The convex key type inflation shaft (pneumatic shaft) is a key bar type inflation shaft. The main body of this type of inflation shaft is made of high-quality steel pipe, coated with hard chrome on the surface, with aluminum convex keys, which can expand and contract freely. It is equipped with high-quality rubber inner liner and quick filling and exhaust nozzle, with good sealing effect, detachable shaft head, easy maintenance, and long service life. The convex key inflatable shaft has been widely used in mechanical winding and unwinding processes such as slitting, compounding, printing, coating, bag making, and papermaking, effectively improving work efficiency and overall product quality.

The convex key inflatable shaft (key type pneumatic shaft) is not in stock and is customized according to the dimensions or drawings provided by the customer. When customizing this product, the user needs to provide the external dimensions, nozzle position, and important dimensional tolerances of the shaft head. If axial intake is used, the outer diameter of the air nozzle installation shaft head should be larger than 35mm, etc.