Double pitch sprocket means to double the pitch of the standard chain, but the other parameters are the same. So even if the universal standard 40 chain is used, it can be shared, but there are also double-pitch sprockets to choose from. In addition, the double-pitch chain has a large pitch, which is convenient to cooperate with accessories for fixing mesh belts or cross bars.
Algorithm of index circle of double pitch sprocket:
Draw a polygon by taking the pitch (double pitch) as the side length of the polygon and the number of teeth of the gear as the side number of the polygon. Then make its circumscribed circle on this polygon, the diameter of the circumscribed circle is the diameter of the index circle.
D=p/sin [(1-2/n) * 180], d——diameter of index circle, p——pitch (double pitch), n——number of chain teeth.
Double-pitch sprocket refers to a double-pitch standard chain, but its branches and other parameters are the same. Because the pitch becomes longer, it is only suitable for transportation. For example, 2040 is the same as a standard 40 chain, regardless of the thickness of the link plate, the outer diameter of the roller, and the width of the inner pitch.
Therefore, even if the universal standard 40 gear is used, it can be shared, but there are also double-pitch sprockets to choose from.
In addition, the double-pitch chain has a large pitch, which is convenient to cooperate with accessories for fixing mesh belts or cross bars.
Generally speaking, double-pitch chains are used in conveying systems and are not suitable for driving. Due to the increase in the width of the double-pitch chain plate, it is very suitable for installing auxiliary functions such as mesh belts and cross bars in the form of accessories.
The double pitch can be divided into two types: ordinary roller and large roller. The small drum directly uses the chain to advance on the track, and the large drum runs with the drum. But the same type of gears can be used for the small drum, and a separate sprocket is required for the large drum.