10Pcs Miniature Ball Bearings 2–10mm Bore GCr15 Chrome Steel

JARBLUE 10Pcs Miniature Ball Bearings – Precision GCr15 Chrome Steel

Upgrade your mechanical projects with this set of 10 miniature ball bearings from JARBLUE. Available in a wide range of bore sizes — 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, and 10mm — these compact bearings deliver smooth, low-friction rotation for RC models, power tools, printers, robotics, skateboard wheels, and a variety of precision engineering applications.

Key Features

• Material: GCr15 High Carbon Chromium Bearing Steel — renowned for hardness, wear resistance, and long service life
• Lubrication: Pre-packed with quality grease for immediate use and lasting performance
• Seals: Both sides metal-sealed to keep lubricant in and contaminants out
• Dimensions: Listed as Inner Diameter × Outer Diameter × Width (mm). Available sizes include: 2×5×2.5, 2×6×2.5, 3×8×4, 4×10×4, 8×22×7, and more
• Quantity: 10 bearings per set
• Customizable: Multiple size options available to suit your specific application

Specifications

Perfect For

• RC cars, drones, and model aircraft
• 3D printers and CNC machines
• Robotics and automation components
• Skateboard and inline skate wheels
• Power tools and hand tools
• DIY mechanical and engineering projects

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Frequently Asked Questions

Q: What sizes are included in the 10-piece miniature bearing set?

A: The set is available in multiple bore diameter options ranging from 2mm to 10mm, including popular dimensions such as 2×5×2.5mm, 2×6×2.5mm, 3×8×4mm, 4×10×4mm, and 8×22×7mm (Inner Diameter × Outer Diameter × Width). Please select your preferred size at checkout.

Q: What material are these miniature bearings made from?

A: These bearings are made from GCr15 High Carbon Chromium Bearing Steel, a premium grade bearing steel known for exceptional hardness, wear resistance, and durability under continuous rotational loads.

Q: Are these bearings pre-lubricated and sealed?

A: Yes. Each JARBLUE miniature bearing comes pre-packed with quality grease and features double-sided metal seals that keep lubricant in place and protect against dust, debris, and moisture — making them ready to use right out of the package.

Q: What applications are these miniature bearings suitable for?

A: These small ball bearings are ideal for RC vehicles, 3D printers, CNC routers, robotics, skateboard wheels, power tools, and other precision DIY mechanical applications that require compact, smooth-running bearings.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.