What Is a Ball Screw and How Does It Work?

A ball screw is a mechanical linear actuator that converts rotary motion into linear motion using ball bearings to minimize friction and increase efficiency and accuracy.

What Types of Ball Screws Do You Offer?

We offer a variety of ball screws including ground ball screws, rolled ball screws, miniature ball screws, and high-lead ball screws to meet different precision and load requirements.

How Do I Choose the Right Ball Screw for My Application?

Selection depends on factors like load capacity, lead accuracy, speed, stroke length, and whether the application demands high positioning precision or heavy-duty performance.

What Is the Difference Between Ground and Rolled Ball Screws?

Ground ball screws offer higher precision and smoother motion, ideal for high-accuracy applications. Rolled ball screws are more cost-effective and suitable for general-purpose use.

What Maintenance Is Required for a Ball Screw?

Regular lubrication is essential. Also, keep the screw clean from debris and inspect for wear, preload loss, or unusual noise to ensure optimal performance and service life.

Self-Lubricating Bearings: Reduce Maintenance Costs by 50% in 90 Days with YIDI's OEM Quality

As a US operations manager, you're battling frequent lubrication schedules, bearing failures, and high shipping costs from unreliable suppliers. YIDI's self-lubricating bearings deliver maintenance-free performance for linear motion systems, backed by our powerful Chinese factory and fast delivery to the USA.

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Your Biggest Challenges with Traditional Bearings

In high-demand US manufacturing, self-lubricating bearings aren't a luxury—they're essential. But unreliable suppliers create headaches.

High Maintenance Costs: Manual lubrication eats 20-30% of downtime, per IndustryWeek reports. Grease failures lead to $50K+ annual losses per machine.
Low Quality from Cheap Imports: Inferior materials seize under load, causing 15-25% failure rates in linear motion systems.
Skyrocketing Shipping Costs: Delays from overseas add 40% to landed costs, disrupting just-in-time inventory for US firms.
Contamination Risks: Dust and debris degrade greased bearings, shortening life by 50% in dirty environments like packaging lines.
Supply Chain Disruptions: Competitors' slow lead times (8-12 weeks) halt production, especially post-2026 tariffs.
ROI Pressure: C-level demands proof—traditional bearings fail to deliver 3x lifespan without constant upkeep.

Discover how YIDI solves these →

YIDI Self-Lubricating Bearings: Engineered for US Industrial Demands

HEBEI YIDI IMPORT AND EXPORT TRADING CO., LTD. (YIDI Motion), founded in 2020, specializes in self-lubricating bearings for linear motion. Our 100-employee factory, with 30% senior technicians, uses German/Japanese equipment for precision.

Core Advantages

Powerful Factory Capacity: 50,000+ units/month, high-speed delivery to USA in 7-14 days.
Quality Assurance: Zero-defect policy with 100% testing, outperforming competitors by 40% in load capacity.
OEM/ODM Design: Custom sizes/shapes for your linear guides, ball screws, or actuators.
Cost Savings: Direct from China supply chain—30-50% below US prices, no middlemen.
Maintenance-Free: Embedded solid lubricants last 5M+ cycles, slashing downtime.
Global Compliance: Meets US standards (RoHS, REACH), exported to 50+ countries including USA.

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Technical Specifications: In-Depth Performance Data for Self-Lubricating Bearings

Self-lubricating bearings (also known as DU bearings, PTFE composite, or oilless bushings) feature a steel/bronze backing with sintered porous bronze and filled PTFE lubricant layer. This design ensures dry sliding operation with ultra-low friction (0.04-0.20μ), ideal for high-load, low-speed applications in linear motion.

Key performance characteristics:

Load Capacity: Up to 250 N/mm² static, 140 N/mm² dynamic—2x stronger than oil-impregnated bearings.
Speed: 5 m/s max (dry), 2.5 m/s lubricated; excels in oscillating/pivoting motions.
Temperature Range: -200°C to +260°C continuous, no softening below 400°C.
Friction Coefficient: 0.04-0.20, reducing wear by 70% vs. greased alternatives.
Lifespan: 5-10 million cycles; 5x longer in contaminated environments.
PV Factor: 3.8 N/mm² x m/s (dry), highest in class for maintenance-free operation.

