Key Features
1. Dust-Tight Metal Shielding (2Z/ZZ)
We equip these bearings with precision-stamped metal shields on both sides, creating a non-contact barrier that blocks nearly all solid contaminants from entering the bearing cavity. This design preserves the integrity of the internal lubrication and prevents abrasive wear, directly extending the service life of the bearing in dusty environments.
2. Lifetime Pre-Lubricated, Maintenance-Free Operation
Every bearing is factory-filled with a high-performance, long-lasting grease formula. Once installed, there is no need for periodic relubrication, cutting down on maintenance labor, downtime, and operational costs over the bearing's entire lifecycle.
3. Optimized for High-Speed, Low-Friction Performance
The precision-machined deep-groove raceway geometry minimizes rolling friction and heat generation, enabling these bearings to operate at high limiting speeds while maintaining smooth, quiet rotation. This makes them a reliable choice for high-RPM applications where efficiency is critical.
4. Universal ISO/GB Standard Compatibility
Manufactured to meet strict ISO and GB dimensional standards, our double shielded series covers the most widely used size families (60, 62, 63, 64 series). They can be directly swapped for open or sealed bearings of the same basic model number, simplifying inventory management and replacement workflows.
Technical Specifications
|
Parameter |
Value (Example: 6204-2Z) |
|
Model |
6204-2Z |
|
Bore d |
20 mm |
|
Outer Diameter D |
47 mm |
|
Width B |
14 mm |
|
Seal Type |
Double Metal Shield (2Z/ZZ) |
|
Dynamic Load Rating Cr |
13.0 kN |
|
Static Load Rating C0r |
6.7 kN |
|
Limiting Speed (Grease Lubrication) |
15,000 r/min |
|
Precision Class |
ABEC 1 / P0 (Standard) |
Applicable Scenarios
These bearings are the ideal choice for applications where dust protection and reliable performance are non-negotiable:
● Industrial motors, exhaust fans, and water pumps
● Portable power tools and compact gearboxes
● Automated assembly lines and material handling conveyors
● Textile machinery and light-duty food processing equipment (in low-dust environments)
● Household appliances including washing machines, air conditioners, and ceiling fans
FAQ
Q1: What's the key difference between 2Z metal shields and 2RS rubber seals?
A1: The 2Z metal shield is a non-contact design, optimized for high rotational speeds and effective dust blocking. The 2RS rubber seal is a contact-type seal that delivers superior protection against moisture and oil contamination, but operates at a slightly lower maximum speed limit.
Q2: Is relubrication possible for 2Z bearings?
A2: No. The 2Z shielded design is permanently sealed at the factory with pre-filled grease. This is a true maintenance-free bearing; attempting to reopen or relubricate it will damage the seal and void its performance guarantees.
Q3: How do I select the correct bearing model for my application?
A3: Start by matching the inner bore size to your shaft diameter, then consider your radial/axial load requirements, maximum operating speed, and the available installation envelope. We maintain a full inventory of standard sizes; our technical support team can help you narrow down the best option for your specific use case.