What is the lead time for production?

The average lead time is one month, ranging from 1 to 3 months depending on the season.

What material is used for these bearings?

They are manufactured from high-quality high carbon chromium bearing steel (GCr15).

What is the load direction for this bearing?

The bearings are primarily designed to handle radial loads.

Sealed Nnu4928K Double Row Cylindrical Roller Bearing

Name: Sealed Nnu4928K Double Row Cylindrical Roller Bearing
Brand: Luoyang Rock Precision Engineering Co., Ltd.
SKU: 2154740782

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

Model NO.

NNU Series

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.

Heavy Load Capacity: Double row cylindrical rollers provide exceptional radial load capacity and rigidity.

Separable Design: Separable structure allows for easy mounting, maintenance, and assembly.

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 compensate for thermal expansion.

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

Flexible Bore Options: Available with tapered bore (K type) for secure interference fit installation.

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

Company profile

High Repeat Buyers ChoiceIn-stock CapacityFast DeliveryCustomization from Samples

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: ≤1.72h

AI-Powered supplier vetting

SummaryLuoyang Rock Precision Engineering Co., Ltd. is a China-based limited company established in 2022 with 19 employees. Its stated product scope includes bearings, machine tools, robots, and port machinery, and its products are reportedly used in construction machinery, mining equipment, CNC machine tools, wind power, robotics, and heavy industry. The supplier reports flexible customization and OEM service for well-known brands, but no SDK availability. Manufacturing resources include one production line and two export-trade staff, with one experienced export employee. Service-control weaknesses are documented: no written procedures or records for supplier-service assessment, corrective and preventive actions, or complaint handling. Finished products are checked by packing staff, and continuous quantity reconciliation is not performed for each batch. Overseas warehouse, showroom, agent/branch, and offline trade-show capabilities are absent. Certification holdings, verified customer cases, and sufficient...

After-Sales capabilityFinished products are checked by packing staff, but the supplier has no written procedures or records for effective service-capability assessment, corrective and preventive actions, or customer-complaint handling. It also has no overseas warehouse, showroom, agent or branch, and has not participated in offline trade shows, indicating limited documented and overseas service infrastructure.

R&D capabilityThe company describes 20 years of continuous innovation and modern precision technology, and its products are used in technically demanding sectors including CNC machine tools, wind power, robotics, and heavy industry. However, it explicitly reports no available SDK, so software-development integration capability is not demonstrated.

Production capacityThe supplier reports one manufacturing production line and one year of export experience, supported by two export-trade staff and one experienced export employee. It does not perform continuous quantity reconciliation for every batch or mass-production run, which is a stated production-control weakness.

Customization capabilityThe supplier explicitly reports customization from samples, designs, full customization, minor customization, and flexible customization. It also states that it provides OEM services for well-known brands, supporting a positive assessment of customization capability.

Product Q&A

Q:What are the main applications for NNU Series bearings?

They are ideal for machine tool spindles (CNC lathes, machining centers), rolling mills, heavy industrial machinery, wind turbine main shafts, mining equipment, and high-speed electric motors.

Q:What precision grades are available?

High precision grades P4 and P5 are available to meet demanding requirements for rotational accuracy.

Q:Can the bearings be customized?

Yes, OEM and ODM services are available. Customization options include samples, designs, full customization, minor customization, and flexible customization.

Q:What is the minimum order quantity?

The minimum order quantity is 1 set.

Q:What are the payment terms?

Payment can be made via LC, T/T, D/P, PayPal, Western Union, or small-amount payment.