Product Name: Autoline™ Diamond Orifice Assembly (0.012″ / 0.305 mm) – Part No. 05077300

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 0.012 inches (0.305 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 .

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 . The component weight is approximately 0.002 lbs (0.001 kg) . Cross-reference part numbers include KMT #05077300 and WSI #ORAL12D .

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 

• Precision Laser-Drilled Orifice: The 0.012 inch (0.305 mm) diameter hole creates an extremely precise, coherent waterjet for optimal cutting performance

• Extended Service Life: Diamond orifices maintain shape and precision even after prolonged use, resulting in consistent cutting quality 

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

• 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," is installed just before the orifice to prevent particles upstream in the high-pressure system from entering and damaging the orifice 

• 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

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

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

• 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 0.012 inch (0.305 mm) orifice, use a 0.036 inch (0.914 mm) mixing tube

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

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

• Clean Environment: Perform all maintenance in a clean area. Any contamination can negatively impact cutting performance

• Shut Off Abrasive First: At the end of each cut, shut off the abrasive flow first (approximately 0.5 second before water) to clear the feed line and prevent abrasive migration toward the orifice 

Cross-Reference Information:

• KMT / AccuStream #: 05077300 

• WSI Part Number: ORAL12D 

• Weight: 0.002 lbs (0.001 kg) 

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