1990 BRIDGEPORT VMC720 VERTICAL MACHINING CENTER

Technical Description

The 1990 Bridgeport VMC720 is a 3-axis vertical machining center produced by Bridgeport Machines at its UK facility, also known as the Interact 720, representing the mid-range model in Bridgeport's UK-built VMC lineup. The machine features a 36.4-inch by 15.0-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, which is characteristic of early-1990s Bridgeport VMC design emphasizing rigidity and torque. X-axis travel is 29.9 inches (760mm), Y-axis travel is 15.7 inches (400mm), and Z-axis travel is 17.7 inches (450mm). The machine is equipped with Bridgeport's proprietary Interact CNC control, which provided ISO G-code and conversational programming. Machine construction features a robust cast-iron base, column, and saddle with precision-ground ballscrews and recirculating-ball guideways. The table load capacity is approximately 925 lbs. 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 1990 VMC720 was Bridgeport's answer to the growing demand for mid-size CNC machining centers in the early 1990s, and was sold across European and North American markets. Buyers of machines from this era should confirm control system status and servo drive condition, as proprietary controls from this period may have limited replacement parts availability.