WBB1-8702
WBB Series Stainless Steel Miniature Bearings
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Part No.
Part No.
WBB1-8702
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.0005 kg
Tolerance class
P0
Seal type
Open
For load direction
Radial
Main Dimensions
Bore diameter
2.5 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
8 mm
Outside diameter tolerance
-0.008mm to 0
Width
2.5 mm
Width tolerance
-0.04mm to 0
Performance
Temperature range
-30° to 120 °C
Radial dynamic load rating
72 lbf
Radial static load rating
20 lbf
Limiting speed
95 X 1000 rpm
Lubrication
None
Radial internal clearance
CN
Materials
Ring material
Stainless Steel
Ball material
Stainless Steel
Cage material
Stainless Steel
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
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In Stock
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WBB1-8702 Bearing Product Overview & Core Advantages
The WBB1-8702 is a metric single row deep groove ball bearing engineered for precision applications requiring compact dimensions and reliable performance. Manufactured entirely from stainless steel, this bearing offers excellent corrosion resistance and is suitable for a wide operating temperature range. Its open design allows for versatile lubrication options, while its high limiting speed makes it ideal for demanding, high-RPM machinery. Compliant with ROHS and REACH, it is designed for applications where radial load capacity and long-term reliability are critical.
WBB1-8702 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| WBB1-8702 | Manufacturer's specific series designation for a miniature, stainless steel, deep groove ball bearing. |
| Open (Seal Type) | No integral seals or shields. Allows for custom lubrication schemes and minimizes rotational torque. |
| P0 (Tolerance Class) | Standard dimensional and running accuracy per ISO standards, suitable for most general applications. |
| CN (Radial Clearance) | Normal radial internal clearance, providing a balance between quiet operation and thermal expansion accommodation. |
WBB1-8702 Bearing Structural Features & Performance Benefits
- All-Stainless-Steel Construction: Rings, balls, and cage are manufactured from stainless steel, providing superior corrosion resistance and making the bearing suitable for harsh environments, including those with exposure to moisture or chemicals.
- Deep Groove Raceway: The geometry of the raceways enables the bearing to support significant radial loads and moderate axial loads in both directions, offering versatile load-handling capability in a compact package.
- High-Speed Capability: With a limiting speed of 95,000 rpm, the bearing is designed for high-speed applications. The precision-ground components and stable stainless steel cage contribute to smooth operation at elevated rotational velocities.
- Precision Tolerances: Manufactured to P0 (Normal) tolerance class with tight bore and outside diameter tolerances, ensuring consistent performance and reliable interchangeability.
- Open for Customization: The open seal type provides flexibility, allowing engineers to apply specialized lubricants tailored to specific operational needs, such as extreme temperatures or vacuum environments.
WBB1-8702 Bearing Typical Application Areas
This miniature deep groove ball bearing is ideally suited for applications where small size, high speed, and corrosion resistance are paramount. Key industries and equipment include:
- Precision Instruments: Optical encoders, measuring devices, and laboratory equipment.
- Small Motors and Drives: High-speed spindle motors in dental handpieces, miniature DC motors, and drones.
- Office Automation: Scanner mechanisms, printer rollers, and small cooling fans.
- Medical Devices: Surgical tools and diagnostic equipment requiring reliable, corrosion-resistant components.
- Robotics: Joints and actuators in small-scale robotic arms and automation systems.
