Your Professional Linear Bearing Supplier
Zhejiang Siqiang Bearing Manufacturing Co., LTD. (brand name "SQ"), located in Lishui City, Zhejiang Province, CHINA, was established in 2007 and mainly produces linear bearings, linear guides and blocks, ball screws, joint bearings, and cam followers; Our factory covers 25,333 m² and operates over 200 CNC machines, including German-made equipment and fully automated production lines. With an annual capacity of more than 5 million units,Our professional R&D, production, and quality-control teams enable us to deliver reliable, precision-engineered products for global industrial applications.
-
![Flange Linear Bearing LMEK20LUU]()
Flange Linear Bearing LMEK20LUUPRODUCT NAME: FLANGE LINEAR BEARING. SIZE:LMEK20LUU. MATERIAL :BEARING STEEL GCR15. ID ( INNER DIAMTER):20MM -
![LMEF20LUU]()
-
![LMEK20UU]()
-
![LMH20LUU Nickel Plating]()
-
![LMK20LUU Nickel Plating]()
-
![LMH20LUU Stainless Steel]()
-
![LMK20LUU Stainless Steel]()
-
![LMF20LUU Stainless Steel]()
LMF20LUU Stainless SteelPRODUCT NAME: STAINLESS STEEL LONG TYPE FLANGE LINEAR BEARING. SIZE:LMF20LUU-SS. MATERIAL :Stainless steel . ID ( INNER DIAMTER):20MM. OD(OUTER DIAMTER):32MM. LENGTH:80MM. . -
![LMH20LUU]()
-
![Flange Linear Bearing LMF20LUU]()
Flange Linear Bearing LMF20LUUPRODUCT NAME: LONG TYPE FLANGE LINEAR BEARING. SIZE:LMF20LUU. MATERIAL :Bearing Steel GCR15. ID ( INNER DIAMTER):20MM. OD(OUTER DIAMTER):32MM. LENGTH:80MM. -
![LMH20UU Stainless Steel]()
LMH20UU Stainless SteelPRODUCT NAME: STAINLESS STEEL FLANGE LINEAR BEARING. SIZE:LMH20UU-SS. MATERIAL :SS304. ID ( INNER DIAMTER):20MM. OD(OUTER DIAMTER):32MM. LENGTH:42MM. -
![LMK20UU Stainless Steel]()
LMK20UU Stainless SteelPRODUCT NAME: STAINLESS STEEL FLANGE LINEAR BEARING. SIZE:LMK20UU-SS. MATERIAL :SS304. ID ( INNER DIAMTER):20MM. OD(OUTER DIAMTER):32MM. LENGTH:42MM.
Why choose us
Our Certificate
Our have ISO9001 Quality Certification System.ensuring consistent and reliable product performance.
Quality Control and Testing
A complete testing system and strict process control ensure stable quality, earning long-term trust and positive feedback from international clients.
Sales Market
We have exported to Asia, Europe, the Americas, and the Middle East, serving markets such as Germany, Italy, the U.S., products are well received in these markets.
Service Advantages
From pre-sales consultation and customized design to order tracking and after-sales support, we offer responsive and comprehensive service to reduce buyer risks.
LMH20LUU
The LMH20LUU linear ball bearing is a precision-engineered component designed for smooth, low-friction linear motion in a wide range of industrial and mechanical applications. These bearings are engineered to support radial and axial loads while maintaining high accuracy and durability.
Compact and Space-Efficient Design: The LMH20LUU features a streamlined profile that maximizes load capacity while minimizing space requirements. This makes it ideal for applications with tight installation constraints, such as compact automation systems and robotic arms, without compromising structural integrity or performance.
High-Quality Bearing Elements: Precision-ground steel balls and raceways are manufactured to strict tolerances to ensure smooth rolling motion and minimal vibration. These components are often heat-treated and polished to enhance surface finish, reducing wear and extending service life.
Non-Recirculating Ball Mechanism: Unlike recirculating linear guides, the LMH20LUU uses a non-recirculating ball design where balls move in a fixed path within the bearing block. This eliminates the need for complex return channels, reducing internal friction and noise. The point-contact configuration between balls and raceways ensures low resistance and high precision, ideal for sensitive positioning tasks.
Dimensional Interchangeability: The LMH20LUU is designed to meet international standards (e.g., ISO, JIS), allowing seamless replacement and compatibility with other linear motion components. This interchangeability simplifies maintenance and system upgrades, reducing downtime and inventory complexity.
Optimized Raceway Geometry: Advanced manufacturing techniques such as precision grinding and superfinishing are used to create ultra-smooth raceways. This reduces friction, minimizes wear, and improves load distribution across the balls, enhancing both dynamic performance and longevity.
Corrosion-Resistant Coatings (Optional): Many variants include protective coatings or plating (e.g., zinc-nickel, black oxide) to further improve resistance to moisture and chemicals, especially when used in humid or industrial washdown environments.
Types of LMH20LUU
High-Load LMH Series
Part of the robust LMH family, these bearings are designed for heavy-duty applications requiring superior load capacity.
01
Round Shaft LMH20LUU
Specifically engineered to run on precision-ground round shafts, ensuring smooth and consistent linear motion.
02
Profiled Guideway Bearings
These bearings are integrated into housings that align precisely with a matching profiled guideway for maximum accuracy.
