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 Shaft Bearings: Precision Components for Demanding Linear Motion

Sourced from our Hebei factory, these bearings handle high-load shafts in automation and machinery. OEM ready.

Procurement Risks
Our Ball Shaft Bearings
Factory Capabilities
Technical Specifications
Key Applications
Installation Notes
Shipping & Logistics
Certifications
Buyer FAQs
Customer Feedback

Common Risks When Sourcing Ball Shaft Bearings Overseas

Procurement managers know the drill. You search for ball shaft bearings, hit a few supplier sites, and quotes roll in. But half the time, lead times stretch, quality dips, or customs holds everything up. We've seen it too often in our 50+ country export network.

Take shaft alignment issues. Cheap bearings seize under load because tolerances are off by microns. Your linear motion system grinds to a halt mid-production run. Or material fatigue—those "precision" balls crack after 10,000 cycles when they should last 50,000.

Logistics bites hard too. A container from unvetted factories arrives with mixed batches. No traceability. You're stuck repacking or rejecting the lot. And pricing? Hidden fees for "upgrades" like RoHS compliance add 20-30% after handshake.

Off-spec tolerances leading to vibration and wear.
Extended lead times from supply chain bottlenecks in Asia.
Fake certs that don't pass your QA team's sniff test.
MOQ traps—forcing overbuy on untested product.

One US importer told us last quarter: "Lost a week debugging wobble from subpar bearings. Cost more than the parts." Procurement isn't just buying cheap. It's buying uptime.

Quick tip: Always demand dynamic load ratings upfront. Static ones lie.

YIDI Motion Ball Shaft Bearings: Built for Reliability

Our ball shaft bearings pair with ball spline shafts and linear guides in high-precision setups. Think CNC machines, robotic arms, packaging lines. We machine them in-house from GCr15 steel or stainless 440C, hardened to 58-62 HRC. Balls are grade 10 chrome steel—tight tolerances hold up under radial and axial loads.

Not reinventing the wheel here. These are recirculating ball designs, proven in automation. But we tweak for export: better corrosion resistance for humid US warehouses, smoother finishes to cut break-in lube needs. Customers report 20-30% less drag out of the box.

Why OEM/ODM? Your specs drive it. Want custom inner race profiles for eccentric shafts? We CAD it, prototype in 7 days. Full runs hit 5,000 units/month per line. No middlemen—direct from Hebei factory to your dock.

Operational note: Pair with our ball splines for zero backlash. Seen teams slash positioning error from 0.05mm to under 0.01mm.

Load handling stands out. Radial loads up to 15kN on mid-size units, moment loads for off-center apps. Friction coefficient hovers at 0.001-0.002 with proper grease. Lifecycle? Expect 50,000km travel distance in clean environments.

We've shipped these to German automation firms and US packaging giants. Feedback loops tight—tweak based on field wear data. That's experience talking.

Inside Our Hebei Factory: 100% Linear Motion Focus

YIDI Motion kicked off in 2020, but our core team brings 20+ years from bigger players. 100 employees, 30% senior techs. German-imported grinders, Japanese CNC for raceways—tolerances hit IT5/IT6 consistently.

Production flow: bar stock to rough turn, heat treat, grind, ball assembly, dyno test. Full traceability via QR codes. No batch mixing. Capacity scales—ball screws alongside bearings, linear modules too. One-stop for motion systems.

Export savvy: 50 countries, including USA, Germany, Japan. We handle Incoterms cold—FOB Tianjin port standard, DDP options. Compliance? RoHS, REACH pre-checked. Our mission: innovation, quality, reliability. Sounds corporate, but we live it.

Contact: +86 18134111662 or adam@yidimotion.com. Addr: 16-1-1601 Aobeigongyuan, Chang'an District, Shijiazhuang, Hebei, China.

By Adam Li, Export Director. Been shipping these since day one.

Detailed Technical Specifications

Here's the meat. Select models—custom on request.

Model	ID (mm)	OD (mm)	Length (mm)	Dyn Load (kN)	Stat Load (kN)
BSB-16	16	26	36	8.5	12.5
BSB-20	20	32	45	12.2	18.0
BSB-25	25	40	58	15.8	23.5
BSB-30	30	47	64	20.1	30.2

ball bearing shaft ball bearing with shaft radial ball bearing

Materials: GCr15 / 440C. Temp range: -20°C to 120°C. Grease: Lithium-based NLGI 2.

Real-World Applications

These shine in pick-and-place robots. Low friction means faster cycles without heat buildup. Or semiconductor handlers—cleanroom compatible, minimal particle gen.

Ball Screw Bearing

Packaging: Vertical lifts with side loads. Bearings take the torque without binding. Automotive assembly? Shafts guiding transfer lines. One client cut downtime by swapping bronze bushings.

Harsh spots too. With seals, they run in washdown zones. IP65 options seal out coolant mist.

Automation gantries
CNC tool changers
Material handling slides
Medical device actuators

Installation and Maintenance Essentials

Press-fit housing bores to H7. Shafts to h6. Align parallel within 0.02mm/300mm. Lube initial with 30% fill—too much drags.

Maintenance: Check preload every 5,000 hours. Grease intervals 500 hours under load. Warning: Run dry? Balls pit fast.

Pro tip from the floor: Micrometer raceway roundness pre-install. Catches dings early.

Global Shipping from Tianjin

Lead time: Stock 1-2 weeks, custom 4-6. 20' container fits 8,000 mid-size units. FOB $0.45-1.20/pc volume pricing.

USA bound? LCL via FedEx or consolidator. Duty? HS 8482.10—check your tariff code. We quote landed if needed.

Certifications and Compliance

ISO 9001:2015 - Quality management
RoHS - No lead/cadmium
REACH - EU chem regs
CE - Machinery directive ready

Full docs on request. Test reports per batch.

Frequently Asked Questions

What’s the difference between ball shaft bearings and standard ball bushings?

Ours handle spline shafts—anti-rotation torque plus linear motion. Bushings are plain shaft only.

Minimum order for OEM?

100 pcs prototype, 500 production. Discounts kick at 2,000.

Can you match competitor dims?

Yes—upload drawing. 98% hit rate on first pass.

Warranty?

12 months or 10,000 hours. Field failure <0.5%.

What Buyers Say

Mike R., Procurement Mgr, Ohio Automation: "Swapped in YIDI bearings on our gantry. Smoother than THK samples. Lead time beat quotes by 10 days. Will reorder."

Sarah K., Ops Director, Texas Packaging: "Handled side loads our old ones couldn't. Custom seals worked perfect in washdowns. Pricing fair—no surprises."

Tom L., Engineer, California Robotics: "Zero backlash with their splines. Tolerances spot on. Shipping to LA was seamless."

Carlos M., Supply Chain, Florida: "Tested samples—load ratings held. Full order inbound. Good comms from Adam."