6004 Bearing: The Essential Guide for Engineers and Technicians

The 6004 bearing is a widely used bearing type, accounting for approximately 80% of all bearings produced worldwide. Its popularity stems from its versatility, durability, and cost-effectiveness.

Applications of 6004 Bearings

6004 bearings are employed in a vast array of industrial and consumer applications, including:

• Electric motors
• Pumps
• Compressors
• Conveyors
• Gearboxes
• Power tools
• Automotive components
• Medical equipment
• Household appliances

Technical Specifications of 6004 Bearings

The 6004 bearing is a deep-groove ball bearing with the following specifications:

• Bore diameter: 20 mm
• Outside diameter: 47 mm
• Width: 14 mm
• Ball count: 9
• Dynamic load capacity: 10.6 kN
• Static load capacity: 6.8 kN
• Limiting speed: 10,000 rpm

Features and Benefits of 6004 Bearings

6004 bearings offer several advantages over other bearing types:

• Compact design: Their small size makes them suitable for applications with limited space.
• Low friction: The smooth-running ball bearings minimize friction and energy losses.
• High load capacity: They can withstand significant radial and axial loads.
• Versatility: They are compatible with various shaft and housing configurations.
• Durability: High-quality 6004 bearings can last for years in demanding operating conditions.
• Cost-effectiveness: Their mass production and widespread availability make them economical options.

Selection and Installation of 6004 Bearings

Selecting the right 6004 bearing for an application requires careful consideration of the load, speed, and environmental conditions. Factors to consider include:

• Radial load: The bearing must be able to withstand the radial load imposed by the application.
• Axial load: If substantial axial forces are present, a bearing with an appropriate thrust capacity should be chosen.
• Speed: The bearing must be rated for the desired operating speed.
• Lubrication: 6004 bearings can be lubricated with grease or oil. The type and amount of lubrication depend on the application.
• Mounting: Proper mounting is crucial for optimal performance. Follow the manufacturer's instructions carefully.

Common Mistakes to Avoid with 6004 Bearings

Avoid these common pitfalls to enhance bearing life and performance:

• Overloading: Do not exceed the bearing's load capacity limits.
• Misalignment: Ensure proper alignment between the bearing, shaft, and housing.
• Contamination: Keep bearings clean and free from dirt and moisture.
• Improper lubrication: Use the correct lubricant and follow the recommended lubrication intervals.
• Excessive force: Avoid using excessive force when installing or removing bearings.

Humorous Stories and Lessons Learned

1. The Case of the Squeaking Fan

A technician was troubleshooting a noisy electric fan. After inspecting the motor, they discovered a worn-out 6004 bearing. The squeaking sound was caused by the damaged bearing's rough surface. Replacing the bearing resolved the issue, demonstrating how proper bearing maintenance can prevent costly repairs.

2. The Tale of the Wobbly Wheel

A factory worker noticed a slight wobble in a conveyor belt. Upon investigation, they found that the 6004 bearing in a sheave had failed. The wobbly bearing caused the sheave to run eccentrically, leading to uneven belt tension. By replacing the failed bearing, the conveyor belt resumed smooth operation.

3. The Adventure of the Mysterious Vibration

An engineer was puzzled by vibrations emanating from a machine. They checked the bearings, but all seemed fine. Finally, they discovered a loose mounting bolt on the housing of a 6004 bearing. Tightening the bolt eliminated the vibration, reminding us that even small oversights can have significant effects.

FAQs about 6004 Bearings

1. What is the difference between a 6004 bearing and a 6204 bearing?

The 6004 bearing has a wider inner ring width compared to the 6204 bearing, allowing for higher axial load capacity.

2. What is the maximum speed at which a 6004 bearing can operate?

The maximum speed limit is 10,000 rpm for 6004 bearings.

3. What material are 6004 bearings made of?

6004 bearings are typically made of high-carbon chromium steel (GCR15) or stainless steel.

4. How often should 6004 bearings be lubricated?

Lubrication intervals vary depending on operating conditions, but generally, 6004 bearings should be lubricated every 3-6 months.

5. What is the optimal clearance for a 6004 bearing?

The optimal clearance for a 6004 bearing is between 0.002-0.006 mm (0.00008-0.00024 in).

6. How to remove a 6004 bearing from a shaft?

Use a bearing puller or a 2- or 3-jaw gear puller to safely remove a 6004 bearing from a shaft.

Tables for 6004 Bearings