Onsrud P-Series

The Onsrud P-Series is a high-throughput production CNC router platform engineered for industrial composite machining, specifically targeting aerospace and defense suppliers, automotive interior fabricators, and industrial composite manufacturers that process carbon fiber, fiberglass, Kevlar, and honeycomb core materials at production volumes. Onsrud Cutter, based in Libertyville, Illinois, has been a recognized name in precision routing tooling for decades, and the P-Series machine platform reflects the company's deep application knowledge in composite material processing where tooling engagement, chip evacuation, and surface finish directly affect part quality.

The P-Series is built on a heavy steel welded bed with a moving-table or moving-gantry configuration depending on the specific model. The machine's structural mass is a deliberate design choice for composite routing applications, where vibration during high-speed cutting creates surface delamination and fiber pullout on carbon and aramid fiber materials. Linear guide rails on all axes provide precise, low-friction motion that supports the high feed rates and consistent depth-of-cut control needed to achieve clean composite edges without secondary finishing operations.

Spindle options for the P-Series include both HSD and custom high-frequency electrospindles configured for the torque curve and RPM range that suit fiber-reinforced composite cutting. High spindle speeds — up to 30,000 RPM on some configurations — minimize cutting forces per tooth, which is critical for thin-skin composite panels and honeycomb sandwich structures that cannot tolerate high lateral cutting loads. Dust and chip management on P-Series machines is engineered specifically for composite waste streams, with enclosure options and high-velocity extraction systems that keep composite particulate — a respirable hazard — contained.

Automatic tool changers with high tool-count magazines are standard on the P-Series for production environments running complex trimming programs with multiple tool diameters. Probing and tool length measurement systems ensure that tool wear compensation is applied automatically across long production runs, maintaining dimensional consistency without constant operator intervention. Workholding configurations include vacuum tables and custom fixture plates designed for aerospace part geometries that cannot use standard spoilboard systems.

For aerospace Tier 1 and Tier 2 suppliers qualifying new machining processes, the P-Series can be delivered with documentation packages supporting NADCAP and AS9100 process qualification requirements. Onsrud's applications engineering team works with buyers during the machine specification process to match spindle, tooling, and fixturing to the specific composite stack and dimensional requirements of the production program — a level of application support that distinguishes Onsrud from general-purpose router manufacturers.