How to match the sprocket and shaft without a key

The sprocket is matched with the shaft, and there is no key. Considering the convenience of assembly and disassembly in the future, use a taper sleeve to match

One type is a two-way taper special sleeve, with hexagon socket screws uniformly distributed around the circumference. It is used for tightening, has large transmission force and is expensive. The sprocket hole is a straight hole

The other is a one-way taper sleeve with a hexagon socket screw on each side to tighten the sprocket shaft. The inner hole of the sprocket is also processed into a taper.

The heating and pressing method is used in the transmission parts in general mechanical design, which is against common sense

There are two methods for assembling precision bearings. The first is interference fit. The bearing is heated to about 150°C and assembled, and the other shaft head is frozen at about -10°C.

Ordinary bearing interference fit, lightly tapped with a copper hammer or jacked in