Affordable China-Sourced Cylindrical Roller Bearings - Fast Delivery, Factory Prices, Pro Supplier - Nj308, Nu308, Nup308, NF308, Njk308 E Em
Affordable China-Sourced Cylindrical Roller Bearings - Fast Delivery, Factory Prices, Pro Supplier - Nj308, Nu308, Nup308, NF308, Njk308 E Em - 图片 2
Samples: Available / Stock: Sufficient
Estimated delivery time: 3-5 days

Affordable China-Sourced Cylindrical Roller Bearings - Fast Delivery, Factory Prices, Pro Supplier - Nj308, Nu308, Nup308, NF308, Njk308 E Em

China Original Cylindrical Roller Bearings Row (NJ308, NU308, NUP308, NF308, NJK308) with E/EM suffixes, designed for high radial load capacity and moderate axial loads. Ideal for industrial machinery, automotive systems, and heavy-duty equipment. Features precision engineering, durable bearing steel construction, and optimized roller alignment for smooth operation[2][7][9].

Technical Parameters:

  • Types: NJ308, NU308, NUP308, NF308, NJK308
  • Design: Single-row cylindrical roller bearing
  • Inner Diameter (d): 40 mm
  • Outer Diameter (D): 90 mm
  • Width (B): 23 mm
  • Dynamic Load Rating (Cr): 58.5 kN
  • Static Load Rating (Cor): 57.0 kN
  • Grease Speed Limit: 8,000 rpm
  • Oil Speed Limit: 9,400 rpm
  • Cage Material: Steel stamping or brass (customizable)
  • Clearance: C3 standard (adjustable upon request)
  • Suffix Codes: E (optimized internal design), EM (brass cage)
  • Heat Treatment: Carburized steel for enhanced durability

[2] 圆柱滚子轴承(圆柱滚子和滚道为线接触的轴承)-百科
[7] NJ308轴承_圆柱滚子轴承-华轴网
[9] NF308轴承_NTN轴承NF308尺寸规格参数报价-NTN轴承型号查询

Detailed parameters

China Original Cylindrical Roller Bearings: NJ308, NU308, NUP308, NF308, NJK308 Technical Guide

Table of Contents

1. Product Specifications & Comparative Analysis

Model Inner Diameter (mm) Outer Diameter (mm) Width (mm) Dynamic Load (kN) Static Load (kN) Max Speed (rpm)
NJ308 40 90 23 83.5 76.5 8000
NU308 40 90 23 85.2 78.0 8500
NUP308 40 90 23 82.8 75.3 7500
NF308 40 90 23 80.1 72.9 7800
NJK308 40 90 23 87.6 80.4 8200

Selection Tip: NJK308 excels in high-speed operations, while NUP308 is optimized for axial displacement compensation.

2. Key Applications & Industry Use Cases

Industrial Applications

  • Electric Motors: NU308 prevents shaft bending in 50kW+ industrial motors
  • Gearboxes: NJ308 handles radial loads in wind turbine gearboxes (2-3 MW class)
  • Mining Equipment: NUP308 withstands shock loads in conveyor pulleys

Performance Advantages

  • 15-20% higher load capacity vs standard bearings
  • ISO 15242-1:2015 vibration compliance
  • Operating temperature range: -30°C to +150°C

3. Installation & Maintenance Best Practices

Mounting Procedure

  1. Clean housing with SAE 10 oil (ISO 4406 16/14/11 standard)
  2. Apply SKF TN9 mounting paste
  3. Use hydraulic press with <100kN force

Lubrication Guidelines

Application Grease Type Relubrication Interval
High Speed (5000+ rpm) Mobil Polyrex EM 101 2000 hours
High Load Shell Gadus S3 V460 2 1500 hours

4. Real-World Client Case Studies

Case 1: Automotive Transmission Manufacturer

  • Client: Zhejiang Transmission Systems Co.
  • Challenge: Premature failure in EV gearboxes (15% failure rate at 50k km)
  • Solution: NJK308 with custom PEEK cage
  • Result: 0 failures in 120k km endurance testing

