20mm Linear Rod

Our 20mm linear rods are made of high-strength materials, featuring excellent hardness. Meanwhile, the surface is professionally treated for rust prevention, which can effectively resist environmental erosion. As a regular supply product, 20mm linear rods are widely used in the field of industrial automation, especially in various automatic transmission devices. For example, the transmission systems of industrial robots, the precise positioning mechanisms of automatic recorders, the linear motion components of computer equipment, the guide rail devices of precision printers, as well as special cylinder rods and other industrial automation machinery. They can provide reliable support for the stable operation and precise transmission of equipment.

For more details on linear shafts, click here to explore our full range of products.

Our 20mm linear rods are treated with chrome plating process, and the depth of the chrome plating layer exceeds 10μm, forming a dense anti-rust protective layer to effectively improve corrosion resistance. The supporting optical shafts are divided into two categories: hard shafts and soft shafts. The hardness of the hard shaft reaches about 58°, which is suitable for high-load precision transmission scenarios; the hardness of the soft shaft is about 25°, which is convenient for flexible assembly and adjustment

As a standard specification product, the 20mm linear rod supports customized cutting in length, with the maximum length up to 6 meters, which can fully meet the installation needs of different equipment. If you need shaft processing services, please provide drawings, and we will provide you with precise customized solutions.

For more product details or to obtain a quotation, please feel free to contact us. We look forward to providing reliable support for your industrial automation applications.

1. Product Features of 20mm Linear Rods

Our 20mm linear rods are crafted from high-strength materials and feature a precision chrome-plated surface (chrome layer thickness ≥10μm), providing excellent wear resistance and corrosion protection. With superior hardness (hard shafts ~58 HRC, soft shafts ~25 HRC) and outstanding stability, these rods perform reliably under demanding conditions, including high loads and humid environments.

2. Application Scenarios of 20mm Linear Rods

As essential components in industrial automation, 20mm linear rods are widely used in:

• Precision Transmission Systems: Drive shafts for industrial robot joints, high-precision positioning mechanisms for automated recorders, and linear motion elements in computer and measurement equipment.
• Automation Equipment: Guide rails for precision printers, piston rods for specialized pneumatic cylinders, and transmission shafts for automatic wood-plastic machines.
• Instruments and Meters: Support and transmission components for various precision instruments, helping extend equipment lifespan and reduce maintenance costs.

Customization & Factory Advantage: Our rods support length customization up to 6 meters and drawing-based processing, offering tailored solutions for automated production lines and specialized machinery. Direct factory production ensures the most competitive price without compromising quality, providing optimal reliability and precision for your equipment.

Contact now

Product Information

Product Information

Product Name

20mm Linear Rod

Material Characteristics

Forged from 45# high-carbon steel or bearing steel, integrating high-strength toughness and wear resistance to meet transmission requirements under diverse working conditions.

Dimension Parameters

Diameter: 20mm (standard specification)

Length: Customized cutting supported, flexibly adjustable as per customer needs, up to 6 meters maximum.

Surface Treatment Processes

Quenching Treatment: Surface quenching enhances hardness, with hard shaft hardness reaching up to 58° to improve load-bearing capacity.

Precision Polishing: Low surface roughness of the shaft ensures smooth transmission without jamming.

Electroplating Process: Chrome plating layer depth ≥10μm forms a rust-proof protective layer with excellent corrosion resistance.

Customized Processing Services

Secondary processing available based on drawings, including:

Thread machining, shaft end drilling, keyway/circlip groove milling.

Radial drilling, edge chamfering and other refined treatments to meet special assembly requirements.

Packaging Solutions

Standard Packaging: Sealed in plastic bags + reinforced with cartons/wooden boxes to prevent impact during transportation.

Customized Packaging: Special packaging solutions (e.g., shockproof, moisture-proof) available upon customer request.

Delivery Cycle

Sample Orders: 3-7 working days (including processing and quality inspection).

