Sprockets might be classified into common sprockets, HK sprockets along with other sprockets.
one. Typical sprocket
Standard sprockets are ANSI sprockets which could be engaged with standard series roller chains. See P125 for dimensions.
There are two types of tooth profiles: U-tooth and S-tooth.
2. HK sprocket
HK sprockets might be engaged with HK series roller chains, and individuals for single strand chains are identical to standard sprockets. However, sprockets for numerous strand chains are unique from normal sprockets in sprocket tooth profile.
three. Other sprockets
Other sprockets are developed in accordance to your following calculation formulas to suit respective specialty chains.
The sprockets utilized for your following chains are the similar since the typical sprockets in tooth gap kind, but distinctive in tooth thickness (sprocket tooth profile).
four. Calculation of sprocket dimensions
The dimensions of normal sprockets and also other general sprockets are calculated as follows. To start with, the diameters of sprockets are calculated in the following calculation formulas.
Following, sprocket tooth profile (the form of your tooth determined by its thickness) is calculated from the following calculation formulas. (The values proven within the following pages were calculated by these formulas and thought to be the typical values.)
Calculation formulas for diameters and tooth gap forms Calculation formulas for diameters
Calculation of pitch diameter, tip diameter and caliper diameter
The essential dimensions of the sprocket ideal for a chain pitch of one mm are respectively termed pitch diameter issue, tip diameter aspect and caliper diameter component. The respective elements for respective numbers of teeth are listed beneath. If these components are multiplied by chain pitch, the fundamental dimensions with the corresponding sprocket might be obtained.
Instance:
In the situation of 80 (25.forty mm pitch) with 35 teeth Pitch diameter (Dp) ＝ P×Pitch diameter issue
Calculation formulas for tooth gap forms
As the most rational tooth gap types through which the stress angle adjustments in response towards the elongation of the smoothly rotated roller chain with 
all the lapse of support time, ANSI specify two kinds 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.
