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Your Professional Flange 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.

 
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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.

 

Flange Linear Bearing LMF20LUU

 

 

A Flange Linear Bearing LMF20LUU is a precision mechanical component designed to facilitate smooth, low-friction linear motion in industrial and automation applications. Constructed using high-grade steel and precision-engineered ball circuits, these bearings are known for their durability, load capacity, and operational efficiency. The manufacturing process begins with the careful selection of robust materials, followed by precision machining and heat treatment to ensure dimensional accuracy and long-term performance.

 

 

Advantages of Flange Linear Bearing LMF20LUU

Precision Engineering: Designed to maintain tight tolerances, ensuring consistent linear motion critical for high-accuracy applications.

 

Self-Aligning Capability: Compensates for minor misalignments in mounting surfaces, reducing stress and extending service life.

 

Corrosion Resistance: Often made with stainless steel or coated components, making them suitable for humid or washdown environments.

 

Low Maintenance: Sealed design protects internal balls from contamination, reducing the need for frequent lubrication.

 

Easy Integration: Compatible with standard linear shafts and mounting configurations, simplifying retrofitting and system upgrades.s.

LMEF20LUU

 

Type of Flange Linear Bearing LMF20LUU
 

External Precise Linear Ball Bearings

Engineered for high-accuracy applications, these bearings feature tightly controlled dimensional tolerances and superior surface finish. The external precision design ensures the bearing aligns perfectly with the shaft, minimizing play and enhancing motion stability.

Open Linear Ball Bearings

As the name suggests, open linear bearings lack protective seals or shields, exposing the internal ball circuit. This design allows direct access to the ball retainer for cleaning, inspection, and re-lubrication, making maintenance straightforward.

Fixed Center Linear Ball Bearings

Designed with a precisely centered raceway, these bearings ensure consistent alignment between the shaft and housing. The fixed center configuration minimizes radial play and prevents misalignment during operation, which is critical in high-precision applications.

 

 
Applications of Flange Linear Bearing LMF20LUU
 
01/

Robotics

In robotic systems, the Flange Linear Bearing LMF20LUU plays a vital role in enabling precise and smooth linear motion in robotic arms, joints, and actuators. These bearings are especially valuable in automated manufacturing lines where repetitive, high-speed movements must be executed with minimal friction and maximum repeatability.

02/

Packaging Machines

High-speed packaging machines rely on Flange Linear Bearing LMF20LUU to guide conveyors, sealing heads, filling nozzles, and labeling systems. These components require consistent, low-friction movement to ensure accurate product handling, alignment, and packaging integrity.

03/

Construction and Mining Equipment Guide Rails

Although typically associated with lighter automation, Flange Linear Bearing LMF20LUU(or their reinforced variants) are also integrated into guide rail systems of construction and mining machinery such as excavators, loaders, and bulldozers—especially in auxiliary control mechanisms and cabin adjustment systems.

04/

Machine Tools

In precision machining equipment like lathes, grinders, and milling machines, linear bearings such as the Flange Linear Bearing LMF20LUU are employed in feed mechanisms, tool carriages, and worktable slides. They ensure accurate positioning of cutting tools and workpieces, directly influencing the surface finish and dimensional accuracy of machined parts.

05/

3D Printers

In desktop and industrial 3D printers, the LMF20LUU bearing is commonly used to support the X, Y, and Z-axis motion systems. It guides the print head and build platform along smooth, precise paths, which is essential for achieving fine layer resolution and dimensional accuracy in printed objects.

06/

CNC Machines

Computer Numerical Control (CNC) machines utilize Flange Linear Bearing LMF20LUU in axis drive systems to guide cutting tools and workholding fixtures. These bearings ensure that movements along the machine axes are precise, repeatable, and free of play, which is critical when machining complex geometries or tight-tolerance parts.

 

LMH20LUU Stainless Steel

 

Specifications of Flange Linear Bearing LMF20LUU

Seal Type

The LMF20LUU features an integrated omnidirectional seal that fully encloses the internal components, protecting them from dust, dirt, moisture, and other environmental contaminants. This sealed design significantly enhances the bearing’s reliability and extends operational life by minimizing particle intrusion that can cause wear or premature failure.

 

Raceway Material

The raceways of the LMF20LUU are precision-ground from hardened chrome steel (typically SUJ2 or equivalent), providing excellent hardness, wear resistance, and fatigue strength. This high-grade material ensures dimensional stability and smooth ball movement even under repeated load cycles.

