Let BlueStacks turn your PC, Mac, or laptop into the perfect home for Fit Tolerance ISO, a fun Tools app from Yaşar Yücel Yeşilbağ.
Fit Tolerance ISO feels like a handy pocket tool for anyone who deals with holes and shafts all day. It takes a nominal size and the chosen hole or shaft tolerance, then spits out the upper and lower limits, the deviations, and tells the user whether the result is a clearance fit, a transition fit, or an interference fit. There is a small sketch that shows the overlap or gap, which makes the numbers click in the head a bit faster. It follows ISO 286-1 and ISO 286-2 from 2010, plus ANSI B4.2 from 1978, all in metric, so it fits real world shop work for journal bearings, linear bearings, thrust bearings, bushings, ball and roller bearings, housings, cylinder bores, drilled holes, linear and precision shafts, pistons, and similar parts.
What stands out is how direct it is. No fluff, just pick the tolerance grades, enter the size, done. The Supplements section is a nice touch, listing the preferred fits and grades that those standards actually recommend, which helps when someone is not sure what pairing to start with. It is not flashy, but that is the point. On BlueStacks, running it on a PC, the fit diagram and numbers are easier to read, and typing tolerances with a keyboard feels quicker when CAD or a spreadsheet is open alongside. Watching the fit flip from clearance to interference as the nominal size or grades change has a weirdly satisfying feel, like everything lining up the way it should.
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