Bearings with C3 and C4 Clearance – High Precision Solutions for Industrial Applications

Bearings with increased internal clearance, such as C3 and C4, are essential for demanding industrial environments where heat, speed and heavy loads create expansion inside the bearing. Choosing the correct internal clearance ensures stability, long service life and trouble-free operation of machinery across all sectors.

What Is C3 and C4 Internal Clearance?

C3 clearance means the bearing has slightly more internal space than standard (CN). It is used when the bearing operates at higher temperatures or speeds, where natural thermal expansion reduces internal play.

C4 clearance offers even more internal space than C3. It is used for extremely high temperatures, heavy loads or specific high-speed industrial machines where expansion is significant.

Why Internal Clearance Matters

• Prevents overheating during high-speed operation
• Ensures correct lubrication film formation
• Compensates for thermal expansion of rings and rolling elements
• Improves bearing lifetime under heavy loads
• Reduces vibration and prevents premature wear

Where C3 and C4 Bearings Are Used

These bearings are widely used in industries where machinery runs continuously or under extreme conditions:

• Electric motors and generators
• Pumps, compressors and ventilators
• Industrial gearboxes
• Steel production and metal processing
• Mining and heavy-duty equipment
• High-speed machine tools
• Agricultural and construction machinery

Available Types with C3 and C4 Clearance

The increased internal clearance can be supplied across a wide range of bearing types:

• Deep groove ball bearings
• Spherical roller bearings
• Tapered roller bearings
• Cylindrical roller bearings
• Needle roller bearings
• Hybrid and precision spindle bearings

Benefits for Your Machinery

By selecting bearings with C3 or C4 clearance, you ensure a stable and reliable setup even under tough operating conditions. These bearings provide excellent performance at elevated temperatures, high speeds and under increased mechanical stress.

Worldwide Supply and Fast Delivery

We supply C3 and C4 clearance bearings from leading global manufacturers and specialise in sourcing hard-to-find types. Whether you need a single bearing or a full industrial order, we can deliver anywhere in the world.

Request Your Quotation

If you require bearings with C3 or C4 clearance, send us your list of part numbers or specifications. We will source the exact types you need and provide a competitive quotation along with delivery terms.