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 Strain Wave Gear: Cut Motion Control Costs by 30% in 90 Days – Free Samples for USA Buyers

Solve high prices, low quality, and shipping delays with YIDI Motion's OEM strain wave gears – engineered for robotics, automation, and precision machinery.

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01. Common Challenges with Strain Wave Gears
02. YIDI Motion's Strain Wave Gear Solutions
03. Proven Results & Certifications
04. Frequently Asked Questions
05. Customer Reviews
06. Ready to Upgrade? Contact Us Now

Your Strain Wave Gear Pain Points: Why Standard Options Fail

As a purchasing manager in the USA, you're dealing with skyrocketing prices from traditional suppliers, inconsistent quality that leads to downtime, and shipping costs eating 20-30% of your budget. Here's the reality:

High Prices: Imported strain wave gears from Europe or Japan cost $500-$2000 per unit, squeezing your ROI in automation projects.
Low Quality & Backlash Issues: Cheap Chinese alternatives suffer 0.1-0.5° backlash, causing precision errors in robotics arms – up to 15% failure rate in high-cycle operations.
Prohibitive Shipping Costs: Delays of 8-12 weeks and fees over $200/unit from overseas disrupt your supply chain.
Limited Customization: Off-the-shelf harmonic drives don't fit OEM needs for medical devices or aerospace.
Supply Chain Volatility: Competitors' lead times stretch to 16 weeks amid global disruptions.
After-Sales Gaps: No local support means weeks of downtime for repairs.

These issues result in 37% higher total ownership costs (per IndustryWeek 2025 report). Ready for a fix? Discover our solution below.

YIDI Motion Strain Wave Gears: Precision Engineered for Your Needs

At HEBEI YIDI IMPORT AND EXPORT TRADING CO., LTD. (YIDI Motion), established in 2020, we manufacture strain wave gears (also known as harmonic drives) with German and Japanese precision equipment. Our 100-employee factory, with 30% senior technicians, delivers OEM/ODM designs at 30% lower costs than competitors.

Core Advantages:

Zero Backlash Precision: <0.01° repeatability for robotics and CNC.
High Reduction Ratios: 50:1 to 160:1 in compact sizes, reducing assembly space by 40%.
Powerful Factory Capacity: 10,000 units/month, high-speed delivery in 2-4 weeks to USA.
Quality Assurance: 1.5 million cycle life, vibration <0.1g.
OEM/ODM Flexibility: Custom flex splines for your actuators.
Cost Savings: Direct from factory – beat China's supply chain with verified quality.

Technical Specifications Table

Our strain wave gears excel in technical parameters, forming the backbone of this guide. Here's a comprehensive specs table for easy comparison and SEO crawling:

Model	Reduction Ratio	Max Torque (Nm)	Backlash (arc-min)	Rated Speed (rpm)	Weight (kg)	Price Range (USD)
YDG-14	50:1 / 80:1 / 100:1	15	<1	3000	0.8	$250-350
YDG-17	50:1 / 80:1 / 100:1 / 160:1	29	<1	3000	1.5	$350-450
YDG-20	50:1 / 80:1 / 100:1	42	<1	2500	2.2	$450-550
YDG-25	50:1 / 80:1 / 100:1 / 160:1	77	<1	2500	4.0	$550-700
YDG-32	50:1 / 80:1 / 100:1	145	<1	2000	8.5	$800-1000

strain wave gearing strain wave gearbox strainwave gearbox

Key Performance Characteristics: Strain wave gears feature a wave generator (elliptical cam), flex spline (deformable cup), and circular spline (fixed ring). This design achieves high reduction without traditional gears, ideal for zero-backlash applications. Efficiency: 70-80% at rated load; torsional stiffness: 2000-5000 Nm/rad. Tested per ISO 6336 for gear strength.

Application Scenarios & Case Studies

Industrial Robotics: YDG-20 in Fanuc arms – 25% faster cycle times, used by USA automotive firms.
Medical Devices: YDG-14 for surgical robots – precision <0.005mm, compliant with FDA standards.
Aerospace: Custom YDG-25 for UAV gimbals – vibration resistance up to 10g.
CNC Machines: Integrated with ball screws for 5-axis milling – 40% cost reduction vs. competitors.

YIDI Motion Factory – Advanced Strain Wave Gear Production Line

Our 10,000 sqm factory ensures high-speed delivery.

Explore OEM options? See FAQs or contact us.

FAQ: Strain Wave Gear Procurement Essentials

What is a strain wave gear and its key components?

A strain wave gear (harmonic drive) uses a wave generator, flex spline, and circular spline for high-ratio reduction with zero backlash. Perfect for precision motion.