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.

China linear bearings and shaft Manufacturer

Common Challenges in Sourcing Linear Motion Components

Engineers and procurement managers face critical pain points when selecting linear bearings and shafts for industrial applications:

1. Premature Wear and Reduced Lifespan

Low-quality materials and poor heat treatment lead to 50% shorter service life in high-load applications. Our hardened steel shafts (HRC 58-62) and self-lubricating bearings solve this with 5x longer durability.

2. Incompatible Dimensions and Mounting Issues

68% of procurement delays stem from dimension mismatches. YIDI offers custom sizing (Ø6mm–Ø80mm shafts) and CAD model support to ensure seamless integration.

3. High Maintenance Costs

Traditional bearings require frequent lubrication, adding $12,000/year in maintenance for a 100-unit production line. Our sealed, self-lubricating designs cut this cost by 70%.

4. Supply Chain Uncertainty

Lead times from overseas suppliers often exceed 90 days. YIDI’s China-based factory + global logistics guarantees 30-day delivery to the US/EU with 99.5% on-time shipping.

Solution: YIDI’s linear bearings and shafts address these pain points with German/Japanese-grade precision, customization, and reliable supply chains.

Discuss Your Custom Requirements

YIDI's High-Performance Linear Bearings and Shafts

As a direct manufacturer with 100+ employees (30% senior technicians), YIDI delivers linear motion solutions that outperform competitors in precision, durability, and cost-efficiency.

Why Choose YIDI?

✅ Advanced Manufacturing

Equipped with German and Japanese machinery, our production lines achieve ±0.005mm tolerance for shafts and bearings—critical for CNC and robotics applications.

✅ Material Superiority

Shafts: Chrome-plated SUJ2 steel (HRC 58-62) or stainless steel (SUS440C) for corrosion resistance.
Bearings: POM (polyoxymethylene) or self-lubricating PTFE for maintenance-free operation.
Load Capacity: Up to 5,000 N dynamic load (vs. 3,000 N industry average).

✅ Customization Capabilities

Need non-standard sizes? We offer:

Shaft diameters: Ø6mm–Ø80mm (standard: Ø8, Ø12, Ø16, Ø20, Ø25, Ø30).
Lengths: Custom-cut up to 6,000mm (standard: 1,000mm–3,000mm).
Special coatings: Zinc, nickel, or black oxide for harsh environments.
Bearing blocks: Open, closed, or flanged types.

YIDI Motion linear bearings and shaft quality inspection with precision tools

YIDI Motion warehouse with linear bearings and shaft inventory ready for global shipping

How We Compare to Competitors

YIDI vs. THK, DryLin, and generic suppliers:

Feature	YIDI Motion	THK (Japan)	DryLin (Germany)	Generic Suppliers
Price (USD/Unit)	$12–$50	$80–$200	$60–$150	$8–$25 (low quality)
Lead Time	30 days	60–90 days	45–60 days	60+ days (unreliable)
Precision Grade	±0.005mm	±0.003mm	±0.01mm	±0.05mm
Customization	Full OEM/ODM	Limited	Partial	None
Load Capacity	5,000 N	6,000 N	4,000 N	2,000–3,000 N
Warranty	2 years	1 year	1 year	3–6 months

Key Advantage: YIDI offers THK-like quality at 60% lower cost with faster delivery and full customization.

Request a Competitor Comparison

Technical Specifications

Linear Shafts

linear shaft and bearing linear shaft bearing linear bearing shaft

Parameter	Standard Series	Heavy-Duty Series	Stainless Steel Series
Material	SUJ2 (Chrome-Plated)	SUJ2 (Hardened)	SUS440C
Hardness (HRC)	58–62	58–62	56–60
Diameter Tolerance	±0.005mm	±0.003mm	±0.005mm
Straightness	0.15mm/1000mm	0.10mm/1000mm	0.20mm/1000mm
Surface Roughness	Ra 0.4μm	Ra 0.2μm	Ra 0.6μm

Linear Bearings

Parameter	Standard Ball Bearing	Self-Lubricating	Heavy-Load
Material	Chrome Steel	POM + PTFE	Alloy Steel
Dynamic Load (N)	1,800–3,000	1,200–2,500	3,000–5,000
Static Load (N)	2,500–4,000	2,000–3,500	4,000–7,000
Max Speed (m/min)	50	30	40
Lubrication	Grease	Maintenance-Free	Grease

Note: Custom specifications available upon request. Contact adam@yidimotion.com for a quote.

Industry Applications

YIDI’s linear bearings and shafts are trusted in high-precision applications across industries:

CNC Machinery: Spindle movement, tool changers (±0.005mm repeatability).
Packaging Equipment: Conveyor systems, pick-and-place robots (100,000-cycle longevity).
Medical Devices: MRI machines, surgical robots (stainless steel, corrosion-resistant).
Automation: 3D printers, robotic arms (low friction, high speed).
Textile Machinery: Loom shuttle systems (self-lubricating, dust-resistant).
Semiconductor: Wafer handling (cleanroom-compatible, low outgassing).

Case Study: CNC Router Manufacturer (USA)

Challenge: Frequent bearing failures in high-speed routers caused 12% downtime.

Solution: YIDI’s heavy-duty linear shafts (Ø30mm) + sealed ball bearings.

Result: 40% reduction in downtime, 3x longer lifespan, and $24,000/year savings in maintenance.

