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【Product Description】
100x 681ZZ Miniature Ball Bearings – 1x3x1mm Deep Groove Micro Bearing for Models
This pack contains 100 high-quality 681ZZ miniature ball bearings with dimensions 1x3x1mm. These deep groove, metal-shielded (ZZ) bearings feature a cage-free inner full ball arrangement for smooth, flexible operation. Ideal for skateboard wheels, model making, toys, furniture accessories, assembly lines, hand spinners, and small machinery.
【Technical Specifications】
| Parameter | Value |
|-----------|-------|
| Model | 681ZZ |
| Inner Diameter (ID) | 1 mm |
| Outer Diameter (OD) | 3 mm |
| Thickness | 1 mm |
| Material | Iron / Steel |
| Shield Type | Metal Shield (ZZ – both sides) |
| Ball Arrangement | Cage-free, full ball |
| Color | Silver |
| Weight (per bearing) | approx. 1 g |
| Quantity | 100 pieces |
【Key Features】
✓ Miniature size – Tiny 1x3x1mm dimensions for precision applications
✓ Deep groove design – Smooth rotation, radial and axial load capacity
✓ Metal shielded (ZZ) – Protects against dust and debris
✓ Cage-free full ball arrangement – Maximum ball complement for higher load capacity
✓ Flexible operation – Low friction, smooth running
✓ Cost-effective – Great value for bulk quantities
✓ Bright finish – Clean, professional Application | Suitable |
|-------------|----------|
| Skateboard wheels | ✅ Yes (small scale) |
| Model making | ✅ Yes |
| RC cars / drones | ✅ Yes |
| Toys | ✅ Yes |
| Furniture accessories | ✅ Yes |
| Assembly lines | ✅ Yes |
| Hand spinners | ✅ Yes |
| 3D printers | ✅ Yes |
| Small machinery | ✅ Yes |
| Miniature motors | ✅ Yes |
【Compatible Use Cases】
✓ Small wheel rollers and casters
✓ Hinge and pivot points
✓ Gearboxes and transmissions
✓ Filament guides for 3D printers
✓ Fidget spinner bearings
✓ Precision instrumentation
✓ Hobby and craft projects
【Bearing Dimensions Reference】
| Dimension | Size | Tolerance Inner Diameter | 1 mm | Precision ground |
| Outer Diameter | 3 mm | Precision ground |
| Width / Thickness | 1 mm | Precision ground |
【Advantages of 681ZZ Bearings】
| Feature | Benefit |
|---------|---------|
| Metal shields (ZZ) | Keeps contaminants out |
| Cage-free design | More balls, higher load capacity |
| Deep groove | Accommodates radial and axial loads |
| Miniature size | Fits tight spaces |
| Pre-lubricated | Ready to use out of the box |
【How to Use】
| Step | Action |
|------|--------|
| 1 | Prepare a shaft with 1mm diameter |
| 2 | Slide the bearing onto the shaft |
| 3 | Press into housing (3mm inner diameter) |
| 4 | Ensure proper alignment before use |
| 5 | For best results, use on clean surfaces |
【Storage Tips】
✓ Store in a dry, clean container
✓ Keep away from dust and moisture
✓ Avoid dropping (precision components)
✓ Use clean gloves when handling
【Package Includes】
100 x 681ZZ Miniature Ball Bearings (1x3x1mm, metal shielded)
【Important Notes】
⚠️ These are precision components – handle with care
⚠️ Do not remove shields unless necessary
⚠️ Keep away from magnets (bearings are ferrous)
⚠️ Not suitable for high-speed applications over 20,000 RPM
⚠️ For best results, ensure proper shaft fit (1mm tolerance)
【Model Number Explained】
| Code | Meaning |
|------|---------|
| 68 | Series – Miniature bearings |
| 1 | Inner diameter (1mm) |
| ZZ | Metal shields on both sides |
✅ Ideal for hobbyists, model makers, RC enthusiasts, engineers, 3D printer users, fidget spinner collectors, small machinery builders, and DIY creators – a bulk 100-pack of 681ZZ miniature ball bearings for all your small-scale rotational applications!
