1972 Blanchard 22HD-42 Rotary Surface Grinder, 42 Inch Chuck, 75 HP, 22 Inch Wheel, 480V

The Blanchard 22HD-42 is a high-power, geared-head vertical spindle rotary surface grinder designed for heavy-duty industrial applications. This machine features a 42-inch diameter electromagnetic chuck and a 22-inch diameter segmented grinding wheel, providing a maximum work swing of 48 inches inside the water guards. It is typically powered by a 75 HP or 100 HP geared-head main spindle motor, operating at approximately 720 RPM. The table offers six chuck rotation speeds ranging from 6 to 33 RPM, while the pick-feed downfeed system provides rates between 0.004 and 0.080 inches per minute. Built with a dry-base design, the machine includes an automatic lubrication system and can support a maximum work load of 3,000 lbs on the chuck.