As modern equipment becomes smaller, lighter and more intelligent, engineers face an ongoing challenge: how to reduce the size of a machine without sacrificing reliability.

In many compact mechanical systems, the bearing is one of the key components that determines the overall dimensions of the assembly. A conventional bearing may provide sufficient load capacity, but its cross-section often limits how small the equipment can be.

This is where the 6705 bearing offers a clear advantage.

As part of the thin section deep groove ball bearing family, the 6705 is specifically designed for applications where installation space is limited but smooth rotation, precision and long service life are still essential.

Product Overview

The 6705 bearing combines a compact profile with stable running performance, making it an excellent choice for lightweight equipment operating at medium to high speeds.

Standard Dimensions

Despite its slim profile, the 6705 bearing is manufactured to international dimensional standards, allowing easy replacement in compatible equipment.

Designed for Equipment Where Every Millimeter Counts

In many industries, reducing equipment size is no longer simply a design preference—it is a market requirement.

Compact industrial robots, portable medical devices, precision measuring instruments and lightweight automation systems all benefit from components that occupy less space.

The 6705 bearing helps designers:

• Reduce housing dimensions.
• Lower overall equipment weight.
• Increase design flexibility.
• Improve energy efficiency by reducing rotating mass.
• Maintain smooth operation at high speeds.

These advantages make the bearing particularly valuable in next-generation equipment.

Typical Applications

Industrial Robotics

Robot joints often require compact bearings that can operate with high positional accuracy while fitting into limited installation spaces.

The 6705 bearing is commonly selected for auxiliary rotating mechanisms and lightweight robotic assemblies.

Medical Equipment

Medical devices frequently require quiet operation, compact construction and reliable performance.

Applications include:

• Diagnostic instruments
• Medical pumps
• Laboratory automation
• Portable healthcare equipment

Precision Electric Motors

Compact servo motors and small electric drives benefit from the bearing’s low friction characteristics and lightweight construction.

Automation Systems

Pick-and-place units, packaging machinery and precision positioning equipment often use thin section bearings to maximise available installation space.

Optical and Measuring Instruments

High rotational accuracy is essential for instruments requiring repeatable positioning and smooth movement.

Why Thin Section Bearings Are Different

Although the 6705 shares the same basic operating principle as standard deep groove ball bearings, its design philosophy is different.

Instead of maximising load capacity, thin section bearings prioritise:

• Compact dimensions
• Weight reduction
• High rotational efficiency
• Precision movement
• Space optimisation

For equipment designers, these characteristics often provide greater overall system benefits than simply increasing bearing size.

Selecting the Right Version

The 6705 bearing is available in several configurations.

Open Type

Suitable for equipment using external lubrication systems where periodic maintenance is planned.

6705ZZ

Double metal shields reduce contamination while maintaining excellent rotational speed.

Recommended for:

• Electric motors
• Indoor automation
• Precision machinery

6705-2RS

Rubber seals provide improved protection against dust and moisture.

Recommended for:

• Outdoor equipment
• Humid environments
• Light industrial machinery

Engineering Considerations Before Selection

Choosing a thin section bearing requires more than matching dimensions.

Engineers should evaluate:

• Maximum operating speed
• Shaft and housing accuracy
• Expected service life
• Radial load requirements
• Lubrication method
• Environmental cleanliness

Considering these factors during the design stage helps achieve reliable long-term performance.

Manufacturing Quality at NKMB

Every NKMB 6705 bearing is produced using carefully controlled manufacturing processes.

Quality control includes:

• Premium GCr15 bearing steel
• Automated heat treatment
• Precision raceway grinding
• Roundness inspection
• Noise and vibration testing
• Grease filling verification
• Final dimensional inspection

These procedures help ensure consistent quality across every production batch.

OEM and Customization Services

NKMB supports OEM and ODM projects for customers worldwide.

Available services include:

• Custom laser marking
• Private label packaging
• Special grease selection
• Custom clearance classes
• Precision grade selection
• Bulk industrial supply

Whether supplying distributors or equipment manufacturers, NKMB provides flexible production solutions to meet different market requirements.

Frequently Asked Questions

What are the dimensions of the 6705 bearing?

The standard dimensions are 25 mm × 32 mm × 4 mm.

Is the 6705 bearing suitable for high-speed applications?

Yes. When correctly lubricated and installed, the 6705 bearing performs well in many medium- and high-speed applications.

What is the difference between a 6705 bearing and a standard bearing?

The 6705 belongs to the thin section bearing series. Its slimmer cross-section helps reduce equipment size and weight while maintaining smooth rotational performance.

Can NKMB manufacture customized 6705 bearings?

Yes. NKMB offers OEM services, including customized branding, packaging, lubrication options and technical specifications for industrial customers.

Conclusion

The 6705 bearing is an excellent solution for engineers developing compact, lightweight and high-precision equipment. Its thin section design enables greater flexibility in mechanical layouts while delivering reliable rotational performance.

With advanced production technology, strict quality control and comprehensive OEM support, NKMB supplies 6705 bearings that meet the requirements of robotics, medical equipment, automation systems and precision industrial machinery worldwide.