Product ID: 10138444 – Nozzle Connecting Rod (Waterjet Cutting Head Assembly)

Description:
This component is a nozzle connecting rod, also known as a cutting head connector or extension shank, designed for high-pressure waterjet cutting systems . It is a precision-machined cylindrical component that connects the upper water on/off valve body to the lower mixing chamber assembly within the cutting head. This part serves as the critical passageway for ultra-high-pressure water to flow from the switching valve to the mixing chamber where abrasive is introduced .

Based on technical specifications provided by industrial sources, the nominal dimensions of this component are approximately 0.800 inches (20.32 mm) outer diameter, with an actual outer diameter of approximately 0.765 inches (19.43 mm) . The overall length is approximately 199.9 mm (approximately 7.87 inches) . The internal bore diameter is approximately 9.40 mm (0.370 inches) with a 26G thread specification .

Alternative part number cross-references include 1-13708 .

Applications:

• Used in waterjet cutting machines to conduct high-pressure water from the on/off valve (water switch) down to the mixing chamber and nozzle assembly .

• Installed between the water switch valve body and the mixing chamber assembly within the cutting head stack-up .

• Suitable for both pure water and abrasive waterjet systems operating at ultra-high pressures, typically up to 60,000 psi (approximately 4,137 bar).

• Compatible with major waterjet cutting head systems requiring high-precision bore finishes for efficient water flow .

Features:

• Precision-machined from high-strength, corrosion-resistant stainless steel to withstand ultra-high pressure water flow and abrasive environments.

• Internal bore requires exceptionally high surface finish and dimensional accuracy to minimize pressure loss and prevent turbulence in the water stream .

• Threaded ends for secure connection to the water valve body (upper) and mixing chamber assembly (lower).

• Engineered as a critical flow path component where internal bore quality directly affects cutting performance and jet coherence.

• Designed to provide proper alignment between the water switching valve and the abrasive mixing chamber.

• Compact cylindrical design facilitates installation within the cutting head assembly without interfering with other components.

Maintenance:

• Fully depressurize the waterjet system and follow lockout/tagout procedures before removing the nozzle connecting rod .

• During cutting head disassembly, remove the connecting rod carefully to avoid damage to threaded connections or sealing surfaces.

• Inspect the internal bore for signs of erosion, pitting, scaling, or wear caused by high-velocity water flow over time. Bore degradation can negatively impact cutting performance .

• Inspect both threaded ends for wear, galling, corrosion, or thread deformation.

• Inspect all sealing surfaces and O-ring grooves for damage that could cause high-pressure water leakage.

• Clean the component thoroughly using low-pressure water and a soft cloth; remove all debris, mineral deposits, or abrasive residue from the internal bore. Compressed air can be used for drying after cleaning .

• Do not use abrasive tools or harsh chemicals that could damage the precision-machined bore surface finish .

• When reinstalling, apply manufacturer-recommended thread lubricant or anti-seize compound to threads to prevent galling and ensure proper torque .

• Tighten connections to the torque values specified in the equipment service manual; over-tightening may damage threads while under-tightening may cause high-pressure leaks.

• Replace the nozzle connecting rod if internal bore erosion exceeds manufacturer-specified limits, if threads are damaged, if cracking is detected, or if sealing surfaces are compromised .

• During routine cutting head maintenance, inspect this component as part of the complete cutting head overhaul procedure .