Optimising vs CNC Machinist Calculator

Optimising from Guhring is designed to assist you to optimise the performance of rotary cutting tools such as drills, taps, milling cutters and reamers.

CNC Machinist Calculator — speeds & feeds, power, fits, tool life and G-code in your pocket. Works offline. Enter a tool and a material and get spindle RPM, feed rate, cut time and machine power in one second — metric or inch, with the formula and its source shown under every result. Free, no limits, no ads Milling, Drilling and Turning Speed & Feed Drill size and tap drill charts (letter, number, metric, fractional) G- and M-code reference with examples Pro — 7-day free trial on the yearly plan Milling, Drilling and Turning Power & Torque (MRR, kW/hp, N·m) Tolerance & Fit — ISO 286 limits and deviations from the standard tables, with inch display per ANSI B4.2 Turning Surface Roughness, Thread Milling with centre-line feed compensation Tool Life (Taylor), Coolant Flow & Nozzle, Ball-nose Step-over Chip Load & Deflection — HSM chip thinning, cutting forces, bending stress, chatter risk Cycle Time & Cost — cost per part from cutting time, setup, batch size, tool cost and shop rate G-code generators: bolt circle, grid, linear pattern, 3-point arc — safe Fanuc-style header, Z clearance, G81/G82/G83 Machine profile — results capped to your spindle's RPM, power and feed Tool library and your own materials with personal Vc, fz and kc Setup-sheet history, export to CSV and PDF Materials done properly 38 workpiece materials in ISO groups P/M/K/N/S/H — steels, stainless, cast iron, aluminium, brass, plastics, titanium, Inconel, hardened steel — each with separate starting values for HSS and carbide, specific cutting force kc, and coating factors (TiN, TiCN, TiAlN, AlCrN, DLC) with warnings when a coating does not suit the material. Built on real formulas Machinery's Handbook speeds and feeds, ISO 286-1/2 tolerance tables, ISO 68-1 thread geometry, Qu & Shih circular-cusp Ra, Taylor tool life, Bernoulli nozzle flow. The engine is covered by 200+ automated tests. Catalogue values are starting points — always confirm with your insert maker's data. Pricing Pro Monthly $1.99/month, Pro Yearly $7.99/year, or Lifetime $14.99 one-time. Subscriptions are charged to your Apple ID and renew automatically unless cancelled at least 24 hours before the end of the current period; manage them in Settings. Existing Remove Ads buyers keep full Pro. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.freeprivacypolicy.com/live/a849d8e9-1345-4ba8-a196-7cb1d4065a55