Description: Horizontal lapping machine is a hand lapping machine for fine finishing of cylindrical components like fuel injection equipments, hydraulic valves, pneumatic valves, rotary pump barrels, bushes, bearings and lubrication system components. The machine has a horizontal spindle on which expanding lap is mounted in the collet. For internal lapping, the component is held in hand and reciprocated over the lap in the presence of fine abrasive paste. The lap is rotated and expanded to the size of the bore. The lap comes in contact with the high portion of the bore and corrects the same by eliminating the high points. The process is continued till the entire bore is accurately polished. Accuracy of the order of 0.001 mm and finer can be produced. For external lapping the component is held in the machine collet or chuck while contracting lap is held in hand and the operation is carried out as explained above till the outer dia is polished.
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