Precision OEM Supplier | YIDI Motion Factory Direct
High-Precision Ball Screw Bearings
Engineered for Demanding Linear Motion Applications
Sourcing the right ball screw bearings isn't just about specs on paper. It's about keeping your CNC spindles running without chatter, your automation lines without backlash, and your lead times intact. We've supplied these to machine builders across the US and Europe for years.
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Common Pitfalls When Sourcing Ball Screw Bearings
Procurement teams know the drill. You order what looks like a bargain angular contact bearing for your ball screw setup, and two months later, it's whining under load or preloading unevenly. Happens more than you'd think, especially with offshore suppliers cutting corners on steel quality or grinding tolerances.
Lead times drag on because factories overload on generic parts. Then there's mismatch—bearings rated for low-speed robotics bolted into high-acceleration CNC mills. Preload goes haywire, lifespan halves. We've seen importers burn through three suppliers before getting it right.
Another headache: customs holds. Incomplete paperwork on RoHS compliance or ISO certs, and your container sits in Long Beach for weeks. Costs add up fast—demurrage, rushed air freight alternatives.
- Preload inconsistency: Leads to axial play, vibration in precision apps.
- Material flaws: Cheap chrome steel fatigues early under thrust loads.
- Accuracy grades off: C7 ball screw paired with C3 bearings? Recipe for backlash.
- Logistics delays: No FOB Qingdao clarity means surprises at discharge.
We've helped US machine shops dodge these by auditing their specs upfront. Short story: pair the right bearing type—single row angular contact for most, duplex for heavy thrust—with your screw's dynamic load rating.
Talk specs with our engineerWhy YIDI Ball Screw Bearings Deliver Where Others Falter
Our ball screw bearings start with through-hardened bearing steel from certified mills—GCr15 or equivalent, vacuum degassed for purity. No inclusions that cause spalling under 1 million cycles.
We specialize in angular contact designs: 15° or 25° contact angles, optimized for axial and radial loads in ball screw ends. Preload options from light (for smooth low-speed) to heavy-duty (for rigid milling). Accuracy to P4/P2, matching high-end C5/C3 screws.
Take our SF series single-row angular contacts. Matched pairs or sets for fixed-fixed or fixed-floating setups. Users report 20-30% less heat buildup versus off-brand imports, thanks to optimized cage designs—brass or polyamide, depending on speed.
Thrust bearings? We handle those too, like our 2347 series for end supports. Deep groove where radial rules, four-point contacts for combined loads. All ground on Japanese-imported profiles, no hobbing shortcuts.
Operational note: Always factor in your Dm*n limit—bearing mean diameter times RPM. Exceed it, and lubricant film fails. Our charts help spec this right.
Customization is standard here. OEM nut housings integrated? We machine that. Special seals for washdown? IP65 rated. We've shipped duplex pairs to German automation firms that run 24/7—no failures in 18 months.
Technical Specifications at a Glance
Here's a snapshot of our core ball screw bearing lineup. Full catalogs on request—PDFs with load curves, life calcs.
| Series | Type | Bore (mm) | OD (mm) | Accuracy | Max Speed (RPM) | Load Rating (kN) |
|---|---|---|---|---|---|---|
| SF10 | Angular Contact | 10 | 30 | P4 | 20,000 | Fa:8 / Fr:6 |
| SF15 | Angular Contact | 15 | 42 | P2 | 18,000 | Fa:15 / Fr:12 |
| 234712 | Thrust Ball | 60 | 150 | P5 | 5,000 | Fa:200 |
| Custom | OEM Duplex | Per Spec | Per Spec | P4/P2 | Per App | Matched Sets |
bearing ball screw screw ball bearing ball bearing screw
Notes: Dynamic load ratings based on ISO 76. Static to 4x dynamic. Greasable or sealed variants available.
Request Full CatalogWhere Our Ball Screw Bearings Excel
CNC machining centers. That's table one. High accel/decel demands rigid end supports—our duplex angular contacts hold 0.001mm repeatability.
Robotics arms next. Payload swings mean variable thrust; four-point bearings adapt without adjusting.
Semicon wafer stages. Ultra-clean, vacuum compatible. We spec hybrid ceramic balls for those—lower inertia, longer life.
Factory automation: XY gantries, pick-place. Matched sets ensure no misalignment after 10,000 hours.
Even medical imaging—CT scanners need whisper-quiet under resonance. Our P2 grades deliver.
Inside YIDI Motion: Built for Export Reliability
By Adam Li, Export Director
I've managed shipments to 50+ countries since YIDI started in 2020. Our Hebei factory runs 100 hands, 30% senior techs. German/Japanese grinders ensure micron-level faces.
100,000 sqm shop floor. Full vertical integration: from bar stock to assembly. Ball spline, linear guides too—one-stop for your motion system.
Certifications? ISO 9001:2015 audited yearly. RoHS, CE for EU. REACH compliant. Samples ship DHL next day; production 25-35 days post-PO.
OEM/ODM? We brand your logo on housings. Matched to THK/Hiwin dims for drop-in replacements.
Installation and Maintenance Realities
Mounting matters. Use a dial indicator for preload—hand-tight plus 1/4 turn for light duty. Hydraulic nut for big duplex sets.
Lube right: Kluber NBU15 for high-speed, or grease every 500 hours runtime. Misalign by 5 arcmin? Balls skid, cage wears.
Maintenance: Vibration check quarterly. Spike at 2x RPM signals outer race brinelling. Swap pairs together—mismatch kills life.
Warning: No dry runs over 30 seconds. Starvation kills fastest.
Feedback from Procurement Pros
John M., Operations Manager, Ohio CNC Shop
"Switched from Asian generic to YIDI duplex 20TAC. Chatter gone on aluminum mills. Lead time half what SKF quoted. Solid for repeat buys."
Maria G., Automation Distributor, Germany
"P4 accuracy spot-on for our gantry robots. Preloaded sets arrived matched, no setup fuss. Export docs flawless—customs cleared in days."
Raj P., Machine Builder, India
"OEM run of 500 pairs. Tolerances held, thrust ratings beat spec. Good partner for scaling production."
Mike T., Supply Chain, Canada
"FOB pricing beat domestic by 40%. Quality held up in vertical mills. Will reorder for actuators."
Frequently Asked Questions
What preload class for my ball screw?
Light for positioning, medium for contouring, heavy for rigid machining. Share your Dn and we'll recommend.
Minimum order quantity?
Samples: 1-5 sets. Production: 50 pairs. Volume discounts kick in at 200+.
Lead time to USA?
Samples: 3-5 days air. Bulk: 4 weeks sea from Tianjin, tracking provided.
Compatible with NSK or THK screws?
Yes, standard metric dims. We match ABEC or JIS grades.
Ceramic hybrids available?
For high-speed/vacuum. +25% cost, double life.
Procurement and Global Shipping Details
Ex-works Shijiazhuang or FOB Tianjin/Qingdao. 20' container holds 5,000 pairs typically. Duties? We provide HS codes: 8482.10.
Payment: 30% TT advance, 70% sight LC or post-inspection. Escrow for first-timers.
Pro tip: Consolidate with linear guides—saves freight. We've packed mixed pallets to LAX without issues.
Ready to Spec Your Ball Screw Bearings?
HEBEI YIDI IMPORT AND EXPORT TRADING CO., LTD.
16-1-1601 Aobeigongyuan, Chang'an District, Shijiazhuang City, Hebei Province, China
+86 18134111662 | adam@yidimotion.com
YIDI Motion: Ball Screws, Linear Guides, Bearings | Exported to 50+ Countries Since 2020
