Product Name: Autoline™ Diamond Orifice Assembly (0.011″ / 0.279 mm) – Part No. 05101753

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 0.011 inches (0.279 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 . According to the KMT Autoline™ Diamond Orifice specification table (Table 12-48), this orifice is listed with a 0.011 inch (0.279 mm) diameter . The component weight is approximately 0.002 lbs (0.001 kg) . Cross-reference part numbers include KMT #05101753 and WSI #ORAL11D .

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 0.011 inch (0.279 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:

• Visual Inspection: Before each operation, observe the waterjet at low pressure. A good water-only stream should be symmetrical, coherent, and brilliant

• 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

• 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 0.011 inch (0.279 mm) orifice, use a 0.033 inch (0.838 mm) mixing tube

• Rotate Mixing Tube: After every 8 hours of cutting, rotate the mixing tube 90° 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

Cross-Reference Information:

• OEM KMT #: 05101753

• WSI Part Number: ORAL11D

• Weight: 0.002 lbs (0.001 kg)

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