High-Precision Silicon Nitride Ceramic Stepped Shaft - Advanced Transmission Solution Engineered for Demanding Applications

Product Overview

This stepped shaft, manufactured from high-purity silicon nitride ceramic material, represents a pinnacle achievement in modern industrial ceramic technology. The product features a deep black coloration with a specially processed surface that exhibits a fine, uniform matte texture, smooth to the touch and completely free of surface imperfections. Its innovative stepped shaft design precisely integrates a large-diameter pressure-bearing head, an equal-diameter transmission body, and a precision small-diameter end, creating a perfect mechanical verification and functional distribution system. Each diameter transition zone incorporates optimized arc designs that effectively eliminate stress concentration, ensuring reliability in extreme operating conditions.

Core Features & Advantages

• Exceptional Mechanical Performance: Flexural strength ≥750MPa, compressive strength ≥2500MPa, capable of withstanding extreme dynamic loads

• Superior Wear Resistance: Vickers hardness HV≥1700, friction coefficient below 0.1, service life exceeds 10 times that of premium bearing steel

• Outstanding Thermal Stability: Operating temperature range -196℃ to 1300℃, thermal expansion coefficient as low as 3.1×10⁻⁶/K

• Perfect Dimensional Stability: Dimensional change rate less than 0.02% under severe temperature fluctuations

• Optimized Structural Design: Diameter tolerances strictly controlled within ±0.003mm, roundness error ≤0.001mm

Typical Applications

• High-End Precision Machine Tools: High-speed motorized spindle transmission shafts, precision coordinate grinding machine positioning shafts

• Semiconductor Manufacturing Equipment: Vacuum robotic arm transmission shafts, wafer aligner precision shaft cores

• Aerospace Sector: Aircraft engine sensor shafts, spacecraft guidance mechanism transmission shafts

• New Energy Equipment: Fuel cell compressor rotor shafts, wind power equipment speed measurement shafts

Technical Specifications

Manufacturing Process

Ultra-high purity powder selection → Nanoscale dispersion treatment → Precision isostatic pressing → Atmosphere-protected high-temperature sintering → Multi-station CNC precision grinding → Ultra-precision polishing → Laser geometric measurement → Ultrasonic flaw detection → Clean room packaging → Vacuum shock-proof packaging

Usage Guidelines

1. Use specialized hydraulic installation tools to ensure even axial force distribution

2. Recommended interference fit of 0.002-0.006mm when mating with bearings

3. Operating temperature change rate should be controlled within ≤150℃/minute

4. Recommended inspection of journal surface condition every 500 operating hours

5. Use specialized ceramic cleaners, avoid scraping with metal tools

Service & Support

• 24-month extended quality guarantee period

• Complete product lifecycle tracking files

• Professional technical team providing installation guidance

• 2-hour emergency response mechanism

• Regular equipment operation status analysis reports

FAQ

Q: What is the dynamic balance performance under high-speed rotation conditions?
A: Through precision dynamic balance correction, residual unbalance is less than 0.5g·mm/kg, ensuring smooth operation at 20,000 rpm

Q: Do you support customization of special sizes and precision grades?
A: Full customization available, maximum processing length 500mm, diameter range 3-80mm, highest precision up to IT4 grade

Q: How is the durability in strong corrosive environments?
A: Annual corrosion depth less than 0.01mm in pH 1-13 corrosive media, strength retention rate ≥95%

We are a company with many years of experience in the production of special precision ceramics and the ability to design, manufacture, process and sell structural and functional parts of various special precision ceramics.

Deyu Precision Ceramics Technology Co., Ltd. has many years of experience in producing special precision ceramics, and has the ability to design, manufacture, process and sell structural and functional parts of various special precision ceramics. At present, the company has production and processing equipment such as dry press, isostatic press, experimental furnace, flat kiln, machining center, surface grinder, universal internal and external grinder, centerless grinder and laser cutting machine, as well as complete high-precision testing equipment such as high-precision projector, three-dimensional tester, metallographic microscope, hardness tester and densitometer.

With advanced production technology and complete production facilities, the company is one of the few domestic enterprises that can produce special precision ceramic structural parts and functional parts with machining accuracy less than 2 microns, and has strong core competitiveness in the same industry in China.

Advantages of the company: 1. National new technology enterprises; 2. The company has a municipal R&D center; 3. Cooperation with domestic key universities and research institutes; 4. Design, molding, sintering and precision processing; 5. The products cover alumina, zirconia, silicon nitride, silicon carbide and other precision ceramics; 6. Precision plus technology.

The company has always been standing in the position of customers to solve problems, focusing on the principle of quality and delivery time, adhering to the business philosophy of "integrity, innovation and reassurance", and sincerely looking forward to cooperating with you.