CE--6317-ZZPT

CE-6317-ZZPT is a high-precision full ceramic bearing featuring ZrO₂ (zirconia) rings and balls with a PTFE (polytetrafluoroethylene) cage. ZrO₂ bearings utilize high strength, corrosion resistance, and low friction, making them ideal for harsh environments. They outperform steel bearings in wear resistance and can operate without lubrication. The PTFE cage provides exceptional chemical resistance and low friction, further enhancing the bearing's performance in aggressive media. Commonly found in medical, aerospace, and high-speed applications, they ensure durability and precision under extreme conditions. The ZZ metal shields provide effective contamination protection.

◆ Basic Dimensions and Weight

Model CE-6317-ZZPT (standard 6317 series). Dimensions in mm, weight in kg.

Mounting dimensions: da min = 97 mm, Da max = 168 mm, ra max = 3.0 mm.
   Reference weight: ~3.15 kg (ZrO₂ full ceramic).

◆ Material and Design

● Rings & Balls – ZrO₂ (Yttria-Stabilized Zirconia) – Sintered advanced ceramic with ≥94% ZrO₂ + Y₂O₃ stabilizer. Density ~6.0 g/cm³, Vickers hardness 1250–1350 HV10, flexural strength ≥1000 MPa. Thermal expansion coefficient 10.3×10⁻⁶/K (matches steel), dielectric strength >15 kV/mm, non-magnetic, non-conductive.

● Cage – PTFE (Polytetrafluoroethylene) – High-performance fluoropolymer offering the lowest coefficient of friction of any solid material (0.04–0.10). Provides exceptional chemical resistance to virtually all acids, alkalis, and solvents. Temperature range: -70°C to +260°C continuous. PTFE cages reduce friction, minimize wear, and eliminate lubrication requirements in many applications.

● Shields – ZZ (Metal Shields, Both Sides) – Non-contact metal shields protect the bearing from contamination while allowing high-speed operation. The ZZ designation indicates shields on both sides, providing effective protection against particulate ingress while maintaining low running torque.

◆ Core Performance Advantages

● High Strength & Durability – ZrO₂ ceramic offers exceptional mechanical strength and fracture toughness, ensuring long service life under demanding conditions.

● Corrosion & Chemical Resistance – Resists acids, alkalis, solvents, and seawater. The PTFE cage further enhances chemical resistance, making this bearing suitable for the most aggressive environments.

● Low Friction & Wear Resistance – Outperforms steel bearings in wear resistance, with low friction coefficient (0.05–0.12). The PTFE cage provides the lowest possible cage friction, reducing energy loss and heat generation.

● Extreme Temperature Range – Operates from -200°C to +600°C (rings/balls) and up to +260°C for PTFE cage. Low thermal expansion ensures stable clearances across temperature variations.

● High-Speed Capability – Lower density reduces centrifugal forces, enabling speeds up to 1.5× that of steel bearings. The PTFE cage minimizes friction and allows smooth operation at high rotational speeds.

● Electrical Insulation – Non-conductive and non-magnetic, preventing arcing damage in motors, generators, and electromagnetic-sensitive equipment.

● Maintenance-Free Operation – Operates without lubrication in vacuum, cleanroom, and high-temperature environments, reducing maintenance costs.

◆ Application Areas

● Chemical & Food Processing – Pumps, agitators, mixers – ZrO₂ rings and PTFE cage provide exceptional corrosion resistance to aggressive chemicals.

● Medical Equipment – Surgical handpieces, CT scanners, centrifuges – biocompatible and lubrication-free.

● Aerospace – Actuators, gyroscopes, flight controls – lightweight, extreme temperature reliability.

● High-Speed Spindles – CNC, PCB drilling, grinding spindles – high rotational speeds and precision.

● Semiconductor & Cleanroom – Vacuum robots, wafer handling – particle-free, non-magnetic, non-conductive.

● Laboratory Instruments – Centrifuges, precision measurement equipment – high accuracy and chemical resistance.

◆ Technical Data