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CM4 Internal Irrigation Low Speed Air Motor - Self-Lubricating Dental Handpiece

Eliminate handpiece jams and maintenance with the CM4 Internal Irrigation Low Speed Air Motor. Patented self-lubrication doubles lifespan, 50% more wear-resistant blades, and push-button chuck for seamless bur changes. 2/4 hole compatible for universal fit.


  • Order Code: CM4
  • Noise: Less than 60dB
  • Rotation Speed: 20,000rpm
  • Applicable Bur: "E" TYPE CONNECTION
  • Chuck Type: Wrench Type

Product Details

CM5.jpgCM4 Internal Irrigation Low-Speed Air Motor

Self-Lubricating Durability for Uninterrupted Dental Workflows


✨ Why the CM4 Is Your Go-To Low-Speed Motor

Tired of handpieces that jam mid-procedure or demand constant lubrication? The CM4 solves these pain points with our patented self-lubrication system and ultra-wear-resistant blades. It delivers reliable performance, cuts maintenance costs, and lets you focus entirely on patient care.

 Core Advantages That Drive Efficiency

  • Patented Self-Lubricating SystemEliminates the need for frequent lubrication and doubles your handpiece lifespan from the standard 12 months to 12–24 months. Say goodbye to frustrating jams and costly downtime.

  • 50% More Wear-Resistant BladesBuilt with a next-generation friction-resistant material, the motor blades reduce powder buildup and prevent motor seizure, even with heavy daily use.

  • Internal Irrigation DesignDelivers a steady, targeted water flow (90–110 ml/min) directly to the bur tip for optimal cooling, clear visibility, and effective debris removal.

  • Tool-Free Push-Button ChuckSwap between burs, polishers, discs, and reamers in seconds to maintain clinical efficiency.

  • 2-Hole / 4-Hole CompatibilitySeamlessly integrates with your existing dental unit, making it a versatile upgrade for any clinic or lab.

 Technical Specifications

ParameterSpecification
Max Speed20,000 rpm
Air Pressure0.25–0.3 MPa
Water Pressure0.2–0.23 MPa (198 kPa)
Forward Rotation Speed18,000 rpm
Reverse Rotation Speed16,000 rpm
Torque0.4–0.45 N
Compatible Bur SizeΦ2.334–Φ2.355 mm (standard CA burs)
Noise Level≤66 dB (quiet operation)

 Ideal For

General dentistry, prosthodontics, and dental lab applications where reliable low-speed performance is essential. Whether you’re preparing restorations, polishing composites, or adjusting prosthetics, the CM4 is built to handle daily clinical demands.


Upgrade to a handpiece that works as hard as you do—reduce maintenance, boost efficiency, and deliver better patient care with the CM4.


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