WBB1-8700
WBB Series Stainless Steel Miniature Bearings
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Basic Information
Main Dimensions
Performance
Materials
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WBB1-8700 Bearing Product Overview & Core Advantages
The WBB1-8700 is a miniature deep groove ball bearing designed for applications demanding extreme precision and compact design. As a single row, open-type metric bearing, it excels in handling radial loads with high reliability. Manufactured entirely from stainless steel, it offers excellent corrosion resistance. Its exceptionally small dimensions (1.2mm bore, 4mm OD) and low weight make it ideal for space-constrained, high-speed mechanisms requiring smooth operation and long service life.
WBB1-8700 Bearing Model Code Explained, Specifications & Naming Convention
The model number WBB1-8700 and its associated specifications indicate the following technical features:
- WBB1 Series: Denotes a specific series of miniature, deep groove ball bearings.
- 8700: A unique identifier within the series for this specific size and configuration.
- Open (Seal Type): The bearing is unsealed, allowing for maximum limiting speed and minimal running torque.
- P0 Tolerance Class: Standard dimensional and geometrical tolerance, suitable for a wide range of general applications.
- CN Radial Clearance: Standard (normal) radial internal clearance.
- Lubrication: None: Supplied without grease, allowing for application-specific lubrication or dry running in certain environments.
WBB1-8700 Bearing Structural Features & Performance Benefits
The performance of the WBB1-8700 is derived from its robust construction and material selection:
- All-Stainless-Steel Construction: The rings, balls, and stainless steel cage provide superior corrosion resistance, making the bearing suitable for harsh environments and ensuring long-term dimensional stability.
- High-Speed Capability: The open design and precision-ground components contribute to a high limiting speed of 140,000 rpm, which is critical for miniature high-speed applications.
- Precision & Low Friction: Manufactured to metric standards with tight tolerances on bore diameter, outside diameter, and width, ensuring precise fit and smooth, low-friction rotation.
- Radial Load Capacity: Engineered to handle the specified radial dynamic and static load ratings effectively within its compact footprint.
WBB1-8700 Bearing Typical Application Areas
This miniature bearing is ideally suited for precision instruments and compact devices, including:
- Small DC and coreless motors
- Medical devices and surgical tools
- Precision optical instruments and lens assemblies
- Miniature drones and RC models
- Office automation equipment (e.g., small printers, scanners)
- Instrumentation and sensor gimbals
