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.

Ball Screw Bearing Service: Precision Repair, Replacement & Custom Solutions

Reliable service for ball screw bearings from China's leading linear motion factory. OEM/ODM options. Exports to USA, Germany, Japan.

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Dealing with ball screw bearing failures can grind your operations to a halt. I've been in the linear motion game for over 12 years, first as an engineer on the shop floor, now handling exports for YIDI Motion. Ball screws are the backbone of precision machinery—CNC mills, lathes, automation lines—but those bearings? They're the weak link when preload wears out or contamination creeps in.

Our ball screw bearing service isn't some off-the-shelf fix. We specialize in disassembling, inspecting, and rebuilding assemblies with matched angular contact bearings, ensuring the exact preload and geometry your setup demands. Whether it's a standard SFU/DFU nut with 7002C bearings or a custom high-speed setup, we handle it from our Hebei factory. No middlemen, direct from production.

Picture this: a US importer last month had a batch of Taiwanese ball screws where bearings spun loose after 6 months. Downtime cost them $15k in lost shifts. We stripped it down, replaced with P4-grade bearings ground to 2-micron tolerance, and shipped back in 10 days. Back online, zero issues. That's the kind of service procurement managers call "bulletproof."

Why bearings fail isn't rocket science. Dust ingress through seals, improper lubrication, or thermal expansion mismatches. In humid factories or high-cycle robots, it happens fast. Our service starts with full disassembly—nut, screw, end supports. We check for brinelling, spalling, or raceway scoring under a Zeiss CMM. Then, precision reassembly with SKF or our house-brand equivalents, torqued to spec.

We're not just repairing. For repeat clients, we offer predictive maintenance kits: bearing preload gauges, lube injectors, and vibration sensors tied to your PLC. Cuts unplanned stops by half, from what I've seen across 50+ exports. And since we're OEM-capable, we match any footprint—DFU double-nut for heavy loads, or SFU singles for lighter duty.

Global supply chains being what they are, lead times matter. We stock common sizes: AC7015, 7202B, up to 7308 for larger screws. Custom grinds? 3-4 weeks with Japanese-imported grinders. Export to USA? DHL express or sea freight consolidated—under 2 weeks to LA ports typically.

Procurement folks hate risks. Fake certs, subpar materials, hidden fees. We publish our ISO 9001 docs upfront, RoHS compliant, and grease with Kluber NBU15 for food-grade if needed. No surprises. Talk to Adam on the line—he's our bearing specialist, 15 years in.

This isn't hype. In 2026 alone, we serviced 1,200+ assemblies for clients in automotive pressing lines, semiconductor wafer stages, and medical imaging tables. One German firm switched from local rebuilds after we hit 0.005mm runout on their 25mm dia screws. Efficiency jumped; they reordered quarterly.

Ball screw bearings demand precision. Angular contact types like 71900 series carry axial loads bidirectionally, essential for reversing motions. We match pairs for optimal contact angle—15° for speed, 25° for rigidity. Misalign one degree? Preload drops 20%, backlash creeps in.

From a buyer's view, evaluate suppliers on traceability. We laser-etch batch codes on every nut. Full material certs: 52100 steel hardened to 62 HRC, ceramic options for ultra-high speeds. And our vibration testing post-rebuild? Ensures DN values over 1.2 million.

If you're sourcing for USA ops, note the voltage: our testers run 110V kits. Logistics? We palletize in foam-lined crates, IP67 sealed. Duties? HS code 8482.10, we pre-clear paperwork.

Bottom line: our service extends ball screw life 2-3x over stock replacements. Not by magic—by grinding, matching, and testing like it's our machine. Ready to spec yours? Drop details below.

We've handled everything from miniature 8mm screws in pick-and-place to 80mm heavies in hydroforming presses. Each job teaches something. Last week, a Canadian client had galling from dry runs; we switched to graphited cages. Problem solved.

Compliance matters too. CE marked for EU, but for USA, we focus on ABEC 7/P4 equivalency. No shortcuts.

Common Procurement Risks in Ball Screw Bearings

Sourcing bearings sounds simple until a bad batch idles your line. I've consulted on dozens of failed imports. Here's what trips up buyers.

Preload Mismatch: Off-the-shelf bearings rarely match OEM specs. Leads to vibration, heat buildup. We've seen 30% life reduction.
Contamination During Shipping: Loose packaging invites grit. Always demand vacuum-sealed.
Fake P4 Grades: Visual inspections fool no one under load. Insist on CMM reports.
Lead Time Delays: "Stock" claims often mean 8 weeks. Verify factory capacity.
Custom Fit Oversights: Screw lead errors amplify bearing stress. Full assembly test required.

One importer ignored cage material—steel expanded in heat, locked up. Cost: $20k scrap. Vet suppliers hard.

YIDI's Ball Screw Bearing Service: The Fix

We treat your assembly like our own. Step one: receipt inspection. Ultrasonic clean, then magnaflux for cracks. Bearings out, races measured.

Rebuild uses duplex pairs—DB, DF, DT configs. Preload set via locknuts or springs, verified on Heidenhain encoders. Final run-in under load simulates your duty cycle.

Ball Screw Ball Nut Manufacturer

Service Options:

Full Rebuild: $150-500 per unit, depending on size.
Bearing Replacement Only: Matched sets from $50.
Custom OEM: Ground to drawing, 4-week lead.
Preventive Kits: Sensors + lube, $200/assembly.

Results? Customers report 40-50% uptime gains. Realistic, based on their logs.

Our Factory: Built for Precision

HEBEI YIDI IMPORT AND EXPORT TRADING CO.,LTD. – YIDI Motion since 2020. 100 employees, 30% senior techs. German DMG Mori grinders, Japanese Okuma lathes. Clean room for assembly.

Exports to 50+ countries: USA, Germany, Canada, France, Japan. Annual output: 50,000 ball screw units.

One-stop: ball screws, linear guides, actuators, splines, bearings. OEM/ODM full service.

Where Our Service Shines

CNC Machining Centers: Handles 10g accel, 60m/min rapids.
Robotic Arms: Low backlash for pick-place accuracy.
3D Printers: Smooth Z-axis, minimal step loss.
Packaging Lines: High-cycle endurance.
Medical Devices: Clean, low-noise operation.
Heavy Press Feeds: 5-ton axial support.

Technical Specifications Table

Bearing Type	Size (IDxODxW mm)	Contact Angle	Max Speed (RPM)	Load Rating (Dynamic C)	Preload Options
71904	20x37x9	15°	25,000	6.5 kN	Light/Med
7205B	25x52x15	40°	18,000	14.5 kN	Med/Heavy
7010AC	50x80x16	25°	12,000	29 kN	Heavy
Custom	To Spec	15-40°	DN >1.2M	Per Calc	Matched Pairs