1989/2015 Bridgeport Series I 3-Axis CNC Mill | ProtoTrak MX3 | Power Drawbar

1989/2015 Bridgeport Series I 3-Axis CNC Mill

9" x 42" Table | ProtoTrak MX3 CNC (2015 Retrofit) | Full Tooling Package

"Modern CNC Precision on the Industry's Most Trusted Frame"

Available for acquisition is a 1989 Bridgeport Series I vertical knee mill that was professionally upgraded in 2015 with a 3-axis ProtoTrak MX3 CNC system. This isn't just a standard vintage mill; the 2015 retrofit ensures modern drive electronics, newer cabling, and precision ball screws for superior reliability and accuracy.

This machine is equipped for high-efficiency production, featuring a Power Drawbar for 3-second tool changes, a Genuine Kurt 6" Vise, and a Newall Digital Readout. With full 3-axis automation (X, Y, and Z-Quill), this Bridgeport excels at everything from complex 3D contouring and pocketing to automated high-speed drilling cycles.

Technical Specifications

• Base Machine: 1989 Bridgeport Series I (S/N: BR254761)
• CNC Retrofit Year: 2015 (Complete 3-Axis Electronics & Motors)
• Control: ProtoTrak MX3 (Conversational & G-Code)
• Table Size: 9" x 42" (Hardened & Ground)
• Spindle Motor: 2 HP, 220/440V, 3-Phase
• Spindle Speed: 60 – 4,200 RPM (Variable Speed)
• Ways: Hard-Chrome Dovetail Ways (Excellent Condition)
• Travels: 30" (X) x 12" (Y) x 5" (Z-Quill CNC Controlled)

Premium "Turn-Key" Package Inclusions

• Pneumatic Power Drawbar: Significantly reduces downtime by allowing rapid, push-button tool changes.
• Genuine Kurt 6" AngLock Vise: The American standard for workholding. Includes handle and ensures zero jaw-lift for maximum part parallelism.
• Newall 2-Axis DRO: Integrated with the CNC system using Spherosyn IP67 scales—completely waterproof and oil-proof for lifetime reliability.
• Full R8 Collet Set: Complete range from 1/8" to 3/4", allowing you to start machining immediately upon installation.
• 2015 ProtoTrak MX3 System: Features updated 3-axis drive motors and glass scale feedback for high-precision positioning.