Description

JOSOI Sunlight Medium-Head High-Speed Handpiece

• Brand: JOSOI — professional high-speed dental handpiece for routine clinical procedures
• Medium-head design for balanced access, visibility, and cutting stability
• Double-curved-line exterior design for a smooth, professional appearance
• Triple water spray cooling system for efficient temperature control during high-speed cutting
• Metal body structure for durability and repeated clinical sterilization
• Push-button bur release for quick and convenient bur replacement
• Available with 2-hole and 4-hole connection interfaces
• 320,000–350,000 RPM high-speed turbine performance
• Low operating noise level of ≤60 dB
• Compatible with Φ1.595–1.600 mm standard dental burs
• Supports 135°C high-temperature autoclave sterilization

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Description

The JOSOI Sunlight Medium-Head High-Speed Handpiece is designed for dental professionals who need stable high-speed cutting performance, balanced intraoral access, and reliable cooling during daily clinical procedures.

This model features a medium-head structure, double-curved-line exterior design, triple water spray cooling system, metal body, and push-button bur release. The medium-head design provides a practical balance between cutting stability and access, making the handpiece suitable for cavity preparation, crown reduction, restorative adjustment, margin refinement, and other routine dental treatments.

The triple water spray system directs cooling water toward the bur and cutting area from three directions. This helps reduce heat buildup during high-speed operation and improves debris removal from the operative field. With a working air pressure of 0.22–0.25 MPa and a rotational speed of 320,000–350,000 RPM, the JOSOI Sunlight Medium-Head High-Speed Handpiece delivers efficient performance for modern dental clinics.

The handpiece also includes a durable metal body, 2-hole / 4-hole connection options, and 135°C high-temperature autoclave compatibility, supporting repeated daily use and standard clinical sterilization workflows. Product specifications are based on the uploaded product document.

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Feature

• The medium-head design provides a balanced clinical structure, offering stable cutting performance while maintaining practical intraoral access.
• The double-curved-line exterior gives the handpiece a smooth and professional appearance, suitable for modern dental clinic environments.
• The triple water spray cooling system delivers water from three directions around the bur, helping reduce heat buildup during high-speed cutting.
• The multi-directional spray pattern helps flush away tooth debris and restorative particles, supporting a cleaner and more visible operative field.
• The metal body provides structural strength, durability, and resistance to repeated cleaning and sterilization cycles.
• The push-button bur release allows fast bur replacement without additional tools, improving chairside efficiency and simplifying workflow.
• The 2-hole and 4-hole connection options provide compatibility with common dental unit interfaces.
• The 320,000–350,000 RPM speed range supports efficient cutting performance for routine restorative and prosthodontic procedures.
• The low noise level of ≤60 dB helps create a more comfortable operating environment for both patients and dental professionals.

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JOSOI Sunlight Medium-Head High-Speed Handpiece — Specifications

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Working Principle

The JOSOI Sunlight Medium-Head High-Speed Handpiece operates through a pneumatic turbine system. Compressed air enters the handpiece through the 2-hole or 4-hole connection interface and drives the internal turbine rotor. Under the recommended working air pressure of 0.22–0.25 MPa, the turbine reaches a rotational speed of 320,000–350,000 RPM.

The dental bur is secured by the push-button chuck mechanism. When the turbine rotates at high speed, the bur performs cutting, preparation, or adjustment on tooth structure and restorative materials. The medium-head design helps provide balanced access and stable cutting performance during routine clinical operation.

The triple water spray system delivers cooling water from three outlets around the head. This cooling water is directed toward the bur and cutting zone to reduce thermal buildup, cool the bur and tooth surface, and flush away cutting debris. By supplying water from multiple directions, the handpiece supports safer and cleaner high-speed cutting.

