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TS 16949
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Needle Bearing
LB4UU LB5UU LB6UU LB8SUU LB8UU Needle Roller Bearings – High Precision, Low Friction
Basic Info.
| Inner Diameter | — |
|---|---|
| Outer Diameter | — |
| Thickness | — |
| Type | Needle Roller Bearing, Closed |
| Load Direction | |
| Material |
Introduction
LB4UU is a high-precision needle roller bearing without inner or outer rings, designed for radial loads. Made of premium bearing steel, it supports grease or oil lubrication and offers precision grades P0–P2 and clearances C0–C4. Ideal for compact, high-load applications with OEM/ODM support.7
Day Prototype
vs. 8-12 wks standard
50+
Countries Served
Global logistics network
12h
Quote Response
Expert engineers on call
Typical Applications
Wind Power
Mining
Steel & Metallurgy
Automotive / EV
Rail Transit
Precision Machinery
Genuine SKF Bearings
NDA Protected
Free Sample for Orders > $50K
Global Shipping
Product Details
Key Specifications & Advantages of LB Series Needle Roller Bearings
| Description | Core Value |
|---|---|
| Ultra-compact design (no inner/outer ring) | Maximizes space efficiency in tight assemblies like automotive transmissions & robotics |
| Radial load-only, high-load capacity | Supports heavy radial forces with minimal deflection — ideal for oscillating joints |
| Bearing steel construction (GCr15 equivalent) | Ensures hardness ≥60 HRC and fatigue resistance per ISO 683-17 |
| Closed-type sealed design | Prevents contamination & retains grease — extends service life by 2–3× vs. open types |
| P0–P2 precision grades available | Meets SKF ABEC-1 to ABEC-9 tolerances — perfect for OEM precision motion systems |
| C0/C3/C4 clearance options | Enables thermal expansion compensation in high-speed or temperature-variable environments |
| Lubricated with high-temp grease or oil-ready | Operates continuously at –30°C to +120°C without relubrication (grease-filled) |
| HS Code 8482102000 — globally compliant | Seamless customs clearance; certified for EU CE, RoHS, and China GB/T standards |
| OEM/ODM support & 1M/month capacity | Fast prototyping, custom packaging, and traceable batch production — backed by 10-year BDL quality warranty |
| Competitive edge vs. generic brands | Lower noise (≤28 dB), tighter raceway roundness (≤0.8 μm), and 15% higher dynamic load rating than standard LB series |
FAQ: Are LB4UU–LB8UU compatible with SKF NK/NKS housings? Yes — identical outer diameter and needle profile. Can they replace INA HK bearings? Confirmed cross-reference for LB5UU/LB6UU. What’s the max rotational speed? Up to 6,000 rpm (grease-lubricated, light load). Is corrosion resistance available? Optional black oxide or Zn-Ni plating on request.
Product Summary
- Product Name
- LB4UU LB5UU LB6UU LB8SUU LB8UU Needle Roller Bearings – High Precision, Low Friction
- Category
- Needle Bearing
- Brand
- SKF
- Certification
- ISO 9001 · TS 16949
- Lead Time
- 7 Working Days
Get a Custom Quote
Our engineers will respond within 12 hours with a tailored solution.
Request QuoteGeneral Specifications
| Bearing Type | Needle Bearing |
| Brand | SKF |
| Quality Standard | ISO 9001 / TS 16949 |
| Precision Grade | P0 / P5 / P6 (custom) |
| Material | Chrome Steel / Stainless |
| Cage Material | Steel / Brass / Polyamide |
| Lubrication | Grease / Oil (specify) |
| Operating Temp. | -40°C to +200°C |
| Min. Order Qty | 1 pc (samples available) |
| Prototype Lead Time | 7 Working Days |
Performance Parameters
| Load Capacity | Contact for C0/Cr values |
| Speed Rating | Contact for ndm limit |
| Vibration Level | Z1 / Z2 / Z3 (custom) |
| Noise Level | V1 / V2 / V3 (custom) |
| Fatigue Life | L10h per ISO 281 |
| Sealing Options | Open / Z / 2Z / RS / 2RS |
Custom Specifications Available
Our engineering team can modify bearing dimensions, materials, seals, and clearances to meet your specific operating requirements. Submit your drawing or spec sheet for a tailored proposal.
Wind Power
Main shaft bearings, gearbox bearings, and generator bearings for onshore and offshore wind turbines.
Mining & Quarrying
Heavy-duty bearings for crushers, conveyors, and rotary equipment in extreme dust and shock-load environments.
Steel & Metallurgy
High-temperature bearings for rolling mills, continuous casting, and furnace applications.
Automotive / EV
Wheel hub bearings, transmission bearings, and e-motor bearings for passenger and commercial vehicles.
Rail Transit
Axle box bearings, traction motor bearings, and gearbox bearings meeting EN/UIC railway standards.
Precision Machinery
High-precision spindle bearings, angular contact bearings, and super-precision bearings for CNC and robotics.
Application Design
EngineeringOur engineers analyze your operating conditions -- load, speed, temperature, environment -- and select or design the optimal bearing solution to maximize service life and reduce total cost of ownership.
Custom Modification
7-Day TurnaroundNeed non-standard dimensions, special materials, or modified clearances? We can modify standard SKF bearings or manufacture fully custom solutions with a 7-day prototype turnaround.
Failure Analysis
DiagnosticsWhen bearings fail prematurely, our team conducts root-cause analysis using advanced diagnostic tools to identify the failure mode and recommend corrective action.
Predictive Maintenance
Up to 40% Less DowntimeWe deploy vibration monitoring, thermal imaging, and oil analysis programs that detect bearing deterioration early -- reducing unplanned downtime by up to 40%.
On-site Installation
Global CoverageProper installation is critical to bearing performance. Our certified technicians provide on-site installation support, alignment verification, and operator training worldwide.
Lifecycle Support
Enterprise SLAFrom initial selection through end-of-life, our dedicated account managers provide scheduled maintenance plans, re-lubrication programs, and replacement forecasting for enterprise clients.
Why SKF China
The engineering partner advantage
7 Days
Prototype Lead Time
vs. 8-12 weeks via standard channels
15+
Certified Engineers
SKF-certified, on-call for your project
50+
Countries Delivered
Reliable global logistics network
Request a Quote
Get a custom quote for
LB4UU LB5UU LB6UU LB8SUU LB8UU Needle Roller Bearings – High Precision, Low Friction
NDA protected · Free samples for orders > $50K · Reply within 12 hours
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