Selection And Application Scenarios of Transition with Tolerance Band

H / js class:

For easy disassembly, with additional locking force,

The eccentricity of the centering parts does not cause vibration;

It can replace the class H sliding fit when requiring a high centering accuracy.

apply:

Used for frequent disassembly and low coaxial requirements,

When the matching surface is very long, it can ensure a certain hole axis coaxial degree, loading or unloading with hand or wooden hammer.

Class H / k cooperation:

Widely used for centering, accurate and dismantling combination,

The average gap between the transition fit and the surplus fit is close to zero.

apply:

A positioning coordination with almost no gaps,

Where the impact load is not large, beat the hand.

H/m Class cooperation:

Called advanced centering coordination, the assembly is tight, good vibration resistance,

It is a transition fit with a high probability of surplus.

apply:

With average surplus transition fit, parts fit requirements are high, disassembly is difficult,

Copper hammer assembly, used in infrequently disassembled places.

H / n class cooperation:

Average surplus is larger than class H/m, with few gaps, due to strict eccentric requirements, bear load,

But should be added locking parts, disassembly is difficult, belong to accurate centering coordination.

apply:

Allow the high-precision positioning coordination with large surplus,

Can withstand a large torque, vibration and impact load, but all need to add auxiliary fasteners, high coaxial degree, excellent matching auxiliary tightness,

Disassembly is difficult and is often used for parts that are not removed after assembly.

transition fit H/pH / p fit only H8 / p7 is the transition fit, and the others are surplus fit.

apply:

H8 / p7 is the tighter transition fit, with only rarely having some gaps. When adding auxiliary fasteners, it can withstand great torque, vibration and impact load, and it is difficult to remove, only for the parts that will not be disassembled after assembly.