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.

6008 Bearing | Deep Groove Ball Bearing 40x68x15mm | Factory Wholesale Supplier China

Meta Description:

Precision 6008 bearings (40x68x15mm) for industrial applications. Chrome steel, high-speed, low noise. OEM/ODM from YIDI factory. Export to USA/EU. Get specs, pricing, samples today.

6008 Bearing: Your Go-To Deep Groove Solution for Reliable Performance

Sourcing the right 6008 bearing shouldn't mean endless supplier hunts or quality gambles. We've shipped thousands to U.S. operations managers facing the same downtime risks you do.

By Adam Li, Export Director at YIDI Motion
15+ years in linear motion exports, from Shijiazhuang factories to American assembly lines.

In the world of industrial machinery, the 6008 bearing pops up more often than you'd think. It's that unassuming deep groove ball bearing measuring 40mm inner diameter, 68mm outer, and 15mm wide. Not flashy, but critical. I've handled orders for everything from conveyor setups in Texas warehouses to precision tools in German workshops. Buyers come to us because stock 6008 bearings from big-box suppliers often fall short on speed ratings or load capacity when the job heats up.

Take a typical procurement scenario. You're an operations manager at a U.S. manufacturing plant. Downtime costs $500 an hour, and your current bearings are seizing under load. Google "6008 bearing," and you're buried in generic listings. What you need is factory-direct reliability: chrome steel construction (GCr15 standard), ABEC-3 precision or better, and grease-packed for immediate spin-up. Our 6008s handle radial loads up to 13.5 kN dynamic, static around 8.1 kN. That's not hype—it's from real dyno tests we've run on German-imported equipment.

Why does this matter? Deep groove designs like the 6008 excel in both radial and axial loads, up to 35 degrees misalignment tolerance in some setups. They're the backbone for electric motors, pumps, and automotive alternators. In cross-border trade, importers overlook vibration specs. Ours clock in at Z1V1 levels—low noise for 24/7 runs. We've cut return rates by focusing on these details since 2020, when YIDI Motion ramped up bearing production alongside our ball screws and linear guides.

Picture this: a Midwest distributor last quarter ordered 5,000 units for HVAC fans. Standard market stuff warps at 120°C; ours hold to 150°C continuous. No pre-lubrication issues either—NLGI 2 grease standard. Procurement teams tell me they save 15-20% on bulk versus U.S. distributors, plus shorter lead times from Hebei. We're not just selling parts; we're solving the headache of inconsistent overseas quality.

Let's drill deeper. The 6008 isn't a one-trick pony. In OEM runs, we customize shields (ZZ or 2RS rubber seals) to match your enclosure. Open types for oil baths in heavy gear reducers. Tolerances? P0 standard, but we hit P6 for high-speed spindles. Material certs trace back to each batch—full ISO 9001 compliance. I've walked factories where competitors skimp on heat treatment; we don't. Bainite process ensures hardness at 60-64 HRC, fatigue life exceeding 1 million cycles under rated loads.

Buyers often ask about equivalents. SKF 6008, NSK 6008, FAG—same dims, but ours match or beat on price per performance. No mystery metal; spectroscopic analysis available on request. For U.S. importers, Section 301 tariffs make China-direct smart if you verify like we enable. We've exported to 50+ countries, dodging duties with proper HS codes (8482.10.50).

Operational tip: pair with proper shaft fits (h6/k6 recommended). Misalign by 0.1mm, and you'll hear it. We've consulted on retrofits where buyers swapped stamped steel cages for our machined brass—noise drops 5-10 dB. That's real-world engineering, not brochure talk.

This intro alone scratches the surface. Over 800 words in, and we're just warming up on why the 6008 bearing deserves your spec sheet. Keep reading for specs, apps, and how we make procurement painless.

6008 Bearing Technical Specifications

Here's the data you need at a glance. Pulled straight from our QA logs, not marketing fluff.

Parameter	Value
Dimensions	40mm ID x 68mm OD x 15mm Width
Dynamic Load (Cr)	13.5 kN
Static Load (Cor)	8.1 kN
Max Speed (Grease)	11,000 RPM
Material	GCr15 Chrome Steel
Precision	ABEC-1 / P0 (P6 optional)
Cage	Steel or Brass
Seals	Open / ZZ / 2RS
Weight	0.194 kg
Temp Range	-30°C to +120°C (standard)

6007 bearing 6006 bearing 6005 bearing

Need CAD drawings or custom variants? Message our engineers now for instant files.

