1991 BRIDGEPORT INTERACT720 VERTICAL MACHINING CENTER

Technical Description

The 1991 Bridgeport Interact 720 is a 3-axis vertical machining center produced by Bridgeport Machines at its UK facility, sharing the same platform and specifications as the 1990 model with minor production refinements. The machine features a 36.4-inch by 14.9-inch worktable with a 20-tool automatic tool changer and an ISO 40 spindle taper. The spindle motor delivers approximately 10 HP (7.5 kW) with a maximum speed of 4,000 RPM. X-axis travel is 29.9 inches, Y-axis travel is 16.1 inches, and Z-axis travel is 17.7 inches. The machine is equipped with a Heidenhain TNC 355 CNC control, providing conversational and ISO G-code programming with high-accuracy contouring. The Interact 720 is built with a robust cast-iron base, column, and saddle with precision-ground ballscrews and recirculating-ball guideways on all axes. Standard equipment includes flood coolant and automatic lubrication. Overall machine dimensions are approximately 126 inches long by 102 inches wide by 98 inches tall, with a machine weight of approximately 7,716 lbs. The 1991 Interact 720 represents continued production of the proven mid-range VMC that Bridgeport UK sold throughout the early 1990s. It is well regarded for its construction quality and the reliability of the Heidenhain TNC 355 control, and remains a capable platform for ferrous and non-ferrous machining in job shop and production environments. Some units from this period were upgraded with Fanuc 0M or Series 0 controls during retrofit programs.