Product Name:
Precision Alumina Ceramic Shaft Plug & Sleeve Set
Product Material:
99.5% - 99.8% High-Purity Alumina (Al_2O_3), Optional Toughened Alumina (ZTA) for high-impact loads.
Material Characteristics:
Extreme surface hardness (Vickers 1500+ HV), Low coefficient of friction (Self-lubricating when polished), Zero thermal expansion distortion, Outstanding corrosion resistance, High dielectric strength, Exceptional wear life in abrasive media.
Application Fields:
Centrifugal pump shaft sleeves, Micro-motor ceramic bearings, High-speed rotating unions, Valve stem plugs, Metering pump plungers and cylinders, Fluid dispensers, Chemical mixers.
Application Industries:
Biomedical (Dialysis and blood pumps), Advanced Machinery (Precision spindles), New Energy (Lithium battery slurry pumps), Fluid Control (High-frequency valves), Electronic Engineering (Cooling pumps), Aerospace (Hydraulic actuators), Petrochemical (Corrosive fluid handling), Broad Semiconductor (Slurry delivery systems).
Processing Difficulties:
Achieving micron-level clearance fit (H7/g6) between the plug and sleeve, Maintaining perfect concentricity and cylindricity to prevent seizing, Controlling surface roughness ($Ra < 0.1\mu m$) to minimize seal friction, Managing brittle edge chipping during high-precision internal grinding.
Processing Flow:
Nano-powder preparation → Isostatic pressing (CIP) → Green body precision machining → High-temperature sintering → Diamond internal/external cylindrical grinding → Honing and mirror polishing → Clearance matching and verification → Ultrasonic cleaning → Final inspection and assembly.
Delivery Period:
Standard precision sets: 20-35 days, Ultra-precision customized sets: 40-55 days.
This Alumina Ceramic Shaft Plug and Sleeve Set is designed for high-performance fluid systems where metal components fail due to galling, corrosion, or rapid wear. By utilizing the extreme hardness of 99.7% Alumina, our sets maintain critical clearances even in the presence of abrasive particulates. The precision-matched fit between the plug and the sleeve ensures nearly leak-free operation without the need for traditional lubricants, making it ideal for pharmaceutical and food-grade applications. These components provide a stable, long-life solution that significantly reduces maintenance cycles and improves overall system reliability.
Key Features:
Micron-Precision Fit: Engineered with ultra-tight tolerances to ensure smooth motion and minimal bypass leakage.
Superior Wear Resistance: Eliminates the "grooving" common in metal sleeves, extending the life of mechanical seals.
Corrosion Immunity: Completely resistant to oxidation, salt spray, and aggressive industrial chemicals.
Thermal Stability: Maintains precise dimensions and fitment across a wide temperature range (25^\circ C to 1600^\circ C).
Self-Lubricating Properties: Highly polished surfaces minimize frictional torque and energy consumption.
