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Gauges |
Low friction shaft support
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The low friction shaft support methods described in this article are design versions of the rotating kinematical pair: a simple rotating shaft and its corresponding supports. |
Spot face milling for precision assembly
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When a designer follows the road of fine mechanics and precision at higher levels, he must concentrate at every detail, every potential source of inaccuracy. Such a source is the elastic deformation due to thread-bolt forces. The solution: a simple spot face. |
Dial gauge (comparator) stand error
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When using a dial indicator with a self made or commercial dial gauge (comparator) stand, it is important to place the first vertical to the measurable surface. If the dial indicator positioned with a small angle (due lack of squareness), its reading will not be the true dimension. |
Calculating sine bar slips - Method B
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Sine bar slips are usually given in the form of tables with standard sine chucks. But often lack of such tables drives engineers to calculate the required sine bar slip. |
Calculating sine bar slips - Method A
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Sine bar slips are usually given in the form of tables with standard sine chucks. But often lack of such tables drives engineers to calculate the required sine bar slip. This calculation method depends on known factors. With above dimensions angle can be calculated in a simple triangle: For sine bar calculation is the required angle which must be produced with a given sine bar length: is known from above calculation. Again, relating to a triangle, we now have related as a sine function using the sine bar: |
Protection split bushing
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Often in precision assembly (especially in gauging) we need to secure metrology equipment or precision components (which often disassembled) by means of a set screw direct clamping. This kind of clamping (tightening directly with a screw) causes surface deformation, burs and craters. |
A beveled (rocking) washer equalizes form inaccuracies
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Often in precision assembly (especially in tooling) we find difficulties to tighten components with form inaccuracies. In order to minimize total inaccuracies we have to grind all surfaces, which in turn increases the cost. |
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