New Britain Model 42 CNC Multi-Spindle

New Britain Machine Company was founded in New Britain, Connecticut in the early twentieth century and became one of the most significant American manufacturers of multi-spindle screw machines and automatics. Their machines were foundational to American automotive parts manufacturing through the mid-twentieth century. The company changed ownership multiple times and the New Britain brand has been incorporated into larger industrial groups. The large installed base of New Britain machines in North America continues to be supported by independent rebuilders and parts suppliers.

A CNC-converted machine retains the original mechanical frame, spindle drum, and tooling architecture but replaces the cam-driven programming system with CNC servo drives and a modern control. Quality varies by the rebuilder. A new CNC multi-spindle (such as Index MS or Schutte SC series) is purpose-designed for CNC from the outset, with features like higher-speed spindles, integrated tool monitoring, and modern connectivity. New machines offer superior performance and longer productive life, while converted machines offer lower entry cost for shops with existing tooling and process knowledge.

Typical parts for the Model 42 CNC include automotive fittings and connectors in the 20–42 mm diameter range, hydraulic fittings and valve bodies, fuel system components, agricultural fasteners and pins, electrical connector bodies, and fluid handling components. The 42 mm capacity covers most medium-diameter automotive and industrial turned parts that would be economically inefficient to produce on single-spindle turning centers at production volumes.

The Model 42 CNC is compatible with most standard multi-spindle bar feed magazines including LNS, FMB, and other major bar feed brands. Bar magazine selection depends on bar diameter, bar length, and production run duration requirements. Longer bar magazines extend unmanned running time between operator interventions. Modern bar feeds with remnant detection and automatic bar change integration are recommended for maximizing autonomous production time.

New Britain Model 42 service and parts are available from several specialized North American rebuilders and parts suppliers who have maintained inventories and expertise for the New Britain machine line. Independent multi-spindle service companies operate throughout the US Midwest and Northeast where New Britain machines are most concentrated. Original parts availability varies — many wear items are available, while some specialized components may require custom fabrication. Buyers should establish a service relationship with a reputable New Britain specialist before committing to production.