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.
6004 bearings are employed in a vast array of industrial and consumer applications, including:
The 6004 bearing is a deep-groove ball bearing with the following specifications:
6004 bearings offer several advantages over other bearing types:
Selecting the right 6004 bearing for an application requires careful consideration of the load, speed, and environmental conditions. Factors to consider include:
Avoid these common pitfalls to enhance bearing life and performance:
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.
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.
Manufacturer | Part Number | Material | Dynamic Load Capacity (kN) |
---|---|---|---|
SKF | 6004-2RS | GCR15 | 10.6 |
NSK | 6004ZZ | Stainless Steel | 8.5 |
Timken | HM6004 | High-Carbon Steel | 12.2 |
Nachi | 6004W | Chromium-Alloy Steel | 9.8 |
FAG | 6004U | Nickel-Alloy Steel | 11.5 |
Lubricant Type | Lubrication Interval |
---|---|
Grease (Lithium-based) | 3-6 months |
Oil (ISO VG 100) | 1-2 months |
Oil (ISO VG 220) | 6-12 months |
Mounting Method | Advantages | Disadvantages |
---|---|---|
Press-Fit | Secure mounting, high load capacity | Requires specialized tools, damage to bearing if not done properly |
Snap Ring | Easy to install and remove | Can be less secure than press-fit |
Housing | Provides additional support to bearing | Requires more complex housing design |
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