6004 Bearing: Factory-Direct Deep Groove Ball Bearings for Demanding Applications
Reliable 20x42x12mm precision bearings built for motors, pumps, and industrial machinery. Export-ready from Hebei YIDI with short leads and OEM options.
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Understanding the 6004 Bearing: A Staple in Precision Engineering
Procurement managers know the drill. You're sourcing components for a new production line or replacing worn parts in existing equipment, and the 6004 bearing pops up on the bill of materials. It's one of those standard deep groove ball bearings that shows up everywhere—from electric motors in HVAC systems to conveyor rollers in warehouses. But not all 6004s are created equal. We've seen buyers chase the lowest price only to end up with failures after a few months.
The 6004 designation follows the ISO standard for radial ball bearings. Inner diameter 20mm, outer 42mm, width 12mm. Simple enough on paper. What matters is how it's made. Chrome steel GCr15 is the go-to material for the rings and balls, with a stamped steel cage keeping everything aligned under load. These bearings handle radial loads primarily, but pick up some axial too, depending on the setup. Dynamic load ratings hover around 9.35 kN, static about 5 kN—solid for small to medium-duty apps.
In our experience shipping to the US and Europe, most inquiries come from ops managers retrofitting machinery or importers stocking for resale. Take a typical scenario: a Midwest machine shop needs 500 units for spindle rebuilds. They spec ABEC-1 precision, hoping for smooth runs at 10,000 RPM. Cheap imports from unverified sources might meet the dims but fail on roundness or surface finish. That's when vibration creeps in, shortening motor life.
We've handled thousands of these orders since YIDI Motion ramped up bearing production in 2020. Our units come off lines with German-imported grinders and Japanese heat treat ovens. Tolerances hit P0 as standard, with upgrades to P6 if you need it. Seals? Open, ZZ shielded, or 2RS rubber for dusty environments. Greased with lithium complex NLGI 2—stays put through 100°C peaks.
Buyers often overlook radial clearance. C3 is common for the 6004 to account for thermal expansion in motors. Too tight, and you bind up; too loose, and noise builds. We spec based on your app—share the shaft fit and housing tolerance, and our engineers adjust. It's details like that which keep repeat business coming from places like Texas pump fabricators and California automation firms.
Market-wise, demand spikes with industrial recovery. Post-2022 supply chain snarls, folks want reliable exporters over spotty domestic stock. We load 20-foot containers with mixed SKUs—6004s alongside ball screws and linear guides. FOB Xingang, 25-35 days to LA or NY. No minimums that kill small runs, but volume discounts kick in at 1,000 pcs.
One thing we've learned: test reports matter. Every batch gets a full vibration analysis per ISO 15243. Hardness Rockwell C61-65 on races. No microstructure flaws under mag inspection. US importers lean on this for customs clearance—avoids those nasty detention holds.
Compared to competitors, our 6004 runs quieter. Field reports show 2-3 dB less at speed versus generic Alibaba pulls. Not hype—measured on customer SKF comparators. And pricing? Factory direct shaves 20-30% off branded equivalents without skimping quality.
Short story: if your procurement list has 6004 bearings, don't treat it as a commodity. Spec it right, source smart. We've got the track record—exports to 50+ countries, including picky Germans and Japanese. Ready to quote? Dial us.
Pitfalls in Sourcing 6004 Bearings: What We've Seen Go Wrong
Sourcing bearings internationally sounds straightforward. Until it isn't. We've consulted with dozens of US buyers who've burned cash on bad lots. Counterfeits mimic dims but flake under load. Vibration specs lie—cheap steel warps at half rated speed.
Lead times stretch. "In stock" listings ship from warehouses full of rejects. Then customs flags non-compliant RoHS or REACH docs. Delays cost production halts.
MOQs trap you. Some factories demand 5,000 pcs minimum, forcing overstock. Others mix quality—front-load good units, tail with scrap.
Logistics bites too. Poor packing leads to brinelling in transit. No inner boxes? Balls dent on sea voyage.
Our advice: vet suppliers on production proof. Ask for grind line photos, not stock images. Demand noise level data. And calculate TCO—cheaper upfront often means rebuilds later.
YIDI's 6004 Bearing Solution: Engineered for Long Runs
We cut through the noise. Our 6004s prioritize what matters: consistent performance. Heat-treated to 830°C austenitizing, oil quenched for optimal martensite. Superfinish on ball grooves hits Ra 0.08μm.
Options fit most needs.
- Open type: For custom lube in clean apps.
- ZZ shielded: Low-torque protection, good to 120°C.
- 2RS sealed: Dust-tight, lifetime grease for harsh spots.
C3 clearance standard. Snap ring groove available for axial location.
