a street organ played by an organ grinder is an automatic mechanical pneumatic organ designed to be mobile enough to play its music in the street. the two most commonly seen types are the smaller german and the larger dutch street organ.
grinding wheels are designed to be run at a maximum safe speed, the spindle speed of the grinding machine may be variable but this should only be changed with due attention to the safe working speed of the wheel. as a wheel wears it will decrease in diameter, and its effective cutting speed will be reduced. some grinders have the provision to .
with this new point grinding, it was possible to handle all possible contours in one setup in just a single clamping operation. the computer-controlled grinding wheel moves along the programmed contour with pinpoint accuracy and machines almost any material from plastic to carbide. political, social and cultural activities
grinding uses an abrasive process to remove material from the workpiece. a grinding machine is a machine tool used for producing very fine finishes, making very light cuts, or high precision forms using an abrasive wheel as the cutting device.
the machines can be made for wet or dry operation. furthermore, a wide belt grinding machine can be constructed with single or multiple heads. the first head is used for coarse grinding and the next heads gradually make a finer finish.
the organ grinder was a musical novelty street performer of the 19th century and the early part of the 20th century, and refers to the operator of a street or barrel organ. period literature often represents the grinder as a gentleman of ill repute or as an unfortunate representative of the lower classes.
grinding is an abrasive machining process that uses a grinding wheel as the cutting tool. a wide variety of machines are used for grinding: hand-cranked knife-sharpening stones grindstones handheld power tools such as angle grinders and die grinders; various kinds of expensive industrial machine tools called grinding machines; bench grinders