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.

17x40x12 Bearing: Reliable Deep Groove Option for Precision Machinery

Sourcing the right 17x40x12 bearing isn't just about matching dimensions. It's about ensuring your equipment runs without unexpected downtime. We've handled thousands of orders for this exact size—inner ring 17mm, outer 40mm, width 12mm—what pros call the 6203 equivalent. Factories like ours in Hebei churn these out daily, but not all suppliers deliver consistent quality.

Take a typical procurement manager at a mid-sized pump manufacturer. They're replacing bearings in submersible units, and the last batch from a cheap overseas vendor failed after 800 hours. Vibration issues, premature wear. Happens more than you'd think when specs look good on paper but materials fall short.

Our 17x40x12 bearings come from lines equipped with German precision grinders and Japanese heat treatment ovens. GCr15 steel, hardened to 58-62 HRC, with a mirror finish on raceways. We've seen these hold up in high-speed spindles and conveyor systems across 50+ countries. No fluff—just what works in real operations.

Why does this matter for your next order? Lead times can stretch if you're chasing samples from multiple factories. We keep stock ready for export, MOQ as low as 10 pieces for testing. Talk to us about your application—motors, fans, or automotive assemblies—and we'll spec it right.

Common Pitfalls When Buying 17x40x12 Bearings

Procurement teams face the same headaches year after year. You search "17x40x12 bearing wholesale," find a dozen Alibaba listings, but quality varies wildly. One batch runs quiet at 10,000 RPM; the next chatters after a week.

Lowball prices often mean thin chrome plating or inconsistent tolerances. We've inspected returned goods—raceways scored from poor grinding, cages cracking under load. Importers in the US lose weeks on rejections, eating into margins.

Another issue: mismatched seals. For dusty environments like woodworking shops, a basic metal shield won't cut it. Opt for 6203-2RS with rubber seals, but verify contact angle and grease type. Skip this, and contamination kills lifespan.

Lead times kill projects too. Small factories overload lines; big ones demand huge MOQs. We've shipped to Texas assemblers facing breakdowns—next-day air if needed, but plan for 7-14 days standard FOB Tianjin.

Exchange rates and duties add up. A $2 bearing sounds cheap until freight hits $0.50/piece. Factor in that, plus testing costs. Better to partner with a supplier who understands US import rules.

Why Our 17x40x12 Deep Groove Ball Bearings Deliver

These aren't off-the-shelf generics. We machine them in-house with tolerances to ABEC-3P or better—radial clearance C3 standard, but customizable. Load ratings? Dynamic 9.56 kN, static 4.8 kN. Perfect for radial loads in electric motors or gearboxes.

Parameter	Value
Bore Diameter	17 mm
Outer Diameter	40 mm
Width	12 mm
Dynamic Load	9.56 kN
Static Load	4.80 kN
Max Speed (Grease)	19,000 RPM
Material	GCr15 Chrome Steel
Seal Options	Open / ZZ / 2RS

25x52x15 bearing 20x47x14 bearing 20x42x12 bearing

Seal choices matter. ZZ metal shields for high temps up to 120°C; 2RS rubber for contamination protection, good to 80°C with lithium grease. We pack in anti-rust paper, vacuum-sealed for sea transit.

Noise levels under 3dB at rated speed—quiet operation in precision tools.
Vibration grade V2, per ISO standards.
Pre-lubricated; relube intervals stretch to 5,000 hours in moderate duty.
OEM branding available—your logo stamped on the outer ring.

Compared to SKF or NSK? Ours match 90% of performance at half the landed cost. Contractors swapping in our units report no failures in 18 months.

Inside YIDI Motion: Built for Export Reliability

Hebei YIDI Import & Export, est. 2020. 100 staff, 30% senior techs. Lines from Germany (grinding) and Japan (assembly). Annual output: 2M+ bearings.

We handle full linear motion too—ball screws, guides—but bearings are core. Exports to US, Germany, Japan. FOB Tianjin, CIF options.

Custom runs? 17x40x12 with special clearances or hybrid ceramics. MOQ 500 for mods. Samples ship in 48 hours.

Pro Tip: Test radial play with a feeler gauge on arrival. Should be 8-23 microns for C3. Anything over signals issues.

Where 17x40x12 Bearings Thrive

Electric motors top the list—washing machines, HVAC fans. Radial loads dominate; axial light.

Pumps: Centrifugal, submersible. Seals keep water out.
Conveyors: Food-grade grease variants available.
Auto: Alternators, wipers. High-speed stability.
Tools: Drills, grinders. Compact size fits tight spaces.
Agri: Irrigation reels, harvesters.

In humid US Midwest shops, 2RS seals cut ingress by half vs. open types. Lifespan jumps from 2 years to 5+.

Practical Installation and Maintenance

Press-fit inner ring, heat outer to 80°C for shrink fit. Use induction heater, not torch—avoids brinelling.

Alignment critical. Misalign by 0.01mm, and edge loading starts. Torque nuts to spec: 20-30 Nm typical.

Grease every 6 months or 2,000 hours. Lithium NLGI 2. Purge old stuff first.

Warning: Never mix grease types. Polyurea with lithium? Recipe for failure.

32232 Bearing

Logistics from Hebei to Your Door

FOB Tianjin: $0.20-0.40/piece LCL. Full 20ft container: 50,000 units, $1,200 freight to LA.

Duties: 2.5% US HTS 8482.10. Sea 25 days, air 5-7. Track via our portal.

Packing: Corrugated boxes, 50/pack. Palletized for stability.

Certifications & Compliance

ISO 9001:2015. RoHS compliant. REACH for EU. Material certs per batch.

US buyers: No ITAR issues. Conflict minerals free.

What Buyers Say

Mike R., Procurement Mgr, Texas Pump Co.
"Switched to YIDI 17x40x12 after SKF prices spiked. Zero DOA, running 2 years strong. Samples were key—saved a bad buy."
Mike R.