Abstract: A grinding machine wheel guard hood adjusting apparatus, wherein a wheel guard hood is swingably attached to a wheel guard at one end so that the opposite end of the hood may be swung into close proximity with a grinding wheel circumference. A pivot joint is provided on the wheel guard, having its axis parallel to the hood swing axis, and a housing is affixed to the first pivot joint. A screw is rotatably carried in the housing and a stepping motor is carried on the housing to drive the screw in rotatable directions. A second pivot joint, having its axis parallel to the first pivot joint axis is provided on the swingable hood at a point away from the swing axis, and a nut is affixed to the second pivot joint.