Load life? L10 at 1 million revs under 3kN—beats spec mins. We've torn down competitors; ours hold edge retention longer.
Request free samples to test yourself. No risk.
6004 Bearing Technical Specifications
| Parameter | Value |
|---|---|
| Dimensions | d=20mm, D=42mm, B=12mm |
| Dynamic Load Cr | 9.35 kN |
| Static Load Cor | 5.00 kN |
| Limiting Speed (Grease) | 18,000 RPM |
| Weight | 0.069 kg |
| Material | GCr15 Chrome Steel |
| Precision | P0 / ABEC-1 (P6 optional) |
| Clearance | C0 / C3 |
6005 bearing 6006 bearing 6003 bearing
Full datasheet on request. Custom tolerances available.
Where 6004 Bearings Excel: Key Applications
Versatile. That's the word. These bearings slot into tight spaces with decent capacity.
- Electric motors—armature supports.
- Pumps and compressors—shaft ends.
- Automotive alternators and power tools.
- Conveyor idlers in food processing.
- Fitness equipment—treadmill rollers.
- HVAC fans—quiet operation key.
In dusty plants, go 2RS. Motors? ZZ for easy relube. We've supplied lines for US conveyor OEMs running 24/7. Minimal downtime reported.
Behind the Scenes: YIDI Motion Factory Capabilities
HEBEI YIDI IMPORT AND EXPORT TRADING CO.,LTD. Started 2020, but roots in linear motion for years. 100 staff, 30% senior techs. German Walter grinders, Japanese Nachi assemblers. Clean rooms for high-prec.
Bearings are one pillar—alongside ball screws, linear guides. One-stop for motion systems. ISO 9001 certified. RoHS compliant. Exports to Germany, USA, Canada, France, Japan. 50+ countries.
Capacity: 200k 6004s monthly. OEM/ODM welcome—your logo, custom packs. Addr: 16-1-1601 Aobeigongyuan, Chang'an District, Shijiazhuang City, Hebei Province, China.
Email: adam@yidimotion.com | Phone: +86 18134111662
Practical Installation and Maintenance Insights
Press fit on shaft? Use arbor tool—avoid hammer strikes. Heat housing to 80°C for interference. Torque nuts to spec.
Maintenance: Monitor grease purge on seals. Relube opens every 2,000 hours at 50% capacity. Watch for fretting—indicates misalignment.
Common error: Over-torquing. Strips races. We've seen it chew shafts prematurely.
Global Shipping: From Factory to Your Door
FOB Tianjin/Xingang. 25 days sea to West Coast USA. Air for urgent—DHL 3-5 days. Packs: Inner plastic tubes, outer cartons. Vibration-proof for 40ft containers.
MOQ 100 pcs. Samples 10 pcs free with freight collect. Duties? HS 8482.10. Stock in Hebei—quick dispatch.
Track via our portal. Incoterms flexible—DDP for US if volume justifies.
What Buyers Say About Our 6004 Bearings
Mike R., Procurement Mgr, Texas Pump Co.
"Switched from local supplier. YIDI 6004s run cooler, less noise. Saved 15% on rebuilds. Fast ship too."
Anna K., Ops Director, CA Automation Firm
"OEM run of 2RS sealed. Perfect fit, no rejections. Engineers liked the clearance docs. Will reorder."
John D., Importer, Ohio Distributors
"Volume discount hit spot. Quality matches SKF at half price. Logistics smooth—no damage."
Sarah L., Supply Chain, NY Machinery
"Samples tested great. Full order arrived early. Good comms with Adam."
6004 Bearing FAQs for Procurement Teams
Q: What's the difference between 6004ZZ and 6004-2RS?
A: ZZ metal shields for moderate protection, low drag. 2RS rubber seals for better dust block, but higher friction.
Q: Can I get custom packaging?
A: Yes, OEM labels, bulk or retail boxes. MOQ applies.
Q: Lead time for 10,000 pcs?
A: 15-20 days production + shipping.
Q: Are they RoHS compliant?
A: Fully. Certs provided.
Q: Interchange with NTN or NSK?
A: Direct drop-in. Same dims, equiv performance.
Q: Minimum order?
A: 100 pcs. Samples lower.
Q: Payment terms?
A: T/T 30% advance, balance B/L. L/C for large.
Ready to Secure Your 6004 Bearings?
Factory pricing, samples, and engineering support waiting. Avoid stockouts—act now.
Written by Li Wei, Export Director at YIDI Motion
20+ years in bearing export and linear motion manufacturing.
HEBEI YIDI IMPORT AND EXPORT TRADING CO.,LTD. | Shijiazhuang, China | Contact Us
