have S-tooth profiles.
