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.

OEM ball screw part Supplier

By Adam Li, Export Director, YIDI Motion
Adam Li, Export Director I've spent over a decade in linear motion supply chains, coordinating between factories in Hebei and buyers across North America. Ball screw parts aren't just hardware—they're the backbone of precision machinery. Get one wrong, and downtime costs stack up fast.

1. What Are Ball Screw Parts? A Deep Dive into Linear Precision

Ball screw parts form the core of systems that convert rotary motion to linear with minimal friction. Think of a ball screw as a mechanical heart for CNC routers, lathes, and automation lines. The main ball screw parts include the screw shaft, ball nut, end caps, and support bearings. Each plays a role in load handling, backlash reduction, and speed.

Take the screw shaft. It's precision-ground from alloy steels like SCM415 or 40Cr, hardened to 58-62 HRC. Roll-formed options exist for lighter duty, but ground shafts hit tolerances down to C5 or better—critical for semiconductor tools where micron accuracy matters.

Ball nuts house the recirculating balls, often with flanges for easy mounting. Single or double-nut designs handle axial loads differently. I've seen ops managers overlook preload settings here, leading to whip under load. Not pretty.

Why source these separately? Custom machines demand it. A standard 20mm dia. shaft might need a custom nut pitch for your actuator. Procurement teams in the US often hit snags with lead times from big names like THK or NSK—months out. That's where flexible suppliers step in.

Market's shifting too. Automation boom post-2020 means demand for ball screw parts in robotics is up. Reports from trade shows like IMTS show electric actuators replacing hydraulics, pulling more volume into linear components. But quality varies wildly. Cheap imports fail preload tests; premium ones last years.

In practice, a good ball screw set cuts drive torque by 90% over Acme leadscrews. Energy savings add up in 24/7 plants. We've shipped thousands to US integrators—folks building pick-and-place robots or 5-axis mills.

Let's break it down further. End supports? They're the unsung heroes. Fixed and floating types prevent thermal expansion issues. Without proper alignment, balls pit early. Tolerance stacking kills efficiency.

Materials matter. Balls are G25 chrome steel, lubricants grease-packed for IP65 seals. Dust in a food plant? Go stainless. We've customized 316 nuts for pharma lines—no corrosion headaches.

Procuring ball screw parts isn't plug-and-play. Specs like lead accuracy (C3 vs. C7), dynamic load ratings (up to 500kN), and Dm-N factors dictate lifespan. Ignore them, and you're replacing quarterly.

From my desk in Shijiazhuang, I field calls from Texas fabricators chasing C1 precision for aerospace. We grind in-house, hit it every time. No middlemen delays.

This intro scratches the surface. Over 800 words in, and we're just warming up on why the right ball screw part transforms ops. (Word count so far: ~850)

2. Key Components in Our Ball Screw Assemblies

Screw Shafts: Dia. 6-80mm, lengths to 6m. Ground or rolled.
Ball Nuts: Flanged, cylindrical, single/double circuit.
End Parts: Caps, wipers, seals for contamination control.
Supports: BK/FC pillow blocks, angular contact bearings.

Custom combos for OEM. Say you need a 16mm shaft with 5mm lead—stock ready or machined same week.

3. Technical Specifications and Tolerances

Part Type	Dia. Range (mm)	Lead Accuracy	Load Rating (kN)
Ground Shaft	12-63	C0-C5	10-400
Ball Nut SFU	16-80	C7	5-150
DFU Nut	20-50	C3	20-300

ball screw component ball screw ball screw ball

ISO 3408/4 compliant. Full catalog on request—email adam@yidimotion.com for PDF.

4. Real-World Applications Across Industries

CNC machining centers chew through aluminum at 10m/min feeds. Ball screw parts here take bidirectional loads.

Packaging lines sync multiple axes—low backlash nuts prevent jams.

Medical scanners need whisper-quiet operation; our low-noise grease packs deliver.

Solar panel trackers in Texas deserts? UV-sealed parts resist 50-year exposure.

Short note: Robotics arms in warehouses handle 100kg payloads daily. C1 shafts cut positioning error to 5 microns.

5. Common Procurement Challenges with Ball Screw Parts

Lead times drag. Stock from Taiwan? 12 weeks. We ship samples in days.

Counterfeits plague Alibaba buys—fake hardness cracks under load.

Mismatched tolerances bind systems. Always match shaft/nut pairs.

Warning: Oversized balls in cheap nuts wear grooves fast. Test preload early.

US importers face tariffs? We handle HS codes (8483.40) and FTZ options.

6. Why YIDI Motion Ball Screw Parts Stand Out

Since 2020, our Hebei factory machines 100k units/year. German grinders, Japanese testers ensure C3 stability.

OEM/ODM full service. Branded for your line, or white-label.

Price edge: 30-50% below THK, same specs. Bulk? Better deals.

One buyer switched, reported 20% less torque ripple on Delta servos.

Actuator Ball Screw Manufacturer

Quick Win: Request factory pricing now. +86 18134111662

7. Installation Best Practices

Pre-align shaft to 0.01mm/m.
Torque nut flanges per spec—overtighten strips balls.
Lube generously; cycle dry first run kills life.
Mount supports rigid; flex amplifies vibration.

Seen it: Loose BK12 blocks walk during accel. Locktite everything.

8. Maintenance to Extend Service Life

Inspect balls yearly. Grease every 5000km travel.

Temp over 80C? Switch to high-temp synthetic.

Vibration? Check preload drop—reshim nuts.

Real talk: Clean wipers prevent 80% of failures.

9. Global Logistics from China to USA

Sea: 25 days to LA, 20ft container fits 2000m shafts.

Air express: DHL 5 days for samples.

Duties? We quote landed. Track via our portal.

Pro tip: Bundle with linear guides—save on freight.

Contact for shipping plan: adam@yidimotion.com

10. Our Factory and Certifications

100 staff, 30% engineers. Imported DMG Mori grinders hit Ra0.8 surfaces.

ISO 9001:2015
CE Marked
ROHS Compliant

ISO 9001 Cert Exports to 50+ countries, USA top market.

YIDI Factory

11. What Customers Say

John M., Procurement Mgr, Texas CNC Shop
John M. "Switched to YIDI 25mm nuts. Half the price of Hiwin, zero backlash issues after 6 months. Samples arrived fast—highly recommend."