1971 Boyar-Schultz Challenger HR612 Surface Grinder

Featuring Integrated Optidress Precision Wheel Dressing System

Serial No: T6635047 | 6" x 12" Capacity | Roller Way Design

Overview

This 1971 Boyar-Schultz HR612 is a premium tool-room asset, elevated by the inclusion of a factory-integrated Optidress system. While the Challenger series is already legendary for its roller-way table—which provides "finger-tip" manual control—the addition of the Optidress transforms this machine into a high-capability form grinding station.

Ideal for tool-and-die shops, this machine allows for the creation of intricate punches, dies, and gauges with extreme repeatable accuracy. The 1971 vintage represents the peak of American mechanical engineering, offering a level of mass and rigidity that modern lightweight grinders cannot match.

Technical Specifications

• Year of Manufacture: 1971
• Table Capacity: 6" x 12"
• Table Ways: Precision Roller Bearings (HR Series)
• Spindle Motor: 1 HP Direct Drive (3,450 RPM)
• Vertical Capacity: 12" under 7" wheel
• Longitudinal Travel: 13"
• Cross Travel: 7"
• Lubrication: One-Shot Central Lubrication System

The Optidress Advantage

The Optidress unit is the centerpiece of this machine’s capability:

• Optical Precision: Features high-magnification optics to view the diamond-to-wheel contact point clearly.
• Complex Profiles: Dress radii, angles, and complex tangent forms directly on the machine.
• Eliminate Setup Time: No need for external radius dressers or templates; dress the wheel and return to grinding in seconds.
• On-Machine Inspection: Allows the operator to visually verify the wheel profile without disturbing the workpiece setup.

Condition & Value

• Mechanical Integrity: The Roller Way system remains smooth and responsive, ensuring a superior surface finish and reduced operator fatigue.
• Investment Grade: The Boyar-Schultz HR612 with an Optidress is a rare find on the used market. The Optidress unit alone often accounts for a significant portion of the machine's resale value.
• Serviceable: All components, including the spindle bearings and way rollers, are fully serviceable with readily available industrial parts.

Dealer Note: This is not just a surface grinder; it is a complete precision profiling solution. If your shop requires high-accuracy form grinding with the tactile feedback of a manual machine, this HR612 is the perfect candidate.