Precision Linear Shafts for Industrial Automation
Experience smooth, accurate, and reliable motion with DLY Linear Shafts. Crafted from high-quality materials and manufactured with strict tolerance control, our shafts reduce friction, resist wear, and ensure long-lasting performance. Perfect for CNC machines, robotics, and automated systems, DLY Linear Shafts deliver the precision your machinery demands.
All Linear shafts can be ordered in standard or custom lengths.
As a direct manufacturer, DLY keeps standard linear shaft sizes in regular stock, enabling stable supply and fast response for B2B buyers.
From batch orders to long-term cooperation, we are ready to support your projects with consistent quality and reliable delivery.
Why Choose Us
Zhejiang DLY Automation Manufacturing Co., Ltd.
Email:export@dlybearing.com
Quality Assurance
ISO-certified processes (ISO 9001, ISO 14001, ISO 45001)
Strict quality control at every stage of production
High-precision products that meet international standards
OEM one-stop solution
One-stop solution: Linear Shafts, Ball Screws, Linear Guides, and more
Customizable products to meet specific application needs
Extensive catalog with both standard and custom designs
Expertise & Experience
Over 20 years of experience in motion control solutions
Dedicated team of experts providing tailored technical consultation
In-depth industry knowledge across various sectors
Competitive Pricing
Factory-direct pricing for cost efficiency
Bulk discounts and flexible pricing models
Transparent and no-hidden-fees policy
Serving customers worldwide with timely, cost-effective solutions
Advantages of Linear Shaft
High Hardness
Treated by professional processes, showing excellent hardness performance.
Precision Grinding
Adopts precision grinding process to ensure dimensional accuracy and surface finish.
Rust & Corrosion Resistance
Surface treatment technology enhances anti-rust ability, adapting to various working conditions.
Wear Resistance & Durability
Combines wear resistance and corrosion resistance to extend service life.
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SHF Linear Bearing Shaft Support1.Type: End support block for linear shafts2.Models Available: SHF3, SHF4, SHF5, SHF6, SHF8, SHF10, SHF12, SHF13, SHF16, SHF20, SHF25, SHF30, SHF35, SHF40, SHF50, SHF603.Material: Aluminum alloy or -
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Round Linear Guide RailDLY Round Linear Guide Rail is designed to provide smooth, stable, and cost-effective linear motion for automation systems and light industrial equipment. Manufactured in our own factory with over 20 -
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SBR30 Linear ShaftHigh-rigidity supported shaft with aluminum baseStandard length up to 6000mm, custom lengths availableCompatible with SBR30UU bearing blocksIdeal for CNC machines, automation, and robotics -
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SBR25 Linear ShaftSBR25 Linear Shaft – 25mm Heavy-Duty RodEngineered for medium-to-heavy-duty machinery, the SBR25 Linear Shaft Rail ensures stable, smooth, and precise motion. Compatible with SBR25 Linear Rail -
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SBR16 Linear ShaftSBR16 Linear Shaft – 16mm Precision RodReliable, durable, and accurate, the SBR16 Linear Shaft Rail delivers smooth motion for CNC machines, automation, and industrial equipment. Hardened and -
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SBR12 Linear ShaftCompact, durable, and highly accurate, the SBR12 linear shaft provides smooth linear motion for miniature CNC machines, 3D printers, and automation equipment. Hardened and polished for long-lasting -
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SBR20 Linear RailThe DLY SBR20 linear rail is available in lengths up to 6000 mm per piece.Longer travel requirements can be met through precision rail jointing.For customized solutions, please contact DLY with your -
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Hollow Linear ShaftHollow Linear Shafts, also known as Hollow Linear Motion Shafts, are engineered for lightweight, high-precision linear motion applications. DLY manufactures a wide range of hollow shafts, ready for -
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3D Printer Linear Shaft1.Material: GCr15 (Bearing Steel)2.Hardness: HRC 62 ± 23.Precision (Tolerance): h6 / h7 / g64.Surface Roughness: Ra 0.4 – 0.8 μm5.Hardening Layer Depth: 0.6 mm – 3.5 mm6.Available Length: 1000 mm – -
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Supported Linear Shaft1.Supported Linear Shaft is a round linear shaft mounted on a full-length aluminum support base, commonly known as SBR or TBR linear guide rail, designed to improve rigidity and prevent shaft -
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![Linear Motion Shaft]()
Linear Motion ShaftLinear motion shafts are precision-engineered rods designed to provide smooth and accurate linear motion in a wide range of industrial automation and precision machinery applications.DLY is a
Linear Shafts Shape
Choose the right shaft profile to match your application, mounting method, and load demands.
DLY Linear Shafts are available in standard profiles, and we also offer customized end-machining options to fit your specific application needs.
