Product Name: Focusing Tube (R-100) – Part No. 05147889

Description:
This component is a focusing tube, also known as a mixing tube or abrasive nozzle, specifically designed for high-pressure abrasive waterjet cutting systems. It is a precision-machined cylindrical consumable component manufactured from ultra-hard, wear-resistant tungsten carbide material.

The tube is installed in the cutting head assembly immediately downstream of the mixing chamber and water orifice. Inside the tube, the high-pressure waterjet (typically up to 60,000-94,000 PSI / 4,137-6,480 bar) and abrasive particles are accelerated and focused into a coherent cutting stream.

Dimensional Specifications:

• Inner Diameter: 0.018 inches (0.457 mm)

• Length: 2.00 inches (50.8 mm)

• Series: R-100 (ROCTEC 100) – A standard grade of tungsten carbide focusing tube 

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 

Features:

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

• R-100 Series: Standard grade focusing tube offering reliable performance for general cutting applications

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

• R-100 Lifespan: Under optimal conditions, R-100 focusing tubes typically provide 50-80 hours of service life 

• High-Pressure Rating: Engineered for continuous operation at 60,000-94,000 PSI

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

• Scheduled Replacement: Replace based on operating hours or when cut quality degrades (R-100 typical service life: 50-80 hours) 

Inspection and Replacement Guidelines:

• Rotation Practice: Rotate the focusing tube regularly (typically 1/4 turn every 10-12 hours) to distribute wear evenly and extend service life

• Orifice-to-Tube Ratio: Maintain the manufacturer‘s recommended diameter ratio between the water orifice and focusing tube for optimal cutting efficiency

• 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: Tungsten carbide 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: Perform maintenance in a designated clean area. Thoroughly clean the mixing chamber and nozzle body before installing a new tube 

• 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 

• 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: 05147889

• Series: R-100 (ROCTEC 100)

• Reference Table: Table 12-39 Focusing Tubes 

• Inner Diameter: 0.018″ (0.457 mm)

• Length: 2.00″ (50.8 mm)

• Pressure Rating: 60,000-94,000 PSI

• Material: Tungsten Carbide

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