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Sprockets may be classified into typical sprockets, HK sprockets together with other sprockets.
1. Regular sprocket
Conventional sprockets are ANSI sprockets which can be engaged with normal series roller chains. See P125 for dimensions.
You can find two varieties of tooth profiles: U-tooth and S-tooth.
two. HK sprocket
HK sprockets is usually engaged with HK series roller chains, and people for single strand chains are identical to conventional sprockets. Having said that, sprockets for a number of strand chains are unique from conventional sprockets in sprocket tooth profile.
3. Other sprockets
Other sprockets are intended in accordance to the following calculation formulas to suit respective specialty chains.
The sprockets made use of for that following chains will be the exact same since the normal sprockets in tooth gap form, but distinctive in tooth thickness (sprocket tooth profile).
four. Calculation of sprocket dimensions
The dimensions of standard sprockets and various standard sprockets are calculated as follows. At first, the diameters of sprockets are calculated in the following calculation formulas.
Upcoming, sprocket tooth profile (the form with the tooth determined by its thickness) is calculated from the following calculation formulas. (The values shown while in the following pages were calculated by these formulas and thought to be the standard values.)
Calculation formulas for diameters and tooth gap kinds Calculation formulas for diameters
Calculation of pitch diameter, tip diameter and caliper diameter
The essential dimensions of a sprocket ideal for any chain pitch of one mm are respectively called pitch diameter factor, tip diameter element and caliper diameter factor. The respective aspects for respective numbers of teeth are listed beneath. If these aspects are multiplied by chain pitch, the fundamental dimensions of your corresponding sprocket can be obtained.
Instance:
Inside the situation of 80 (25.40 mm pitch) with 35 teeth Pitch diameter (Dp) = P×Pitch diameter issue
Calculation formulas for tooth gap types
Because the most rational tooth gap forms by which the strain angle improvements in response on the elongation of a smoothly rotated roller chain with the lapse of service time, ANSI specify two types of tooth profiles: U-type and S-type. Generally, S-type tooth profiles are adopted in accordance with ANSI, and our conventional sprockets also have S-tooth profiles.