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.

Bearing 607 / 629 Supplier: Deep Groove Ball Bearings for High-Precision Applications

Reliable wholesale source for 607 and 629 metric ball bearings. Factory-direct pricing, OEM customization, and global export from Hebei YIDI Motion. Ideal for motors, actuators, and linear systems—get specs, samples, and quotes fast.

1. What Are Bearing 607 and 629?
2. Common Procurement Challenges in Miniature Bearings
3. Why 607/629 Bearings from YIDI Motion Excel
4. Detailed Technical Specifications
5. Real-World Applications and Case Insights
6. Installation and Maintenance Tips
7. Our Factory Capabilities and Certifications
8. Logistics for USA and Global Export
9. Customer Reviews from Procurement Teams
10. Buyer FAQ
11. Next Steps: Request Your Quote

Bearing 607 / 629: The Go-To Miniature Deep Groove Ball Bearings

Every procurement manager knows the frustration of chasing down reliable miniature bearings that won't fail under load. Bearing 607 and 629 have been workhorses in small machinery for decades. The 607 measures 7mm inner diameter by 19mm outer, 6mm wide. Its sibling, the 629, steps up to 9x26x8mm. Both are standard deep groove designs, single-row, with full complement of steel balls for smooth radial and light axial loads.

We've shipped thousands of these from our Hebei factory to U.S. distributors, European OEMs, and Asian assemblers. They're not flashy, but they deliver where it counts—high rotational speeds up to 30,000 RPM, low friction coefficients around 0.001, and dynamic load ratings from 1.9kN for the 607 to 4.5kN on the 629. Made from GCr15 chrome steel, heat-treated to 58-62 HRC, these hold up in dusty environments or clean rooms alike.

What sets them apart in B2B buying? Availability. Too many suppliers quote lead times that stretch into months, or send subpar imports with brinelling after a few weeks. At YIDI Motion, we stock common variants—open, shielded (ZZ), sealed (2RS)—and can spin up custom lubes or tolerances on demand. Procurement teams tell us they cut reorder cycles by switching to us, especially when integrating into linear actuators or ball screw assemblies.

Think about your last bearing headache. Vibration issues from poor tolerances? Contamination in washdown apps? These 607/629 units come with C2 or C3 clearances standard, and we offer ABEC-3 precision as baseline, ABEC-5P for speed demons. Grease-packed with lithium NLGI 2, they run quiet and cool. No wonder they're spec'd in everything from RC drone motors to medical pumps.

Over the years, we've seen demand spike for these in automation gear. U.S. buyers, in particular, want quick container loads to avoid tariffs or shortages. Our MOQs start at 100pcs for samples, scaling to pallets or full 20ft containers without price jumps. Pricing? Competitive at $0.50-$1.20 per unit depending on quantity and seals, but let's talk specifics for your RFQ.

Procurement Risks with Miniature Bearings Like 607/629

Sourcing bearings sounds straightforward until a batch arrives undersized or noisy. I've handled complaints from ops managers where 607s measured 6.98mm ID instead of 7mm—enough to bind in a shaft fit. Common traps include fake certifications from no-name exporters or grease that migrates under heat.

Risk one: Quality variance. Metric standards like ISO 15 and DIN 625 get ignored by low-end factories. We stick to them rigidly, with CMM inspections every shift. Risk two: Lead times. Spot buys from Alibaba can hit 45 days; we quote 7-15 days ex-works. Risk three: Logistics snafus—partial fills or damaged cartons. Our packing uses anti-rust paper and foam separators, holding up through sea freight to LA or NY ports.

Buyers often overlook tolerance classes. For high-speed spindles, CN normal clearance works, but for thermal expansion in motors, C3 prevents preload. We've advised clients to spec P0 over P6 unless vibration matters. Another pitfall: Mixing open and sealed. 2RS versions cost 20% more but save weeks in assembly lube time.

Finally, counterfeit headaches. Stamped "607" but failing load tests. Our traceability includes batch laser etching and full test reports. Procurement directors, test a sample pack first—saves returns.

Why Choose YIDI Motion's 607/629 Bearings

Our versions aren't just compliant—they outperform in the field. Low noise levels under 65dB at 10,000 RPM, thanks to optimized raceway grinding. We use Kluber or Mobil greases for extended life, up to 20,000 hours L10 at moderate loads.

Customization hits OEM sweet spots. Want stainless AISI440C for corrosive apps? Or polyamide cages for lightweight? We handle it in-house. Bulk buyers get tiered pricing: 1k units at $0.80, 10k at $0.60 for 607 ZZ.

