Linear Shafts

Feida linear shafts are typically precision-machined cylindrical metal shafts.They feature high dimensional accuracy, good straightness and roundness, and a smooth surface finish and are commonly used together with bearings, linear bearings, and sliders to enable rotary or linear motion.Their key parameters typically include:

Outside diameter tolerance
Roundness
Straightness
Surface roughness
Concentricity
Surface hardness

Common Materials

The most common material for linear shafts is steel. Besides, stainless steel and aluminum alloys are also used.

Carbon Steel: Offers good strength and machinability at a relatively low cost, making it widely used in general mechanical equipment.

Stainless Steel: Its main advantage is excellent corrosion resistance.

Bearing Steel: Provides high hardness, excellent wear resistance, and good dimensional stability.It is suitable for applications that require higher precision, durability, and long service life.

Structural Characteristics

High Dimensional Accuracy

linear shafts need to work together with bearings and other components, so their diameter must generally meet relatively tight dimensional tolerances.

Good Straightness

Straightness is particularly important in linear motion applications.

Good Wear Resistance

The components often operate continuously with bearings, resulting in relative motion and friction. Therefore, both the material and surface treatment need to provide an appropriate balance between strength and wear resistance.

Smooth Surface

The components are usually precision-machined through processes such as grinding and polishing, resulting in a low surface roughness.

Machining Process

Feida Machinery produces linear shafts,following a documented quality management process under ISO 9001:2015.

The manufacturing steps:

Raw Materials→Forging→Turning→Heat Treatment→Grinding→Inspection→Packaging&shipping

Our quality control covers incoming raw material inspection (IQC), in-process monitoring (IPQC), finished product inspection (FQC), and outgoing inspection (OQC). Each batch is tested to ensure consistent product performance.

Linear Shafts vs. Linear Guide Rails

Application

Automation Equipment

Provide guidance for automatic loading and unloading mechanisms, material-handling systems, inspection machines, and other automation equipment.

3D Printers

Some 3D printers use linear shafts together with linear bearings to guide the movement of the print head or build platform.

Packaging Machinery

For applications such as packaging, labeling, and feeding that often require reciprocating linear motion, provide a simple and reliable guidance solution.

CNC and Mechanical Equipment

Used for auxiliary guidance, positioning, and motion support in certain machines where ultra-high precision is not required.

Laboratory and Inspection Equipment

Be an effective solution for applications that often require smooth and stable linear movement, such as laboratory instruments, measuring devices, and automated inspection systems

Why choose us?

About us: Jinjiang Feida Machinery Co., Ltd. Was founed in 1988.Covering an area of 45,000 square meters, We boasts a well-equipped professional team with over 150 employees, including more than 20 technical staffs and QC staffs. It is also supported by an experienced production and sales service team, providing solid guarantees for product R&D and innovation, quality control and customer service.

About custom service: We support OEM&ODM customization.Our customers just need to provide drawings or samples , and we are able to customize for them.

About samples: We can make samples before mass production.The sample lead time is about 10-15 days.