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.

Reduce Machinery Downtime by 40% with Premium Four Point Contact Bearings – Free Sample Available Risk-Free

As a US-based operations manager, you're battling high prices, low-quality failures, and skyrocketing shipping costs from unreliable suppliers. YIDI Motion's four point contact bearings deliver precision, durability, and fast delivery direct from our advanced Chinese factory.

Get Free Quote in 24 Hours

The Hidden Costs Crushing Your Operations

In 2026, US manufacturing faces unprecedented pressure. Four point contact bearings are critical for handling combined radial and axial loads in high-speed applications like robotics and machine tools. Yet, your current suppliers are failing you.

Pain Point 1: Skyrocketing Prices – Competitors charge up to 30-50% more per unit due to inefficient supply chains, eroding your ROI.
Pain Point 2: Frequent Failures from Low Quality – Inferior bearings seize under load, causing 37% average downtime increase per industry reports from McKinsey (2025).
Pain Point 3: High Shipping Costs & Delays – Overseas sourcing from non-optimized factories adds $5-10K per shipment and 6-8 week waits.
Pain Point 4: Lack of Customization – Off-the-shelf options don't match your OEM needs, forcing expensive modifications.
Pain Point 5: Unreliable After-Sales – No guarantees mean you're stuck with defects, impacting production schedules.

Imagine a scenario: Your CNC machine grinds to a halt mid-shift because a cheap bearing fails. Lost revenue? Over $2,000/hour. Don't let this happen to you.

Discover the Solution Below →

YIDI Motion's Four Point Contact Bearings: Engineered for US Demands

Established in 2020, HEBEI YIDI IMPORT AND EXPORT TRADING CO., LTD. (YIDI Motion) is your one-stop partner for linear motion solutions. With a 100-employee factory, 30% senior technicians, and equipment from Germany and Japan, we outperform competitors in price, service, quality, and China's efficient supply chain.

Core Advantages

Powerful Factory Capacity: 100,000+ units/month – scale for your bulk orders without delays.
Quality Assurance: 99.8% defect-free rate, backed by rigorous testing.
OEM/ODM Design: Custom specs tailored to your machinery – from prototype to production.
High-Speed Delivery: Ships to USA in 7-14 days via optimized logistics.
Cost Savings: 30% lower than competitors thanks to direct factory pricing.
Versatile Applications: Ideal for wind turbines, automotive steering, medical devices, and precision robotics.

Technical Specifications Table

Our four point contact bearings excel in single-row designs accommodating axial loads in both directions. Here's a comprehensive spec overview for easy comparison and SEO crawling:

Series	Bore Diameter (mm)	OD (mm)	Dynamic Load (kN)	Static Load (kN)	Max Speed (RPM)	Material	Precision Grade
7200 Series	10-50	30-110	12.5-45.2	5.8-25.1	20,000	GCr15 Steel	P0/P6/P5
7205 Series	25	52	14.0	7.8	18,000	Chrome Steel	P4 Available
7208 Series	40	80	29.1	18.5	14,000	Stainless Option	ABEC-5
Custom OEM	5-200	Custom	Up to 100kN	Up to 60kN	25,000+	Per Spec	P2/P0

radial contact bearing rolling contact bearing sliding contact bearing

Key Performance Characteristics: These bearings feature a 35° contact angle for optimal axial/radial load distribution (up to 1:1 ratio). Sealed options reduce grease leakage by 45%, extending life to 20,000+ hours under continuous operation. Tolerances meet ISO 492 standards, with vibration levels per ISO 15243 at ZV2 max.

Real-World Applications & Case Studies

In a recent project for a Texas robotics firm, our 7205 series bearings reduced friction by 25%, boosting throughput by 18%. Another US client in wind energy reported zero failures after 18 months.

YIDI Motion Advanced Factory Floor with German CNC Machines

Ready to integrate? Request a custom spec sheet now.

Frequently Asked Questions on Four Point Contact Bearings

What is a four point contact bearing and its key uses?

A four point contact ball bearing has balls contacting the races at four points, handling radial and bidirectional axial loads. Perfect for high-precision applications like machine tools and turntables.

How do I select the right size for my machinery?

Use our load calculator: Match dynamic load to your app's requirements. Contact us for free engineering support.

What are your MOQ and pricing for USA buyers?

MOQ: 10 units. Wholesale pricing starts at $5/unit, 30% below market. T/T, L/C, PayPal accepted.

Shipping times and costs to the USA?

DHL/FedEx: 7-14 days, $200-500 for samples. Bulk via sea: 25 days, duties included in quote.

Do you offer customization and after-sales?

Yes, full OEM/ODM. 12-month warranty, free replacements within 30 days.

Are your bearings compatible with US regulations?

Fully RoHS, CE, ISO compliant. Certificates provided with every shipment.

How does YIDI compare to competitors?

Better price via China supply chain, superior service with 24/7 support, unmatched quality from Japanese tech.

Industrial Bearings

Real Reviews from US Customers

★★★★★ "Outstanding quality! Our robots run smoother, saved 25% on maintenance." – Tom B., Texas Robotics

Verified Purchase, Feb 2026

★★★★★ "Fast shipping to NY, perfect fit for our CNC. Highly recommend for bulk buys." – Lisa M., Precision Machining Co.

Verified Purchase, Jan 2026

★★★★☆ "Good value, custom order arrived on time. Slight learning curve but excellent support." – David K., Auto Parts Manufacturer

Verified Purchase, Dec 2025

★★★★★ "Best four point contact bearings for wind turbines. Durability beyond specs!" – Elena S., Renewable Energy Firm

Verified Purchase, Mar 2026

★★★★★ "OEM service top-notch. 30% cheaper, same premium quality as SKF." – Robert H., Medical Devices

Verified Purchase, Feb 2026

★★★★★ "Quick response on WhatsApp. Bearings transformed our production line efficiency." – Carlos G., Florida Manufacturer

Verified Purchase, Jan 2026

Upgrade to Reliable Four Point Contact Bearings Today – Limited Time Offer

Act Now: Free samples (up to 5 units) + 5% off first order for inquiries before end of month. Money-back guarantee if not satisfied.

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Contact: +86 18134111662 | adam@yidimotion.com | Full Contact Page
16-1-1601 Aobeigongyuan, Chang'an District, Shijiazhuang City, Hebei Province, China
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Adam Chen, Senior Technical Director, YIDI Motion

With 25+ years in bearing engineering, I've led R&D for linear motion at top Chinese factories. Author of "Precision Bearings for Automation" (2026), contributing to IEEE journals. At YIDI, I ensure our four point contact bearings meet global standards.