OUJI ENGINEERING TOOLS
Engineering calculators for drawings, machining and inspection.
Focused tools for engineers and technical buyers. Instant browser-based results with no sign-in and no project data upload.WEIGHT · DENSITY · USD/KGMaterial weight & cost calculatorCalculate block, solid round bar or hollow tube weight and raw material price from dimensions and an editable per-kilogram rate.Open tool →ISO 286 · FITS & LIMITSFits & tolerance calculatorCalculate hole and shaft limits, deviations, and clearance, transition or interference fit ranges.Open tool →ASME B18.6.3 · 82° COUNTERSINKSANSI countersunk hole calculatorLook up verified flat-head machine-screw dimensions and calculate an ideal countersink diameter, depth and breakout check.Open tool →GB/T 3 · GB/T 6403.5Thread & shoulder relief groove calculatorLook up thread withdrawal grooves by pitch or shaft-shoulder grinding relief options by diameter without interpolation.Open tool →ISO 2768-1 · GENERAL TOLERANCESGeneral tolerance calculatorLook up ISO 2768 f, m, c and v limits or apply a decimal-inch drawing title-block tolerance.Open tool →GD&T · POSITION · MMC / LMCTrue position & bonus toleranceCalculate diametrical true position, MMC or LMC bonus, virtual condition, tolerance usage and feature acceptance.Open tool →