10pcs 940 684ZZ ABEC-9 Bearings 4x9x4mm Ball Bearings Handle Ball Bearing kit Electric Nail Drill
Special Features
- Bearings play a major role in fixing and reducing the friction coefficient of loads in mechanical transmission.
- Bearings are used to reduce friction during power transmission and keep the shaft center fixed.
- Simple structure, high speed, small friction coefficient, small vibration and low noise.
- Application: Widely used in industrial machinery, motorcycles, automobiles, power tools and mechanical equipment.
Description
Product number: 684ZZ
Structure: Deep groove
Material: Bearing steel
Aperture(d): 4 mm
Outer diameter (D): 9 mm
Width(B): 4 mm
Closure: Metal seal
Bearing grade: ABEC-9
Ball material: bearing steel GCr15
Bearing characteristics: stable operation, high speed
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