uxcell 20pcs U604ZZ U Groove Track Guide Bearing 4x13x4mm U Groove Roller Wheel (GCr15) Chrome Steel Bearings, ABEC3

uxcell 20pcs U604ZZ U Groove Track Guide Bearing 4x13x4mm U Groove Roller Wheel (GCr15) Chrome Steel Bearings, ABEC3

U604ZZ Bearing: I.D.=4mm, O.D.=13mm, Thickness=4mm, Groove width=2mm, Groove depth=1mm. Bearing steel(GCr15) material, high hardness, and great wear resistance, showing stable performance and lasting service life. Both sides are shielded to keep lubricant and protect from dirt and debris. ABEC3 precision for smooth operation and accurate linear motion guidance. Precision bearing fits for the rail track system. Suitable for 3d printers, aluminum doors and window, sliding barn doors, pulleys and drawers, household appliance, etc. NOTE：
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. They are used to accommodate radial and axial loads in both directions.
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
Can be used to build the track system or replace the wheel, widely used in door and window to track, or drive mechanical equipment.


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:
Inner Race/Outer Race Material: Chrome Steel (GCr15)
Cage Material: Stamping Steel
Accuracy Class: P6 (ABEC3)