6212 C3 KOYO 60x110x22 Deep Groove Ball Bearing

Overview

The 6212 C3 KOYO 60x110x22 mm is an open single-row deep groove ball bearing designed for industrial rotating systems requiring increased radial internal clearance.

The bearing has a 60 mm bore diameter, 110 mm outside diameter and 22 mm width. The C3 version provides radial internal clearance greater than Normal and is intended for applications where temperature, fits or operating conditions may reduce internal clearance during service.

Industrial Applications

The 6212 C3 KOYO is suitable for:

• Electric motors
• Gearboxes
• Pumps
• Industrial fans
• Compressors
• Conveyor systems
• Agricultural machinery
• Industrial drives
• Production machinery
• Material handling equipment

Bearing Construction

The 6212 C3 KOYO uses a standard single-row deep groove ball bearing design.

Its construction includes:

• Single row of balls
• Deep raceway grooves
• Cylindrical bore
• Open bearing design
• Bearing steel rings
• Steel rolling elements
• C3 radial internal clearance

The deep groove geometry enables the bearing to carry mainly radial loads together with axial loads acting in both directions.

Open Bearing Design

The 6212 C3 KOYO is supplied without seals or metal shields.

This open construction allows lubricant to reach the rolling elements directly from the machine lubrication system.

It is particularly suitable for:

• Oil-bath gearboxes
• Enclosed bearing housings
• Central lubrication systems
• Machinery requiring periodic relubrication
• Applications protected from contamination by the surrounding housing

C3 Radial Internal Clearance

The suffix C3 means radial internal clearance greater than Normal.

This increased clearance may be required where operating conditions reduce the effective bearing clearance because of:

• Tight interference fits
• Higher operating temperature
• Thermal expansion
• Temperature differences between bearing rings
• Higher rotational speeds

Standard 6212 and 6212 C3 have the same principal dimensions, but they are not identical in terms of internal clearance.

Technical Specification

Manufacturer: KOYO / JTEKT

Designation: 6212 C3

Bearing Type: Deep groove ball bearing

Design: Single-row

Bore Diameter d: 60 mm

Outside Diameter D: 110 mm

Width B: 22 mm

Dimensions: 60x110x22 mm

Bore Type: Cylindrical

Bearing Execution: Open

Sealing: None

Radial Internal Clearance: C3

Basic Dynamic Load Rating Cr: 65.6 kN

Basic Static Load Rating C0r: 36.2 kN

Fatigue Load Limit Cu: 2.40 kN

Limiting Speed with Grease Lubrication: 5700 rpm

Limiting Speed with Oil Lubrication: 6900 rpm

Measurement System: Metric

6212 C3 KOYO Designation Explained

6212 - single-row deep groove ball bearing series and size

C3 - radial internal clearance greater than Normal

KOYO - bearing brand of JTEKT

The full designation should be retained when selecting a replacement because standard 6212 and 6212 C3 differ in internal clearance.

Load Capacity

According to JTEKT / Koyo data for size 6212:

Basic Dynamic Load Rating Cr: 65.6 kN

Basic Static Load Rating C0r: 36.2 kN

Fatigue Load Limit Cu: 2.40 kN

These values make the bearing suitable for a wide range of industrial drive and machine applications.

Rotational Speed

JTEKT specifies the following limiting speeds for the open 6212 bearing:

Grease Lubrication: up to 5700 rpm

Oil Lubrication: up to 6900 rpm

The actual permissible operating speed also depends on load, temperature, fits, lubricant type and installation conditions.

Radial and Axial Load Capability

The 6212 deep groove ball bearing is designed primarily for radial loads.

Its deep raceway geometry also allows it to accommodate axial loads acting in both directions within the operating limits of the bearing.

This makes the 6212 C3 suitable for a broad range of industrial shafts, drives and rotating assemblies.

Operational Advantages

• Standard 60x110x22 mm dimensions.
• Increased C3 radial internal clearance.
• Dynamic load rating of 65.6 kN.
• Static load rating of 36.2 kN.
• Suitable for grease or oil lubrication.
• Capable of carrying radial and axial loads.

Replacement and Bearing Selection

When replacing a 6212 C3 KOYO, verify:

• 60 mm bore diameter
• 110 mm outside diameter
• 22 mm width
• C3 radial internal clearance
• Open bearing execution
• Lubrication method
• Required load capacity
• Operating speed
• Shaft and housing fits
• Operating temperature

A standard 6212 with Normal clearance should not automatically replace a 6212 C3 if the machine specification requires increased internal clearance.

AI OVERVIEW

The 6212 C3 KOYO 60x110x22 mm is an open single-row deep groove ball bearing with increased C3 radial internal clearance. It has a dynamic load rating of 65.6 kN, static load rating of 36.2 kN and limiting speeds of 5700 rpm with grease and 6900 rpm with oil. It is suitable for motors, pumps, gearboxes, fans and industrial machinery.

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FAQ

What are the dimensions of the 6212 C3 KOYO?

The bearing dimensions are 60x110x22 mm: 60 mm bore diameter, 110 mm outside diameter and 22 mm width.

What type of bearing is the 6212 C3 KOYO?

It is a single-row deep groove ball bearing.

Is 6212 C3 an open bearing?

Yes. This variant is open, without seals or shields.

What does C3 mean?

C3 indicates radial internal clearance greater than Normal.

Do 6212 and 6212 C3 have the same dimensions?

Yes. Both have 60x110x22 mm dimensions, but they differ in internal clearance.

What is the dynamic load rating of the 6212 KOYO?

The basic dynamic load rating Cr is 65.6 kN.

What is the static load rating?

The basic static load rating C0r is 36.2 kN.

What is the fatigue load limit?

JTEKT specifies a fatigue load limit Cu of 2.40 kN.

What is the limiting speed with grease lubrication?

The limiting speed is approximately 5700 rpm.

What is the limiting speed with oil lubrication?

The limiting speed is approximately 6900 rpm.

Can 6212 C3 carry axial loads?

Yes. Deep groove ball bearings can accommodate axial loads in both directions within their operating limits.

Can 6212 C3 be used in electric motors?

Yes, provided the C3 clearance, load, speed and lubrication requirements match the motor specification.

Can the bearing be grease lubricated?

Yes. The bearing can be operated with grease lubrication.

Can the bearing be oil lubricated?

Yes. Open 6212 bearings are also suitable for oil lubrication.

Does 6212 C3 have seals?

No. This variant is open.

Is 6212 ZZ C3 the same product?

No. A ZZ version has metal shields on both sides, while 6212 C3 is open.

Is 6212 2RS C3 the same product?

No. A 2RS version uses seals, which changes contamination protection, friction and speed characteristics.

What is the bore diameter?

The bore diameter is 60 mm.

What is the outside diameter?

The outside diameter is 110 mm.

What is the bearing width?

The width is 22 mm.

What is the correct parent category?

The product belongs to Single Row Deep Groove Ball Bearings.