for grinding shoes or linings of drum brakes (of brake drum hubs B24B5/06, of brake discs B24B7/17)

Single purpose machines or devices for particular grinding operations not covered by any other main group > for grinding workpieces with arcuate surfaces, e.g. parts of car bodies, bumpers or magnetic recording heads > for grinding shoes or linings of drum brakes

Single-purpose machines or devices for particular grinding operations not covered by any other main group (tapering, chamfering, or relief cutting of taps or reamers B24B3/20, B24B3/22, grinding screw threads B23G) > for grinding workpieces with arcuate surfaces, e.g. parts of car bodies, bumpers or magnetic recording heads (grinding of spherical surfaces in general B24B11/00, of optical surfaces on lenses or surfaces of similar shape on other work B24B13/00) > for grinding shoes or linings of drum brakes (of brake drum hubs B24B5/06, of brake discs B24B7/17)