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.

High-Precision Linear Guide Rails and Bearings for USA Manufacturers – Cut Costs by 30% in 90 Days with OEM Quality

Struggling with unreliable linear motion components? YIDI Motion delivers factory-direct linear guide rails and bearings engineered for high-load automation, ensuring zero downtime and fast USA delivery.

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The Challenges with Current Rail and Bearing Suppliers
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The Hidden Costs of Inferior Linear Guide Rails and Bearings in Your Operations

As a purchasing manager in the USA manufacturing sector, you know high price, low quality, and soaring shipping costs from traditional suppliers are killing your ROI. Here's why:

1. Frequent Failures Under Load: Cheap rails warp after 6 months, causing 37% unplanned downtime in CNC machines – per IndustryWeek reports.
2. Precision Loss in High-Speed Apps: Subpar bearings lead to 0.05mm accuracy drift, ruining tolerances in automation lines.
3. Skyrocketing Import Fees: Overseas middlemen add 25-40% markup plus duties, inflating your linear motion budget.
4. Long Lead Times: 8-12 week waits disrupt production schedules, costing $50K+ per delay in lost output.
5. Quality Inconsistencies: Variable preload and no certifications mean failed inspections and rework.
6. No Customization: Off-the-shelf parts don't fit your OEM needs, forcing expensive modifications.

These pain points hit 68% of USA operations managers (2025 Automation Survey). Ready to fix them? Discover YIDI's solution below.

YIDI Motion: Factory-Direct Linear Guide Rails and Bearings with OEM/ODM Excellence

Established in 2020, HEBEI YIDI IMPORT AND EXPORT TRADING CO.,LTD. (YIDI Motion) is your one-stop source for precision linear motion. With a 100-employee team (30% senior technicians) and equipment from Germany/Japan, we export to 50+ countries including the USA. Our USP: Powerful factory, quality assurance, OEM/ODM design, high-speed delivery.

Core Advantages (Backed by Specs)

1. Unmatched Durability: Ball-recirculating design handles 500km travel life at 5g acceleration.
2. Superior Precision: C0-C3 accuracy grades, <0.003mm/300mm straightness.
3. Heavy Load Capacity: Up to 120kN dynamic for rails, ideal for robotics.
4. Fast USA Delivery: 7-14 days via optimized supply chain – beat competitors' 30+ days.
5. Full OEM/ODM: Custom lengths, preloads (light/medium/heavy), integrated sensors.
6. Cost Savings: Direct factory pricing saves 30% vs. distributors.

Technical Specifications Table – Optimized for Search

Model Series	Rail Width (mm)	Dynamic Load (kN)	Accuracy Grade	Max Speed (m/s)	Material
EGH15/20	15-20	12.5-19.2	C0-C7	3	SCF Hardened Steel
EGH25/30	25-30	24.5-41.3	C0-C3	5	Alloy Steel + PTFE Seals
EGH35/45	35-45	41.3-120	C0-C1	5	High-Carbon Chrome Bearing Steel
LM Shaft/Bearing	10-50	1.85-68.6	H6-g6 Fit	3	SUJ2 + Lubricated Cage

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Table notes: Preloads available (Z0 light, ZA medium, ZB heavy). Friction coefficient <0.003 under load. Compatible with ball screws and linear modules.

Real-World Applications & Case Studies

Technical Deep Dive (1/3 Content Focus): Linear guide rails (aka linear motion rails) consist of a profiled rail and carriage with recirculating ball/roller bearings. Our high-precision linear bearings use 4-row circular-arc contact for 30% higher rigidity vs. competitors. In CNC routers, they maintain 99.9% positional accuracy at 60m/min feeds.

Performance Characteristics:

Rigidity: Moment load resistance up to Mx=500Nm, My/Mz=300Nm (EGH45).
Dust Protection: Double lip seals + metal scraper; IP65 rated for harsh environments.
Lubrication: Auto-grease nipples; oil-free options for cleanrooms (FDA-compliant).
Thermal Stability: <0.01mm expansion/100°C; ideal for semiconductor equipment.

Case Study: USA automation firm replaced competitor rails with YIDI EGH30 series – 45% load increase, 28% cost drop, 10-month payback. Applications span robotics, 3D printers, medical devices, packaging machines.