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Why Global Manufacturers Trust YIDI

Certifications & Compliance

ISO 9001 certification for YIDI Motion linear bearings and shaft quality management

CE certification for YIDI Motion linear bearings and shaft EU compliance

RoHS compliance for YIDI Motion linear bearings and shaft environmental standards

FDA certification for YIDI Motion linear bearings and shaft medical applications

Global Client Base

Our linear bearings and shafts are exported to 50+ countries, including:

Customer Testimonials

“YIDI’s linear shafts reduced our CNC machine calibration time by 35%. Their ±0.005mm precision is unmatched at this price point.”

— Michael Carter, Operations Director, Precision Machining Inc. (USA)

“We switched from THK to YIDI for our semiconductor equipment and saw no difference in performance—but saved 40% on costs. Delivery was on time, every time.”

— Takashi Tanaka, Procurement Manager, NanoTech Solutions (Japan)

“The self-lubricating bearings eliminated our maintenance headaches. After 2 years and 10M cycles, they’re still running smoothly.”

— Sophie Dubois, Engineering Lead, PackExpo Systems (France)

Join 500+ Satisfied Clients Worldwide

Frequently Asked Questions

❓ What’s the difference between linear bearings and ball bushings?

Linear bearings (like our LM6UU or SCS8UU models) use recirculating balls for high precision and load capacity. Ball bushings (e.g., KH series) are simpler, cheaper, but less precise. For CNC or heavy-duty applications, linear bearings are the better choice.

❓ Can I get custom lengths for linear shafts?

Yes! We offer custom lengths from 100mm to 6,000mm in increments of 1mm. For bulk orders (100+ units), we provide free cutting and end machining (e.g., threading, chamfering).

Machine Bearing

❓ How do I choose between stainless steel and chrome-plated shafts?

Chrome-Plated (SUJ2): Best for high precision (CNC, robotics). Hardness: HRC 58–62.
Stainless Steel (SUS440C): Ideal for corrosive environments (medical, food processing). Slightly lower hardness (HRC 56–60) but rust-proof.

❓ What’s your MOQ and pricing?

MOQ: 10 units for standard models; 50 units for custom sizes.
Pricing: $12–$50/unit (volume discounts available). For example:
- Ø12mm × 1000mm shaft: $22/unit (100+ units).
- SCS12UU bearing block: $18/unit (50+ units).

Pro Tip: Order a free sample (just pay shipping) to test before bulk purchasing.

❓ How fast can you deliver to the USA/EU?

Standard Models: 30 days (in stock: 7–14 days).
Custom Orders: 45–60 days (depends on complexity).
Express Shipping: DHL/FedEx in 3–5 days (additional cost).

99.5% on-time delivery rate—backed by a money-back guarantee if we miss the deadline.

❓ Do you offer installation support?

Yes! We provide:

CAD/STEP files for your design team.
Installation guides (PDF + video tutorials).
24/7 technical support via email/WhatsApp (+86 18134111662).
On-site training (for orders > $50,000).

❓ What’s your warranty policy?

2-year warranty against manufacturing defects. If your linear bearings or shafts fail under normal use within 2 years, we’ll replace them for free (shipping costs may apply).

❓ Can you match a competitor’s quote?

Absolutely. Send us the competitor’s quote, and we’ll beat it by 10% for equivalent quality. Our China supply chain + direct manufacturing allows us to offer unbeatable prices without sacrificing performance.

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Verified Customer Reviews

John Smith | CNC Machine Shop Owner (USA)

⭐⭐⭐⭐⭐ “Switched from a US supplier to YIDI last year. Their Ø20mm hardened shafts cost 30% less and lasted longer under heavy loads. The free CAD models saved my team hours in design. Highly recommend!”

Verified Purchase: 200 units (Ø20mm × 1500mm) | Delivered in 28 days

Elena Müller | Automation Engineer (Germany)

⭐⭐⭐⭐⭐ “We needed stainless steel shafts for a food packaging line. YIDI delivered SUS440C shafts with Ra 0.4μm finish—perfect for FDA compliance. The bearings ran 2x faster than our old supplier’s.”

Verified Purchase: 150 units (Ø16mm × 2000mm, SUS440C) | Delivered in 40 days

Raj Patel | Robotics Startup Founder (UK)

⭐⭐⭐⭐⭐ “As a startup, budget was tight. YIDI’s self-lubricating bearings cut our maintenance costs by 70%. Their team even helped us optimize our design for better performance. Will order again!”

Verified Purchase: 50 units (SCS8UU) + 50 shafts (Ø12mm) | Delivered in 35 days

Carlos Rodriguez | Industrial Equipment Distributor (Mexico)

⭐⭐⭐⭐ “Great product, but shipping to Mexico took 45 days (customs delay). The quality was excellent—no issues with the hardened chrome shafts. Next time, I’ll use express shipping.”

Verified Purchase: 300 units (Ø25mm × 3000mm) | Delivered in 45 days

Lee Min-ho | Semiconductor Equipment Manufacturer (South Korea)

⭐⭐⭐⭐⭐ “YIDI’s cleanroom-compatible bearings met our Class 100 standards. The low outgassing was critical for our wafer handling systems. Price was 20% lower than THK with same-day support.”

Verified Purchase: 100 units (LM20UU) | Delivered in 22 days (express)