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Linear shaft manufacturers & suppliers

Through more than 23 years development, now BOS Hydraulic have 3 factories,1 research center and 1 sales center. More than 100 customers from 40 countries and regions have established long-term business relationships with us. Products are certificated by national and international authority.
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Precision Ground Shafts

Precision Ground Shafts are high-tolerance components manufactured through centerless grinding to achieve exceptional straightness, diameter consistency and surface finish. These shafts provide rigid linear guidance in motion systems, demonstrating superior wear resistance and reliable performance. They are fundamental elements in automation equipment, precision machinery and linear bearings where exact dimensional accuracy and smooth operation are critical requirements.

Precision Ground Shafts Series

Advantages of Linear Shaft Rod

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Leading technical expertise
Exquisite craftsmanship guarantees the long-lasting and stable quality of products
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Strict quality management system
BOS promise to manufacture and deliver strictly according to the drawing specifications
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Complete customization capabilities
BOS provides a full range of customized services
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Technical Support
Professional engineers with more than 20 years of experience always serving you.

Bos Linear Shaft Rod first choice

With years of experience in manufacturing linear shafts, we provide customer satisfaction through manufacturing and customization.

At Bos, we care about you and your company. We specialize in the customization, material selection, and manufacturing of linear shafts, and provide excellent services according to your needs.

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Precision Ground Shafts:
The Foundation of Accurate Linear Motion

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A Precision Ground Shaft is far more than a simple bar of steel; it is a meticulously engineered component designed to serve as a guiding element in linear motion systems. Its primary function is to provide a near-perfectly straight, round, and smooth surface for linear bearings to traverse upon, thereby ensuring smooth, low-friction, and repeatable movement. The journey of our Precision Ground Shafts begins with the selection of high-carbon or low-alloy steels, chosen for their inherent stability and mechanical properties. These raw materials are then transformed through a sophisticated centerless grinding process. This advanced grinding technique is what grants our Precision Ground Shafts their exceptional dimensional accuracy, outstanding straightness, and remarkably consistent diameter along the entire length.
As a specialist manufacturer with a profound dedication to metallurgical excellence and precision engineering, we have established ourselves as a leading global Precision Ground Shafts Supplier. Our mission extends beyond mere component supply; we provide the foundational elements for critical motion systems, where even micron-level deviations are unacceptable. We understand that the performance of your high-speed automation equipment, precision machine tools, and sophisticated measuring instruments hinges on the integrity of the Precision Ground Shafts within them. Consequently, our manufacturing philosophy is built upon a triad of unwavering principles: superior material selection, state-of-the-art grinding technology, and rigorous quality assurance, ensuring that every shaft we deliver is a paragon of geometric perfection and enduring performance.
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Where Our Precision Ground Shafts Drive Innovation

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The unparalleled accuracy and reliability of our Precision Ground Shafts make them indispensable across a vast spectrum of industries. In the world of industrial automation, they are the backbone of robotic arms, linear actuators, and pick-and-place systems, where high-speed and repeatable positioning are critical. The machine tool industry relies on them as guide rails and spindle components for milling machines, lathes, and grinders, where rigidity and resistance to deflection under load are paramount. Beyond these, our Precision Ground Shafts are vital in the medical device sector for diagnostic equipment, in the packaging industry for high-speed filling and capping machines, and in the aerospace field for navigation and control systems. This broad applicability is a testament to our ability to provide both standard and highly customized Precision Ground Shafts tailored to the unique challenges of each application, whether it involves extreme temperatures, corrosive environments, or ultra-high-vacuum conditions.

The Distinctive Advantages of Our Manufacturing Prowess

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Selecting our Precision Ground Shafts translates into a host of tangible benefits for your products and processes. The foremost advantage is the Guarantee of Dimensional Accuracy and Stability. Our rigorous grinding and finishing processes ensure tight tolerances on diameter, often within a few microns, which is fundamental for preventing play and ensuring precise alignment in linear motion systems. Secondly, our shafts exhibit Superior Surface Integrity. The exceptional surface finish not only reduces friction and wear but also enhances corrosion resistance, a property that can be further boosted with additional treatments such as hard chrome plating. Third, we provide Exceptional Straightness and Geometric Consistency. This is critical for ensuring smooth, stick-slip-free motion and preventing premature bearing failure, thereby maximizing the mean time between failures (MTBF) for your machinery. Finally, our commitment to Material Excellence means that our Precision Ground Shafts possess high hardness and excellent wear characteristics, often achieved through heat treatment or the use of high-grade materials, ensuring they stand up to the demands of continuous operation.

Details and Applications of Linear Shaft

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Linear Shaft Rod is used as a motion platform for laser measurement equipment and semiconductor wafer inspection equipment.

Linear Shaft Rod China's Best Manufacturer

Bos Hydraulic, with its leading technical expertise, strict quality management system, continuous R&D investment, and efficient service team, has won wide recognition and trust from domestic and foreign markets, becoming an outstanding brand in the Linear Shaft Rod industry
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Bos Linear Shaft Rod Manufacturers

Linear Shaft Rod – The Ultimate FAQ Guide

A Linear Shaft Rod is a precision-ground component that provides guided linear motion in machinery. Typically made from hardened steel or stainless steel with a hard chrome-plated finish, it offers high rigidity, excellent wear resistance, and corrosion protection. Its superior straightness and smooth surface ensure minimal friction and reliable performance in automation systems, bearing guides, and support applications.
What materials are commonly used for Linear Shaft Rods?

The most common materials are high-carbon chromium steel (like SUJ2/52100), which is hardened and chrome-plated for optimal wear resistance. For corrosive environments, stainless steel (such as SUS304 or 440C) is used, offering excellent corrosion resistance though with generally lower hardness than hardened steel.


Why is surface hardness important for a Linear Shaft Rod?

High surface hardness (e.g., 58-65 HRC) is crucial for resisting abrasion from linear bushings. A hard surface minimizes wear, prevents galling, and significantly extends the service life of both the rod and the mating bearing, ensuring long-term precision.

How do I interpret tolerance grades like g6 or h6?

These are international tolerance grades for shafts. A grade like g6 indicates a sliding fit, perfect for applications requiring precise movement with minimal play. h6 is a precision location fit, offering very tight tolerances for high-accuracy systems. The choice depends on your required balance of freedom of movement and positional accuracy.


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