Patent ID: 7223159

Claim:
A centreless cylindrical grinding machine for through-feed and in-feed grinding of various workpieces, the centreless cylindrical grinding machine comprising: a first driven positioning axis X S for a grinding spindle head with a grinding wheel; a second driven positioning axis X R running parallel to the positioning axis X S for a regulating spindle head with a regulating wheel, whereby the positioning axes X S and X R are arranged at right angles to rotating axes of the grinding wheel and the regulating wheel; and a workpiece support arranged substantially between the grinding spindle head and the regulating spindle head, whereby another positioning axis Y W for a carriage driven and running at right angles to the positioning axes X S and X R is present on a carriage track and the workpiece support is placed on the carriage, the centreless cylindrical grinding machine further comprising a drive for the positioning axis Y W of the carriage adapted to generate oscillating movements, wherein the grinding spindle head, the regulating spindle head, the workpiece support and a wheel-true device are arranged inside a safety housing, whereby the carriage on the carriage track is movable into a position lying outside the safety housing, and whereby the carriage is adapted to be selectively fitted with the wheel-true device, the wheel-true device being an inner-acting dresser or an outer-acting dresser, the wheel-true device further including a truing contrivance for the grinding wheel and a truing contrivance for the regulating wheel.