Please refer to the picture and select right type of bearings before your order (Sealed or Shield on BOTH or SINGLE side of the bearing). Suffix on the bearing just for differentiating between Sealed and Shield type of bearing. It would not affect the use of our product.
Description:
Single-row, pre-lubricated, normal accuracy.
Deep Groove Ball Bearings are one of the most widely used rolling bearings.
With small friction and high-limit speed, Ball Bearings are cost-effective and require little maintenance.
Chromium Steel (GCr15) made with heat treating, provides high and uniform hardness, good wear resistance
Suitable for all kinds of industrial equipment, micro motor, small rotary motor, office equipment and so on.
Selection Guide:
Shields (Designation Suffix Z/ZZ) - High speed. Protect from dirt and debris.
Sealed (Designation Suffix RS/2RS) - Made of sheet steel reinforced nitrile butadiene rubber (oil- and liquid-resistant). Lower limit speed than Shield Bearings.

Specification:
Model: F6904ZZ
Shielded Type: Double Shielded
Inner Race/Outer Race Material: Chrome Steel (GCr15)
Cage Material: Stamping Steel
Inner Diameter (d): 20mm
Outer Diameter (D): 37mm
Thickness (B): 9mm
Flange Dia.: 40mm
Flange Thickness: 2.1mm
Accuracy Class: P0 (ABEC1)
Noise Level: Z1
Number of Pack: 2 Pcs