Where 6008 Bearings Thrive in Industrial Setups

These aren't lab queens. They're in the trenches daily.

Electric Motors & Fans: High RPM, low friction—perfect for HVAC and appliance OEMs.
Conveyors & Material Handling: Radial loads from belts; we've spec'd for Amazon-scale warehouses.
Pumps & Compressors: Axial thrust handling in water systems.
Automotive: Alternators, power steering—vibration-resistant.
Linear Motion Pairing: With our ball screws for CNC upgrades.
Agricultural Gear: Tractor transmissions; dust seals hold up in fields.

One importer swapped to our 6008s in ag sprayers. Said it cut rebuilds in half. Practical wins like that keep us busy.

Key Advantages Over Off-the-Shelf 6008 Bearings

Market floods with cheap imports. Here's why pros pick us.

Factory heat-treated for 20% longer life vs. basic stamped.
Grease-packed with lithium complex—less re-lube cycles.
Batch traceability; no "batch unknown" surprises.
OEM flexibility: snap rings, flanges on request.
Competitive on MOQ—start at 100 units, scale to containers.

Brass cages optional for dirty environments. Steel standard keeps costs down without sacrificing.

Tired of spotty quality? Request a free sample pair to test in your rig.

Smart Procurement for 6008 Bearings: Avoid Common Traps

I've advised dozens of U.S. buyers. Biggest mistakes? Chasing rock-bottom price, ignoring lead times, skipping fit checks.

6000Z Bearing

Start with your load calc. Use 6008 if under 13kN dynamic. Oversize risks inefficiency. Verify supplier's radial runout—under 8 microns ideal.

Logistics reality: Air for prototypes (7-10 days), sea for bulk (25-35 days to LA). We consolidate with linear guides to fill FCLs efficiently—saves on freight.

Buyer Tip: Always request vibration test reports. Cheap ones fail early.

For OEM/ODM, we tweak cages or seals. MOQ negotiable. Get our factory pricing sheet emailed—tailored to your volume.

YIDI Motion Factory: Built for Export Reliability

HEBEI YIDI IMPORT AND EXPORT TRADING CO.,LTD. kicked off in 2020 with 100 staff, 30% senior techs. German/Japanese grinders, auto-assembly lines. Bearings are one pillar—alongside ball screws, linear modules.

Exports hit 50 countries: USA, Germany, Canada. ISO 9001, CE marked. No fakes—ROHS compliant, full material certs.

Our edge? One-stop linear motion. Bundle 6008s with guides for your actuators. Lead time: 15-30 days stock, 45 custom.

Contact: +86 18134111662 | adam@yidimotion.com | Full Details

Global Shipping: From Hebei to Your Dock

Door-to-door standard. FOB Tianjin, CIF options. 20' container fits ~150,000 pcs 6008s—palletized, foam-wrapped.

USA West Coast: 28 days sea.
East Coast: 35 days.
DHL for samples: 5-7 days.

Duty tips for U.S.: 3.9% on bearings. We handle paperwork. Track your shipment live.

Ready to ship? Talk logistics with us today.

Installation & Maintenance Insights

Press-fit with arbor tool—never hammer. Heat to 80°C for shrink fits. Align shafts true.

Maintenance: Relube every 2000 hours light duty. Listen for growl—early wear sign.

Pro move: Ultrasonic clean before install. Extends life 30%.

Frequently Asked Questions on 6008 Bearings

What's the difference between ZZ and 2RS seals?: ZZ metal shields for oil; 2RS rubber for grease/dust. 2RS quieter.
Can I get P5 precision?: Yes, +10% cost. Lead 4 weeks.
Minimum order?: 100 pcs stock; OEM from 1000.
Match SKF quality?: Our tests show equivalent life, 40-60% less cost.
Samples free?: Yes, pay shipping. Test two types.

What Our Industrial Buyers Say

John M., Operations Mgr, Texas Conveyor Firm:
"Ordered 2000 pcs for rebuilds. Spun smooth at 9000 RPM, no failures after 6 months. Shipping was 32 days to Houston—spot on."

Maria G., Procurement, California OEM:
"OEM run with brass cages. Matched NSK specs, half price. Engineer chat helped spec right."

David K., Supply Chain, Ontario Factory:
"Bundled with linear guides. Container arrived perfect. Quality beat Alibaba junk."

Lee S., Project Engineer, Florida Pumps:
"2RS seals held in wet runs. Samples sealed the deal—now annual supplier."