Operational edge: These bearings integrate seamlessly with our ball screws and linear guides. One U.S. client retrofitted actuators, dropping friction losses by noticeable margins. No hype—just measurable quietness and uptime.

High-speed stability: Up to 36,000 RPM for 629.
Load handling: Static Cr up to 5.4kN.
Versatile sealing: Rubber or metal shields.
Cost-effective scaling: No premium for volume.

Short story: A Texas distributor switched after competitors bailed on COVID shortages. Now they reorder monthly, praising consistent bore sizing.

Technical Specifications: 607 vs 629 Comparison

Parameter	Bearing 607	Bearing 629
Dimensions (ID x OD x Width)	7 x 19 x 6 mm	9 x 26 x 8 mm
Dynamic Load (Cr)	1,940 N	4,550 N
Static Load (Cor)	835 N	2,850 N
Max Speed (Grease)	28,000 RPM	23,000 RPM
Weight	0.0078 kg	0.019 kg
Material	GCr15 Chrome Steel	GCr15 Chrome Steel
Tolerance Class	P0 / ABEC-1	P0 / ABEC-1
Clearance	CN, C2, C3	CN, C2, C3

Note: Custom options available for P6 precision, stainless steel, or extended temp greases (-40°C to 150°C). Full datasheets on request.

Applications Where 607/629 Bearings Shine

In linear motion setups, the 607 slips into small ball spline housings, handling misalignment without chatter. Larger 629 fits stepper motor hubs, enduring 24/7 indexing.

Appliance makers use them in fan rotors—quiet start-up, no grease bleed. Automotive suppliers spec for ECU cooling fans or switchgear. Drones? 607 ZZ versions spin props at 20k RPM without heat buildup.

We've supplied to pump OEMs where axial loads from impellers test limits; C3 clearance prevents seizure. One insight: In humid U.S. Midwest plants, 2RS seals cut contamination claims by half, per client feedback.

Pair with our linear guides for XY tables—friction drops, positioning accuracy holds microns. Procurement note: Always match cage type to speed; pressed steel for standard, nylon for ultra-high RPM.

Installation and Maintenance Realities

Press-fit these with an arbor tool—never hammer directly. Heat shafts to 80°C for slip-in on tight H6 fits. Align races parallel; misalignment over 0.01mm invites edge loading.

Lube sparingly post-install if open. For 2RS, no touch-up needed. Monitor vib with a meter—peaks over 5mm/s signal issues. Relube interval? 2,000 hours typical, less in dirty shops.

Warning: Over-torquing end caps cracks shields. We've seen it chew through warranty batches. Pro tip: Use soft jaws in lathes for fixturing.

YIDI Motion Factory: Our Production Edge

Established 2020, Hebei YIDI Import & Export Trading Co., Ltd. runs a 100-person team, 30% senior techs. German grinders and Japanese heat-treat lines ensure micron-level consistency.

Angular Contact Ball Bearing Supplier

Certifications: ISO 9001:2015, RoHS compliant, REACH registered. Export to 50+ countries—USA top market. OEM/ODM full service: From CAD to packed pallets.

Address: 16-1-1601 Aobeigongyuan, Chang'an District, Shijiazhuang City, Hebei Province, China. Phone: +86 18134111662. Email: adam@yidimotion.com.

"By Adam Zhang, Export Director – 15 years in bearing supply chain."

Logistics and Shipping to USA Buyers

Ex-works Shijiazhuang, DHL for samples (3-5 days), sea for bulk (25-35 days to West Coast). 20ft holds 500k 607s. FOB Qingdao, CIF options.

bearing 6201 bearing 6309 61909 bearing

Duties? HS 8482.10, check your importer. We handle docs: CO, packing list, fumigation cert. Partial shipments OK for trials.

What Buyers Are Saying

Mike R., Procurement Manager, Texas Automation Firm: "Switched to YIDI 629 2RS after local stockouts. Perfect fit in our actuators, no DOA. Lead time beat quotes by 10 days."

Sarah L., Ops Director, California Distributor: "607 ZZ samples arrived greased right, ran 25k RPM test flawless. MOQ flexible, pricing fair for 5k lot."

Tom K., Engineer, Midwest Machinery OEM: "Custom C3 on 629s solved thermal bind. Factory tour confirmed quality—real pros."

David P., Supply Chain Lead, Florida Importer: "Full container of mixed 607/629, zero damage. Traceability beats competitors."