Product Name: Focusing Tube (R-500) – Part No. 05105366

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 . The numbers in the part description indicate an inner diameter of approximately 0.170 inches (4.31 mm) and an overall length of approximately 10.85 inches (275.7 mm). This tube is specifically designated as an R-500 series, which is a Kennametal ROCTEC 500 brand abrasive focusing tube.

Manufactured from ultra-hard, wear-resistant tungsten carbide material, it is installed in the cutting head assembly downstream of the mixing chamber . Inside this 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 . This component is a high-wear consumable part that requires periodic replacement as its inner bore gradually erodes over time .

Applications:

• Serves as the final focusing element for the abrasive waterjet in cutting heads

• 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 Construction: Premium-grade tungsten carbide provides exceptional wear resistance and extended service life under extreme abrasive flow conditions

• ROCTEC 500 Series: Advanced material formulation for enhanced wear resistance compared to standard tungsten carbide tubes

• Large Inner Diameter (0.170″ / 4.31 mm): Designed for high-flow abrasive delivery and faster material removal rates

• Optimized Length (10.85″ / 275.7 mm): Engineered for specific cutting head configurations to maximize jet coherence

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

• Pressure Rating: Rated for continuous operation at 60,000-94,000 PSI (4,137-6,480 bar)

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

• Clogged Tube: Complete blockage results from wet or contaminated garnet abrasive

• 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 120 degrees every 10-20 operating hours to distribute wear evenly around the circumference and significantly extend service life

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

• 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

• 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

• 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: Thoroughly clean the mixing chamber and nozzle body before installing a new tube to remove debris that could cause misalignment

Cross-Reference Information:

• OEM KMT #: 05105366

• WSI #: AB37R500

• Also referenced as: ROCTEC 500 series

• Inner Diameter: 0.170" (4.31 mm)

• Length: 10.85" (275.7 mm)

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