In addition to standard solid shafts, we can provide:
- One-end stepped shafts
- Both-ends stepped shafts
- Hollow shafts
- Hollow shafts with one-end step
- Hollow shafts with both-ends step
Whether you require precision mounting surfaces, special thread structures, or unique end shapes, DLY delivers tailored shaft solutions to ensure precise installation and reliable performance.
What are the differences between different linear shafts?
Linear Motion Shafts
Design and Functionality: Linear motion shafts are designed to support and guide linear motion. They are typically straight rods with a smooth surface finish to reduce friction and wear. These shafts are often used in conjunction with linear bearings or bushings to enable smooth and precise linear movement.
Application Scenarios: Linear motion shafts are widely used in CNC machines, 3D printers, robotics, and other precision equipment where accurate and reliable linear motion is required.
Linear Bearing Shafts
Design and Functionality: Linear bearing shafts are a specific type of linear motion shaft that is optimized for use with linear bearings. They usually have a hardened and ground surface to ensure compatibility and longevity with linear bearings. These shafts provide low-friction, high-precision linear motion.
Application Scenarios: Linear bearing shafts are commonly found in industrial machinery, automation systems, and measurement instruments where high-precision linear motion is critical. They are often used in applications requiring high load-bearing capacity and smooth operation.
Linear Shaft Rods
Design and Functionality: Linear shaft rods are a more general term that can refer to any straight rod used for linear motion applications. They can vary widely in material, diameter, length, and surface finish depending on the specific requirements of the application. Some linear shaft rods may be designed for use with specific types of linear bearings or bushings, while others may be more versatile.
Application Scenarios: Linear shaft rods are used in a wide range of applications, from simple DIY projects to complex industrial machinery. Their versatility makes them suitable for various linear motion needs, including sliding mechanisms, guides, and supports.
Load-Bearing Capacity: Linear bearing shafts are often designed to withstand high radial and axial loads, making them suitable for heavy-duty applications. Linear motion shafts and linear shaft rods may have varying load-bearing capacities depending on the material, diameter, and design.
Application-Specific Features: Some linear shafts may have application-specific features, such as hollow designs for routing cables or pneumatic lines, or threaded ends for direct mounting of components. These features are typically more common in linear motion shafts and linear shaft rods that are designed for specific applications.
Specification of Linear Shaft
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Product Name |
Linear shaft |
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Materials |
High carbon steel, bearing steel. |
|
Diameter |
16mm |
|
Weight |
1.58 kg/m and depending on the length. |
|
Processing |
Surface hardened, polished, chrome plated. |
|
Dimensions |
Length can be adjusted according to customer's requirements. |
|
Color |
Google browser. |
|
Delivery time |
Sample order 3-7 days, bulk order 7-30 days. If your needs are urgent, welcome to contact our sales. |
Features of Linear Shaft
Round linear shafting typically use S55C steel as raw material, and the chrome-plated rods made from this material exhibit extremely excellent mechanical properties. When the surface of the steel for round linear shafting is treated by carburizing quenching process, its hardness is significantly improved, thus meeting the required surface hardness standards.
The flange of the round linear shafting is integrated with the bearing, reducing the radial space occupation (especially suitable for scenarios where the installation space is <20mm). The circular flange is directly fixed by bolts, simplifying the assembly process.
What are the Parts of the Linear Shaft?
Functional enhancement components
Guidance and support structure
Linear bearing mating surface: high-precision grindingsection, forming low friction sliding with the linear bearing.
Fixed section of support seat: The unpolished support area is fixed to the equipment through a support seat (such as flange type, box type).
Auxiliary function design
Central through-hole: used for threading wires or hydraulic pipelines (such as cable management in automation equipment).
Key-ways or splines: transmit torque to prevent relative rotation between the shaft and moving parts (such as CNC machine tools).
Infrastructure components
Shaft Body:
Material: Carbon steel (low-cost), stainless steel (corrosion-resistant), alloy steel (high-strength).
Diameter and length: Choose according to load requirements, such as precision equipment commonly used with a diameter of 8 to 50mm, and industrial machinery thatcan reach several meters.
Surface treatment:
Grinding: Ra 0.2-0.4 μ m, suitable for general precisionscenarios.
Hard chrome plating: Ra ≤ 0.1 μ m, improves wear resistance, such as in food machinery.
Polishing: Ra ≤0.05 u m, reduces friction, such as in semiconductor equipment
End Design:
Flat head: universal structure, suitable for standard installation.
Threaded end: Directly connect components, reducing installation steps (such as M6-M20 threads).
Step axis: Position bearings or supports to enhance systemrigidity.
Key performance parameters
Accuracy index:
Straightness: High end products can reach 0.01mm/m,ensuring stable motion trajectory.
Roundness and cylindricity: affect the accuracy of bearing fit,generally ≤0.005mm.
