Cutting tool・tooling

NAKASEIKI

🔩 NPC-3RSS-28 – Hollow-Mount Pneumatic Chuck with Wedge Mechanism
Compact. Precise. Long-Stroke. Ideal for Automated Machining.
The NPC-3RSS-28 is a compact pneumatic chuck designed for high-precision gripping in automated machining environments. Featuring a wedge-type mechanism with dual fingers and a long stroke, it offers reliable seating confirmation and efficient chip/coolant evacuation through its hollow body.

⚙️ Key Features
- 🧩 Wedge Mechanism – 3 inch / 2 fingers
→ Ensures stable and synchronized gripping force
- 📏 Long Stroke – φ8 mm
→ Suitable for gripping a wide range of workpiece sizes
- 🌀 Through-Hole Design (φ8 mm)
→ Enables seating confirmation and allows coolant/chip evacuation
- 🔄 Dual Side Air Port Configuration

- Simplifies pneumatic connection and integration

📐 Technical Specifications
| Item | Value |
| Model | NPC-3RSS-28 |
| Repeatability Accuracy | ±0.01 mm |
| Number of Fingers | 2 |
| Finger Stroke | φ8 mm |
| Mounting Hole Pitch | P.C.D 70 mm |
| Front Mounting Bolts | M5 × 4 positions |
| Body Mounting Fit (ID × Depth) | φ50 +0.05/0 × 2 mm |
| Operating Medium | Compressed Air |
| Operating Pressure | 0.15 – 0.6 MPa |
| Body Material | Aluminum |
| Weight | 1250 g |
| Max Allowable RPM | – |
| External Gripping Force (Calc.) | 226 N @ 0.1 MPa |
🧠 Integration Benefits
- ✅ Ideal for CNC machines, rotary tables, and automated inspection systems
- ✅ Hollow body supports real-time seating confirmation
- ✅ Compact and lightweight for easy mounting
- ✅ CAD and PDF documentation available for download

✨ NPC-3RSS-28 – A smart gripping solution for precision machining, combining compact design, long stroke, and reliable performance.