WBB1-8705 R-2Z
WBB Series Stainless Steel Flanged Miniature Bearings
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Part No.
Part No.
WBB1-8705 R-2Z
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.0014 kg
Tolerance class
P0
Seal type
Shielded
For load direction
Radial
Main Dimensions
Bore diameter
5 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
10 mm
Outside diameter tolerance
-0.008mm to 0
Width
4 mm
Width tolerance
-0.12mm to 0
Outer Ring Dimensions
Flange outer diameter
11.6 mm
Flange thickness
0.8 mm
Performance
Temperature range
-30° to 120 °C
Radial dynamic load rating
56 lbf
Radial static load rating
19 lbf
Limiting speed
67 X 1000 rpm
Lubrication
Grease
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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WBB1-8705 R-2Z Bearing Product Overview & Core Advantages
The WBB1-8705 R-2Z is a miniature deep groove ball bearing engineered for precision and reliability in compact applications. Constructed entirely from stainless steel, it offers excellent corrosion resistance. Its shielded (2Z) design provides effective contamination protection while the pre-lubricated grease ensures smooth, low-torque operation and long service life without maintenance. This bearing is designed to handle primarily radial loads and is characterized by its high limiting speed and consistent performance within a wide temperature range.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| WBB1-8705 | Manufacturer's specific series designation for this miniature bearing size. |
| R | Indicates the bearing is of a flanged design, facilitating simplified mounting and axial location. |
| 2Z | Signifies that the bearing is shielded on both sides. This protects the internal components from contaminants while allowing for high-speed operation. |
WBB1-8705 R-2Z Bearing Structural Features & Performance Benefits
- Compact & Lightweight Design: With dimensions of 5x10x4 mm and a weight of only 0.0014 kg, it is ideal for applications with severe space and weight constraints.
- Corrosion Resistance: The use of stainless steel for all critical components (rings, balls, cage) ensures reliable performance in harsh or washdown environments.
- High-Speed Capability: The combination of a stainless steel cage, precision-ground balls, and optimized grease lubrication enables a high limiting speed of 67,000 rpm.
- Simplified Mounting: The integrated flange (OD: 11.6 mm) allows for easy and secure axial positioning within a housing, reducing assembly complexity and cost.
- Maintenance-Free Operation: The shielded construction and factory-applied grease make the bearing sealed for life, eliminating the need for relubrication.
WBB1-8705 R-2Z Bearing Typical Application Areas
This bearing is commonly specified in:
- Small Precision Motors (e.g., stepper motors, coreless motors)
- Medical and Dental Handpieces
- Optical Encoders and Scanners
- Office Automation Equipment (printers, scanners, copiers)
- Instrumentation and Control Devices
- Radio Control Models and Drones