Bulk Orders: 7-30 working days (adjusted according to order quantity and process complexity).

Transportation Timeliness: Confirmed in advance based on actual logistics conditions.

For detailed technical parameters or customized solutions, please provide drawings and requirement specifications. We offer end-to-end services from material selection to after-sales delivery.

A Benchmark in Mechanical Transmission – 20mm Linear Shaft

In the field of mechanical transmission, our 20mm linear shaft sets the industry standard with full-chain quality control. From raw material selection to finished product inspection, every step is meticulously monitored to ensure precision performance.

Premium Material Selection: Laying a Solid Foundation
We carefully select 45# high-carbon steel or bearing steel as the base material. Through spectral analysis and mechanical property testing, we ensure that chemical composition, tensile strength, and hardness all exceed national standards, providing a robust foundation for high-precision transmission.

Precision Manufacturing: Micron-Level Accuracy
Equipped with imported German CNC lathes and high-precision grinding machines, we maintain a strict process control of 0.001mm:

• Turning Molding: High-speed cutting technology keeps diameter tolerance within ≤±0.01mm and cylindricity error <0.02mm/m.
• Precision Grinding: CNC cylindrical grinding achieves mirror-polished surfaces with Ra ≤0.8μm and straightness ≤0.05mm/m.
• Composite Processing: Functional structures such as keyways and threads are machined using five-axis linkage milling, with position tolerance ≤0.03mm.

Each process is calibrated in real time by experienced technicians using laser diameter measuring instruments, eliminating cumulative errors.

Comprehensive Quality Inspection: Zero-Defect Control
Our three-level inspection system guarantees millimeter-level precision:

• Dimensional Accuracy: A 0.001mm-level coordinate measuring machine scans 28 key parameters, including diameter, length, and keyway position, with deviation ≤0.005mm from CAD drawings.
• Form & Position Tolerance: Straightness detectors and roundness meters ensure full-length straightness ≤0.03mm and radial runout ≤0.01mm.
• Surface & Hardness Testing: Rockwell hardness testing verifies quenched layer hardness (58±2 HRC for hard shafts), while salt spray testing ensures chrome plating corrosion resistance (≥1000 hours).

From traceable raw materials to final product warehousing, each linear shaft is accompanied by a 23-item quality report, meeting the rigorous demands of high-end equipment such as industrial robots and precision machine tools under military-grade quality control standards.

Rich OEM Experience Accumulation

With years of deep involvement in the OEM field, we have accumulated practical project experience covering multiple industries, enabling efficient response to customers' customized production needs.

Hardware Customization Capability

Relying on a professional technical team, we provide full-process customization services from solution design to hardware development according to customers' specific scenarios and functional requirements.

One-stop Assembly Technical Support

Equipped with a senior technical team, we offer professional technical services from component assembly to complete machine debugging to ensure product delivery quality.

Efficient Supply Chain Guarantee

With product types covering diverse application scenarios, we achieve fast delivery through a mature supply chain system, shortening customers' project cycles.

Global Sales Network

We have built a sales channel system covering domestic and foreign markets, enabling timely response to the needs of customers in different regions and providing localized services.

Advanced Production Capacity Support

By introducing internationally leading production equipment and process technologies, we enhance production efficiency and product consistency through intelligent production lines.

Cost-effective Service Model

We provide market-competitive quotations with a factory direct sales price system, coupled with high-quality full-cycle services to achieve dual optimization of cost and experience.

Flexible Design Capability

According to customers' brand tone and functional requirements, we provide diversified design solutions, supporting personalized customization from appearance to structure.

Full-link Quality Control

Equipped with precision testing instruments and standardized quality inspection processes, we implement 100% full inspection for key products to ensure zero-defect delivery.

Hot Tags: 20mm linear rod, China 20mm linear rod manufacturers, suppliers, factory, 10mm Linear Rod, curved linear guide, linear guide motor, profile rail linear guides, 750mm linear rail shaft rod, 20mm Linear Rod