Engineering · Calculators
Machining calculators.
Nineteen working tools for the numbers engineers and machinists look up most — speeds and feeds, threads and fasteners, tolerances and inspection, materials, sheet metal, and job planning. Each one shows its formula and sends its result straight into a quote.
Cutting
Speed & Feed Calculator
SFM, RPM and feed rate (IPM / IPT) from material, tool diameter, flutes and tool material.
Open calculator →Material Removal Rate (MRR)
Removal rate for milling and turning from depth of cut, width of cut and feed — for cycle-time and tool-load checks.
Open calculator →Cycle Time Estimator
Rough machining cycle time from envelope volume, removal rate, feature complexity and setup time.
Open calculator →Stock Allowance
Raw-stock allowance per side for finishing and dimensional stability, from envelope, material and process.
Open calculator →Coolant Ratio / Mix
Concentrate and water volumes for any sump size and target concentration — fills, top-offs and mix checks.
Open calculator →Fasteners & threads
Tap Drill Calculator & Lookup
Tap drill size, major diameter and pitch for UNC, UNF, metric coarse and metric fine threads.
Open calculator →Thread Engagement Length
Minimum tapped-hole engagement so the internal thread doesn't strip before the bolt fails, by size and grade.
Open calculator →Bolt Torque Calculator
Recommended torque for SAE Grade 2/5/8, ISO 8.8/10.9/12.9 and stainless fasteners — dry, lubricated or anti-seize.
Open calculator →Press-Fit / Interference Fit
Contact pressure, holding force, torque capacity, hub stress and shrink-fit ΔT from diametral interference.
Open calculator →Tolerances & inspection
True Position with MMC Bonus
Position deviation (2 × √(Δx² + Δy²)) and MMC bonus tolerance for hole patterns per ASME Y14.5.
Open calculator →Tolerance Stack-Up
Tolerance accumulation across stacked dimensions — worst-case (arithmetic) and statistical (RSS).
Open calculator →Surface Finish Converter
Convert Ra ↔ Rz ↔ RMS ↔ CLA, with process attainability ranges for milling, turning, grinding and lapping.
Open calculator →Thermal Expansion Stack
Dimensional change across temperature for multi-material assemblies (ΔL = L₀ × CTE × ΔT), 25-alloy library.
Open calculator →Materials & heat treat
Material Weight Calculator
Part weight in lb and kg from box, cylinder or pipe dimensions for common machining alloys.
Open calculator →Case Hardening Depth
Effective case depth from carburizing or induction hardening — temperature, dwell time and alloy.
Open calculator →Cooling Channel Pressure Drop
Pressure drop across a machined cooling channel from geometry, flow rate and fluid — psi and bar.
Open calculator →Planning & cost
Looking for something else?
Reference charts (drill sizes, fits, hardness, threads, GD&T symbols) live in the Engineering hub, and printable one-page versions are in the cheat sheets.
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