Shielded Miniature Ball Bearings 3x9x4 Set Of 10 Chrome Steel Double Shield ZZ For Dust Resistance, High Durability And Precise Performance In Small Machinery, RC Models, Drones And Robotics

Ten-Pack Shielded 3x9x4 Miniature Ball Bearings
✔️ 3x9x4 shielded bearings, chrome steel, pre-lubricated, pack of 10

These small shielded ball bearings measure 3x9x4 mm and come with double metal shields (ZZ) to resist dust. Pre-lubricated with grease, they’re ready for immediate use in hobby projects, model builds, and compact machinery.

✅ Inner diameter 3 mm, outer diameter 9 mm, width 4 mm
✅shields Shielded shields
✅ スムーズな動作のためにグリースがあらかじめ塗布されています
✅ Chrome steel construction with Cr 430 N dynamic, Cor 160 N static
✅ Grease-lubricated up to 60,000 RPM for high-speed use
✅ Pack of 10 bearings for quick replacements

💡 What is a shielded miniature bearing used for in handy small machines? They’re handy in tight spaces where smooth rotation matters. - Handy in hobby RC devices, 3D printers, and compact gear boxes - Shielded double shields keep dust out and extend life - 3x9x4 mm size fits small shafts - Pre-lubricated chrome steel ensures immediate use