 

Ball Material

The rolling elements (balls) inside the LMF20LUU are also manufactured from high-purity chrome steel, matching the raceway material to ensure compatibility and minimize differential wear. These precision balls are polished to extremely tight tolerances, enabling smooth, quiet, and accurate linear travel.

 

Cage Material

The ball retainer or cage in the LMF20LUU is made from a durable polymer composite, typically glass-reinforced nylon or POM (polyoxymethylene). This lightweight yet strong material evenly spaces the balls and prevents contact between them, reducing friction and heat generation.

 

Installation Guide

 

Clean and Prepare the Shaft

Wipe the linear shaft thoroughly with a lint-free cloth and isopropyl alcohol or a manufacturer-approved cleaner. Ensure the shaft surface is free of debris, oil residue, or burrs. Verify that the shaft diameter matches the bearing bore (20mm nominal) and meets surface finish requirements (Ra ≤ 0.2–0.4 µm recommended).

 

Fit the Bearing onto the Shaft

Align the bearing perpendicular to the shaft and gently slide it on from one end. Apply a thin layer of compatible lubricant (e.g., lithium-based grease) to the shaft to reduce friction during installation. Never hammer or force the bearing—excessive pressure or impact can deform the housing or damage internal components.

 

Secure the Bearing to the Mounting Block

Attach the bearing housing to the mounting block using the specified screws (usually M4 or M5 depending on model). Torque the fasteners evenly and according to manufacturer recommendations to prevent warping or misalignment. Ensure the bearing is firmly fixed without any rotational or lateral play.

 

Align the Assembled Unit

Once mounted, align the bearing-shaft assembly with the rest of the machine frame. Use precision alignment tools if necessary to ensure the shaft runs parallel to guide rails or other moving parts. Misalignment causes edge loading and accelerates wear.

 

Movement Testing

Manually move the shaft or carriage through its full range of motion. The movement should be smooth and consistent, with no binding, resistance, or abnormal noise. If resistance is felt, recheck alignment, cleanliness, and mounting integrity.

 

 

Maintenance and Care
 
 
 

Keep the Bearings Lubricated

Although pre-lubricated, periodic relubrication extends service intervals—especially in continuous-use or high-load applications. Bearings with relubrication ports or semi-sealed designs allow for easy grease injection. Follow the manufacturer’s schedule based on operating hours and environmental conditions.

 
 

Use the Correct Lubricant

Select a high-quality, low-noise grease suitable for linear bearings. For high-temperature environments, use a thermally stable grease with low volatility. In low-speed or static-load scenarios, opt for higher-viscosity greases to maintain film strength. Always remove old grease before applying new lubricant to prevent contamination.

 
 

Perform Regular Inspections

Monitor bearings for signs of wear, including rough operation, unusual noises (grinding, clicking), excessive play, or overheating. Visually inspect seals for cracks or deformation. Replace bearings at the first sign of degradation to avoid machine downtime or damage to adjacent components.

 
 

Clean the Bearings When Necessary

If exposed to heavy contamination, clean the exterior and accessible areas with a mild solvent approved by the manufacturer. Avoid high-pressure washing or aggressive chemicals that could degrade seals or wash out internal lubrication. In extreme cases, disassembly and ultrasonic cleaning may be performed—but only if the bearing is designed for serviceability.

 

 

FAQ

Q: What is your latest delivery time?

A: If the goods are in stock, usually 5-10 days. Or if the goods are not in stock, it is 15-20 days, which is based on the quantity.

Q: Does your company have quality assurance?

A: Yes, for 2 years.

Q: What is the competitiveness of your company's products compared to other companies?

A: High precision, high speed, low noise.

Q: Which payment method does your company support?

A: 30% Deposit,balance payment before delivery.

Q: What is your terms of payment ?

A: A.100%T/T
B.30%T/T in advance,70% aganist copy of B/L(For large order)
C.Western Union
D.Paypal

As one of the most professional flange linear bearing manufacturers and suppliers in China, we're featured by quality products and good service. Please rest assured to wholesale customized flange linear bearing made in China here from our factory.

Flange Linear Bearing LMK20UU, LMF20UU Stainless Steel, LMH20LUU Stainless Steel
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