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Clinical Practice of the JOSOI Sunlight Medium-Head High-Speed Handpiece

1. Pre-Operative Setup

• Inspect the handpiece body, medium head, spray outlets, connection interface, and external surface before use.
• Confirm that the selected dental bur has a shank diameter of Φ1.595–1.600 mm.
• Insert the bur fully into the chuck and confirm secure bur retention before operation.
• Connect the handpiece to the appropriate 2-hole or 4-hole dental unit interface.
• Confirm that the working air pressure is within the recommended range of 0.22–0.25 MPa.
• Run the handpiece unloaded for several seconds before intraoral use to check turbine rotation, triple water spray output, operating sound, and bur stability.
• Make sure all three spray outlets provide stable water flow before beginning clinical cutting.

2. Intraoperative Management

• Use the handpiece for routine high-speed procedures such as cavity preparation, crown reduction, restorative adjustment, margin refinement, and occlusal adjustment.
• Maintain light and controlled cutting pressure. Excessive pressure may reduce turbine speed, increase heat generation, and shorten bearing life.
• Keep the triple water spray active throughout cutting to reduce thermal buildup and improve debris clearance.
• Use the medium-head structure to balance visibility and cutting stability during general restorative procedures.
• Adjust the handpiece angle carefully while maintaining continuous cooling at the cutting area.
• Monitor the operating sound during use. Normal operation should remain at or below 60 dB.
• Stop operation immediately if abnormal vibration, unstable bur rotation, reduced water spray, loose bur retention, or unusual noise occurs.
• Replace the bur only after the turbine has fully stopped.

3. Post-Operative Maintenance

• Remove the bur after the procedure using the push-button release.
• Flush the handpiece air and water lines after use to remove residual water, debris, and contaminants.
• Clean the external surface of the handpiece, especially around the head, spray outlets, and connection interface.
• Check the three spray outlets regularly to prevent blockage and maintain balanced cooling performance.
• Lubricate the handpiece according to the manufacturer’s maintenance protocol before sterilization.
• Sterilize the handpiece using 135°C high-temperature autoclave sterilization.
• After sterilization, allow the handpiece to dry completely before storage or reuse.

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The Function of the JOSOI Sunlight Medium-Head High-Speed Handpiece

The JOSOI Sunlight Medium-Head High-Speed Handpiece is used for high-speed dental cutting in routine clinical procedures. Its main function is to drive standard dental burs at 320,000–350,000 RPM for cavity preparation, crown preparation, restorative adjustment, occlusal reduction, and other procedures requiring efficient removal of tooth structure or restorative material.

The medium-head design provides a practical balance between cutting stability and clinical access. It is suitable for general restorative procedures where clinicians need dependable performance without using an oversized head structure.

The triple water spray cooling system plays an important role in temperature control. During high-speed operation, friction between the bur and tooth surface can quickly generate heat. The three-directional spray helps cool the bur and tooth surface while washing away debris, supporting safer and cleaner operation.

The metal body provides durability for repeated daily use, while the push-button bur release supports fast bur changes and efficient chairside workflow. Combined with 2-hole / 4-hole connection options and 135°C autoclave sterilization compatibility, this handpiece is a practical instrument for modern dental clinics.

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Important Notes for Using the JOSOI Sunlight Medium-Head High-Speed Handpiece

1. Always confirm that the working air pressure is within 0.22–0.25 MPa before operation.
2. Use only burs with a shank diameter of Φ1.595–1.600 mm.
3. Do not operate the handpiece without a bur properly installed.
4. Always keep water spray active during cutting to reduce heat buildup.
5. Check all three water spray outlets regularly. Blocked outlets may reduce cooling efficiency and affect cutting safety.
6. Do not press the push-button bur release while the turbine is still rotating.
7. Allow the turbine to fully stop before removing or replacing the bur.
8. Clean the head area, spray outlets, connection interface, and external surface carefully after each use.
9. Lubricate the handpiece according to the recommended maintenance procedure before sterilization.
10. Sterilize the handpiece at 135°C using high-temperature autoclave sterilization.
11. After sterilization, inspect the handpiece for abnormal noise, vibration, reduced spray output, loose bur retention, or visible damage before returning it to clinical use.