20mm ID x 42mm OD Deep Groove Ball Bearing 20x42x12mm

9104K Open Ball Bearing
✔️ 20x42x12mm - Chrome Steel - High-Speed Open Design

The 9104K is a high-speed single-row deep groove ball bearing with an open design for maximum RPM potential. Made from chrome steel, it’s a great fit for applications where airflow or re-lubrication access is needed, like electric motors, gearboxes, or precision tools.

✅ Size: 20mm ID x 42mm OD x 12mm Width
✅ Dimensions (Inch): 0.78" x 1.65" x 0.47"
✅ Type: Single-Row Deep Groove Ball Bearing
✅ Material: Chrome Steel
✅ Closure: Open (no seals or shields)
✅ Lubrication: Requires external or manual lubrication
✅ Dynamic Load Rating: 5,600 N
✅ Static Load Rating: 2,840 N
✅ Max Speed: 24,000 RPM
✅ Quantity: 1 Bearing
✅ SKU: 6004Bearing

💡 When should you choose an open bearing over a sealed or shielded one?

1. Open bearings are ideal for high RPM environments where minimal drag is critical.

2. They’re preferred when regular re-lubrication is possible and contamination risk is low.

3. Commonly used in clean environments like lab tools, spindle assemblies, and low-dust machinery.

Optimized for fast, friction-free rotation where maintenance access is available.