5 calculators in this category
- Bolt Circle CalculatorPolar to rectangular conversionA bolt circle is specified by a diameter and a hole count, but a mill needs X and Y for every hole. Enter the circle, how many…
- Sine Bar CalculatorH = L · sin θA sine bar turns an angle into a height you can measure with gauge blocks. The rule is exact: stack height equals the bar's…
- Lathe Taper CalculatorTaper geometryA taper is usually specified as two diameters and the length between them, but nothing on a lathe is set that way. The compound…
- ISO Hole & Shaft Fit Tolerance CalculatorISO 286-1 / ISO 286-2 (hole-basis limits and fits)A drawing that says ø40 H7/g6 is making four separate statements about size, and this calculator unpacks all of them…
- Surface Finish Calculator (Ra from Feed)Theoretical cusp roughnessThe finish a turned or milled surface carries is set almost entirely by two numbers: how far the tool advances each revolution…
Which one do you need?
- Bolt Circle Calculator
- Get the X and Y coordinates of every hole on a bolt circle from the diameter, hole count and start angle, with the chord distance between adjacent holes.
- Sine Bar Calculator
- Find the gauge block stack a sine bar needs for any angle, or the angle a given stack produces, with the block combination from a standard 81-piece set.
- Lathe Taper Calculator
- Convert two diameters and a length into taper per inch and per foot, the included and half angles, the compound rest setting and the tailstock offset.
- ISO Hole & Shaft Fit Tolerance Calculator
- Work out hole and shaft limits, maximum and minimum clearance or interference, and the fit class for ISO 286 symbols such as H7/g6, H7/k6 and H7/p6.
- Surface Finish Calculator (Ra from Feed)
- Predict the Ra, Rz and RMS finish a feed rate and tool nose radius will leave, or work backwards to the feed that hits a target surface finish.