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NTN Radial Ball Bearing: 6311, Open, 55 mm Bore, 120 mm OD, 29 mm Wd, Alloy Steel Ring - Ceramic Insulated Radial Ball Bearings
NTNCeramic Insulated Radial Ball Bearings

NTN Radial Ball Bearing: 6311, Open, 55 mm Bore, 120 mm OD, 29 mm Wd, Alloy Steel Ring

The NTN Radial Ball Bearing: 6311 is a ceramic insulated radial ball bearing with a metric system of measurement. It features a 55 mm bore, 120 mm OD, and 29 mm width, with an alloy steel ring and Class 0 tolerance…

SKU 3G-OTH-100948

Brand
NTN
Item
Radial Ball Bearing: 6311, Open, 55 mm Bore, 120 mm OD, 29 mm Wd, Alloy Steel Ring
Category
Ceramic Insulated Radial Ball Bearings
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Technical Specifications

NTN
Manufacturer Part Number
7MC3-6311C3
Type
Open, Alloy Steel Ring, Class 0
Bore
55 mm
OD
120 mm
Wd
29 mm
System of Measurement
Metric
Bearing Industry Number
6311
View Full Spec Sheet

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NTN Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The NTN Radial Ball Bearing: 6311 is a ceramic insulated radial ball bearing with a metric system of measurement. It features a 55 mm bore, 120 mm OD, and 29 mm width, with an alloy steel ring and Class 0 tolerance. The bearing industry number is 6311, and the manufacturer part number is 7MC3-6311C3.

Frequently Asked Questions

What is the NTN 6311 ceramic insulated radial ball bearing used for?

The NTN 6311 ceramic insulated radial ball bearing is used in electric motors and generators to prevent electrical pitting damage. Its ceramic coating blocks stray currents, extending equipment life in industrial applications like pumps, compressors, and conveyors.

What are the specifications of the NTN 6311 bearing?

The NTN 6311 bearing has a 55 mm bore, 120 mm OD, and 29 mm width. It is an open type with an alloy steel ring, Class 0 tolerance, and metric system of measurement. The bearing industry number is 6311, and the manufacturer part number is 7MC3-6311C3.

Where to buy the NTN 6311 bearing worldwide?

3G Electric supplies the NTN 6311 bearing worldwide. As a global industrial solutions provider, we handle full logistics and customs clearance to deliver this ceramic insulated radial ball bearing to your facility. Contact us for availability and lead time.

How to install the NTN 6311 ceramic insulated bearing?

Install the NTN 6311 bearing using a press fit on the shaft and housing, ensuring clean, dry surfaces. Avoid hammering directly on the bearing. Use proper alignment tools and apply grease compatible with ceramic coatings. Follow NTN's generic installation guidelines for best results.

Used in

Common applications for NTN
Automotive driveline — NTN tapered roller bearing assemblies (e.g., 4T-30303) for differential and wheel hub applications
Conveyor systems — NTN 4-bolt flange bearings (e.g., UCF211-200D1) for idler rollers and take-up units
Machine tool spindles — NTN duplex angular contact bearings (e.g., ML7006CVDUJ74S) for high-speed precision rotation
Industrial fans — NTN high-temperature radial ball bearings (e.g., 6004FT150) for oven and dryer exhaust systems
Pump drives — NTN radial ball bearings (e.g., 6008LLBC3/L627) for electric motor and pump shaft support
Agricultural equipment — NTN tapered roller bearing cones (e.g., LM29748L) for gearbox and PTO shaft assemblies

NTN Products

3G Electric supplies NTN ceramic insulated radial ball bearings. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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