Do you provide inspection certificates with shipments?

Yes, every shipment can include a Certificate of Conformity (COC) confirming the precision grade and specification. For an extra fee, we can provide detailed dimensional inspection reports and material test certificates (EN 10204 3.1/3.2) from the steel mill.

Nn3014 Nn Series Cylindrical Roller Bearing for Textile Machinery

Name: Nn3014 Nn Series Cylindrical Roller Bearing for Textile Machinery
Brand: Luoyang Rock Precision Engineering Co., Ltd.
SKU: 2151890502

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

Super Precision Grades P2/P4/P5: ISO 492 compliant with tight tolerances for ultra-precision grinding and aerospace applications.

High Radial Load Capacity: Double-row design shares radial load, offering significantly higher rating in same mounting space.

High Rigidity & Accuracy: Low cross-section and full roller set ensure minimal deflection and stiff spindle performance.

Separable Design: Inner and outer rings mount independently, simplifying installation for interference fits.

High-Speed Capability: Optimized roller guidance and cage design allow high limiting speeds with grease or oil-air.

Customizable Options: Available with tapered bore (K), oil groove (W33), heat stabilization (S1-S3), and custom cages.

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

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: ≤2.28h

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 the inner ring ribs, which is preferred for machine tool spindles due to better guidance at high speeds. NNU bearings have rollers guided by the outer ring ribs, used when the outer ring rotates or the inner ring needs frequent removal.

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

Yes, P2 grade is available for most NN30 and NN49 sizes. It requires extra grinding and super-finishing, so the lead time is usually 25-45 working days. We recommend contacting us early to check availability and schedule.

Q:Do you offer OEM or private labeling services?

Yes, we provide OEM services including laser marking your brand name, logo, and part number on the bearing, as well as custom packaging. All OEM work is covered by a confidentiality agreement to protect your information.

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

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

Q:What lubrication do you recommend for high-speed spindles?

For maximum speed, oil-air or oil-mist lubrication is best as it delivers precise oil to the contact zone. For moderate speeds, high-speed spindle grease (lithium complex or polyurea thickened synthetic oil) works well. Bearings with the W33 option are designed for oil-air/mist lubrication.