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 - Image 2
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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 Ideal for industrial machinery, automotive systems, and heavy-duty equipment. Features precision engineering, durable bearing steel construction, and optimised roller design. Features precision engineering, durable bearing steel construction, and optimised 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 (optimised internal design), EM (brass cage)
  • Heat Treatment. Carburised steel for enhanced durability

[2] Cylindrical roller bearings (bearings with cylindrical rollers and raceways in line contact) - wikipedia
[7] NJ308 Bearing_Cylindrical Roller Bearings-Hua Shaft Website
[9] NF308 bearing_NTN bearing NF308 size specification parameters offer-NTN bearing type enquiry

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 optimised 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
  • Customisation 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 technology and strict quality control, our diverse bearings serve industries like manufacturing and automotive. With advanced technology 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.

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

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

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Cooperate with 500+ suppliers for stable raw material supply.

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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.
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