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.

6804 Bearing: Reliable Thin-Section Deep Groove Ball Bearings from Factory Direct

20x32x7mm precision bearings for high-speed machinery. OEM/ODM ready. Export quality to USA, Europe.

Get factory pricing now – Ships worldwide from Hebei, China.

YIDI Motion 6804 bearing production line

1. Why Procurement Managers Choose 6804 Bearings
2. Common Risks in Sourcing Thin Bearings
3. 6804 Bearing Technical Breakdown
4. Real-World Applications
5. Installation and Maintenance Tips
6. YIDI Motion Factory Capabilities
7. Logistics from China to Your Door
8. Certifications and Compliance
9. Buyer Reviews
10. Frequently Asked Questions

Why Procurement Managers Keep Coming Back for 6804 Bearings

I've handled bearing orders for machine tools and automation lines across three continents. The 6804 bearing pops up more than you'd think. It's that go-to thin-section option when space is tight but loads can't be ignored. At 20mm inside diameter, 32mm outside, and just 7mm wide, it slips into compact assemblies without drama.

Procurement folks in the US and Europe search for it because stock from local distributors runs dry fast, or prices spike. We see repeat inquiries from operations managers fitting these into spindle motors or robotic arms. Not flashy, but critical. One importer last month ordered 5,000 units after a prototype test – said it cut vibration issues by half compared to off-brand stuff.

These aren't hobby-grade parts. Deep groove design handles radial and some axial loads. Open or sealed versions available. We stock both at YIDI Motion. Matter of fact, our line runs SF prefix for stainless if corrosion's a worry in your setup.

Search "6804 bearing" and you'll hit specs sheets galore. But buyers want more: reliable supply, custom tolerances, and no hidden minimums killing small runs. That's where factories like ours in Hebei step in. We've shipped to Texas machine shops and German precision firms since 2020. No middlemen markup.

Think about your last bearing headache. Lead times stretching months? Quality dipping on bulk buys? Or customs holding shipments over certs? We tackle those head-on. Our 6804s meet DIN 625 standards, with vibration levels at Z1 or better on request.

Operations managers tell us these bearings shine in continuous duty. Pair them with linear guides from our catalog, and you've got smooth motion without play. One client in Canada retrofitted CNC spindles – downtime dropped noticeably.

Enough intro. Let's dig into why sourcing goes wrong so often, and how the right 6804 fixes it.

Common Risks When Sourcing 6804 Bearings – And How to Avoid Them

Spot a low quote online? Pause. We've seen importers burn cash on bearings that seize after 500 hours. Thin-section like 6804 demands tight tolerances. Cheap steel warps under heat. Suddenly, your production line's idle.

Risk one: Material shortcuts. Chrome steel GCr15 is standard, but skimpers use recycled scrap. Check hardness – should hit 60-65 HRC. We test every batch.

Two: Vibration grades. Z2V or V3 matters for high-speed. Basic Z0 fails quick in motors over 10,000 RPM. Ask for noise test data upfront.

Three: Packaging fails. Bearings arrive chipped from poor boxing. We double-wrap in vacuum bags, then foam-lined cartons. Cuts damage claims to near zero.

Procurement directors overlook lead times too. Spot market? 8-12 weeks from Asia. Our stock program ships 1,000 units in 7 days.

Customs risks hit US buyers hard. No ROHS or REACH docs? Delays pile up. We include full packs.

Verify inner ring chamfer – min 0.3mm prevents edge cracking.
Insist on grease type: lithium NLGI 2 for most apps.
Compare cage: steel stamped vs. brass for high temp.

One warning: Avoid unbranded Alibaba specials without factory audit. We've reverse-engineered failures – undersized balls by 10 microns. Total loss.

Quick Tip: Request a free sample pack of 10 pcs. Test in your rig before committing.

6804 Bearing: Full Technical Specs and Performance Data

Core dimensions: 20x32x7mm. Dynamic load Cr around 5.5 kN, static Cor 2.95 kN. Limiting speed? 19,000 RPM grease lubed, 22,000 oil.

