for grinding outer surfaces concentrically to bores, involving additional centering means

Full Title

Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor (B24B11/00 - B24B21/00 take precedence; honing machines or devices using abrading blocks performing axial and rotary movements superimposed on one another B24B33/00) > involving centreless means for supporting, guiding, floating or rotating work (centreless turning B23B5/08; centreless grinding of threads B23G1/42) > for grinding outer surfaces concentrically to bores, involving additional centering means