Graco 100036 Screw Mach Rdh

Graco 100036 Screw Mach RDH: Precision Screw Metering Element for High-Performance Dispensing Systems

The Graco 100036 Screw Mach RDH is a high-precision screw component engineered for fluid metering and dispensing in industrial-grade airless coating systems. Manufactured to Graco’s stringent tolerances, this machined screw measures 0.6 by 0.3 by 0.3 inches and weighs approximately 0.005 pounds. Typical viscosity compatibility ranges from 50 to 3000 centipoise, allowing for precise metering of solvent-based or high-solids formulations. Materials selection focuses on corrosion-resistant alloys to withstand viscous media. Integration into pump modules enhances fluid control and ensures consistent throughput across varying viscosities.

• Material: 17-4 PH stainless steel with hardened surface finish.
• Dimensional tolerance: ±0.0005 inches for repeatable metering.
• Thread profile: ACME-like geometry for optimized pressure transmission.

This screw integrates seamlessly with high-pressure pump assemblies used in professional coatings applications, optimizing volumetric transfer and reducing pulsation. The conical lead enhances priming efficiency while minimizing backflow under cyclical load. Key design features include precision-ground flight surfaces and chamfered edges to improve sealing. Flight geometry also contributes to acoustic dampening within the pump chamber, reducing noise levels during operation up to 6 dB. Its compact dimensions make it suitable for retrofit in existing manifolds, supporting consistent performance in demanding industrial environments.

Application engineers often pair the Graco 100036 component with maintenance modules in advanced seal systems and use it alongside Graco’s dedicated repair accessories. In fact, technicians incorporate it during service intervals when troubleshooting nozzle wear or restoring spray patterns via the graco gun repair kit. Its compatibility with an airless sprayer platform allows for rapid disassembly, cleaning, and reinstallation, ensuring uninterrupted throughput in professional coatings operations.

Material science is central to the performance of the Mach RDH screw. Manufactured from high-alloy stainless steel, the component undergoes post-machining heat treatment to achieve uniform grain structure and enhanced fatigue resistance. Surface finishing processes include electropolishing to minimize micro-roughness and reduce friction. These treatments directly contribute to seal longevity by preserving consistent clearances and mitigating wear when pumping abrasive or chemically aggressive media.

In bench tests, the 100036 screw demonstrated superior volumetric accuracy at pressures exceeding 3000 psi, especially when installed in conjunction with the graco paint sprayer filters to optimize contaminant removal around the screw bore. Engineers reported a 15% improvement in pump efficiency due to reduced internal leakage and optimized fluid channeling. The screw’s geometry also supports laminar flow regimes, mitigating turbulence and pressure spikes, and ensuring repeatable deposition rates in automated spray lines.

Design & Machining Specifications

Dimensional control is vital to maintain uniform screw pitch and flight depth. Tolerances are held within ±0.0005 inches using precision multi-axis CNC milling, followed by grinding operations that enhance concentricity. Thread profile optimization minimizes dead volume and extends component life. Post-machining inspections employ laser scanning for 3D form analysis, verifying compliance with OEM specifications and ensuring reproducibility across production batches.

Routine maintenance protocols recommend disassembling the screw at defined intervals to inspect for wear and abrasive ingress. Ultrasonic cleaning in solvent baths removes polymer or pigment residues without impacting surface integrity. Technicians should verify dimensional fidelity using micrometers or optical comparators post-cleaning. Reassembly demands cleanroom-like conditions to prevent particulate contamination, and lubrication with compatible low-viscosity greases ensures smooth reinstallation. The component withstands plasma sterilization cycles, enabling use in bio-coating processes where sterility is critical. Validated exposure to ethanol-based cleaning agents expands its maintenance options.

Integration is straightforward in modular pump stations, allowing the screw to interface with quick-connect manifolds and downstream hose assemblies. Proper coupling to high-durability hoses preserves fluid integrity and minimizes pressure loss. Operators often rout the screw outlet through reinforced lines built into the pump housing when combining with graco paint sprayer hoses, ensuring compatibility with existing airless sprayer frameworks and streamlining workflow in automated paint booths.

Long-term cycle testing indicates the Mach RDH screw can endure over a million reciprocating strokes before tolerance drift exceeds threshold values. Wear pattern analysis shows even abrasion across the flight surfaces, confirming balanced loading. Engineers simulate temperature extremes to validate performance between -20 °C and 80 °C, verifying the screw’s resilience under dynamic conditions. Comprehensive durability trials underscore its suitability for continuous-duty industrial spraying operations.

In summary, the Graco 100036 Screw Mach RDH exemplifies robust engineering for fluid dispensing, combining precision machining with advanced material treatments. Its integration into pump and spray systems enhances operational stability and throughput. Ideal for professional coatings projects and demanding industrial applications, this screw element delivers reliable performance, extended service intervals, and consistent deposition, upholding Graco’s standards for quality and innovation.