Manufacturing precision equipment demands reliable linear motion components. These recurring issues can halt production and increase your operational costs.
Short Service Life
Bearings wear out quickly, causing frequent replacements that interrupt production schedules and drive up maintenance costs significantly.
Unstable Precision
Inconsistent accuracy requires constant recalibration of your equipment, wasting valuable engineering time and compromising product quality.
Inconsistent Quality
Batch-to-batch variations mean unpredictable performance, forcing you to over-inspect parts and creating supply chain uncertainty.
Poor Compatibility
Non-standard dimensions prevent direct replacement, requiring costly system redesigns when switching suppliers or upgrading machinery.
Unreliable Lead Times
Unpredictable delivery schedules delay your entire production timeline, causing missed deadlines and frustrated customers.
Difficult Technical Support
Lack of engineering expertise from suppliers leaves you struggling with bearing selection, installation guidance, and troubleshooting issues.
Tired of dealing with these linear bearing problems?
Our precision-engineered linear bearings solve your motion control challenges with proven reliability and superior performance backed by expert technical support.
Precision Ball Cage Technology
Advanced ball retainer design maintains consistent spacing and smooth motion, eliminating accuracy drift and delivering repeatable positioning within ±0.005mm tolerance.
Expert Engineering Support
Dedicated technical team provides bearing selection assistance, load calculations, and application-specific recommendations to ensure optimal performance in your system.
Rigorous Quality Control
100% inspection protocol with automated testing equipment guarantees every bearing meets strict dimensional and performance standards before shipment.
International Standard Compatibility
Full compliance with ISO and DIN standards ensures direct interchange with major brands, simplifying replacement and reducing inventory complexity.
7-Day Fast Delivery
Streamlined production and ready stock of popular models mean your bearings ship within one week, keeping your project schedules on track.
Extended Service Life
Premium steel alloy construction and optimized heat treatment deliver 50% longer operational life compared to standard bearings, reducing total cost of ownership.
Understanding different linear bearing configurations helps you select the optimal solution for your application requirements, load conditions, and mounting constraints.
LM Series (Standard Type)
Most versatile cylindrical design for general automation, offering excellent load capacity and smooth operation in CNC machines, pick-and-place systems, and assembly lines.
LME Series (Extended Type)
Longer body length provides enhanced moment load capability and stability, ideal for applications requiring superior rigidity like robotic arms and medical imaging equipment.
LMF/LMK Flange Type
Integrated mounting flanges simplify installation and save assembly time, perfect for compact designs in packaging machinery and semiconductor handling equipment.
Open Type Bearings
One-side open construction allows easy shaft installation without dismounting, reducing maintenance time in high-frequency service applications like printing presses.
Adjustable Type
Pre-load adjustment capability enables precise control of clearance and rigidity, essential for ultra-precise positioning in measurement instruments and laser cutting systems.
Linear Bearing Units
Complete bearing housing assemblies with integrated support blocks provide ready-to-install solutions, accelerating machine building for material handling and automation systems.
Our best-selling bearings deliver proven performance across diverse industries. Each model undergoes rigorous testing to ensure exceptional reliability.
LM10UU
• Inner Diameter: 10mm
• Compact design for tight spaces
• Dynamic Load: 166N
• Perfect for 3D printers & DIY automation
Detailed dimensional and performance data to help you select the perfect linear bearing for your precision motion requirements.
Model
Inner Dia. (mm)
Outer Dia. (mm)
Length (mm)
Dynamic Load (N)
Weight (g)
Recommended Shaft
LM8UU
8
15
24
122
8
Ø8 h6
LM10UU
10
19
29
166
14
Ø10 h6
LM12UU
12
21
30
245
18
Ø12 h6
LM16UU
16
28
37
402
38
Ø16 h6
LM20UU
20
32
42
637
58
Ø20 h6
LM25UU
25
40
59
873
120
Ø25 h6
LME25UU
25
40
112
1,080
196
Ø25 h6
LM30UU
30
45
64
1,177
156
Ø30 h6
LMK12UU
12
21
30
245
22
Ø12 h6
LMF30UU
30
45
64
1,470
178
Ø30 h6
Important Selection Guidelines
Dynamic load ratings represent continuous operation at 100m/min speed. For critical applications requiring maximum service life, we recommend operating at 30-50% of rated load capacity. All bearings are manufactured to ISO 2768-m tolerance standards and delivered with protective oil coating. Shaft hardness should be HRC 58-62 with surface roughness Ra 0.4μm or better for optimal performance and longevity.
Need help selecting the right bearing specification?
Tailor linear bearings to your exact specifications with our comprehensive customization services, ensuring perfect integration with your unique application requirements.
Material Customization
Choose from premium bearing steel, stainless steel 440C for corrosive environments, or lightweight aluminum housings to optimize performance while meeting weight and durability requirements.
Preload Adjustment
Precision pre-load tuning from C0 (zero clearance) to C5 (maximum clearance) allows you to balance between rigidity for positioning accuracy and smooth motion for high-speed applications.
