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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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Making a small rectangular hole in 3/16" steel
Use layout dye, mark and center punch, drill 4 corner holes, use a saber
saw with a metal cutting blade and SLOW speed, clean up with a big file. Should take about 30 minutes. It helps to file some squaring notches in the holes with a 3 corener file to get the blade started square. Ugly but it has been done a million times. Ignoramus27829 wrote: I have this compressor http://igor.chudov.com/projects/CurtisCompressor/ and this hourmeter http://igor.chudov.com/tmp/hourmeter.jpg I would like to make a rectangular opening in the mounting base for the motor and pump, so that the hour meter would be facing the same direction as the pressure gauge, and look nicely, like it was mounted by the manufacturer. I would prefer that to making some stupid little enclosure for this meter or mounting it in odd places. For this, I would need to make about 3/4" by 1/5" (that's a guess) opening in the mouting base, which looks to be like it is 3/16" mild steel. The question is, can this be done sensibly with, say, a jigsaw and bimetal blades. Another question is, can such a meter take some vibration. It is not bad, as such, and I suppose that these Stewart-Warner hourmeters are made to withstand some vibration. i |
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