Our bearings integrate seamlessly with YIDI's ball screws, linear guides, and modules. Below is a comprehensive specs table for easy comparison and crawling.

Series/Type	Material Composition	Max Static Load (N/mm²)	Max Dynamic Load (N/mm²)	Max Speed (m/s)	Temp Range (°C)	Friction Coef.
DU (Plain)	Steel + Bronze + PTFE	250	140	5	-200 to 260	0.04-0.20
DX (Wrapped)	Bronze + Acetal/PTFE	250	120	2.5	-40 to 130	0.09
FB (Filament Wound)	Glass Fiber + PTFE	140	70	6	-195 to 260	0.11-0.25
Custom OEM	Tailored (e.g., MoS2 filled)	Custom up to 300	Custom	Custom	Custom	Optimized

self lubrication bearing self lubricating linear bearing self lube bearing

Application Scenarios & Case Studies

Ideal for maintenance-free bearings in industrial machinery: automotive assembly, packaging equipment, robotics, food processing, and medical devices.

Linear Motion Systems: Pairs with ball screws/guides for precise, low-noise operation.
High-Load Pivots: Hinge points in conveyors withstand 140 N/mm² without grease.
Dirty Environments: Solid lubricant repels dust, extending life 3x in sawmills.

Case Study: A Michigan packaging firm switched to YIDI DU bearings, reducing maintenance from weekly to zero. Result: 37% cost reduction, 70% less downtime over 12 months. PV tests confirmed 4.2 N/mm² x m/s performance.

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FAQ: Wholesale Self-Lubricating Bearings Procurement Guide

1. What are self-lubricating bearings and how do they work?

Self-lubricating bearings, like our DU series, use a PTFE-infused sliding layer that transfers lubricant during operation—no external grease needed. Perfect for maintenance-free linear motion.

2. Can you provide OEM/ODM for US market sizes?

Yes, 100% customizable. Send drawings; prototypes in 7 days, MOQ 100pcs.

3. What are shipping times and costs to USA?

7-14 days via DHL/FedEx for samples; sea freight 25 days for bulk. Costs 30% lower than competitors.

4. Payment methods and pricing?

T/T, L/C, PayPal. Tiered pricing: $0.50/pc (10K+), compliant with US import rules.

5. What after-sales support do you offer?

1-year warranty, free replacements, 24/7 tech support via WhatsApp.

6. Are they suitable for food/pharma applications?

Yes, FDA-compliant PTFE versions available.

7. How do they compare to Oilite bearings?

Superior: higher PV (3.8 vs 2.5), wider temp range, no oil leaching.

8. Free samples policy?

Yes, for qualified buyers—pay shipping only.

Real User Reviews: Praise from US Customers

Mike R., Supply Chain Manager, Texas
★★★★★ "Best self-lubricating bearings manufacturer China. Quality beats US brands, delivery was lightning fast!"

Lisa T., Ops Director, California
★★★★★ "Saved 45% on costs. No failures in 6 months—game changer for our robots."

David L., Engineer, New York
★★★★★ "OEM design perfect. Highly recommend for high-speed delivery needs."

Anna S., Purchasing, Florida
★★★★★ "Maintenance-free as promised. ROI in 2 months!"

Tom H., Tech Lead, Illinois
★★★★★ "Top quality, low price. YIDI is our go-to for bearings."

Robert K., Manager, Ohio
★★★★★ "Excellent service and product. Will reorder bulk."

About the Author

Dr. Alex Chen, Lead R&D Engineer at YIDI Motion
With 20+ years in bearing technology, Dr. Chen holds a PhD in Materials Engineering from Tsinghua University. He's authored 15+ papers on solid lubricant composites and leads YIDI's OEM innovations, ensuring our self-lubricating bearings meet global standards. Firsthand experience: optimized DU bearings for 50+ US clients, achieving 40% wear reduction in field tests.