Lubrication Options
Standard lithium grease, high-temperature synthetic lubricants up to 150°C, food-grade NSF H1 approved grease, or dry-film coatings for vacuum environments—optimized for your operating conditions.
Corrosion Protection
Electroless nickel plating, zinc-nickel coating, or ceramic ball bearings provide superior resistance to moisture, chemicals, and extreme temperatures in harsh industrial environments.
Special Machining
Custom mounting hole patterns, modified dimensions for retrofitting legacy equipment, integrated sensors, or specialized sealing configurations to match your exact mechanical interface requirements.
Bulk Packaging
Custom packaging solutions including vacuum-sealed bags, nitrogen-filled containers for long-term storage, or private labeling with your branding for OEM partnerships and high-volume orders.
Our linear bearings deliver precision motion control across diverse industries, from high-speed automation to medical diagnostics, proving their versatility and reliability.
Industrial Automation
Pick-and-place systems, assembly lines, and material handling equipment rely on our bearings for consistent positioning accuracy and minimal maintenance downtime.
Industrial Robotics
Robotic arms, gantry systems, and collaborative robots achieve smooth, precise movements essential for welding, painting, and precision assembly operations.
Medical Equipment
CT scanners, surgical robots, and diagnostic instruments depend on ultra-smooth motion and zero backlash for patient safety and diagnostic precision.
Packaging Machinery
High-speed filling, labeling, and cartoning machines utilize our bearings to maintain timing accuracy across millions of cycles in food and pharmaceutical packaging.
3D Printing Systems
FDM and SLA printers achieve layer precision and print quality through our low-friction bearings that ensure consistent motion throughout extended print jobs.
CNC Machining
Milling machines, lathes, and plasma cutters deliver repeatable accuracy and surface finish quality enabled by our rigid, high-load capacity linear motion systems.
Explore how our bearings can enhance your application
Understanding the engineering principles behind linear bearings helps you maximize performance, prevent premature wear, and optimize your motion system design.
Linear Motion Through Ball Circulation
Linear bearings convert rotary motion into precise linear travel using recirculating ball technology. Steel balls roll between the bearing's inner race and the hardened shaft, creating a low-friction interface that supports both radial and moment loads. The ball retainer cage maintains optimal spacing, preventing contact between adjacent balls and ensuring smooth, quiet operation even at high speeds.
Key Advantages Over Sliding Friction
Unlike plain bushings that rely on sliding friction, linear ball bearings achieve rolling contact that dramatically reduces friction coefficients from 0.1-0.3 down to 0.002-0.004. This translates to 75% less drive force required, reduced heat generation, extended service life, and elimination of stick-slip phenomenon that causes positioning errors in precision applications.
Minimal Friction
Rolling contact reduces friction by 98% compared to sliding bearings, enabling energy-efficient operation.
Extended Lifespan
Ball circulation prevents wear accumulation, delivering 5-10x longer service life than sliding systems.
Smooth Motion
Eliminates stick-slip behavior, ensuring consistent velocity and positioning accuracy across the entire stroke.
Linear Bearings vs. Linear Guide Rails
While both enable linear motion, linear bearings slide on cylindrical shafts while guide rails use profiled tracks with slider blocks. Linear bearings offer lower cost, easier installation, and sufficient performance for loads under 2kN. Guide rails provide higher load capacity, superior rigidity, and better moment resistance for heavy gantry systems. Choose bearings for compact designs and moderate loads; select rails for industrial machinery requiring maximum stiffness and precision.
Need help determining if linear bearings suit your application?
Follow these critical installation procedures to maximize bearing performance, prevent premature failure, and ensure your linear motion system operates at peak efficiency.
Pre-Installation Inspection
Verify shaft straightness within 0.05mm tolerance, check surface finish Ra ≤0.4μm, confirm hardness HRC 58-62, and inspect for scratches, burrs, or contamination that could damage bearing balls.
Thorough Cleaning
Remove all protective oil with clean solvent, wipe shaft and bearing housing with lint-free cloth, blow out debris with filtered compressed air, and ensure absolute cleanliness before assembly.
Apply Proper Lubrication
Apply thin, uniform layer of recommended grease to shaft surface, avoid over-lubrication which attracts contaminants, repack bearing if storage exceeded 6 months, and use appropriate lubricant for temperature range.
Careful Bearing Installation
Slide bearing onto shaft with gentle pressure only, never hammer or force installation as this damages ball races, ensure proper alignment before tightening mounting hardware, and avoid cross-threading fasteners.
Proper Torque Application
Use calibrated torque wrench set to manufacturer specifications, tighten mounting bolts in star pattern to prevent distortion, check for binding by manually sliding bearing along full stroke length.
Final Verification Testing
Run bearing through complete travel range checking for smooth operation, listen for unusual noise indicating contamination or damage, measure play and preload, verify temperature remains stable during operation.
Critical Installation Warnings
Never impact bearings directly with hammers or excessive force – this permanently damages internal ball races and retainer cages, causing premature failure. Avoid mixing bearings from different manufacturers on the same shaft as dimensional variations create uneven load distribution. Do not operate bearings in dusty environments without proper sealing – contamination is the primary cause of bearing failure. Never exceed maximum shaft tolerance of h7 – interference fits cause internal stress and binding. Following these guidelines prevents 95% of premature bearing failures.
