Venturi blast nozzle NTC, tungsten carbide, short, 25 mm coarse thread, nozzle bore 3,5 to 8 mm
The Contracor NTC is a compact tungsten carbide blast nozzle with a 45 mm housing diameter and a connection for compatible fine-thread nozzle holders. It is available with several nozzle bore sizes for different air capacities and blasting requirements. Its short design enables precise work while offering good wear resistance.
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| Item no.
10112550
Venturi blast nozzle NTC, tungsten carbide, short, 25 mm coarse thread, nozzle bore 3,5 to 8 mm - 3.5 x 45 is in stock and will be shipped as soon as it is available again
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| Item no.
10112550
Venturi blast nozzle NTC, tungsten carbide, short, 25 mm coarse thread, nozzle bore 3,5 to 8 mm - 3.5 x 45 is in stock and will be shipped as soon as it is available again
Contracor NTC – short Venturi sandblasting nozzle made of tungsten carbide
The Contracor NTC is a compact short Venturi blast nozzle for professional pressure blast systems. With its short overall length of just 45 mm, it is particularly suitable for work with a short nozzle distance, confined work areas and smaller blast surfaces.
The nozzle core made of tungsten carbide (TC) is resistant to mechanical stress and is particularly suitable for mineral abrasives as well as demanding applications on construction sites, in workshops and in industrial surface treatment. The aluminium jacket protects the nozzle core and keeps the design compact.
Your benefits at a glance
✅ Wide blast pattern at a short working distance
✅ Wear-resistant nozzle core made of tungsten carbide
✅ Robust aluminium jacket
✅ Suitable for mechanically demanding applications
✅ Four nozzle bores from 3.5 to 8.0 mm available
✅ 13 mm inlet opening
✅ 1 1/8" UNC coarse thread
✅ Suitable for mobile and stationary pressure blast systems
✅ Fast nozzle change thanks to coarse thread
Technical data
| Feature | Specification |
|---|---|
| Series | NTC |
| Nozzle shape | Short Venturi nozzle |
| Nozzle core | Tungsten carbide (TC) |
| Jacket | Aluminium |
| Thread | 1 1/8" UNC coarse thread |
| Inlet opening | 13 mm |
| Overall length | 45 mm |
| Nozzle bores | 3.5 / 5.0 / 6.5 / 8.0 mm |
Variants, article numbers and air consumption
| Model | Bore | Length | Air consumption at 6 bar* | Article number |
|---|---|---|---|---|
| NTC-3.5 | 3.5 mm | 45 mm | approx. 0.50 m³/min | 10112550 |
| NTC-5.0 | 5.0 mm | 45 mm | approx. 1.10 m³/min | 10112551 |
| NTC-6.5 | 6.5 mm | 45 mm | approx. 2.05 m³/min | 10112552 |
| NTC-8.0 | 8.0 mm | 45 mm | approx. 3.40 m³/min | 10112553 |
*The values are approximate figures at a nozzle pressure of 6 bar. The actual required air volume depends, among other things, on the line cross-section, hose length, pressure losses and the nozzle's state of wear. The compressor should have sufficient capacity reserve.
Short Venturi geometry
The short Venturi geometry is designed for small distances between the nozzle and workpiece. At short distances, it produces a wider blast pattern than a simple nozzle with a straight bore. This makes the NTC particularly suitable for spot work, smaller surfaces, edges, profiles and hard-to-reach areas.
For large, freely accessible surfaces and maximum area coverage, a longer Venturi nozzle is often the better choice.
Suitable abrasives
✔ Garnet sand
✔ Glass beads
✔ Steel grit and steel shot
✔ Mineral reusable abrasives
✔ Other dry, free-flowing abrasives
With highly aggressive abrasives such as white fused alumina or silicon carbide, tungsten carbide wears significantly faster than boron carbide. For such applications, it should be considered whether a boron carbide nozzle would be more economical.
Choosing the right nozzle bore
As the bore diameter increases, blasting performance, air demand, and abrasive consumption increase. The nozzle size must therefore match the available compressor capacity, the internal diameter of the blast hose, and the desired work performance.
✔ 5.0 mm: compact blasting systems and general cleaning work
✔ 6.5 mm: professional mobile applications with medium area coverage
✔ 8.0 mm: higher blasting performance with a correspondingly powerful compressor
Typical applications
✔ Processing edges, profiles, and weld seams
✔ Surface preparation before painting and coating
✔ Repair and maintenance work
✔ Mobile blasting work on construction sites
✔ Metalworking, mechanical engineering, and plant construction
✔ Workshop and industrial operations
Installation and compatibility
The NTC has a 1 1/8"-UNC coarse thread and a 13 mm inlet opening. Before ordering, check that the existing nozzle holder matches this thread and the nozzle inlet size exactly.
An intact, suitable nozzle seal must be fitted between the nozzle and nozzle holder. A damaged or missing seal can cause air and abrasive leakage and damage the nozzle holder.
Maintenance and safety
✔ Check the nozzle for cracks and damage before every use
✔ Keep the seal and thread clean
✔ Install or replace only when the system is completely depressurized
✔ Use only suitable nozzle holders
✔ Properly ground the blasting system
✔ Use the required respiratory and blast protection equipment
A worn nozzle bore significantly increases air and abrasive consumption. Even a slight increase in diameter can prevent the available compressor from reaching the required nozzle pressure.
FAQ – frequently asked questions
What thread does the Contracor NTC have?
The nozzle has a 1 1/8"-UNC coarse thread.
How long is the NTC?
All four variants have an overall length of 45 mm.
What inlet opening does the nozzle have?
The inlet opening is 13 mm.
Which nozzle bores are available?
The NTC is available with 3.5, 5.0, 6.5, and 8.0 mm bores.
Is the NTC suitable for large areas?
It can be used for this purpose, but due to its short design, it is primarily intended for short working distances and smaller or hard-to-reach areas. For maximum area coverage, a long Venturi nozzle is generally recommended.
How can I tell if a nozzle is worn?
Typical signs include an enlarged or irregular bore, increased air consumption, reduced nozzle pressure, and an uneven blast pattern.
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