x2 U604ZZ Bearings 4x13x4mm – U groove, Walking Guide Rail Bearings, 3D Printer.

Description:

U604ZZ bearings are specially guide wheel and pulley wheel for 3D printer extrude, press machine.

Single-row, pre-lubricated, normal accuracy, low noice and smooth.

With small friction and high-limit speed, these u groove pulley bearings are cost-effective
and require little maintenance.

Chromium Steel (GCr15) made with heat treating, provides high and uniform hardness,
good wear resistance, and high contact fatigue performance.

Specification:

Model: U604ZZ (604UU)

Shielded Type: Double Shielded

Inner Race/Outer Race Material: Chrome Steel

Cage Material: Steel

Inner Diameter (d): 4mm

Outer Diameter (D): 13mm

Thickness (B): 4mm

Groove Width (C): 2.1mm

Groove Depth: 1mm