New Britain Machine Model 54

Chucking work, not bar work, is what the New Britain Machine Model 54 is listed for: a 6-spindle multi-spindle automatic with 4 in (102 mm) chucking capacity and a weight of approximately 30,000 kg (66,000 lb). The model is not in New Britain Machine's current range and the table has not been confirmed against a maker's page, so these are the listed figures only.

The capacity row is the one to read closely. It is headed as bar or chuck diameter but the value is a chucking capacity, and the loading row gives manual or automated chucking depending on the application. That points at forgings, castings and sawn blanks loaded one at a time, where the six stations divide a long turning cycle into overlapping operations. How the parts get in and out, by hand or by automation, decides the real output and should be settled per machine.

In the CNC configuration the main spindle drive is an AC servo, the cross slides are CNC servo-driven per spindle position and the end-working slides are servo-driven. The control is a multi-channel CNC, Siemens or Fanuc depending on configuration. Spindle speed is described only as variable and appropriate to large-diameter chucking applications; there is no rpm figure, and no power figure either.

Coolant is listed as high-flow flood with chip management, which fits the chip volume of roughing 4 in (102 mm) blanks on six stations at once. Check the floor before anything else: approximately 30,000 kg (66,000 lb) is a foundation and rigging job.