Load and lifespan:
Dynamic/Static Load: Calculated based on the material and diameter, such as a 25mm alloy steel shaft, it can with sustain dynamic load of 500kg
Fatigue life: The surface treatment and lubrication method determine that the service life of chrome plated shafts is 30% longer than that of ordinary shafts.
Structure Characteristics Of Linear Shaft
Zhejiang DLY automation Co.,Ltd.
Email:export@dlybearing.com
Infrastructure Design
Axis shape and material:
Linear motion shafts are typically cylindrical solid structures made of high carbon steel, bearing steel (GCr15), or stainless steel to ensure high strength and wear resistance.
Hollow shaft design can reduce weight and simplify structure, suitable for scenarios that require threading or lubrication, commonly used in linear shaft rod applications.
Surface treatment and precision:
The surface is subjected to high-frequency heat treatment and grinding processes to achieve high precision (IT6-IT9 level) and low roughness (Ra ≤ 1.5 μ m), ensuring smooth linear motion.
The straightness of the Linear bearing shaft is controlled within a length of 100mm, not exceeding 1.5 μ m, to reduce motion deviation and is suitable for high-precision equipment.
Functional Component Design
Supporting and guiding structures:
The mating surface of the linear motion shaft forms point contact rolling with the linear bearing, with low and stable friction, suitable for high-speed and high-precision motion.
The fixed section of the support seat of the Linear bearing shaft is fixed to the equipment through flanges or box structures to enhance rigidity.
Auxiliary function design:
The central through-hole of the Linear shaft rod is used for threading wires or hydraulic pipelines, and the integrated design improves space utilization.
Key-ways or splines are designed on linear motion shafts to transmit torque and prevent relative rotation between the shaft and moving parts.
Types and structural variants
Standard linear shaft:
The Linear motion shaft has a high-precision cylindrical surface, high coaxiality with bearings, and is easy to install, suitable for precision machine tools, textile machinery, etc.
Gap type linear shaft：
The outer sleeve of the Linear bearing shaft has an axial groove, which can be installed on a bearing seat with adjustable inner diameter to adjust the radial clearance and improve the radial working accuracy.
Open type linear shaft：
The outer ring of the Linear shaft rod has an opening, which is suitable for scenarios where the shaft is already fixed, preventing the shaft from bending. The structure is lightweight and cost-effective
Zhejiang DLY Automation Manufacturing Co., Ltd. has a construction area of over 30000 square meters .
It has a group of personnel who have been engaged in mechanical automation design, manufacturing, testing, and technical research and development for many years.
The company has introduced advanced production lines from around the world, including high-precision cold rolling machine tools, precision CNC guide rail grinders, precision CNC slider grinders, heat treatment machine tools, CNC precision thread grinding centers, turning milling composite machining centers, lead measuring instruments, high-precision projectors, precision profilometers, precision imagers, and other testing and manufacturing equipment.
We are a technology and technology enterprise specializing in the research, development, manufacturing, and marketing of rolling functional components, linear ball motion functional components, and automation machinery technology. The company has obtained over 60 patents, including 14 invention patents.
Zhejiang DLY Automation Manufacturing Co., Ltd. mainly produces Bearing steel optical shafts, High carbon steel optical shaft, linear motion guide, ball screw supports and other products. The company adheres to the business philosophy of "teamwork, focusing on excellence, winning with quality, creating first-class products, and ensuring customer satisfaction", adheres to the service tenet of "gaining trust from customers and serving the world", develops national green manufacturing industry, establishes Chinese brands, and sincerely cooperates with every domestic and foreign customer.
FAQ
Q: What are linear shafts?
A: Linear shafts are precision round bars used with linear bearings to guide smooth movement in machines.
Q: What is a linear motion shaft?
A: A linear motion shaft is another name for a linear shaft — it supports accurate straight-line motion in automation, CNC, and 3D equipment.
Q: Can I customize the ends of linear shafts?
A: Yes. We support customized machining such as stepped ends, threads, and holes based on your design.
Q: Do linear shafts need lubrication?
A: Yes. Proper lubrication helps reduce friction and extend shaft and bearing life.
Q: How to choose the right linear shaft size?
A: Select based on machine load, travel length, and matching linear bearing size.
Q: Are you a linear shaft manufacturer?
A: Yes. We are a professional linear shaft manufacturer, offering both standard linear shafts and custom linear motion shaft machining services.
Phone Number/Whatsapp:+8618957070963
Email:export@dlybearing.com
YOUTUBE:youtube.com/%40DLYlinearmotion
Facebook:www.facebook.com/DLYLinearMotion
Website:www.deliyalinearmotion.com
Zhejiang DLY Automation Manufacturing Co., Ltd. is well-known as one of the leading linear shaft manufacturers and suppliers in China. Please feel free to buy high quality linear shaft made in China here and get pricelist from our factory. For customized service and OEM/ODM service, contact us now.
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