USED 1972 ATLANTIC 4000

1972 Atlantic 4000 Series Precision Jig BoreSerial Number: 4000-372-07 | Origin: Made in USA | Type: Manual Precision BoringOverviewThe Atlantic 4000 Series is a classic of American toolroom engineering, prized for its "tenth-splitting" accuracy and massive rigidity. Manufactured in July 1972, this machine represents the peak of manual precision machining, designed to meet the micro-tolerance demands of aerospace, automotive, and medical tooling.Built on a seasoned cast-iron frame with hardened, ground, and lapped box ways, the 4000 Series provides a level of thermal stability and vibration dampening that modern lightweight mills cannot match.Technical SpecificationsModel: Atlantic 4000 SeriesYear of Manufacture: July 1972Serial Number: 4000-372-07Table Working Surface: 12" x 18"Table Travel (X-Axis): 16" LongitudinalTable Travel (Y-Axis): 12" CrosswiseVertical Travel (Z-Axis): 14" (Knee) + 5" (Quill)Spindle Taper: Morse Taper (MT)Spindle Speeds: Infinitely Variable, 100 – 2,100 RPMSpindle Feeds: Variable, 0 to .023" per revolutionPositioning Accuracy: Guaranteed to .0002" Squareness & ParallelismDrive Motor: 1.5 HP to 2 HPLubrication: Integrated one-shot manual systemMachine Weight: Approximately 3,000 lbsKey FeaturesPrecision Positioning: Equipped with hardened and ground precision lead screws for reliable manual positioning down to .0001".High-Stability Head: Features a counterbalanced spindle head and super-precision preloaded bearings for minimal runout during critical boring cycles.Zero-Overhang Design: The robust construction ensures the table is fully supported throughout its entire range of travel, maintaining perfect flatness across the workpiece.Industrial Durability: Hardened box ways ensure the machine maintains its factory "tenths" accuracy even after decades of service.Dealer NoteSerial number 4000-372-07 identifies this as a "Golden Era" machine. For shops that require Moore-level accuracy with a larger work envelope, the Atlantic 4000 is the premier choice for high-end fixture work, engine rebuilding, and prototype development. It is a niche, high-mass asset that provides a level of precision that lightweight modern machinery simply cannot replicate.