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.

Premium Needle Roller Bearings: Cut Friction by 40% & Boost Efficiency with OEM Customization

Struggling with high costs and unreliable needle roller bearings in your USA operations? YIDI Motion delivers factory-direct quality for purchasing managers seeking ROI-driven solutions.

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Why Needle Roller Bearings Are Failing Your Operations

As a purchasing manager in the USA manufacturing sector, you're facing skyrocketing costs and downtime. Here's the reality in 2026:

High Prices Eating ROI: Competitors charge 30-50% premiums due to middlemen, forcing you to overspend on basic needle roller bearings.
Low Quality Leading to Failures: Inferior imports fail prematurely, causing 25% unplanned downtime per industry reports from McKinsey.
Skyrocketing Shipping Costs: Cross-Pacific logistics add $5-10K per container, eroding margins amid volatile fuel prices.
Unreliable Supply Chains: Delays from China's fragmented suppliers disrupt your production lines.
Lack of Customization: Off-the-shelf bearings don't match your high-precision needs in automotive or robotics.
Compliance Headaches: Non-USA certified products risk FDA/CE violations and recalls.

These issues compound, slashing efficiency by up to 37%. Ready for a fix? Discover our solution below.

YIDI Motion's Needle Roller Bearings: Engineered for USA Demands

HEBEI YIDI IMPORT AND EXPORT TRADING CO., LTD. (YIDI Motion), established in 2020, powers your operations with factory-direct needle roller bearings. Our 100-employee team, with 30% senior technicians, uses German/Japanese equipment for precision unmatched by competitors.

YIDI Motion Factory Producing Needle Roller Bearings

Our state-of-the-art factory in Shijiazhuang, China—exporting to 50+ countries including the USA.

Core Advantages (USP-Driven)

Powerful Factory Capacity: Produce 500,000 units/month, ensuring high-speed delivery in 7-14 days to USA ports.
Quality Assurance: 100% tested for load/speed, with 0.01% defect rate vs. industry 2%.
OEM/ODM Design: Customize to your specs—tolerances down to ±0.001mm.
Cost Savings: 30-50% lower than USA distributors, direct from source.
Global Compliance: USA-ready certifications for seamless import.
One-Stop Linear Motion: Pair with ball screws, linear guides for full assemblies.

Technical Specifications: Precision at Its Core

Needle roller bearings feature thin, needle-like cylindrical rollers (diameter < 5mm, length 3-10x diameter) for compact, high-radial-load designs. Ideal for oscillatory motion, they minimize friction while maximizing stiffness. Our drawn cup needle roller bearings, machined needle roller bearings, and aligning needle roller bearings dominate applications.

Type	Bore Diameter (mm)	Outer Diameter (mm)	Width (mm)	Dynamic Load (kN)	Static Load (kN)	Max Speed (RPM)
Drawn Cup (HK Series)	3-50	8-65	8-20	5-15	4-12	20,000
Machined (RNA Series)	20-200	28-220	13-46	20-150	40-300	15,000
Aligning (PNA Series)	25-80	42-110	20-40	35-80	70-160	12,000
High-Precision (Custom OEM)	Custom	Custom	Custom	Up to 200	Up to 400	25,000+

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Performance highlights: Friction coefficient 0.001-0.003 (vs. ball bearings 0.005), radial load up to 5x bore size, axial misalignment tolerance ±0.5°. Materials: Chrome steel (GCr15) or stainless (9Cr18Mo), heat-treated to 58-62 HRC. Lubrication: Grease (NLGI 2) or oil mist for high-speed apps.

Real-World Applications & Case Studies

In automotive transmissions, our needle roller bearings handle 150kN loads at 10,000 RPM, reducing wear by 40%. A USA robotics firm reported 37% cost reduction after switching—full case on request.