PFI Precision Machining

PFI Precision Machining is a lean, solutions-focused precision machining manufacturer specializing in close-tolerance components and complex assemblies across multiple industries, including food service equipment. The company distinguishes itself through disciplined problem-solving methodologies and the ability to intervene at any stage of the prod... uct lifecycle to remediate performance issues and design manufacturing solutions that enhance reliability and service life. A representative engagement demonstrates this capability: when a food service equipment manufacturer faced annual field failures exceeding $40,000 due to shaft and key assembly defects, PFI assembled a dedicated team to conduct in-depth root cause analysis and develop corrective action. The company's systematic approach to achieving precise dimensional accuracy on mated mechanical parts led to the design of a specialized grinding process for the blind keyway that maintained 0.0005" tolerances, ensuring proper clearances and eliminating the failure mode. PFI also assumed full production responsibility for the drive key, leveraging investment casting to achieve near net shape geometry followed by precision grinding to the same 0.0005" tolerance specification. The solution incorporated 8620 steel for its superior surface hardenability and internal strength, with production processes including turning, milling, and multiple grinding passes to deliver 16 RMA or better surface finishes, complemented by case hardening to enhance wear resistance and core toughness. The final assembliesmeasuring 4.5" in length with diameters ranging from 0.5000" to 0.9200"eliminated field failures and extended component service life, demonstrating PFI's commitment to quality and its expertise in solving complex manufacturing challenges through precision engineering and rigorous process control.Read More