SR144TLKZN Precision High-Speed Bearing for Dental Handpiece
SR144TLKZN is a high-precision angular contact ball bearing specifically designed for dental handpiece (dental drills), ensuring stable and high-speed operation of the dental drill.
Item No :
SR144TLKZNSize (d*D*B) :
3.175x6.35x2.38mmMaterial :
Stainless steel 440C + Si3N4 ceramic ballsLead Time :
3-5 workdaysSR144TLKZN Precision High-Speed Bearing for Dental Handpiece
⚙️material configuration:
Main body and rolling elements: The inner and outer rings of the bearing are made of refined stainless steel 440C, which has excellent corrosion resistance and structural strength; the rolling elements are made of Si3N4 (nitride silicon) ceramic beads, with a Rockwell hardness of over HRA90, and have extremely low friction coefficients, which can effectively reduce wear and temperature rise during high-speed operation, and prevent lubrication failure.
Cage: Made of Torlon (special polyimide) material, this material can work for a long time at 260℃, with superior creep resistance performance far exceeding that of ordinary materials, ensuring the structural stability of the bearing during long-term high-frequency vibration and ultra-high-speed operation, and extending its service life.
Sealing structure: Adopt a single-side metal sealing design, combined with specific sealing forms, to prevent water vapor, debris, and other impurities from entering the bearing during oral diagnosis and treatment, ensuring the stability of its operation.
⚙️Technical Parameters:
| Specification Category | Item | Details |
| Basic Information | Product Model | SR144TLKZN |
| Product Type | High-End Dental High-Speed Handpiece Bearing | |
| Bearing Structure | Angular Contact Ball Bearing | |
| Dimension Parameters | Inner Diameter (d) | 3.175 mm (1/8") |
| Outer Diameter (D) | 6.35 mm (1/4") | |
| Width (B) | 2.38 mm (3/32") | |
| Material Configuration | Inner/Outer Ring | Precision Stainless Steel (440C) |
| Rolling Elements | Silicon Nitride (Si3N4) Ceramic Balls | |
| Cage Material | Torlon (Special Polyimide) | |
| Seal Structure | Single-Side Metal Shield (Z-Type) | |
| Performance Parameters | Precision Class | ABEC-7 |
| Limiting Speed | 400,000 rpm (under rated working conditions) | |
| Radial Runout | ≤ 5 μm | |
| Temperature Rise | ≤ 15 ℃ (at maximum speed) | |
| Sterilization Resistance | ≥ 200 High-Temperature & High-Pressure Sterilization Cycles | |
| Torque Change Rate | ± 8% of Initial Value (after sterilization cycles) | |
| Application Scope | Adaptation Equipment | High-Speed Dental Handpieces |
| Clinical Applications | Tooth Grinding, Cavity Preparation, Dental Restoration, Implant Site Preparation |
Low power consumption and stable temperature: The combination of ceramic beads and special cages significantly reduces operating friction. Even at an ultra-high speed of 400,000 revolutions per minute, the temperature rise can be controlled within a low range (for some products, the temperature rise does not exceed 15°C), avoiding the impact on the diagnostic experience or damage to the bearings due to high temperatures.
Durable and reliable: After undergoing precise heat treatment processes and 72-hour continuous running-in tests, etc., under normal operating conditions, the service life is longer, and it can withstand more than 200 high-temperature and high-pressure sterilization cycles. The torque variation rate remains within ±8% of the initial value, meeting the usage requirements of frequent sterilization of dental instruments.
Precise operation: Through micro-metric precision processing, the radial runout can be stable within 5 μm, reducing the oscillation of the dental drill needle, especially suitable for high-precision dental surgeries such as cavity preparation for dental implants, and reducing operational errors.
| dental drill bearing series | ||
| Size: Bore: 3.175(0.125) OD:6.35 (0.250) width: 2.38(0.0937) |
Feature | ITEM |
| Smooth | SR144TL | |
| SR144TLZ | ||
| SR144TLN | ||
| SR144TLZN | ||
| Flanged | SFR144TL | |
| SFR144TLZ | ||
| SFR144TLN | ||
| SRF144TLZN | ||
| Stepped | SR144TLK | |
| SR144TLKZ | ||
| SR144TLKN | ||
| SR144TLKZN | ||
| Size: Bore: 3.175(0.125) OD:6.35 (0.250) Width: 2.78(0.1094) |
Feature | ITEM |
| Smooth | SR144TLW | |
| SR144TLZW | ||
| SR144TLNW | ||
| SR144TLZNW | ||
| Flanged | SFR144TLW | |
| SFR144TLZW | ||
| SFR144TLNW | ||
| SRF144TLZNW | ||
| Flanged Unique | SFR144TLGW | |
| SFR144TLGZW | ||
| SFR144TLGNW | ||
| SRF144TLZGNW | ||
| Stepped | SR144TLKW | |
| SR144TLKZW | ||
| SR144TLKNW | ||
| SR144TLKZNW | ||
This bearing is widely used in various dental treatment procedures in clinical dentistry, such as tooth grinding, cavity preparation, and dental restoration. Its stable performance can significantly reduce the vibration and noise of the instruments during the treatment process, thereby improving the accuracy of the doctor's operation and alleviating the discomfort of the patient. It has been adapted to multiple domestic and foreign dental mobile phones and has entered the equipment supply chain of many top dental institutions.
| 1. Keep clean | 2. Use with caution | 3. appropriate tool | 4. Hot-loading | 5. Be careful of rust |
| Dust will have a bad effect on the bearing, so keep the surrounding clean. | Strong impact during use can easily cause scratches and indentations. | Avoid replacing existing tools, and use appropriate tools. | Bearings are precision parts, so hot installation is recommended. | Sweat on your hands during operation will cause rust, so it is best to wear gloves. |
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