What is the limiting speed for NNU4920?

The limiting speed for NNU4920 is 4000 rpm with grease and 4800 rpm with oil.

Are these bearings suitable for heavy loads?

Yes, they are designed for high radial stiffness and reliability under heavy loads.

High Precision Nnu4920K Double Row Cylindrical Roller Bearing for Machine Tool Spindle

Name: High Precision Nnu4920K Double Row Cylindrical Roller Bearing for Machine Tool Spindle
Brand: Luoyang Rock Precision Engineering Co., Ltd.
SKU: 2158244272

Henan, ChinaLuoyang Rock Precision Engineering Co., Ltd.

US$1.00

1 Piece

Sample price:US$100.00/piece.Request sample

Product profile

Customization

Available

Rolling Body

Cylindrical Rollers

The Number of Rows

Double

Outer Dimension

Multiple Sizes Available

Material

High Carbon Chromium Bearing Steel

Spherical

Non-Aligning Bearings

Load Direction

Primarily Radial Load

Separated

Transport Package

Stardard

Specification

Stardard

Trademark

Rock

Origin

Luoyang

HS Code

8431100000

Production Capacity

5000 Pieces/Year

Key features

High Precision Grades: Available in P4 and P5 precision grades for superior rotational accuracy.

High Radial Load Capacity: Double row cylindrical rollers provide exceptional rigidity and load distribution.

Separable Design: Easy mounting and maintenance with separable inner and outer rings.

High-Speed Performance: Low friction design ensures excellent performance in high-speed spindle applications.

Thermal Expansion Compensation: Non-locating structure allows free axial displacement to handle thermal expansion.

Premium Material: Manufactured from high carbon chromium steel (GCr15) for durability.

Tapered Bore Option: Available with tapered bore (K type) for secure interference fit.

Wide Size Range: Multiple sizes available from small to large bore diameters.

Company profile

High Repeat Buyers Choice

Luoyang Rock Precision Engineering Co., Ltd.

Henan, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 1 year CertifiedNearest Port: Qingdao PortAverage Response Time: ≤2.84h

AI-Powered supplier vetting

SummaryLuoyang Rock Precision Engineering Co., Ltd. is a Chinese supplier established in 2022, specializing in bearings and related machinery. The company offers extensive customization capabilities and has OEM partnerships with well-known brands. Despite these strengths, the supplier lacks formal after-sales service procedures and overseas operational capabilities. With only one production line and limited export trade experience, their manufacturing and export capacities are modest. Financial data shows consistent capacity, but other areas like innovation and certifications remain unexplored.

After-Sales capabilityThe supplier does not have written procedures or records for handling customer complaints or service capability assessments.

Financial creditThe supplier has consistent financial data over the last three years, showing stable financial capacity.

R&D capabilityThe supplier does not have research and development capability with SDK availability.

Customization capabilityThe supplier offers full customization, including from samples and designs, indicating strong flexibility in product customization.