What are the voltage class options?

The design targets are 1,000 V DC, 2,000 V DC, and 3,000 V DC, subject to confirmation of voltage, resistance, and coating requirements.

Does the insulation coating replace correct grounding?

No, the insulation coating protects against current passage but does not replace correct grounding, shaft-voltage control, or application engineering.

Nu312 C3 Ceramic-Coated Electrically Insulated Motor Bearing

Name: Nu312 C3 Ceramic-Coated Electrically Insulated Motor Bearing
Brand: Luoyang Rock Precision Engineering Co., Ltd.
SKU: 2179852432

Henan, ChinaLuoyang Rock Precision Engineering Co., Ltd.

US$1.00

1 Piece

Sample price:US$10.00/piece.Request sample

Product profile

Customization

Available

Rolling Body

Roller Bearings

The Number of Rows

Single

Model NO.

NU Series

Outer Dimension

Medium and Large(120-190mm)

Material

Bearing Steel with Aluminum Oxide Ceramic Insulati

Spherical

Non-Aligning Bearings

Load Direction

Radial Bearing

Separated

Transport Package

Individual Box + Export Carton + Plywood Case

Specification

Stardard

Trademark

Rock

Origin

Luoyang

HS Code

8413910000

Production Capacity

5000 Pieces/Year

Key features

Electrical Insulation Protection: Ceramic coating blocks shaft currents to prevent pitting, fluting, and premature bearing failure.

Extended Maintenance Intervals: Protects lubricant from degradation and reduces vibration, noise, and unexpected motor shutdowns.

Standard Dimension Compatibility: Retains nominal envelope dimensions of standard NU bearings for easy replacement without modification.

High Voltage Resistance: Offers insulation classes up to 3,000 V DC with plasma-sprayed aluminum-oxide ceramic coating.

Flexible Insulation Options: Available with outer-ring or inner-ring insulation based on specific current path requirements.

Radial Load Capacity: Designed for high radial loads with a non-locating arrangement suitable for free-end positions.

Customization Available: Offers full customization, minor customization, and flexible customization from samples or designs.

Versatile Cage Materials: Options include pressed steel, machined brass, or engineering polymer based on size and application.

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: ≤0.89h

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.

Product Q&A

Q:Does the ceramic coating change the bearing dimensions?

The insulation layer is engineered so the finished bearing retains the nominal envelope dimensions of the corresponding standard NU bearing. Final tolerances must be confirmed for the selected coating and fit.

Q:Should I choose outer-ring or inner-ring insulation?

Outer-ring insulation is commonly selected for housing-side isolation. Inner-ring insulation may be preferred for shaft-side isolation or when lower capacitance is required. The current path and mounting arrangement should be reviewed.

Q:Can an NU bearing carry axial load?

The NU design is primarily a radial, non-locating bearing. It permits axial displacement in both directions and normally requires a separate locating bearing elsewhere in the arrangement.

Q:Can C3 or C4 clearance be supplied?

Yes, subject to model availability and engineering confirmation. Motor temperature, interference fits and operating speed should be considered before selecting clearance.

Q:What information is required for a quotation?

Required details include the NU bearing base model, quantity, insulation position, operating voltage, minimum electrical resistance, radial clearance, cage material, motor speed, radial load, operating temperature, shaft and housing fits, lubrication method, and service environment.