6904, 6904Z, 6904ZZ, 6904RS, 6904-2RS Deep Groove Ball Bearings 20x37x9mm – Precision Bearings for High-Speed & Medium-Duty Mechanical Applications

6904, 6904Z, 6904ZZ, 6904RS, 6904-2RS Deep Groove Ball Bearings 20x37x9mm – Precision Bearings for High-Speed & Medium-Duty Mechanical Applications

High-performance 6904 series deep groove ball bearings in size 20mm (ID) × 37mm (OD) × 9mm (W), designed for medium-duty mechanical systems requiring smooth, quiet, and high-speed rotation under radial and moderate axial loads. Ideal for industrial, automotive, and consumer applications where reliability and compact design matter.

Available in multiple sealing configurations to suit diverse environments:

• 6904: Open type – best for clean or controlled settings with custom lubrication
• 6904Z / 6904ZZ (6904-2Z): Single or double metal shields – protect against dust while retaining factory grease
• 6904RS / 6904-2RS: Single or double rubber seals – provide excellent resistance to moisture, dust, and contaminants

Manufactured from premium chrome steel (GCr15) — with stainless steel available on request — these bearings feature precision-ground raceways for low friction, minimal noise, and stable operation at high RPMs. Commonly used in electric motors, gearboxes, agricultural machinery, pumps, compressors, power tools, conveyors, HVAC systems, and small automotive components.

Most sealed variants are pre-lubricated with long-life, low-torque grease for maintenance-free performance. The 6904 series offers a strong balance of load capacity, rotational accuracy, and durability in a compact footprint—making it a preferred choice for both OEM design and replacement use.

🔧 Key Specifications:

• Models: 6904, 6904Z, 6904ZZ (6904-2Z), 6904RS, 6904-2RS
• Dimensions: 20 × 37 × 9 mm
• Material: Chrome Steel (GCr15) – stainless steel optional
• Precision Rating: ABEC-1 (standard); higher grades available
• Ideal for: Industrial equipment, automation, DIY repairs, and medium-load mechanical systems