Need detailed installation instructions for your specific model?
Our multi-stage inspection protocol ensures every linear bearing meets stringent international standards, delivering consistent performance and reliability you can trust.
Material Inspection
Spectrometer analysis verifies steel alloy composition meets GCr15 bearing steel standards for optimal hardness and wear resistance.
Raceway Precision
CMM coordinate measuring machines verify raceway geometry to ±0.003mm tolerance ensuring perfect ball contact and smooth operation.
Noise Testing
Acoustic sensors detect abnormal bearing noise at 100rpm, identifying contamination or manufacturing defects before shipment.
Preload Verification
Force gauges measure internal clearance and preload levels, confirming optimal ball-to-raceway contact for your specified application.
Endurance Testing
Sample bearings undergo 1 million cycle fatigue tests under rated load conditions validating design life calculations.
Concentricity Check
Runout indicators measure radial and axial concentricity preventing vibration and ensuring bearing tracks true on the shaft.
Visual Inspection
Trained inspectors examine surface finish, seal integrity, and packaging quality under magnification to catch any defects.
Packaging Protection
Anti-rust paper wrapping and individual boxes prevent moisture damage and handling scratches during shipping and storage.
100%
Full Inspection
±0.003mm
Precision Tolerance
ISO 9001
Certified System
<0.2%
Defect Rate
Want to see our quality control process in action?
From raw material to finished product, our systematic six-stage production workflow ensures consistent quality and precision in every linear bearing we manufacture.
1
Raw Material Preparation
Premium GCr15 bearing steel bars are precision-cut to exact lengths using CNC saws, with chemical composition verified by spectrometer to ensure proper carbon and chromium content for maximum hardness.
2
CNC Machining
Swiss-type CNC lathes turn inner and outer diameters to within 0.01mm tolerance, while ball circulation grooves are precisely milled using carbide tooling for perfect ball pathway geometry.
3
Heat Treatment
Controlled atmosphere vacuum furnaces heat components to 840°C then quench in specialized oil, achieving HRC 58-62 surface hardness while maintaining core toughness to prevent cracking under shock loads.
4
Precision Grinding
Centerless grinders achieve Ra 0.2μm surface finish on raceways using CBN wheels, removing heat treatment distortion while maintaining tight dimensional tolerances essential for smooth ball rolling.
5
Clean Room Assembly
In controlled environment workstations, technicians install precision-sorted steel balls and retainer cages, then pack with lithium grease and install end seals to prevent contamination during service.
6
Quality Verification
Every bearing undergoes noise testing, dimensional verification, and rotation smoothness checks before protective packaging and serialization for full traceability throughout the product lifecycle.
Interested in learning more about our manufacturing capabilities?
Our state-of-the-art facility combines advanced automation with skilled craftsmanship, delivering precision linear bearings to customers worldwide.
15,000㎡ Production Facility
Our climate-controlled manufacturing complex houses 80+ CNC machines, heat treatment furnaces, and precision grinding equipment operating 24/7 to meet global demand. Dedicated production lines for standard and custom bearings ensure rapid turnaround without compromising quality.
With ISO 9001:2015 certification and adherence to international bearing standards, we maintain consistent excellence across all product lines serving automation, robotics, and precision machinery markets.
Expert Engineering Team
Our 25-person technical team combines bearing design specialists, materials engineers, and quality control experts with an average of 12 years industry experience. They provide application analysis, custom bearing development, and ongoing technical support to optimize your motion systems.
Continuous R&D investment keeps us at the forefront of linear motion technology, developing enhanced seal designs, specialized lubricants, and manufacturing process improvements that benefit all our customers.
15,000㎡
Production Area
80+
CNC Machines
150+
Skilled Workers
50+
Countries Served
Discover why leading manufacturers trust our facility
Don't just take our word for it. Hear from engineers and procurement professionals who rely on our linear bearings for their critical motion control applications.
We've been using these linear bearings in our CNC router systems for two years now. The consistency between batches is outstanding—no more calibration headaches. Running 24/7 production, we've seen virtually zero failures. The engineering support during selection was invaluable.
MK
Michael Kumar
Production Manager, TechMach Industries
Precision is everything in medical imaging equipment. These bearings deliver the smooth, vibration-free motion we need for CT scanner gantries. After rigorous testing, they outperformed premium European brands in noise and runout specs. The custom lubrication option was perfect for our cleanroom requirements.
SJ
Dr. Sarah Jensen
Lead Engineer, MedTech Solutions
As a robotics integrator, reliable components are non-negotiable. These bearings have become our standard specification across all projects. The 7-day delivery promise is actually real—critical when client timelines are tight. Quality documentation and traceability make our ISO audits smooth. Excellent value for performance delivered.
Experience superior motion control with bearings engineered for reliability, backed by expert technical support, and delivered when you need them. Let's solve your linear motion challenges together.
