LM6 8 10 12 13 16 20 25 30 35 40 50 60 80 100UU Linear Ball Bearings, 3D Printer CNC Part

description

1. Performance
   • Premium Bearing Steel GCr15 (AISI 52100): Vacuum-degas, through-hardened to HRC 60-64, delivering high wear resistance, dimensional stability and a dynamic load rating approaching 1 000 N for common LM-series sizes.
   • Double-Seal Architecture: Nitrile rubber contact seals on both ends block dust, filament chips and coolant mist, extending service life by three- to five-times versus open bearings.
   • Ultra-Low Friction Motion: 60+ hardened chromium-steel balls roll on precision-ground 60 ° raceways; coefficient of friction < 0.003 enables smooth, stick-free travel at print speeds above 250 mm s⁻¹ or CNC feed rates beyond 3 000 mm min⁻¹.
   • Standard Metric Series: Supplied in LM6UU, LM8UU, LM10UU, LM12UU … LM20UU with ISO h6 inner-diameter tolerances; directly compatible with Ø6–Ø20 mm hardened shafts used in hobby to industrial additive-manufacturing platforms.
2. How to Use on a 3 D Printer
   • Rod Preparation: Pair the bearing with polished, hardened chrome-plated or stainless shafts (surface roughness Ra ≤ 0.4 µm) for optimum lifespan and print accuracy.
   • Press-Fit Assembly: Seat the bearing into the printed or machined carriage block using a vise or arbor press; maintain an H7 housing tolerance and avoid side-loading the seals.
   • Alignment & Lubrication: Slide the carriage onto the rod, verify bind-free travel over the entire stroke, then apply a drop of PTFE-enhanced light oil every 100 operating hours.
   • Replacement Guideline: Swap bearings when Z-banding, vibration or audible chatter appears—typical service interval is 500–1 000 printing hours under normal hobby use.
3. User-Friendly Operation
   • Plug-and-Play Dimensions: Conforms to ISO LM-UU envelope; installs without shims or specialty adapters.
   • Sealed & Pre-Greased: Factory-filled with lithium-complex grease for a clean, mess-free installation—no loose retainers to handle.
   • Universal Tooling: Removal and installation can be performed with standard shop tools such as an M5 screw-and-washer puller or a small arbor press; no proprietary fixtures required.
   • Clear Identification: Each outer shell is laser-etched with size code and batch reference, simplifying maintenance schedules and multi-size builds.
4. Quality & Longevity
   • ISO 9001 / IATF 16949 Certified Production: Fully automated lines with 100 % dimensional and acoustic inspection before packaging.
   • Endurance Validation: Sample bearings run 2 000 km at 120 mm s⁻¹ under a 20 kg radial load show radial-play growth < 0.02 mm, meeting stringent motion-control benchmarks.
   • Corrosion-Resistant Packaging: Individually vacuum-sealed with VCI rust inhibitor; shelf life exceeds five years when stored in controlled humidity.
   • Robust Operating Window: Maintains preload and low noise from −20 °C to +120 °C, resists mild acids, alkalis and cleaning solvents, ensuring consistent performance across long production cycles.