Sprockets may be classified into regular sprockets, HK sprockets and various sprockets.
1. Regular sprocket
Standard sprockets are ANSI sprockets which may be engaged with normal series roller chains. See P125 for dimensions.
There are two types of tooth profiles: U-tooth and S-tooth.
two. HK sprocket
HK sprockets might be engaged with HK series roller chains, and those for single strand chains are identical to common sprockets. Having said that, sprockets for multiple strand chains are unique from standard sprockets in sprocket tooth profile.
three. Other sprockets
Other sprockets are built according to the following calculation formulas to suit respective specialty chains.
The sprockets used for the following chains would be the exact same since the standard sprockets in tooth gap type, but unique in tooth thickness (sprocket tooth profile).
four. Calculation of sprocket dimensions
The dimensions of conventional sprockets and various general sprockets are calculated as follows. To start with, the diameters of sprockets are calculated from your following calculation formulas.
Upcoming, sprocket tooth profile (the shape of your tooth dependant upon its thickness) is calculated through the following calculation formulas. (The values shown while in the following pages have been calculated by these formulas and thought to be the common values.)
Calculation formulas for diameters and tooth gap forms Calculation formulas for diameters
Calculation of pitch diameter, tip diameter and caliper diameter
The fundamental dimensions of a sprocket appropriate to get a chain pitch of 1 mm are respectively called pitch diameter factor, tip diameter issue and caliper diameter factor. The respective factors for respective numbers of teeth are listed below. If these aspects are multiplied by chain pitch, the fundamental dimensions from the corresponding sprocket is often obtained.
Example:
During the situation of 80 (25.40 mm pitch) with 35 teeth Pitch diameter (Dp) ＝ P×Pitch diameter aspect
Calculation formulas for tooth gap kinds
As the most rational tooth gap types during which the strain angle modifications in response for the elongation of a smoothly rotated roller chain together with the lapse of services time, ANSI specify two sorts of tooth profiles: U-type and S-type. Usually, S-type tooth profiles are adopted in accordance with ANSI, and our normal sprockets also have S-tooth profiles.