GB 1096

Attributes：

GB/T 1096 - 2003 specifies ordinary flat keys of type A (round - head), type B (flat - head) and type C (single - round - head) with a width b ranging from 2mm to 100mm.   The width tolerance of the flat key can be h8, the height tolerance can be h11, and the length tolerance can be h14.   The materials are usually carbon steel, stainless steel, etc.

Features：

The flat key relies on the two side surfaces as the working surfaces, and transmits torque through the extrusion with the side surfaces of the keyway.   It has good centering property, high positioning accuracy and is convenient for assembly and disassembly.   However, it is difficult to achieve the axial fixation of the parts on the shaft.   Among them, type A flat key is used for the shaft groove processed by the end - milling cutter, and the key is well axially fixed in the groove, but the stress concentration caused by the groove on the shaft is relatively large;   type B is used for the shaft groove processed by the disc - milling cutter, and the stress concentration of the shaft is relatively small;   type C is used for the shaft end.

Applications：

Ordinary flat keys are very widely used and are suitable for high - speed, high - precision or occasions subject to variable loads and impacts.   For example, in mechanical manufacturing, they are often used to fix rotating parts such as gears and sprockets on the shaft, to achieve the circumferential fixation between the shaft and the parts on the shaft and transmit torque, and have important applications in many fields such as automobiles, machine tools and motors.