Dumore Tool Post Grinder #7-011, Internal/External Spindles, Case & Accessories

Dumore Series 7 Tool Post Grinder (Model #7-011)

Series: Series 7 | Horsepower: 3/4 HP | System: Interchangeable Spindle

Professional Overview

The Dumore 7-011 is a heavy-duty, versatile tool post grinder designed for precision internal and external grinding on lathes with a 9" to 20" swing. Part of the renowned Series 7 line, this unit is engineered for "heavy iron" performance, capable of high metal removal rates while maintaining the tight tolerances required for toolroom and production environments. Its interchangeable spindle design allows the machine to transition quickly between large-diameter external wheels and deep-reach internal spindles.

Technical Specifications

• Motor: 3/4 HP, 115V, Single-Phase, 60 Hz.
• Full Load Speed: 10,000 RPM.
• No Load Speed: 16,800 RPM.
• Max Lathe Swing: Up to 20".
• External Wheel Capacity: Up to 5" diameter wheels.
• Internal Grinding: Capable of reaching depths of up to 18" depending on the spindle used.
• Construction: Rigid cast iron frame with automatic spring tension for belt adjustment.

Key Performance Features

• Interchangeable Spindles: Unlike integral units, the 7-011 can accept various Dumore spindles (Internal or External) to suit specific job requirements.
• High-Accuracy Bearings: Spindles are designed for high-speed operation with minimal runout; notably, most Series 7 spindles are factory-sealed and do not require periodic oiling.
• Safe Configuration: Engineered to mount with the motor between the operator and the workpiece, ensuring that the grinding nut tightens during operation for maximum safety.
• Versatility: Ideal for grinding bearing seats, shafts, and internal bores on an existing lathe, providing a cost-effective alternative to single-purpose grinding machines.