Cylindrical Roller Bearing
NACHI 6304 Deep Groove Ball Bearing for Bicycle Parts
ISO 9001 TS 16949
Genuine SKF
50+ Countries
24h Response

-- SKF Authorized Engineering Partner

NACHI 6304 Deep Groove Ball Bearing for Bicycle Parts

Keep your bicycle running smoothly and quietly with the reliable NACHI 6304 Bearing, designed to reduce friction and extend the life of your bike parts. Crafted from high-quality Bearing Steel, this deep groove ball bearing ensures consistent performance even during long rides, addressing common issues with wear and tear.

  • Precision rating options (P0-P2) allow for tailored fit in various bicycle applications
  • Single row design delivers optimal radial load support for smooth rotation
  • Open seals type facilitates easy maintenance and lubrication with oil, grease, or dry conditions

Technical Specifications
Product Name
NACHI 6304 Deep Groove Ball Bearing for Bicycle Parts
Category
Cylindrical Roller Bearing
Quality Standard
ISO 9001 / TS 16949
Lead Time
8-12 Weeks Custom
Minimum Order
Negotiable

15+ Certified Engineers On-Call

Free application analysis · Failure diagnosis · Custom modification guidance. Response within 24 hours.

Product Specifications

Parameter Details
Model Number Nj2307 Nj2307m
Bearing Type Cylindrical Roller Bearing
Outer Dimension 35mm-400mm
Specification 35*80*31mm
Material Bearing Steel
Spherical Non-Aligning Bearings
Load Direction Radial Bearing
Separated Separated
Structure Cylindrical
Seals Type Open
Lubricate Oil Grease Dry
Precision Rating P0 P6 P5 P4 P2
Number of Row Single Row
Trademark NSK
Origin Japan
HS Code 8482500090

Application Suitability

Industry Typical Applications
Automotive Bicycle Parts

Struggling with Bearing Selection for Bicycle Components? The NACHI 6304 Deep Groove Ball Bearing Delivers Reliability

Finding the right bearing for bicycle parts often means sifting through countless models, worrying about dimensional compatibility, or dealing with early wear from low-quality materials. When a bearing fails, it doesn’t just stop your bike—it disrupts your entire day. Whether you’re a manufacturer or a repair shop, the challenge lies in balancing performance, availability, and cost without compromising on quality.

Engineered for Consistent Performance in Bicycle Applications

The NACHI 6304 Deep Groove Ball Bearing addresses these pain points by combining precision engineering with versatile design. As part of our comprehensive bearing solutions, this model aligns with ISO 9001 standards, ensuring reliable production and inspection processes. With access to a wide range of brands—including NACHI, NSK, SKF, and more—we simplify sourcing, whether you need standard parts or hard-to-find replacements for bicycle components like hubs, bottom brackets, or gear systems.

Optimal Performance in Radial Load Environments

Designed as a radial bearing, the NACHI 6304 excels in applications where loads act perpendicular to the shaft, such as bicycle wheel hubs. Its single-row structure and open seal type make it suitable for environments where regular lubrication is manageable, while the bearing steel construction provides the durability needed to withstand the repetitive stresses of cycling. Whether used in road bikes, mountain bikes, or commuter models, this bearing maintains stable operation under varying speeds and load conditions.

Key Engineering Features That Impact Bicycle Performance

The 35mm bore diameter, 80mm outer diameter, and 31mm width (35*80*31mm) ensure compatibility with common bicycle component specifications, making it easy to integrate into existing assemblies. The precision rating options—from P0 to P2—allow you to choose the right balance between cost and accuracy: P0 for general use, P5 or P4 for higher precision applications where minimal vibration is critical. The separated design also simplifies maintenance, allowing for easy disassembly and re-lubrication, which is essential for extending bearing life in bicycle parts exposed to dust, moisture, and varying temperatures.

Why Choosing the Right Bearing Reduces Long-Term Costs

Opting for a quality bearing like the NACHI 6304 minimizes the hidden costs of frequent replacements and downtime. Low-quality bearings often fail prematurely due to subpar material hardness or imprecise dimensions, leading to bike repairs, customer complaints, and lost productivity. By contrast, this bearing’s robust construction and adherence to international standards ensure longer service life, reducing the total cost of ownership. When selecting a bearing, consider not just the upfront price, but the reliability and performance that prevent costly disruptions.

