What is the flange on the sprocket?
Between two flanges, add a gasket and tighten the bolt. The flange thickness of different pressure is different, and the bolts they use are different. Water pumps and valves, when connected to pipes, are locally made of these devices, also known as flanges, also known as flanges.
Where there are two surfaces around use bolt connection closed connection parts at the same time, generally referred to as the "flange", such as ventilation pipe connections, this kind of parts can be called "flange parts". But this connection is only a part of a device, such as a connection between a flange and a pump, and it is not good to call the pump "flanged parts". Smaller valves such as valves can be called "flanged parts".
According to the description, the fact of the time is that the roller of the chain is not fully meshed with the grooves of the sprocket wheel, which should be considered two points: One is that there is a possibility of error in the pitch of the chain. But the chain is standard, which is less likely. Second, there is an error in the tooth spacing of the sprocket, although the sprocket is very fine, but if it is small, it is usually the line cutting or milling cutter. It is easy to make sure that the pitch is cut or milling. The diameter of the dividing circle is not that good.
