Description
A slow-speed handpiece by NSK (Nakanishi) is a dental instrument designed to operate at lower rotational speeds compared with high-speed turbines. It’s used for procedures requiring high torque and controlled movement rather than rapid cutting, such as:
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Prophylaxis (polishing)
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Adjusting prosthetics
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Endodontic file use
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Slow drilling and finishing work
NSK is a well-known manufacturer of high-quality dental handpieces and micromotors, known for durability and smooth performance.
🔧 Key Characteristics
Speed & Torque
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Typical low-speed range: around 22,000-30,000 rpm depending on model and configuration.
Handpiece Types
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Contra-angle handpiece: Angled head for easier access to posterior areas.
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Straight handpiece: Straight design, often used with prophy angles.
Drive & Connection
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Usually air-driven via a low-speed air motor (E-type connection with 2-hole or 4-hole hoses).
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Can be push-button or latch type for securing burs.
Autoclavability
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Handpiece and contra angle are typically autoclavable at up to ~135°C, which makes them suitable for repeated sterilization.
Bur Compatibility
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Accepts 2.35 mm shank burs, including latch-type burs and contra-angle attachments.
🛠️ Common Specifications
| Feature | Typical Specification |
|---|---|
| Rotation Speed | ~22,000–30,000 rpm (max) |
| Drive Type | Air-driven via micromotor |
| Connection | ISO standard E-type (2-hole/4-hole) |
| Chuck Type | Push-button or latch |
| Autoclavable | Yes (~135 °C) |
| Compatible Burs | 2.35 mm shank burs (CA burs) |
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