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Email: jeff@east-ai.cn

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Linear Motion Shaft

As a leading manufacturer and supplier with more than 15 years of professional experience, EASTAI specializes in manufacturing and exporting Linear Motion Shaft worldwide. Our commitment to quality and customer satisfaction has driven our success from China to the global market.

If you have any questions or need assistance, please feel free to contact us at jeff@east-ai.cn. Our professional team guarantees a response within one business day to ensure your needs are met in a timely and efficient manner.


Linear motion (LM) shafts are integral components extensively utilized across a diverse range of industrial applications, including robotics, electronic devices, guide rods, transmission shafts, and pillars. These shafts are pivotal in mechanical sectors such as electronics, packaging, chemical, medical, textile, printing, engineering, transportation, steel, and mining. Additionally, they play a crucial role in the functioning of hydraulic cylinders, operating rods, adjustment rods, linear motion systems, and automation devices.


Customized precision shafts, especially those that are induction hardened and can be hollow, cater to specific requirements, offering enhanced durability, strength, and wear resistance. This customization allows them to be tailored for various applications, further broadening their utility in light and heavy industries. Industries like hydraulic pneumatics, printing and packaging, textile printing and dyeing, die-casting machines, injection molding machines, and sliding devices benefit significantly from the specific attributes of these precision-engineered shafts.


Their widespread applicability underscores their importance in not only improving operational efficiency and reliability but also in driving innovation within industrial processes. Whether for intricate electronic devices or robust hydraulic systems, LM shafts and customized precision shafts are indispensable in the seamless operation of machinery, underscoring their essential role in modern industry.

Technical Parameter

SUPPLY CONDITON: Ordinary or chromium or nickel plating

CHROME: 20 to 30 micron


Chemical Composition

Chemical composition(%)
CK450.42-0.500.50-0.800.17-0.37≤0.035≤0.035 ≤0.25≤0.25 ≤0.25
20MnV60.17-0.241.30-1.700.10-0.50≤0.035≤0.0350.10-0.20≤0.30≤0.30 ≤0.30
40Cr0.37-0.450.50-0.800.17-0.37≤0.035≤0.035 ≤0.30≤0.30 ≤0.003
38MnVS60.34-0.411.20-1.600.15-0.800.02-0.06≤0.0250.08-0.20 ≤0.30≤0.08 

Mechanical Properties

Mechanical properties
MaterialTensile strengthYield pointElongationImpact energy



Tolerances on Diameter: ISO f7/f8

Ovality: Half of the specified tolerance

Straightness: For diameters less than 20mm, maximum deviation is 0.15 per 1000mm. For diameters greater than 20mm, maximum deviation is 0.1 per 1000mm.

Surface Hardness: Minimum 900HV; induction hardness ranges from HRC52 to HRC58.

Cohesion: No cracks, breaking, or detaching after thermal shock (heated to 300℃ and cooled in water).

Porosity: Testing conducted according to ISO 1456/1458, with results evaluated per ISO 4540, achieving a rating of 8-10.

Corrosion Resistance: Tested in natural salt spray as per ASTM B 117 for a duration of 120 hours.

Packing: Material is treated with anti-rust oil, each rod is then packed in a paper sleeve, followed by bubble film winding, and finally placed in a wooden case.

Certificate: Includes an inspection report, raw material certificate, and certificates for heat treatment and chrome plating.

If you are interested in purchasing one of our Linear Motion Shafts or need more information, please contact us at

Email: jeff@east-ai.cn

Tel & WhatsApp & Wechat  : +86 18306172624


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