Precautions for choosing LM Plain shaft special standard shaft

For Linear Bearings, since steel balls move directly on the surface of the shaft,

attention should be paid to its hardness, surface thickness and dimensional accuracy when selecting.

Since the surface hardness of the shaft has a great influence on the life, 

please pay attention to the quality of the manufacturing material and the heat treatment method.

Material

Case-hardened materials suitable for high-frequency quenching manufacturing

GCr15 high carbon chromium bearing steel

Sk36 carbon tool steel

S55C carbon steel for mechanical machinery

etc. generally use the above materials.

In addition, corrosion-resistant martensitic stainless steel 9GCr18Mo/440C is also used in special cases

The surface hardness is above HRC58 (HV653), 

and the depth of the hardened buckle depends on the size of the linear bearing,

but it is generally recommended to use about 2mm.

Surface Roughness

In order to make it roll smoothly, please process it below 1.6S.