03
Self-Aligning LMH20LUU
Features a design that allows slight pivoting to compensate for shaft misalignment and mounting inaccuracies.
04
Angular Contact Linear Bearings
Designed with raceways at an angle to the bearing axis, enabling superior support for combined radial and axial loads.
05
Applications of LMH20LUU
Automation & Industrial Machinery
Linear ball bearings like the LMH20LUU are integral to modern automation systems, where precision and repeatability are essential. They are commonly deployed in linear slides, robotic arms, pick-and-place machines, and conveyor systems to minimize friction and ensure consistent, smooth motion.
Transportation & Mobility Systems
Due to their ability to handle high loads while maintaining low rolling resistance, LMH20LUU bearings are used in various transportation and mobility applications, including electric scooters, industrial carts, marine equipment, and light rail systems.
Medical Equipment Applications
In the healthcare sector, precision and reliability are non-negotiable. The LMH20LUU is used in advanced medical devices such as MRI scanners, robotic surgical systems, patient positioning tables, and automated diagnostic equipment.
Machine Tools & Heavy Equipment
The LMH20LUU is frequently used in machine tool applications such as CNC routers, milling machines, and lathes, where it supports ball screws and linear shafts under heavy static and dynamic loads.
Material of LMH20LUU
Chrome Steel (52100 Bearing Steel)
Chrome steel, commonly known as 52100 bearing steel, is the most widely used material in industrial linear bearings due to its exceptional hardness, wear resistance, and fatigue strength. This high-carbon alloy steel contains approximately 1% carbon and 1.5% chromium, enabling it to be heat-treated to high hardness levels (typically 60–65 HRC).
Stainless Steel (e.g., 440C)
Stainless steel bearings, particularly those made from 440C grade, are preferred in environments where corrosion resistance is critical. With 16–18% chromium content and moderate carbon levels, 440C stainless steel can be hardened to provide a good balance between corrosion resistance and mechanical strength.
Plastic and Polymer Materials (POM, Nylon)
Polymer-based bearings are increasingly used where lightweight, electrical insulation, and chemical resistance are essential. Acetal (POM – Polyoxymethylene) is prized for its low coefficient of friction, excellent dimensional stability, and quiet operation, making it suitable for light-load automation systems.
Ceramic Materials (Silicon Nitride, Zirconia)
Ceramic materials like silicon nitride (Si₃N₄) are used in high-performance linear bearings for specialized applications. Ceramic balls or full ceramic assemblies offer exceptional hardness, minimal thermal expansion, and complete immunity to corrosion.
Replacement and Maintenance of LMH20LUU
Signs of Wear and Need for Replacement:
Monitor for increased friction, unusual noise (grinding or clicking), excessive vibration, or visible play in the bearing housing. Physical inspection may reveal corrosion, pitting on the inner raceway, or worn ball tracks—all indicators that replacement is necessary. A decline in equipment accuracy or responsiveness often correlates with bearing degradation.
Preventive Maintenance Practices:
Keep the bearing and surrounding components clean from dust, dirt, and moisture using a soft cloth or non-abrasive brush. Regular cleaning prevents abrasive particles from entering the bearing and causing internal damage. Lubricate according to the manufacturer’s specifications—typically with a light grease or oil suitable for linear motion systems. Over-lubrication can attract contaminants, while under-lubrication increases friction and wear.
Environmental Considerations:
In extreme temperature environments (both high and low), conduct more frequent inspections. High heat can degrade lubricants and cause thermal expansion, while cold temperatures may thicken lubricants and reduce mobility. In humid or corrosive environments, consider stainless steel or sealed versions of the bearing for enhanced durability.
Interchangeability and Replacement Options:
The LMH20LUU is functionally interchangeable with the LMH20UU and other 20mm linear ball bearings. The "L" in LMH20LUU typically indicates a locking mechanism (such as set screws), while the "UU" refers to double-sealed ends. When replacing, ensure compatibility with the shaft type, load requirements, and environmental conditions. Always refer to OEM specifications before substitution.
Safety Considerations During Installation and Operation
Prevent Bearing Failure Through Proper Maintenance:
Regular inspection and lubrication are vital to prevent premature wear. Check for signs of pitting, scoring, or misalignment during scheduled maintenance. Use manufacturer-recommended lubricants and apply them at specified intervals to maintain smooth operation and reduce friction-induced heat buildup.
Operational Safety Practices:
Never exceed the rated load capacity or misalign the bearing shaft, as this can cause binding, increased stress, and catastrophic failure. Always ensure the mounting surface is clean, flat, and properly aligned before installation. Additionally, sharp edges on bearing housings or rails may pose a cut hazard—handle with care and wear protective gloves during assembly.
Electrical Safety for Conductive Applications:
In environments where electric currents may pass through machinery (e.g., CNC machines or automated systems), it's crucial to prevent stray currents from flowing through the bearing. Electric arcing can lead to fluting, surface erosion, and eventual failure. Use insulated bearings, grounding rings, or conductive grease where necessary. Ensure proper grounding of equipment and avoid installing standard LMH20LUU bearings in high-current applications unless specifically designed for such use.
FAQ
As one of the most professional linear bearing manufacturers and suppliers in China, we're featured by quality products and good service. Please rest assured to wholesale customized linear bearing made in China here from our factory.
