MR104 Chrome Steel Micro Miniature Deep Groove Ball Bearing 4×10×4mm for Compact Precision Industrial Machinery

The MR104 Micro Miniature Deep Groove Ball Bearing features compact size with thickened width, high-hardness chrome steel brings low-noise, steady precision rotation, fit miniature devices with limited installation space.

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Full technical data and drawings available upon request

• Compact outer size with wider width for better load capacity
• Low friction design delivers silent, stable high-speed rotation
• High hardness chrome steel extends service life under light loads
• Precision manufacturing meets strict miniature assembly demands
• Custom open/sealed structure, clearance and special grease options

Helps reduce maintenance cost and improve machine performance

This bearing is widely used in:

• Micro motors, miniature fans and electronic precision components
• RC hobby models, toy gearboxes and small rotary hand tools
• Mini medical instruments, optical lens precision equipment
• Smart wearable electronics and tiny transmission assemblies

Ideal for customers looking for reliable and long‑life bearing solutions

• 25+ years experience in industrial bearing manufacturing
• Exported to 50+ countries worldwide
• Rich experience in OEM & custom projects
• Strict quality inspection before shipment
• Fast response within 24 hours
• Stable supply for long‑term cooperation

We focus on quality, reliability, and long‑term partnership

• Raw material inspection
• Precision machining process
• Heat treatment control
• Clearance & rotation testing
• Final inspection before delivery

Ensuring consistent performance for every bearing

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