Product Overview: ST-NN400
The ST-NN400 (Active Clamping) is a reliable pneumatic underpinner designed for professional frame joining. Featuring an Active Downward Clamping System and CNC precision control, it delivers consistent, high-quality joints for various materials from delicate foam to hardwood.
Core Features: Reliability with NN400 Active Clamping
- Active Downward Clamping System
The NN400 utilizes a robust pneumatic cylinder to apply vertical pressure directly onto the frame corner. This “Active Clamping” ensures the moulding stays perfectly flat against the table during nailing, preventing any lifting or shifting. - CNC Precision Control
Although it operates without a large touchscreen, the built-in CNC system allows you to program precise nail spacing and positions. It supports over 100 stored configurations for quick recall. - High-Efficiency Stacking
Capable of 5-nail stacking and 9-row synchronized nailing in a single cycle. This allows for deep penetration and strong joints on tall or hardwood frames. - Multi-Material Ready
The adjustable pressure settings make it versatile for working with various materials, from delicate foam and gypsum to hard solid wood and MDF.
Technical Specifications
| Specification | Details |
|---|---|
| Model | ST-NN400 (Active Clamping) |
| Machine Type | Pneumatic Underpinner / V-Nailer |
| Clamping Method | Active Downward Pressure |
| Max Frame Width | 130mm (13cm) |
| Max Frame Thickness | 100mm (10cm) |
| V-Nail Sizes | 5mm, 7mm, 10mm, 12mm, 15mm |
| Air Pressure | 6-8 kg/cm² (90-120 psi) |
| Net Weight | 90-100 kg |
Frequently Asked Questions (FAQ)
Q: What is the main difference between NN400 and NN500?
A: The NN400 is the standard model with button/digital controls, while the NN500 adds a full LCD Touchscreen. If you don’t need a visual touch interface but want the same powerful “Active Clamping” performance, the NN400 is the most cost-effective choice.
A: The NN400 is the standard model with button/digital controls, while the NN500 adds a full LCD Touchscreen. If you don’t need a visual touch interface but want the same powerful “Active Clamping” performance, the NN400 is the most cost-effective choice.
Q: Why is “Active Clamping” important?
A: Active Clamping applies downward force to hold the frame pieces firmly. This is crucial for joining warped wood or complex profiles, ensuring the corner remains tightly closed while the V-nail is driven in from below.
A: Active Clamping applies downward force to hold the frame pieces firmly. This is crucial for joining warped wood or complex profiles, ensuring the corner remains tightly closed while the V-nail is driven in from below.
Q: Can I stack nails with this machine?
A: Yes, the NN400 supports multi-stacking V-nails (up to 5 per position), which is essential for ensuring the structural integrity of tall or heavy frames.
A: Yes, the NN400 supports multi-stacking V-nails (up to 5 per position), which is essential for ensuring the structural integrity of tall or heavy frames.



