Dimensions of Sprocket

Sprockets might be classified into conventional sprockets, HK sprockets as well as other sprockets.
1. Typical sprocket
Regular sprockets are ANSI sprockets which might be engaged with typical 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 is usually engaged with HK series roller chains, and people for single strand chains are identical to normal sprockets. However, sprockets for numerous strand chains are different from normal sprockets in sprocket tooth profile.
3. Other sprockets
Other sprockets are intended according on the following calculation formulas to suit respective specialty chains.
The sprockets utilised for your following chains will be the same because the typical sprockets in tooth gap type, but unique in tooth thickness (sprocket tooth profile).
4. Calculation of sprocket dimensions
The dimensions of standard sprockets and also other basic sprockets are calculated as follows. Initially, the diameters of sprockets are calculated from your following calculation formulas.
Following, sprocket tooth profile (the form with the tooth based on its thickness) is calculated from your following calculation formulas. (The values proven inside the following pages had been calculated by these formulas and regarded as the standard 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 suitable to get a chain pitch of 1 mm are respectively named pitch diameter aspect, tip diameter component and caliper diameter factor. The respective factors for respective numbers of teeth are listed under. If these aspects are multiplied by chain pitch, the fundamental dimensions with the corresponding sprocket could be obtained.
Instance:
From the situation of 80 (25.40 mm pitch) with 35 teeth Pitch diameter (Dp) ＝ P×Pitch diameter element
Calculation formulas for tooth gap forms
As the most rational tooth gap kinds during which the strain angle adjustments in response to your elongation of the smoothly rotated roller chain together with the lapse of service time, ANSI specify two sorts 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.