Product Name: Focusing Tube / Mixing Tube (Nozzle Tube) – Part No. 05131784

Description:
This component is a precision focusing tube, also known as a mixing tube, nozzle tube, or abrasive nozzle, specifically designed for high-pressure abrasive waterjet cutting systems . It is a critical consumable component that serves as the final exit point in the cutting head assembly, where the ultra-high-pressure waterjet and abrasive particles (such as garnet) are mixed, accelerated, and focused into a coherent, high-velocity cutting stream .

The tube is manufactured from ultra-hard, wear-resistant materials such as tungsten carbide, boron carbide, or advanced composite carbides to withstand the extreme erosive forces of high-velocity abrasive flow . It is engineered to withstand continuous operation at pressures up to 60,000-94,000 PSI (approximately 4,137-6,480 bar) .

Dimensional Specifications:

• Nominal Length: 6.25 inches (158.75 mm)

• Actual Length: 5.91 inches (150.11 mm)

• Inner Diameter (ID): Refer to the manufacturer's specifications for the exact diameter; common sizes include 0.030", 0.040", 0.050", and 0.060" .

Applications:

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

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

• Installed in the cutting head assembly of compatible waterjet systems

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

Features:

• Tungsten Carbide / Composite Material Construction: Provides exceptional wear resistance and extended service life under extreme abrasive flow conditions 

• 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 60,000-94,000 PSI (4,137-6,480 bar) 

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

• Compatibility: Designed to be compatible with specific waterjet cutting heads and systems, ensuring proper fit and functionality within the overall cutting assembly 

Maintenance:

Failure Diagnosis (When to Replace):

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

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

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

• Jet Divergence: If the abrasive/water stream appears scattered or divergent, the focusing tube may be worn 

• Clogged Tube: Complete blockage results from wet or contaminated garnet abrasive, or foreign particles entering the system

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

Inspection and Replacement Guidelines:

• Rotation Practice (Critical): Rotate the focusing tube by 1/4 turn every 10-12 operating hours to distribute wear evenly around the circumference and significantly extend service life 

• Orifice-to-Tube Ratio: For optimal cutting performance and extended mixing tube life, maintain the manufacturer's recommended diameter ratio between the water orifice and focusing tube

• Alignment Check: Ensure perfect coaxial alignment between the water orifice and focusing tube. Misalignment causes asymmetric bore wear, poor cut quality, and significantly reduced tube life 

• Handling Caution: The focusing 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, shut off the high-pressure water supply, and follow lockout/tagout procedures 

• Clean Installation: Perform the rebuild in a designated clean area. Thoroughly clean the mixing chamber and nozzle body before installing a new tube to remove debris that could cause misalignment 

• 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 with contaminants 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

• Check for Leaks: Before operation, ensure all connectors (high-pressure water pipe, abrasive hose) are tightly clamped; apply thread sealant to connection threads to prevent loosening 

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

Cross-Reference Information:

• OEM Part Number: 05131784

• Table Reference: Table 12-44 Nozzle Tubes 

• Nominal Length: 6.25″ (158.75 mm) / Actual Length: 5.91″ (150.11 mm)

• Pressure Rating: 60,000-94,000 PSI (4,137-6,480 bar)

• Compatible with: KMT, Flow, OMAX, BFT, WSI, and other standard waterjet systems