6903, 6903Z, 6903ZZ, 6903RS, 6903-2RS Deep Groove Ball Bearings 17x30x7mm – Compact Precision Bearings for High-Speed & Light-to-Medium Duty Mechanical Systems

6903, 6903Z, 6903ZZ, 6903RS, 6903-2RS Deep Groove Ball Bearings 17x30x7mm – Compact Precision Bearings for High-Speed & Light-to-Medium Duty Mechanical Systems

Reliable and versatile 6903 series deep groove ball bearings in size 17mm (ID) × 30mm (OD) × 7mm (W), engineered for compact machinery and light-to-medium duty applications requiring smooth, quiet, and high-speed rotation under radial and moderate axial loads. Available in multiple sealing options to suit various operating environments:

• 6903: Open type – ideal for clean or controlled settings with custom lubrication
• 6903Z / 6903ZZ (6903-2Z): Single or double metal shields – protect against dust while retaining factory grease
• 6903RS / 6903-2RS: Single or double rubber seals – offer superior resistance to moisture and fine contaminants

Manufactured from high-quality chrome steel (GCr15) — with stainless steel available on request — these bearings feature precision-ground raceways for low friction, minimal vibration, and stable performance at elevated speeds. Commonly used in electric motors, gearboxes, agricultural equipment, small pumps, conveyors, power tools, robotics, HVAC systems, and household appliances.

Most sealed variants are pre-lubricated with long-life, low-torque grease for maintenance-free operation. The 6903 series delivers an excellent balance of compact size, load capacity, and rotational efficiency, making it a go-to choice for both industrial maintenance and OEM design where space is limited but durability matters.

🔧 Key Specifications:

• Models: 6903, 6903Z, 6903ZZ (6903-2Z), 6903RS, 6903-2RS
• Dimensions: 17 × 30 × 7 mm
• Material: Chrome Steel (GCr15) – stainless steel optional
• Precision Rating: ABEC-1 (standard); higher grades available
• Ideal for: Industrial machinery, automation, DIY repairs, and precision mechanical systems