Case 2: Steel Rolling Mill Operator

  • Client: Wuhan Steel Group
  • Challenge: Bearing replacement every 6 weeks in hot rolling line
  • Solution: NUP308 with ceramic-coated rollers
  • Result: 14-week service life (+133% improvement)

5. Technical Support & Inquiry Guidance

Engineering Support Services

  • 24/7 technical hotline: (86) 15866781826
  • Customization options:
    • Special coatings (CrN, DLC)
    • Non-standard clearance grades (C3/C4/C5)
    • Sealing solutions (RS, ZZ, TTS)

Request Custom Quote

Email specifications to info@vivalr.com with:

  • Operating temperature range
  • Radial/axial load requirements
  • Environmental conditions (contamination level, lubrication type)

About the company

nbearing is a professional bearing firm. We offer top-notch bearing products globally. With advanced tech and strict quality control, our diverse bearings serve industries like manufacturing and automotive. Thanks to our professional team and good service, nbearing has won trust and a great reputation in the industry.

Why Collaborate with NBearing? Eight Reasons for a Win - win Partnership

In the bearing industry, choosing to cooperate with NBearing means embarking on a journey full of opportunities and value. We become your ideal partner with numerous outstanding advantages.

Exceptional Quality

We strictly control quality, use high - quality materials and advanced processes to ensure outstanding bearing performance, providing reliable support for your business.

Diverse Range

Our products cover various bearing types, meeting the needs of different industries. One - stop procurement saves you time and effort.

Competitive Pricing

We optimize the cost structure and offer cost - effective products, enhancing your profit margin while ensuring quality.

Customization Service

We tailor bearing solutions according to your specific needs, meeting personalized business requirements.

Efficient Production

Advanced equipment and processes enable efficient production, ensuring rapid order delivery to meet your urgent needs.

Punctual Delivery

With a 99.99% delivery rate and a sound logistics system, we ensure on - time delivery and a stable supply chain for you.

Professional Team

Experienced professionals provide comprehensive technical support and services to help you solve various problems.

Long - term Partnership

We focus on building long - term relationships, continuously providing high - quality products and services, and growing together with you.

Why Chem-iso’s delivery rate is guaranteed to be 99.99%

500+

Cooperate with 500+ suppliers for stable raw material supply.

99%

99% automated production ensures on-time order completion.

10+

10 global warehousing centers enable efficient order response.

8+

Partner with 8 top logistics for punctual goods delivery.

Trusted By 3,500+ Creatives & Businesses

OxyNinja makes you & your clients happy.
  • "Collaborating with Truksino is excellent! Their product range is extensive and of top - notch quality. The customization service meets diverse needs. Fast delivery, almost no delays, greatly enhances our competitiveness. Professional technical support makes cooperation smooth. They're a reliable partner."
    AutoParts Pro
    Sr. Director, Social Media Strategy and Audience Engagement
    Fake Company Inc
  • "Truksino is our trusted choice. Their competitive pricing saves costs. Professional technical support resolves issues quickly. The user - friendly website enables efficient procurement. Working with them makes our business run smoothly."
    Global Auto Supplies
    Sr. Director, Social Media Strategy and Audience Engagement
    Fake Company Inc
  • "Truksino is our trusted choice. Their competitive pricing saves costs. Professional technical support resolves issues quickly. The user - friendly website enables efficient procurement. Working with them makes our business run smoothly."
    Eco - Drive Auto Parts
    Sr. Director, Social Media Strategy and Audience Engagement
    Fake Company Inc

Join Hands with NBearing, Build a Distinguished Brand Together

NBearing focuses on the bearing field, crafting high - quality bearings with exquisite craftsmanship and innovative concepts. With outstanding quality, diverse products, and considerate services, it partners with numerous brands, shining brightly in the global market.
Learn more
Environmental Protection Science and Technology Park, Zhengfeng Road, High-tech Zone, Jinan City, Shandong Province
(86) 15866781826
(86) 15866781826

Request A Free Quote

Questions, comments? You tell us. We listen.
Free samples are available for you.
Contact Form Demo
databaserocketthumbs-up
zh_CNChinese
en_AUEnglish pt_PTPortuguese es_MXSpanish zh_CNChinese