What customization services do you offer?

We offer OEM and ODM services including full customization, minor customization, flexible customization, and customization from samples or designs.

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The minimum order quantity is 1 set. Payment terms include LC, T/T, D/P, PayPal, Western Union, and small-amount payment.

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The average lead time is one month during off-peak season and one to three months during peak season.

6321 C3 High-Reliability Electrically Insulated Deep Groove Bearing for Large Generators

Name: 6321 C3 High-Reliability Electrically Insulated Deep Groove Bearing for Large Generators
Brand: Luoyang Rock Precision Engineering Co., Ltd.
SKU: 1999064871

Henan, ChinaLuoyang Rock Precision Engineering Co., Ltd.

US$1.00

1 Piece

Sample price:US$10.00/piece.Request sample

Product profile

Customization

Available

Transport Package

Wooden

Specification

Standard

Model NO.

6321

Trademark

Rock

Origin

Luoyang

HS Code

8413910000

Production Capacity

5000 Pieces/Year

Key features

Electrical Insulation Barrier: Aluminium-oxide ceramic coating interrupts current path to prevent pitting and premature failure.

Moisture-Resistant Coating: Resin-sealed ceramic coating preserves insulation performance in humid service environments.

ISO Standard Dimensions: Retains nominal boundary dimensions of standard 63 series for easy replacement without redesign.

High Voltage Resistance: Minimum 50 MOhm resistance for 1,000 V DC; options available for 2,000 V and 3,000 V DC.

C3 Clearance Standard: C3 radial internal clearance commonly selected for motor applications to optimize performance.

Dual Insulation Options: Available with outer-ring or inner-ring plasma-sprayed aluminium-oxide ceramic coating.

OEM and ODM Services: Full customization, minor customization, and flexible customization available from samples or designs.

Inspection Reports: Dimensional and insulation test reports can be supplied upon agreement in the quotation.

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: ≤2.04h

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 purpose of the ceramic coating?

The aluminium-oxide ceramic barrier interrupts the current path through the bearing, preventing electrical pitting, raceway fluting, and premature motor failure.

Q:Can these bearings replace standard 63 series bearings?

Yes, they retain the nominal boundary dimensions of the corresponding standard 63 series bearing, enabling replacement without redesigning the shaft or housing.

Q:What insulation options are available?

Options include outer-ring coating or inner-ring coating, with reference voltage classes of 1,000 V DC, 2,000 V DC, or 3,000 V DC subject to confirmation.

Q:Is C3 clearance standard for these bearings?

C3 radial internal clearance is commonly selected for motor applications, though other clearances like CN or C4 are available subject to engineering confirmation.

Q:Does the insulation replace motor grounding?

No, the insulation layer reduces current passage but does not replace correct motor grounding, shaft-voltage control, cable shielding, or application engineering.