Product Name: High-Pressure Waterjet Nozzle Tube (3/8″ Connection, 12.0″ Nominal) – Part No. 05013735

Description:
This component is a high-pressure (HP) nozzle tube, also known as a focusing tube or mixing tube, specifically designed for abrasive waterjet cutting systems . It is a precision-machined cylindrical component manufactured from ultra-hard, wear-resistant tungsten carbide materials to withstand the extreme erosive forces of high-velocity water and garnet abrasive particles .

The nozzle tube is installed in the cutting head assembly immediately downstream of the mixing chamber and water orifice. Inside the tube, the high-pressure waterjet (up to 60,000 PSI / 4,137 bar) and abrasive particles are accelerated and focused into a coherent cutting stream . The internal diameter (ID) determines the kerf width and cutting precision; common sizes range from 0.020 inches (0.5 mm) to 0.040 inches (1.0 mm). This is a critical high-wear consumable component .

Dimensional Specifications:

• Nominal Length: 12.00 inches (304.80 mm) 

• Actual Length: 11.65 inches (295.91 mm) 

• Connection Type: 3/8 inch Nozzle Nut Connection 

• Pressure Rating: 60,000 PSI (approximately 4,100 bar) / 60K system rating 

Applications:

• Serves as the final focusing element for the abrasive waterjet, directing the cutting stream onto the workpiece 

• Accelerates the water-abrasive mixture to optimal cutting velocity (approximately 900 m/sec) for efficient material removal

• Defines the kerf width, cutting precision, and edge quality for the waterjet system 

• Installed in the cutting head assembly of KMT AccuStream, BFT, and compatible waterjet cutting machines 

• Used during scheduled maintenance, performance restoration, or when cutting quality visibly degrades 

Features:

• Ultra-Hard Tungsten Carbide Construction: Provides exceptional wear resistance, extending operational lifespan compared to standard materials 

• 3/8 Inch Nozzle Nut Connection: Industry-standard connection type compatible with major cutting head assemblies from KMT, Flow, OMAX, and H2O Jet 

• Precision Inner Diameter (ID): Manufactured to exacting tolerances to ensure a coherent, straight jet for clean, narrow kerf cuts 

• High-Pressure Rating: Engineered for continuous operation at 4,100 bar (60,000+ PSI) 

• Critical Consumable Component: As a high-wear part, the nozzle tube requires periodic replacement; lifespan depends on abrasive type, flow rate, and operating pressure 

Maintenance:

Failure Diagnosis (When to Replace):

• Reduced Cutting Performance: Noticeable decrease in cutting speed, rougher edge finish, or increased taper indicates bore wear 

• Asymmetric Wear: Uneven wear on the tube outlet circumference indicates misalignment between the water orifice and mixing tube

• Visible Bore Damage: Inspect the exit orifice for ovality, flaring, or visible bore enlargement using a magnifying glass

• Clogged Tube: Complete blockage results from wet or contaminated garnet abrasive, requiring immediate cleaning or replacement 

• Scheduled Preventive Replacement: Replace based on manufacturer hourly recommendations or when cutting quality degrades 

Inspection and Replacement Guidelines:

• Rotation Practice (Critical): Index the nozzle tube by 1/4 turn every 10-12 operating hours to distribute wear evenly around the circumference, significantly extending service life

• Orifice-to-Tube Ratio: Maintain a 1:3 diameter ratio between the water orifice and mixing tube (e.g., 0.010″ orifice with 0.030″ tube) for optimal cutting efficiency and tube life

• Alignment Check: Ensure perfect coaxial alignment between the water orifice and mixing tube; misalignment causes asymmetric wear and poor cut quality

• Handling Caution: The nozzle tube is extremely hard but brittle; handle carefully to avoid chipping, cracking, or impact damage during installation

• Full Depressurization (Critical): Before any maintenance, fully depressurize the waterjet system and follow lockout/tagout procedures

• Clean Installation: Thoroughly clean the mixing chamber and nozzle body before installing a new tube to remove debris

• Torque Compliance: When reinstalling the retaining nut, tighten to the specific torque value listed in the equipment service manual; over-tightening may crack the tube

• Water Quality Impact: Poor water quality accelerates tube wear; maintain proper water filtration to maximize component life 

• Abrasive Quality: Use clean, dry garnet abrasive; wet or contaminated abrasive causes clogging and accelerated wear

• Storage: Store spare nozzle tubes in a clean, dry, protective environment to prevent pre-service damage to the delicate inner bore

Cross-Reference Information:

• OEM KMT #: 05013735 

• WSI #: VL05013735 

• KMT Cross-Reference: WK000137 

• Compatible with: KMT, AccuStream, H2O Jet, BFT, Flow, OMAX waterjet systems 

• Weight: 0.748 lbs (approximately 0.34 kg)