V Groove Metal Seal Guide Pulley Rail Ball Bearing V625ZZ 5x22x5mm Bearing Wheel

The V625ZZ is designed for standard V-slot aluminum extrusion profiles, including 20×20mm, 20×40mm, and 40×40mm sections commonly used in OpenBuilds, Rat Rig, and similar open-source motion platforms. The V groove outer race seats on the angled edge of the extrusion slot. It is not intended for round rod or linear shaft rail systems.

The V625ZZ has a 5mm bore, making it compatible with M5 shoulder bolts and M5 eccentric spacers — the standard fastener size used in most OpenBuilds-style carriage assemblies. Always use a shoulder bolt (not a standard hex bolt) to allow the bearing to spin freely.

The V625ZZ is machined from bearing steel, which provides good hardness and fatigue resistance for typical DIY motion system loads. It is well-suited for 3D printer carriages, laser engraver gantries, and light CNC router axes. For heavy-duty industrial loads or high-speed applications, consult the dynamic load rating of the specific bearing batch before use.

The V625ZZ uses standard bearing steel with metal shields, which provides moderate protection against light moisture and dust. It is not a stainless steel bearing and is not rated for wet, washdown, or highly corrosive environments. For outdoor or humid applications, consider a stainless steel variant or apply a compatible bearing lubricant after installation.

A typical CoreXY or Cartesian 3D printer carriage uses 4–6 V groove wheels per axis. A full machine build (X, Y, and Z axes combined) may require 10 or more wheels. The 1Pc option is ideal for single replacements; the 4Pcs pack suits a single-axis rebuild; the 10Pcs pack is the most economical choice for full builds or keeping spares on hand.

Yes. The V625ZZ bearing is factory pre-lubricated with grease sealed behind the double metal shields. No additional lubrication is required before installation. If you are operating in an unusually high-temperature or high-speed environment, you may open the shields and re-pack with a compatible bearing grease, though this is not necessary for standard DIY motion system use.

The V625ZZ is compatible with any 3D printer that uses V-slot extrusion rails and M5 carriage bolts, including Creality Ender series, CR-10, and many other V-slot-based designs. Voron printers typically use linear rails (MGN series) rather than V-slot extrusion, so verify your specific printer's motion system before ordering.