ZEN 61701-2RS Deep Groove Ball Bearing 12x18x4 mm

AI Overview

The ZEN 61701-2RS is a premium single-row deep groove ball bearing designed for applications requiring compact dimensions, smooth rotation and high operating speeds. With dimensions of 12x18x4 mm, this thin-section bearing is equipped with double rubber seals (2RS) that protect the internal raceways against dust, moisture and contaminants while retaining factory-filled grease for long-term maintenance-free operation.

Its compact design, low friction and high rotational accuracy make it an excellent choice for electric motors, miniature gearboxes, RC models, robotics, medical devices, measuring equipment and industrial automation systems.

What Makes the 61701-2RS Different?

The 61701-2RS belongs to the thin-section 61700 Series, developed for compact mechanisms where space, weight and rotational efficiency are critical.

Key advantages include:

• Genuine ZEN bearing
• Thin-section design
• Double rubber contact seals (2RS)
• Factory lubricated
• Low rolling friction
• High rotational accuracy
• Quiet operation
• Suitable for high-speed applications
• Supports radial and moderate axial loads
• Long service life

The double-contact sealing system significantly increases bearing reliability by protecting against contamination while maintaining lubrication.

Construction and Operating Principle

The bearing consists of:

• Inner ring
• Outer ring
• Precision steel balls
• Pressed steel cage
• Double rubber contact seals

The balls roll within precision-ground raceways, minimizing friction while providing smooth and efficient rotation.

This design offers:

• Low operating torque
• Smooth rotation
• High efficiency
• Excellent running accuracy
• Uniform load distribution
• Reliable long-term performance

The rubber seals retain lubricant and effectively prevent dirt, dust and moisture from entering the bearing.

Material Properties

The bearing is manufactured from premium bearing steel designed for high fatigue resistance and precision performance.

Material characteristics include:

• Hardened bearing raceways
• Precision steel balls
• Pressed steel cage
• Contact rubber seals
• Factory-filled grease
• Excellent wear resistance
• High fatigue strength
• Long operational life

These features ensure reliable operation even in demanding industrial environments.

Typical Industrial Applications

Typical applications include:

• Electric motors
• Miniature gearboxes
• RC models
• Drones
• Cooling fans
• Water pumps
• Measuring instruments
• Medical equipment
• Industrial automation
• Robotics
• Precision machinery
• Compact mechanical assemblies

Typical Failure Symptoms

Replacement should be considered if any of the following symptoms occur:

• Increased operating noise
• Excessive vibration
• Radial play
• Rough rotation
• Bearing overheating
• Damaged seals
• Grease leakage
• Corrosion
• Raceway damage
• Reduced rotational smoothness

Recommended During Maintenance

During servicing it is recommended to inspect:

• Shaft condition
• Housing condition
• Shaft and housing fits
• Bearing alignment
• Cleanliness
• Lubrication condition
• Adjacent seals
• Installation procedure
• Source of contamination
• Surrounding drive components

Technical Specification

Manufacturer: ZEN

Part Number: 61701-2RS

Type: Deep Groove Ball Bearing

Design: Single Row, Thin Section, Double Rubber Sealed

Inner Diameter: 12 mm

Outer Diameter: 18 mm

Width: 4 mm

Sealing: 2RS (Double Rubber Contact Seals)

Internal Clearance: CN (Normal)

Cage: Pressed Steel

Material: Bearing Steel

Dynamic Load Rating (C): 0.926 kN

Static Load Rating (C₀): 0.530 kN

Limiting Speed (Grease): 13,000 rpm

Limiting Speed (Oil): 15,000 rpm

Operating Temperature: Suitable for the operating temperature range specified by the manufacturer for grease-lubricated deep groove ball bearings.

Application: Electric motors, miniature gearboxes, pumps, fans, RC models, medical devices, precision instruments, robotics, industrial automation and compact machinery.

Cross References

This bearing is also identified as:

• ZEN 61701-2RS
• 61701-2RS
• 61701 2RS
• 61701 RS
• 61701 DDU (manufacturer dependent)
• 61701 LLU (manufacturer dependent)
• 12x18x4 Ball Bearing

Equivalent designation may vary between manufacturers, while maintaining identical dimensional standards.

Related Components

Frequently replaced together with:

• Precision shafts
• Spacer sleeves
• Retaining rings
• Shaft seals
• Bearing housings
• Flexible couplings
• Drive pulleys
• Timing belts
• Bearing grease
• Mechanical seals

Why B2B Customers Choose ZEN

Industrial customers select ZEN bearings because of:

• Excellent manufacturing quality
• Competitive price-to-performance ratio
• Long service life
• Consistent dimensional accuracy
• Reliable operation
• Low maintenance requirements
• Broad industrial compatibility
• International quality standards

ZEN bearings are trusted worldwide in industrial, automotive and precision engineering applications.

Professional Industrial Supply

ZEN bearings are regularly supplied to:

• Machine manufacturers
• Maintenance departments
• Industrial workshops
• Electric motor manufacturers
• Automation companies
• Industrial service providers
• Pump manufacturers
• Fan manufacturers
• Technical distributors
• Production facilities

Popular Searches

• ZEN 61701-2RS
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• 12x18x4 Ball Bearing
• Thin Section Bearing
• Deep Groove Ball Bearing 61701
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FAQ

What does 2RS mean?

2RS indicates two rubber contact seals that protect the bearing against dust, moisture and contaminants while retaining lubricant inside.

Is the bearing pre-lubricated?

Yes. The bearing is factory-filled with grease and is ready for immediate installation.

Can this bearing support axial loads?

Yes. Deep groove ball bearings are designed to support radial loads as well as moderate axial loads in both directions.

Where is the 61701-2RS commonly used?

It is widely used in electric motors, miniature gearboxes, RC models, pumps, fans, medical devices, robotics and industrial automation equipment.

Is this bearing suitable for high-speed operation?

Yes. Its precision thin-section design and low-friction construction make it suitable for high rotational speeds within the manufacturer's specified operating limits.