New Britain Machine Model 832

The New Britain Machine Model 832 is an eight-spindle, 32 mm bar capacity CNC multi-spindle automatic turning center. New Britain Machine, a historically significant American manufacturer of multi-spindle screw machines and automatics, produced the Model 832 as part of its transition from purely mechanical cam-driven multi-spindle technology toward CNC-integrated production systems. The 832 designation reflects the machine's core configuration: 8 spindles, 32 mm maximum bar diameter — a specification set that addresses the complex, medium-diameter precision turned parts segment of the automotive, hydraulic, and industrial components market.

Eight spindle positions give the Model 832 substantial process engineering flexibility. When a part requires more than six distinct machining operations to be performed from bar stock through to finished turned component, the additional cycle positions available on an eight-spindle machine allow each operation to occupy its own station without requiring operations to be combined in ways that compromise tool life, cycle time, or dimensional accuracy. For automotive fuel injector components, transmission valve bodies, and hydraulic cartridge inserts in the 20–32 mm diameter range, the Model 832's eight positions frequently enable a level of process cleanliness — dedicated finishing passes, separate thread operations, individual drilling stations — that six-spindle machines cannot match without accepting cycle time penalties.

The CNC control architecture on the Model 832 replaces or supplements the mechanical cam systems that governed traditional New Britain Machine multi-spindles. Servo-driven cross slides and end-working slides operate under a multi-channel CNC control, with each spindle position managed as an independent axis group. This allows programmers to specify independent feed rates, infeed distances, and timing sequences per station, optimizing the cycle at each position independently of the others. The overall machine cycle time is governed by the slowest position — careful process engineering to balance operations across eight positions directly determines throughput.

New Britain Machine's design heritage in multi-spindle automatics informed the Model 832's structural specifications: heavy cast iron base casting for thermal stability and vibration damping, robust spindle bearings rated for continuous multi-shift production, and a coolant system designed for the chip volumes generated by eight simultaneous cutting operations in steel, brass, and aluminum. The machine's physical footprint is substantial, reflecting both the eight-spindle drum diameter and the surrounding tooling and slide assemblies required to equip all positions.

New Britain Machine-heritage CNC multi-spindles like the Model 832 are typically available as rebuilt or reconditioned machines in the $400,000–$850,000 range, positioning them below new European eight-spindle CNC alternatives while offering significant throughput capability for facilities with suitable production volumes. The New Britain name carries recognition in North American screw machine and multi-spindle communities, and a service and tooling support ecosystem exists — concentrated in the Connecticut and New England manufacturing corridor where the company was headquartered — to support ongoing production operations.