Dental micromotors are primarily made of stainless steel, aluminum alloy, engineering plastics, and high-performance metals such as 440C martensitic stainless steel. These materials are used for the motor housing, bearings, and internal precision components to meet the stringent requirements of dental medical devices for corrosion resistance, high speed, easy sterilization, and stability.
Housing Materials: Stainless steel and aluminum alloy are common choices. Stainless steel bodies (such as those with ISO standard E-type interfaces) offer excellent high-temperature and corrosion resistance, facilitating repeated high-temperature sterilization and making them suitable for clinical environments. Aluminum alloy housings are lightweight and have good heat dissipation, but their mechanical strength is relatively lower.
Bearing Materials: High-end dental motors use 440C martensitic stainless steel or hybrid ceramic bearings (such as silicon nitride ceramic balls), with a hardness of HRC58-62, capable of withstanding extreme speeds up to 450,000 rpm, while achieving low-friction, low-wear, and grease-free operation, suitable for high-precision instruments such as dental drills.
Internal motor structure: Some models adopt a coreless or brushless design, using a combination of permanent magnets and precision coils to improve efficiency and reduce heat generation, making them suitable for long-term continuous operation.
