688ZZ Double Shielded Ball Bearing (8x16x5mm)
Product Highlights
- Precision Size: Standard 8mm Bore x 16mm OD x 5mm Width.
- ZZ Protection: Dual metal shields to block dust and retain grease.
- High-Speed: Low-friction design optimized for high RPM applications.
- Industrial Grade: Forged from GCr15 Chrome Steel for maximum durability.
- Ready to Use: Pre-lubricated with high-performance bearing grease.
25,00 EGP
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Description
688ZZ Double Shielded Ball Bearing (8x16x5mm)
The 688ZZ is a premium miniature deep groove ball bearing designed for high-speed performance and durability.
Featuring a double metal shield (ZZ), it is engineered to protect the internal components from dust and debris while
maintaining factory-applied lubrication for a smooth, low-friction rotation.
Key Features
- Double Shielded (ZZ): Metal shields on both sides prevent the entry of dust, dirt, and contaminants.
- High-Speed Operation: Optimized for low friction, allowing for high RPM with minimal heat generation.
- Pre-Lubricated: Comes factory-greased, ready for immediate installation and use.
- Chrome Steel Construction: Manufactured from high-quality GCr15 chrome steel for superior hardness and wear resistance.
- Versatile Compatibility: Fits a wide range of applications from 3D printers to high-speed handpieces.
Full Technical Specifications
| Attribute | Details |
|---|---|
| Model | 688ZZ |
| Inner Diameter (Bore) | 8.000 mm |
| Outer Diameter | 16.000 mm |
| Width (Thickness) | 5.000 mm |
| Shield Type | Non-removable Metal Shields (ZZ) |
| Material | Chrome Steel (GCr15) |
| Precision Rating | ABEC-1 / P0 |
| Dynamic Load Rating (Cr) | ~1.25 kN |
| Static Load Rating (Cor) | ~0.59 kN |
Common Applications
This bearing is highly versatile and widely used in various industries, including:
- 3D Printing & CNC: Ideal for pulleys, idlers, and linear motion systems.
- Robotics & Hobbyism: Used in RC cars, drones, and small electric motors.
- Power Tools: Found in small grinders and rotary tools.
- Office Equipment: Used in printers, scanners, and high-speed fans.
Note: While the ZZ shields provide excellent protection against dust, they are not waterproof. For environments with high moisture or liquid exposure, rubber-sealed (2RS) variants are recommended.
Specification
General
| WeightWeight | 0,0000 g |
|---|---|
 Dimensions | 0,8 × 1,6 × 0,5 cm |
| Item | 688ZZ Ball Bearing |
| Type | Miniature Deep Groove Ball Bearing |
| Inner Diameter (d) | 8 mm |
| Outer Diameter (D) | 16 mm |
| Width/Thickness (B) | 5 mm |
| Closures | 2 Metal Shields (ZZ) – One on each side |
| Material | Chrome Steel (Standard) |
| Lubrication | Pre-lubricated with factory grease |
| Dynamic Load Rating (Cr) | ~1, 252 N |
| Static Load Rating (Cor) | ~592 N |
| Common Applications | 3D printers, CNC machines, robotics, RC cars, skateboards, and small electric motors. |
