Do you provide inspection certificates with shipments?

Yes, every shipment includes a Certificate of Conformity (COC). Detailed dimensional reports and material test certificates (EN 10204 3.1/3.2) are available for an extra fee.

Nn3022K Tapered Inner Ring Double Row Cylindrical Roller Bearing

Name: Nn3022K Tapered Inner Ring Double Row Cylindrical Roller Bearing
Brand: Luoyang Rock Precision Engineering Co., Ltd.
SKU: 2155463912

Henan, ChinaLuoyang Rock Precision Engineering Co., Ltd.

US$35.00

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.

NN 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

Ultra-High Precision Grades: Available in P2, P4, P5 per ISO 492 for machine tool spindles and high-precision equipment.

High Radial Load Capacity: Double-row cylindrical rollers share radial load, offering significantly higher ratings in same space.

Separable Design: Inner and outer rings can be mounted separately, simplifying installation with interference fits.

Tapered Bore Option: Suffix K (1:12 taper) allows precise preload and clearance adjustment using locknuts or sleeves.

Custom Engineering: R&D team designs non-standard bearings, special dimensions, materials, coatings, and clearances.

100% Quality Inspection: Every bearing undergoes 100% dimensional, runout, noise, and vibration checks before shipment.

Full Material Traceability: Laser-marked part numbers and batch codes; records kept for 5 years from raw steel to finished product.

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: ≤1.16h

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 is the difference between NN and NNU bearings?

NN bearings have rollers guided by inner ring ribs, ideal for high-speed spindles. NNU bearings have rollers guided by outer ring ribs, used when the outer ring rotates or inner ring needs frequent removal.

Q:Can you manufacture P2 grade bearings? What is the lead time?

Yes, P2 is available for most NN30 and NN49 sizes. Due to extra grinding and super-finishing, the lead time is typically 25-45 working days.

Q:Do you offer OEM or private labeling services?

Yes, we provide OEM services including laser marking your brand, logo, and part number, along with custom packaging. All work is covered by a confidentiality agreement.

Q:What is the minimum order quantity (MOQ)?

There is no strict MOQ for standard catalog models; you can order 1 piece for testing. For custom or non-standard bearings, MOQ is typically 10-50 pieces depending on size.

Q:What lubrication is recommended for high-speed spindles?

Oil-air or oil-mist lubrication is best for maximum speed. For moderate speeds, high-speed spindle grease works well. Bearings with the W33 option are designed for oil-air/mist lubrication.