Abstract: A method for removing tile adhered by a substance to a floor includes the step of enclosing a volume generally above an area of the floor and tile, with the tile and floor defining the bottom of the volume enclosed. The temperature in the volume enclosed is reduced so that the substance adhering the tile to the floor becomes embrittled. The apparatus is maintained in position over the area of the floor for a predetermined time to produce the required embrittlement of the adhering substance, and then moved to expose the area of the floor previously below the volume enclosed. The tile is then removed from the floor. An apparatus for use in the method is also disclosed.

Abstract: A multi-angle grinding fixture comprising a block formed from suitable steel which has slots for holding a spade drill blade in predetermined positions. The blade is held in a first slot for grinding the primary side clearance on each side of the blade. The blade is held in a second slot for grinding a secondary side clearance on each side of the blade. The blade is held in a third slot for cutting the cutting lip angle or for grinding the cutting lip angle on each side of the blade. The blade is held in a fourth slot for cutting or grinding the radius of the cutting edge lip on each side of the blade. The fixture block may be used for either new construction work on a blade or for regrinding a blade.