80pcs Mini Ball Bearing Assortment Kit，693zz,623zz, 685zz, 624zz, 687zz,627zz,626zz, 608zz 6 Sizes Carbon Steel Double Shielded Groove Bearings for skateboards, trolleys

• 1. Package Contents： This ball bearing set includes 80 ball bearings across 8 different sizes, with 10 pieces per size. The eight specifications are listed below: 693ZZ: 3×8×4mm;623ZZ: 3×10×4mm;685ZZ: 5×11×5mm;624ZZ: 4×13×5mm;687ZZ: 7×14×5mm;627ZZ: 7×22×7mm;626ZZ: 6×19×6mm;608ZZ: 8×22×7mm. You can always find matching bearings from this kit.
• 2. Premium Material: These deep groove ball bearings are made from carbon steel, featuring outstanding durability, high-temperature resistance and anti-deformation performance. They effectively absorb vibration and impact, lower operating noise, cut down energy loss and improve transmission efficiency, making them ideal for heavy-load and frequent-use applications.
• 3. Smooth Operation: Pre-filled internal grease enables ultra-smooth rotation and minimizes routine maintenance work. Additional lubricant can be reapplied as needed to further extend service life.
• 4. Wide Application: Designed for low-speed operation below 200 RPM with inner bore machining tolerance controlled within ±0.08 mm. Perfect for light-load equipment including skateboards, inline skates, bicycles, scooters, small power tools, micro motors, model toys, printers and more.
• 5. Double-Sided Sealed Structure: Dual-side sealing prevents ingress of dust, water and other contaminants, keeping internal grease intact to reduce maintenance frequency and significantly prolong bearing service lifespan.

Features: 1,Made from high hardness carbon steel,high-temperature resistance and anti-deformation. Absorb vibration and impact, lower operating noise, cut down energy loss and improve transmission efficiency, 2,Dual-side sealing prevents ingress of dust, water and other contaminants. 3, All bearings are pre-lubricated for effortless maintenance.No maintenance required, smooth operation. 4,Suitable for skateboards, inline skates, bicycles, scooters, small power tools, micro motors, model toys, printers and so on. Specification: Material:carbon steel Color:silver Rotation Speed: below 200 RPM Tolerance: Inner bore machining tolerance controlled within ±0.08 mm Package information： 10pcs 3*8*4mm 693zz、 10pcs 3*10*4mm 623zz、 10pcs 5*11*5mm 685zz、 10pcs 4*13*5mm 624zz、 10pcs 7*14*5mm 687zz、 10pcs 7*22*7mm 627zz、 10pcs 6*19*6mm 626zz、 10pcs 8*22*7mm 608zz