POM Pulley Plastic Wheel Bearing 625ZZ

The POM Wheel with 625ZZ Ball Bearing is a high-performance plastic roller wheel combining a durable polyoxymethylene (POM/Delrin) outer wheel with a precision 625ZZ deep groove ball bearing core. This composite design delivers the best of both worlds: the smooth, quiet, low-friction operation of plastic combined with the precision and longevity of a sealed ball bearing, making it ideal for sliding doors, drawer systems, conveyor tracks, and linear motion applications.

The white or natural-colored POM wheel material offers excellent wear resistance, low friction coefficient, and self-lubricating properties that reduce noise and eliminate the need for external lubrication. POM’s high dimensional stability ensures the wheel maintains its shape under load and across temperature variations, while its low moisture absorption prevents swelling in humid environments. The embedded 625ZZ bearing (5mm bore, 16mm OD, 5mm width) features double metal shields that protect against dust and contamination, ensuring smooth rotation over extended service life.

Many variants feature a U-groove or V-groove profile machined into the wheel circumference, allowing the wheel to ride smoothly along tracks, rails, angles, or guide wires without lateral deviation. The groove design provides positive guidance and prevents the wheel from jumping off the track during operation. These wheels find extensive use in sliding window and door systems, furniture drawer runners, cable management systems, industrial conveyors, CNC linear motion guides, and 3D printer linear rails where quiet operation and smooth movement are essential.

Specification :

• Material: POM (Polyoxymethylene / Delrin / Acetal)
• Bearing Type: 625ZZ deep groove ball bearing (embedded)
• Bearing Bore (Inner Diameter): 5mm
• Bearing OD: 16mm
• Bearing Width: 5mm
• Groove: Flat
• Bearing Seal: Double metal shield (ZZ)
• Wheel Outer Diameter: 24mm approx
• Wheel Width/Thickness: 10mm approx
• Chemical Resistance: Excellent (resistant to oils, solvents, weak acids/bases)
• Noise Level: Very low (quiet operation)
• Applications: Sliding doors/windows, drawer runners, conveyors, furniture, linear guides