This listing is for a matched pair of Paul W. Marino (PWM) 59" x 2" x 2" precision-ground modular fixturing rails. Constructed from high-stability, metrology-grade aluminum, these rails provide a lightweight yet exceptionally rigid foundation for long-format inspection and coordinate measuring machine (CMM) setups.
Designed for high-accuracy environments (Aerospace, Automotive, and Large-Scale Industrial Machining), these rails allow for the creation of an expansive longitudinal datum or a stable "bridge" setup for inspecting oversized components such as turbine housings, manifold assemblies, or structural frames.
Dimensions: (Per Rail)
Material: High-tensile, stabilized aluminum alloy.
Mass: Approximately 23.5 lbs per rail (Total lot weight: ~47 lbs).
Surface Geometry: All six faces are precision-ground to maintain critical parallelism and perpendicularity tolerances across the entire 5-foot span.
Modular Interface: Features the signature PWM Gage modular grid pattern (verify hole spacing, typically 1" or 2" centers) for seamless integration with standard clamps, standoffs, and riser blocks.
Thermal Properties: Aluminum construction ensures rapid thermal stabilization to gage-room ambient temperatures, minimizing measurement drift due to expansion or contraction.
Large Envelope Fixturing: Ideal for establishing a master reference plane for parts exceeding the standard workspace of most modular plates.
Non-Magnetic Inspection: The aluminum substrate is essential for inspections involving sensitive electronics or magnetic components where ferrous interference must be eliminated.
Dual-Rail Track Systems: Used in parallel to support long, cylindrical workpieces or to provide a stable "track" for sliding fixtures and adjustable mounting points.
Reduced Granite Loading: Significantly lower floor and plate loading compared to steel equivalents, protecting the calibration and longevity of your CMM granite master plate.