NBC BEARING 6201 BB-18
The NBC 6201 BB-18 is a standard Deep Groove Ball Bearing manufactured by NBC Bearings. It is typically used in general machinery, electric motors, and especially in two-wheeler applications.
Here is a breakdown of the bearing designation and its key specifications:
1. Bearing Designation Breakdown
| Designation Part | Meaning | Specification |
| 6201 | Basic Bearing Series | Single-row deep groove ball bearing, light duty series. |
| BB | Sealing/Shielding | Indicates Rubber Seals on Both Sides. This means the bearing is pre-lubricated with grease and protected from dust and moisture. This is equivalent to common industry designations like 2RS, LLU, or DD. |
2. Key Dimensions
The dimensions for the 6201 series bearing are standardized globally:
| Dimension | Abbreviation | Value (Metric) |
| Inner Diameter (Bore) | $d$ | 12 mm |
| Outer Diameter | $D$ | 32 mm |
| Width | $B$ | 10 mm |
3. Typical Performance Ratings
These ratings indicate the bearing's capacity to handle loads (values may vary slightly based on the exact NBC catalogue):
Basic Dynamic Load Rating ($C$): $\approx 7.2$ to $7.7\text{ kN}$ (Capacity for dynamic/rotating loads).
Basic Static Load Rating ($C_0$): $\approx 3.0$ to $3.1\text{ kN}$ (Capacity for static/non-rotating loads).
4. Common Application
The 6201 size is one of the most common bearings. The NBC 6201 BB-18 is frequently found in:
Two-Wheelers: Used in gearboxes, wheels, and counter shafts of various scooter and motorcycle models.
General Industry: Electric motors, pumps, fans, and other light-duty rotating equipment.