688-2RS Bearings
$12.99
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10-pack of 688-2RS sealed miniature bearings for compact 3D-printer, CNC, robotics, and hobby motion assemblies that call for an 8mm ID × 16mm OD × 5mm bearing.
Why this bearing
- 2RS rubber seals on both sides help keep grease in and dust out.
- Deep-groove ball bearing geometry supports smooth high-speed radial motion in a compact package.
- Chrome steel bearing construction is the standard choice for small motion hardware and replacement spares.
- Sold as a 10-pack, so you can replace a set instead of buying one-off singles.
Specifications
- Designation / MPN: 688-2RS
- Bore / inner diameter: 8mm
- Outer diameter: 16mm
- Width: 5mm
- Closure: 2RS dual rubber seals
- Type: miniature deep-groove radial ball bearing
- Quantity: 10 bearings
Use it for
Use these wherever your printed part, motion assembly, or BOM specifically calls for a 688-2RS / 8×16×5mm sealed bearing. For nearby sizes, see our 625-2RS bearings, F695-2RS flanged bearings, and F623-RS flanged bearings.
Check before ordering
- This is a 688-2RS bearing only; it is not an LM8UU/LM8LUU linear bearing.
- Match all three dimensions — 8mm bore, 16mm OD, 5mm width — before replacing an existing bearing.
- Choose a flanged bearing instead if your application needs a locating flange.
