5x30x20 Shielded Ball Bearing C1 L9 With M4 Stud Rubber Mount, Polyurethane Black, Double Ball Bearing, 5mm Inner Diameter, 30mm Outer Diameter, 20mm Width, ZZ Shields

Seal-Pro PU Shielded Bearing with M4 Stud - Single Pack
✔️ 5x30x20 shielded PU bearing; 5mm ID, 30mm OD, 20mm W, M4 stud

This compact shielded bearing uses black polyurethane and a rubber-mountable body, built around a 5 mm bore, 30 mm outer diameter, and 20 mm width. It comes with an M4 threaded stud (9 mm length) for quick mounting in small machines, hobby robotics, 3D printers, and compact CNC setups.

✅ Size: 5 mm bore x 30 mm OD x 20 mm W
✅ Shielding: ZZ shielded, C1 clearance; PU rubber seal
✅ Material: Black polyurethane body with PU rubber shield
✅ Mounting: M4 threaded stud, 9 mm length
✅ Quantity: 1 bearing per pack (Single Pack)

💡 What is a shielded ball bearing used for in lightweight machinery?

Shielded designs keep moving parts smooth and protected in compact systems.

- Handy for hobby robotics, 3D printers, and compact machines - Reduces friction and wear while keeping contaminants out - Mounts easily with standard M4 studs for quick upgrades - Works with polyurethane or nylon housings in lightweight setups