Parameter	Value	Notes
d (ID)	20mm	Shaft fit h6 typical
D (OD)	32mm	Housing H7
B (Width)	7mm	Thin profile
Cr (Dynamic)	5.5 kN	P0 tolerance
Cor (Static)	2.95 kN	Max load
Speed (Grease)	19,000 RPM	Standard
Weight	0.018 kg	Per unit

6803 bearing 6805 bearing 6806 bearing

Options: 6804ZZ (metal shields), 6804-2RS (rubber seals), 6804 2RS V3 (low noise). Tolerances P0 standard, P6 on demand. Heat treatment to 150°C intermittent.

Compared to 6904 (thicker), 6804 saves space. Versus 608 miniatures, handles more load. Ideal swap for NSK 6804DDU equivalents.

Our engineer notes: Ball count 7-8 typical. Cage snaps in during assembly – no press needed if aligned.

Applications Where 6804 Bearings Excel

Spindle motors in CNC routers. Robotic joint pivots. Electric bike hubs. Even dental drills – anywhere radial loads meet slim profiles.

US manufacturers use them in packaging machines. High-speed indexing without slop. One automation firm in Ohio runs 6804s 24/7 – grease lasts 2,000 hours easy.

In linear actuators, pair with our ball screws. Reduces deflection under 50kg push. Distributors stock for HVAC fans too – quiet operation wins bids.

Precision instruments: Optical scanners.
Power tools: Angle grinders.
Textile machinery: Yarn guides.
Medical devices: Pump rotors.

Harsh environments? Go stainless 6804SS. Resists washdowns in food processing.

Installation Insights from the Factory Floor

Heat the housing to 80°C max. Tap in with soft mallet – no hammer strikes. Arbor press for tight fits.

Lube tip: Don't overpack. 30% fill for high speed. Align shafts true – 0.01mm runout kills life.

Common mistake: Ignoring preload. Light for speeds, firm for rigidity. Test whirl after fit.

Maintenance: Listen for growl. Means contamination. Flush with solvent, repack yearly in dirty apps.

YIDI Motion: Our Factory Strength for 6804 Bearings

Hebei YIDI Import & Export Trading Co., Ltd. – that's us. YIDI Motion since 2020. 100 staff, 30% senior techs. German/Japan grinders, auto assembly lines.

Bearings are core. We make 6804 alongside ball screws, linear guides. One-stop for motion parts. OEM/ODM? Full service. Etch your logo, tweak clearances.

Exports to 50+ countries: USA, Germany, Japan. 20ft container holds 80,000 pcs packed smart.

6204Rs Bearing

No fluff. Our mission: Innovation, quality, reliability. Phone +86 18134111662. Email adam@yidimotion.com. Shijiazhuang base.

OEM Edge: Min 500 pcs for custom. Lead 25 days. Specs locked via signed drawings.

Logistics: Getting Your 6804 Bearings from China Fast

Express: DHL 3-5 days to LAX. Air freight 7 days full pallet. Sea: 25-35 days to LA port, $2,500/20ft.

We handle docs: Commercial invoice, packing list, CO, FORM A if needed. Incoterms FOB/CIF your call.

Container optimization: 1.2 tons max for 6804s. Anti-rust paper between layers.

US duties low – HS 8482.10. Free trade zones welcome samples.

Certifications Backing Our 6804 Bearings

ISO 9001:2015 audited yearly. ROHS compliant. REACH registered. CE marked for EU.

Factory tests: Salt spray 48hrs, life run 1M cycles. Traceable serials per lot.

What Buyers Say About Our 6804 Bearings

Mike R., Procurement Manager, Texas Automation Ltd.

"Switched to YIDI 6804ZZ after SKF delays. Vibration way down in our spindles. Shipped DHL, here in 4 days. Pricing beat quotes by 25%. Will reorder 10k."

Anna K., Operations Director, Ontario Robotics