Enter a nominal diameter for a hole or shaft and select a grade to view upper and lower tolerances. Calculate tolerances for diameters up to 500 mm in metric or 19.685 inches in imperial. Display values based on ISO 286 standards.
by gary davies★ 5.01 ratingsProductivity$0.99Data updated 2026-09-06
Calculate TFA, pressure drop, jet impact velocity, and hydraulic horsepower using nozzle flow area, flow rate, bit size, and mud density. Support ISO and Imperial units. Provide IADC dull grading and fixed cutter bit classification information.
Manage security processes and compliance standards
Manage information security with risk assessment tools. Track ISMS processes according to ISO standards. Conduct risk analysis and evaluate financial impacts. Set and monitor security policies.
