Description
FAG HCS7011-C-T-P4S-UL — Sealed Hybrid Ceramic Super-Precision Spindle Bearing
Sealed Hybrid Ceramic Super-Precision Spindle Bearing from FAG’s super-precision range, for grinding, milling and high-speed machine-tool spindles where running accuracy and maintenance-free operation are required. Universally matchable for paired or multi-bearing arrangements. Sold per bearing — order the quantity your arrangement requires.
Specifications
- Brand: FAG
- Designation: HCS7011-C-T-P4S-UL
- Type: Sealed Hybrid Ceramic Super-Precision Spindle Bearing
- Bore (d): 55 mm
- Outside diameter (D): [confirm from datasheet] mm
- Width (B): [confirm from datasheet] mm
- Ball material: Silicon nitride (Si₃N₄) ceramic
- Contact angle: 15°
- Precision class: P4 (≈ ABEC 7) — restricted spindle tolerances
- Preload: light, universal matching
- Cage: machined phenolic-resin cage
- Sealing: Sealed both sides, grease-filled for life
Suffix breakdown — what you are actually buying
- Hybrid ceramic — Si₃N₄ ceramic balls in steel rings: ~40% lighter and harder than steel, cutting centrifugal load at high n·dm for higher speed, lower heat and longer life, and electrically insulating the bearing against VFD/motor bearing currents (fluting).
- Sealed — integrated seals retain the for-life grease charge and exclude coolant mist and swarf, removing the relubrication interval and protecting the raceways in contaminated CNC environments.
- 15° contact angle — favours higher speed and lower heat; the common choice for the floating spindle position.
- Machined phenolic-resin cage — low mass and quiet at speed; the standard for high-speed spindle service.
- P4 — ISO precision class (≈ ABEC 7) with restricted running tolerances for low radial and axial runout and repeatable concentricity.
- light preload, universal matching — mounts in DB/DF/DT arrangements to the designed preload when clamped.
- Full designation — supplied and verified exactly as specified: HCS7011-C-T-P4S-UL.
What this means on the spindle
- Higher speed, cooler running: lighter ceramic balls cut centrifugal load and heat, lifting the speed ceiling versus an equivalent steel bearing.
- Electrical insulation: ceramic balls block inverter-driven motor bearing currents, preventing fluting and premature failure.
- High rigidity: defined contact angle and preload hold the shaft against axial and radial cutting forces, protecting tolerance under load.
- Low runout: super-precision running accuracy keeps concentricity tight for surface finish and tool life.
- Long service life: sealed for-life grease, ceramic balls and precision raceways extend service intervals and reduce failures.
10+ Years FAG Bearing Specialist Support
Every order is checked by a specialist with over a decade in FAG precision bearings. Send us the full designation and we will verify every prefix and suffix — contact angle, cage, precision class, preload and sealing — so the part you receive is an exact match for your spindle, not an approximate substitute. FAG, INA (Schaeffler Group), SKF, NSK and IBC references are supplied as 100% genuine product, with documentation available on request and express cross-border shipping to the UK and EU.