Quality You Can Trust in Every Bearing

Our commitment to quality starts with rigorous原材料检验 and成品 testing, including checks for dimensions, hardness, and surface treatment. All bearings are produced under ISO 9001-certified processes, ensuring consistency and reliability. We stand behind our products with a质保期, covering manufacturing defects for added peace of mind. With extensive现货库存 and support for OEM/ODM定制, we can meet both small and large order requirements, delivering the right parts when you need them.

Packaging & Shipping

  • Packaged in cartons and pallets for secure transportation
  • 现货库存 available for quick dispatch
  • Flexible shipping options including express, air, and sea freight
  • Low minimum order quantity to support small-scale repairs and large production runs

Get a Quote for the NACHI 6304 Bearing Today

Whether you need the NACHI 6304 for bicycle parts or other applications, we’re ready to assist. Provide your required quantity, delivery location, and any specific brand or model preferences, and our team will promptly share pricing and availability. With access to a full range of bearings—from deep groove ball bearings to cylindrical roller bearings—we’re your single source for reliable bearing solutions.

Frequently Asked Questions

Q: Do you support procurement of other bearing brands or models?

A: Yes, we offer a full range of bearings across international brands (including SKF, NSK, NTN, Koyo, NACHI, IKO, FAG, Timken) and domestic brands. We can source bearings according to your specified brand, model, or dimensions.

Q: How can I confirm if this bearing fits my bicycle components?

A: Provide the required dimensions (bore diameter, outer diameter, width) or the original model number, and our technical team will verify compatibility with your application.

Q: What is your warranty policy for bearings?

A: We provide a质保期 for all bearings, covering manufacturing defects. Specific terms are outlined in the sales contract, and defective products can be replaced or returned within the warranty period.

Q: What is the minimum order quantity for this bearing?

A: We support low minimum order quantities, making it suitable for both small-scale repairs and large production orders. Contact us for details based on your specific needs.

Q: How long does shipping take, and what logistics options are available?

A: For in-stock items, we ship within 1-3 business days. We offer express delivery (for urgent orders), air freight, and sea freight, with transit times varying by destination.

Q: Can you provide OEM or ODM customization for bearings?

A: Yes, we support OEM/ODM services, including custom dimensions, materials, and packaging, based on your technical drawings or specifications.

Ready to order or need a quote?
Send the bearing model, dimensions (d x D x B), and quantity — we’ll get back to you with pricing and lead time.
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01

Authorized SKF Engineering Partner

Official partner since 1998 with direct access to SKF technical resources, genuine products, and engineering expertise.

02

15+ Certified Engineers On-Staff

In-house team provides application design, failure analysis, and predictive maintenance -- reducing bearing failures by 35%.

03

ISO 9001 & TS 16949 Certified QC

Every product undergoes rigorous pre-shipment inspection with full documentation for traceability and compliance.

04

Global Logistics to 50+ Countries

Dedicated account managers and reliable delivery networks ensure on-time supply for enterprise clients worldwide.

Performance Metrics

35%

Failures Prevented

70%

Downtime Reduction

25+

Years Experience

24h

Quote Response

78% of large enterprises prefer suppliers offering integrated technical support and lifecycle services.

Application Design

Engineering

Custom bearing selection and system design based on your specific load conditions, speeds, temperatures, and environmental factors.

Failure Analysis

Diagnostics

Root-cause investigation of bearing failures using metallurgical testing, vibration analysis, and operating data review.

Predictive Maintenance

IIoT

IIoT-enabled monitoring with smart sensor bearings for real-time vibration, temperature, and RPM tracking.

Custom Modification

Custom

Modified bearings with special coatings, seals, tolerances, or materials. Lead time 8-12 weeks from official channels.

On-Site Installation

Support

Certified engineers available for on-site installation support, alignment checks, and commissioning assistance worldwide.

Lifecycle Support

Lifecycle

Long-term service agreements including regular maintenance checks, replacement scheduling, and performance reporting.

Free samples available for orders over $50K

Validated against your KPIs before full production commitment.

Contact Engineering Team

-- Get In Touch

Request a Technical Consultation & Quote

Our certified engineers will review your application requirements and provide a detailed quote within 24 hours.

Address

No. 377 Bansongyuan Road, Huangpu District, Shanghai, China

Free Sample Program

Orders over $50K qualify for free product samples

Test against your KPIs before full production commitment. Ask our engineers for details.

Product Inquiry Form

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ISO 9001 · TS 16949 · Authorized SKF Partner · Since 1998

SKF Authorized Engineering Partner

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