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fading thoughts
Bookmarked 720 weeks ago the process and creation of a screw painting by artist andrew myers is featured here in a short form documentary by filmmaker benjamin pitts |
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a magnet machine
Bookmarked 532 weeks ago this machine manipulates small spherical rare earth magnets slicing one at a time from the end of a long chain moving it around a bit then dropping it back to re-connect at the tail end of the chainit also demonstrates a little snippet of science called eddy currents watch how slowly the magnet falls through the aluminum tube compared to falling through air: the falling magnet generates an electrical current in the tube and that current in turn generates a magnetic field that opposes the movement of the magnet slowing it down dramatically see http:enwikipediaorgwikieddy_current if you want morei made this machine for my father-in-law for his 75th birthday: astute viewers equipped with video analysis software and way too much time on their hands might find that the magnet drops 75mm from the tip of the slicer until caught by the lifter and that the lifter then drops it through a 75mm long aluminum tubethese magnets are currently a popular toy and can be purchased on the web or in stores usually in a set of 216 which makes a 6x6x6 cube many different brands exist: zen magnets http:zenmagnetscom buckyballs http:wwwgetbuckyballscom nanodots http:wwwthenanodotscom neo cube http:wwwtheneocubecom and more i highly recommend this toy watch some videos at the above sitesi used a plastic drywall anchor for the main screw drive that pulls the chain of magnets through the machine the 2 other driven axles -- the slicer and and the lifter -- are geared directly to the screw drive steven garrison039s gear cutting method was invaluable to make the gears operate smoothly see http:wwwspiralsbystevecomgearsphp the lifter is based on a standard four bar linkage a film advance mechanism but was modified to dip very low before lifting back up and stroking its straight vertical line at the topsee http:wwwflickrcomphotosdogrocketsets72157626544506603 for still photos of building iti don039t know who first figured out that 5mm spherical rare earth magnets could be so much fun but whoever they are i thank them |
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small amp large cannulated instruments
Bookmarked 488 weeks ago know more wwwjmshealthcomlarge cannuated instrumentscannulated drill bit 45mmcannulated tap with t- handle 70mmprotection sleeve 45mmdirect measuring device ssparallel wire guidethreaded guide wire 20mmstylet 20mmlarge cannulated cancellous screw driver -35mm tipcannulated counter sink length 230mmcannulated rigid reamers60mm70mm80mm85mm90mm95mm100mm105mm110mm115mm120mm125mm130mm135mm140mmsmall cannulated instrumentsthreaded guide wire 125 150mmcannulated drill bit 27mm135mm length 130mm plain shankcannulated drill bit 35mm135mm length 130mm plain shankcannulated counter sink qc 60mmcannulated tap 40mm qcdouble drill sleeve 27125mmdrill guide with stop 35mm27mm with two insertscannulated heaxagonal screw driver - 25mm tipdirect measuring device -ssstylet 125mmholding clipcannulated qc tap handle with fiber handledrill amp tap sleeve combined 2535mmcannulated drill bit |
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