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Technical parameter of High Speed Dental Handpiece Drill Bearing
Meterial: inner and outer ring-Stainless rings 440c
Base: Ceramic SI3N4
Cage: Torlon PAI(polyamide-imide)
Speed: 350000-400000r/min under the air-pressure of 200-250Kpa
Working life: about six month
Tolerance grade of super precision: ABEC-7
Characteristics: Corrision resistance, high temperature resistance, low noise and low vibriation level, weak acid resistance , weak base resistance
Bearing type: Radial bearings, angular contact ball bearing

| Bearing Part | Material | Characteristics |
| Outer ring | Refined Stainless Steel 9Cr18Mo (AISI440C) |
Antirust, Corrosion resistant, Hardness of Freezing Treatment |
| Inner ring | Refined Stainless Steel 9Cr18Mo (AISI440C) |
Antirust, Corrosion resistant, Hardness of Freezing Treatment |
| Shield | Refined Stainless Steel | Corrosion resistant, Antirust |
| Ball | Refined Stainless Steel 9Cr18Mo | Antirust, Corrosion resistant |
| Super-hard Ceramic Si3N4 | Abrasion resistant, Corrosion resistant |
|
| Cage | Torlon | High strength, Ant-fraying, Self-lubricating |
| Polyamide-imide | High strength, Ant-fraying, Self-lubricating |
|
| Textolite (Phenolic) | High strength, Ant-fraying, Self-lubricating |
