Atlantic 4000 Precision Boring Machine - Morse Taper - 12" x 18" Table - Made in USA

1972 Atlantic 4000 Series Precision Jig Bore

Serial Number: 4000-372-07 | Origin: Made in USA | Type: Manual Precision Boring

Overview

The 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 Specifications

• Model: Atlantic 4000 Series
• Year of Manufacture: July 1972
• Serial Number: 4000-372-07
• Table Working Surface: 12" x 18"
• Table Travel (X-Axis): 16" Longitudinal
• Table Travel (Y-Axis): 12" Crosswise
• Vertical Travel (Z-Axis): 14" (Knee) + 5" (Quill)
• Spindle Taper: Morse Taper (MT)
• Spindle Speeds: Infinitely Variable, 100 – 2,100 RPM
• Spindle Feeds: Variable, 0 to .023" per revolution
• Positioning Accuracy: Guaranteed to .0002" Squareness & Parallelism
• Drive Motor: 1.5 HP to 2 HP
• Lubrication: Integrated one-shot manual system
• Machine Weight: Approximately 3,000 lbs

Key Features

• Precision 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 Note

Serial 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.