Precision Bearing Screws | OEM Ball Screw Assemblies for Linear Motion - YIDI Motion
Bearing Screw Manufacturers | Custom OEM Ball Screw & Linear Motion Components | YIDI Motion
Meta Description: Trusted bearing screw suppliers offering precision ball screws, linear guides, and OEM assemblies. Factory-direct from China with ISO-certified quality, fast global shipping to USA, Europe. Reduce procurement risks with our engineering support.
Need Reliable Bearing Screws for Your Machinery?
We've supplied thousands of meters of precision bearing screws to assembly lines across North America and Europe. These aren't off-the-shelf parts—they're engineered for high-load linear motion in automation, robotics, and CNC machines.
As procurement managers know, a single failure in the screw drive can halt production for days. That's why our ball screw assemblies integrate high-precision bearings for zero backlash and extended life under heavy cycles.
Contact Adam: adam@yidimotion.com or +86 18134111662
Our Hebei factory ships container loads weekly—lead times under 25 days to major US ports.
Table of Contents
Common Pitfalls When Sourcing Bearing Screws
Procurement directors tell us the same story every week. You order ball screws from a low-bid supplier, only to find tolerances off by microns. Suddenly, your CNC spindle chatters, or the robotic arm drifts under load.
We've seen importers burn thousands on returns because the bearing preload wasn't matched to their duty cycle. Or worse—screws arrive with inadequate nut seals, letting contaminants in after just 500 hours.
- Undisclosed lead times stretch to 12 weeks, killing project deadlines.
- Mismatched pitch and diameter cause vibration in high-speed apps.
- No traceability means headaches during ISO audits.
- Hidden minimum orders trap you with excess inventory.
One US fabricator shared how a competitor's "precision" screw failed preload tests right out of the crate. They scrapped a $50k production run. Simple fix? Verify dynamic load ratings upfront.
Our advice: Always request preload charts and ball nut IP ratings before committing.
Understanding Bearing Screw Mechanics
Bearing screws—often called ball screws in precision engineering—replace sliding friction with rolling contact via recirculating steel balls. This cuts drive torque by up to 90% compared to acme leadscrews.
Core components: The screw shaft, typically SFU or SFV series ground to C5-C3 tolerances. Ball nuts house 4-12 circuits of 3-12mm diameter balls, preloaded for rigidity.
We machine shafts from SCM415 alloy steel, hardened to 58-62 HRC. Ends get custom bearing mounts—ABEC7 or P4 class—to handle axial/radial loads without pillow blocks.
Key metric: Critical speed. Exceed it, and you get whip. Formula's straightforward: N = (C * 10^5) / (L^2 * D), where L is unsupported length, D root diameter. We've optimized assemblies to spin at 3000 RPM cleanly.
In dirty environments? Opt for double-sealed nuts with grease fittings. They hold up in automotive transfer lines where others gum up.
Short sentence here: Preload matters. Zero preload? Backlash city. Fixed preload? Stiffer, but watch for heat buildup.
YIDI Motion Bearing Screw Assemblies
Our standard range covers 8-80mm diameters, pitches from 2-20mm. Custom OEM lengths to 6 meters, machined in-house.
What sets us apart: Integrated bearing ends. No separate mounts needed—saves you assembly time and alignment hassles. Nuts support fixed-fixed or floating configurations for long spans.
- C3 ground shafts for micron repeatability.
- DFU/DFU anti-backlash nuts, good for 50,000km travel life.
- Options for flange, cylinder, or trunnion mounts.
- Corrosion-resistant coatings for washdown apps.
Buyers switching from THK or NSK report our pricing at 60-70% less, with comparable DN values (diameter x speed).
Request Engineering Consult
Where Bearing Screws Excel
Pick any automated warehouse: Z-axis lifts rely on our 25mm pitch screws for 5G acceleration.
In semiconductor fabs, low-outgassing versions position wafers with sub-micron accuracy. Medical robots? Sterilizable coatings handle autoclave cycles.
We've shipped to US packaging lines where dual-screw setups sync fillers at 120/min. No binding, even under side loads.
Practical note: For vertical apps, factor self-locking. Above 5mm pitch, add brakes to hold position.
Inside Our Hebei Factory
HEBEI YIDI IMPORT AND EXPORT TRADING CO.,LTD—doing business as YIDI Motion since 2020. 100 employees, 30% senior techs. Imported DMG Mori grinders from Germany, Okuma lathes from Japan.
Annual output: 50km of ball screws. Full traceability via laser-etched batch codes. ISO 9001 certified, RoHS compliant.
We handle OEM/ODM end-to-end: From CAD review to container stuffing. Partners include US integrators moving from European suppliers amid lead time crunches.
Exports hit 50+ countries yearly. USA gets priority—FCL via Qingdao to LA/Long Beach in 18-22 days.
- Certifications: ISO9001, CE, RoHS. Full docs on request.
- Testing: Renishaw laser interferometers, dynamic stiffness rigs.
- Capacity: Rush orders under 10 days for stock diameters.
Visit us: 16-1-1601 Aobeigongyuan, Chang'an District, Shijiazhuang City, Hebei Province, China.
Global Shipping Realities
20ft containers hold 4-6 tons of screws, palletized for forklift unload. Duties? HS code 8483.40—check your FTA status.
We pre-pack with VCI paper to prevent rust en route. Incoterms: FOB/CIF standard. Air freight for prototypes: DHL/TNT, 3-5 days to ORD or LAX.
Warning: Avoid LCL if humidity-sensitive—consolidation yards breed condensation issues.
Typical lead: Stock 7-10 days, custom 20-30 days post-drawing approval.
Bearing Screw Specifications
| Model | Dia (mm) | Pitch (mm) | Dyn Load (kN) | Max Speed (RPM) |
|---|---|---|---|---|
| SFU1605 | 16 | 5 | 18.5 | 4000 |
| SFU2005 | 20 | 5 | 25.2 | 3500 |
| SFU2550 | 25 | 5 | 32.8 | 3000 |
| SFU3210 | 32 | 10 | 52.4 | 2500 |
| SFU4010 | 40 | 10 | 71.3 | 2000 |
screw bearing bearing with screw bearing shaft screw
Full catalog covers 50+ sizes. Tolerances to C5. Custom on request.
What Buyers Say
Mike R., Procurement Mgr, Ohio Automation: "Switched to YIDI's 32mm bearing screws for our palletizers. Half the cost of Hiwin, same stiffness. Installed in half a day—perfect tolerances."
Sarah L., Ops Director, Texas Robotics: "Custom 4m lengths arrived in 22 days to Houston. No whip at 1800 RPM. Great for our vertical gantries."
John K., Engineer, California CNC Shop: "DFU nuts held preload after 10k cycles. Better value than Bosch Rexroth imports."
Carlos M., Importer, Florida: "Prompt samples sealed the deal. Container arrived rust-free—logistics on point."
Frequently Asked Questions
What's the difference between ball screw and bearing screw?
Interchangeable in most contexts—bearing screw emphasizes the recirculating ball bearings that enable low-friction linear motion.
Can you do small OEM runs?
Yes, MOQ 5-10 units for customs. Prototypes in 7 days.
How do I calculate required size?
Share load, speed, stroke. We'll run the math—free.
Warranty details?
12-24 months. Covers manufacturing defects, not misuse.
Lower Your Sourcing Risks Today
Engineered precision. Factory-direct savings. Global reliability.
+86 18134111662 | adam@yidimotion.com | Contact Page
Written by Adam Li, Export Director, YIDI Motion
With 12+ years in linear motion exports. Last updated: October 2026.
