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With the Model H micro drilling machine from Minitool, Inc., users can drill holes with diameters ranging from 0.025 mm to 0.050 mm in materials such as steel, stainless steel, ceramics, plastics and other metals.
According to the company, the customized drill guidance and precision in feed features (the smallest in feed increment is 1 micron) create round holes and favorable surface finish. Combined with the small-hole drilling capabilities, the manual control features also make the machine suitable for use in research laboratories.
Inline, interchangeable vee bearings replace the conventional ball or sleeve bearings. The drills are mounted within an interchangeable drive pulley and held against the vee bearings by means of a drive belt. The company says that the drill essentially becomes its own spindle, virtually eliminating the runout that is a common factor in conventional machines using ball bearings, sleeve bearings, spindles, collets or chucks.
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