USED 1981 BRIDGEPORT SERIES I
Overview
The Bridgeport Series I Knee Mill is one of the most iconic manual milling machines ever produced. Renowned for its versatility, durability, and precision, the Series I has been the backbone of toolrooms and maintenance departments for generations. Its variable-speed head, rigid knee design, and wide selection of available tooling make it suitable for drilling, boring, slotting, and light production milling operations.
Used Bridgeport Series I knee mills remain in high demand due to their long service life, ease of operation, and adaptability across industries ranging from aerospace and defense to education and general manufacturing. MachinesUsed.com regularly buys, sells, and consigns Bridgeport Series I mills in a variety of configurations and conditions.
Specs
Table Size:: 9" x 42"
Longitudinal Travel:: 30"
Cross Travel:: 12"
Quill Travel:: 5" Hand or Power Feed
Knee Travel:: 16"
Spindle Center to Column Distance:: 6.75" - 18.75"
Overarm Ram Adjustment:: 12" Manual Adjustment
Max Table Load:: 750 Lbs.
Power Quill Feeds:: (3) .0015 / .003 / .006 IPR
Spindle Taper:: R-8
Spindle Speeds:: 60-4200 RPM Variable in 2 Ranges
Spindle Nose to Table Min-Max:: 2.5" - 18.75"
Head Tilt Front to Back:: +/- 45 Degrees
Head Swivel Left to Right:: +/- 90 Degrees
Spindle Drive:: 2 HP
Equipped With
Acu-Rite 200S 2-Axis Digital Readouts (.0002 Resolution), Kurt Power Draw Bar, Servo 150 X-Axis Variable Speed Power Table Feed, Mitutoyo Quill Scale (.0005 Resolution), 9"x42" Table, Chrome Ways, Knee Handle, Quill Handle, Bijur 1-Shot Lubrication, Colllet Rack
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