Product Name: Autoline™ Diamond Orifice Assembly (0.013″ / 0.330 mm) – Part No. 05136098

Description:
This component is a synthetic diamond orifice assembly specifically designed for Autoline™ series abrasive waterjet cutting heads . It is a precision consumable component that creates the initial ultra-high-pressure waterjet before it enters the mixing chamber where abrasive is added. The orifice diameter is 0.013 inches (0.330 mm) .

The orifice assembly consists of a stainless steel housing containing a polycrystalline diamond (PCD) disc with a laser-drilled microscopic hole. Diamond is one of the hardest materials known, providing exceptional wear resistance and longevity in abrasive cutting environments . The diamond construction offers significantly extended service life compared to standard sapphire or ruby orifices, maintaining precise geometry even after prolonged use.

The assembly is specifically designed as a "pre-aligned" orifice, meaning the diamond orifice is factory-set for perfect coaxial alignment with the mixing chamber and focusing tube . This pre-alignment feature eliminates the need for manual jet centering adjustments, ensures optimal cutting performance, and extends the life of downstream consumable components such as the mixing tube.

This component is rated for continuous operation at 60,000–94,000 PSI (approximately 4,137–6,480 bar) and is compatible with Autoline™ I and Autoline™ II cutting head assemblies . According to the KMT Autoline™ Diamond Orifice specification table (Table 12-48), this orifice is listed with a 0.013 inch (0.330 mm) diameter . The component weight is approximately 0.002 lbs (0.001 kg) . Cross-reference part numbers include KMT #05136098, WSI #ORAL13D, and AccuStream #1-11280D-013 .

Applications:

• Generates the initial coherent high-pressure waterjet before abrasive mixing in Autoline™ series cutting heads

• Installed in the upper section of the cutting head assembly, positioned above the mixing chamber and focusing tube

• Suitable for ultra-high pressure waterjet systems operating at 60,000–94,000 PSI (4,137–6,480 bar)

• Used for precision cutting of hard materials including metals, stone, glass, ceramics, and composites

Features:

• Diamond Construction: Manufactured from synthetic diamond, one of the hardest known materials, ensuring superior resistance to wear and exceptional longevity 

• Pre-Aligned Design: Factory-set for perfect coaxial alignment, eliminating manual jet centering adjustments 

• Precision Laser-Drilled Orifice: The 0.013 inch (0.330 mm) diameter hole creates an extremely precise, coherent waterjet for optimal cutting performance

• Extended Service Life: Diamond orifices offer significantly longer life than sapphire or ruby orifices—typically 500-1,000+ hours compared to 20-40 hours for sapphire 

• Cleanable and Reusable: Unlike sapphire/ruby orifices which must be discarded when damaged, diamond orifices can often be restored by cleaning in an ultrasonic cleaner 

• Superior Abrasion Resistance: Diamond's exceptional hardness provides excellent resistance to abrasive wear caused by high-velocity water flow and garnet particles

• High-Pressure Rating: Engineered for continuous operation at pressures up to 94,000 PSI (6,480 bar)

• Autoline™ Compatibility: Specifically designed for Autoline™ style cutting heads, ensuring seamless integration and optimal performance

• Lightweight: Approximately 0.002 lbs (0.001 kg) for easy handling during maintenance 

Maintenance:

Water Quality Protection (Critical):

• Water Quality Impact: Poor water quality with contaminants, hardness (calcium, magnesium, silicon), or inadequate filtration dramatically reduces orifice life . Scale buildup from dissolved solids can form deposits around the internal diameter of the orifice, eventually resulting in poor jet quality

• Filter Requirement: A fine particle filter called the "last chance filter" should be installed just before the orifice to prevent particles upstream in the high-pressure system from entering and damaging the orifice . The use of a Short Stop or thimble-style filter is strongly recommended

• System Flushing: After servicing the pump, nozzle, or replacing any piece of plumbing, always flush the system by running a water-only test for several minutes with both the orifice and last chance filter removed 

Cleaning and Inspection:

• Regular Cleaning: Use an ultrasonic cleaner containing white vinegar to clean the diamond orifice. This removes material buildup, scale, and mineral deposits from the internal diameter 

• Visual Inspection: Before each operation, observe the waterjet at low pressure. A good water-only stream should look like a "stretched fishing line" along the first inch of its length 

• Jet Quality Check: If the stream becomes divergent, sprays, or the water column is not straight, the orifice may be damaged, misaligned, or have mineral buildup

• Inspect for Damage: Check the orifice for mineral deposits, plugging, or visible wear. Even minor surface damage affects jet coherence and cutting performance

• Diamond Advantage: When diamond orifices give a bad stream, they can often be fixed by cleaning them in an ultrasonic cleaner. This is not possible with sapphire or ruby orifices, which must be discarded 

Replacement and Handling:

• No Fixed Replacement Schedule: Diamond orifices do not require replacement on a fixed schedule. Replace only when the waterjet shows divergence, sprays, or cutting performance degrades

• Pre-Aligned Design Benefit: The pre-aligned design eliminates alignment errors and ensures optimal jet coherence from first use

• Stuck Orifice Removal: If the diamond orifice becomes stuck inside the abrasive head, it can be removed by blowing shop air through the side abrasive inlet port 

• Clean Installation: Before installing a new orifice, thoroughly clean the cutting head assembly to ensure no debris or contaminants are present. Keep hands clean prior to handling clean nozzle components 

• Storage: Store spare orifices in a clean, dry, protective container to prevent dust contamination or physical damage to the delicate diamond surface before use

Performance Maximization:

• Orifice to Mixing Tube Ratio: For optimal cutting performance and extended mixing tube life, maintain a 1:3 diameter ratio between the orifice and mixing tube . For a 0.013 inch (0.330 mm) orifice, use a 0.039 inch (1.0 mm) mixing tube

• Rotate Mixing Tube: Rotate the mixing tube 90° (or 120° depending on head type) every 8 hours of cutting to distribute wear evenly and extend component life 

• Clean Environment: Perform all maintenance in a clean area. Wear disposable gloves to prevent natural oils and contaminants from being introduced to the orifice 

• Use Quality Abrasive: Use only clean, dry, high-quality garnet abrasive. Wet or contaminated abrasive can cause clogging and accelerated wear

• Shut Off Abrasive First: At the end of each cut, shut off the abrasive flow before the water to clear the feed line and prevent abrasive migration toward the orifice

Cross-Reference Information:

• KMT / AccuStream #: 05136098 

• WSI #: ORAL13D 

• AccuStream #: 1-11280D-013 

• Weight: 0.002 lbs (0.001 kg) 

• Orifice Diameter: 0.013" (0.330 mm) 

• Compatible with Autoline™ I and Autoline™ II cutting heads