FREE INTERACTIVE CNC TOOL

Bolt-Hole Circle & Helical Milling Generator

Generate controller-specific CNC macro programs and inspect the machining sequence with an animated 3D toolpath preview. Configure the BHC diameter, number of holes, cutter size, pitch and depth directly in your browser.

FanucHaasSiemens3D toolpath previewDownloadable NC output
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FREE COMPLETE 3D SIMULATOR

Eccentric Turning Macro Visualizer

Configure an eccentric turning cycle and use the complete synchronized chuck, workpiece, tool and toolpath simulation. Code generation is reserved for CNC Automation Pro customers.

FanucHaasMazakMitsubishiGSKSiemensHeidenhainComplete 3D simulationUnlimited simulator use
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FREE INTERACTIVE CNC TOOL

CNC Thread Depth & Fit Visualizer

Enter the nominal metric thread diameter and pitch, then calculate separate ISO 6g / 6H machining limits for both mating parts. Enter measured bolt and nut dimensions to estimate or verify the assembled fit.

External and internal calculationsISO Metric 6g / 6H limitsNominal vs machining dimensionsMating bolt and nut dimensionsThread machining depthPitch-based screw travelWhole nut green / red resultCompletely free CNC resource
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RCTF CALCULATOR – RADIAL CHIP THINNING TOOL

Take full control of your CNC cutting performance with this powerful RCTF (Radial Chip Thinning Factor) calculator. This software automatically calculates the correct chip thinning compensation when machining with light radial engagement, ensuring your feedrates are optimized instead of undercutting tool performance.

Simply enter your tool diameter, radial depth, material, RPM, and feed per tooth — the app instantly calculates the correct adjustment and outputs optimized cutting values. This helps increase material removal rates, improve surface finish, and extend tool life without risking tool damage.

Built for real machining environments, the calculator includes a wide range of material presets, supports both metric and imperial units, and provides fast, accurate results in real time.

Whether you’re a CNC machinist, programmer, or engineer, this tool removes guesswork and gives you confidence in every cut.

Included FREE with CNC Automation Pro – 2026

Get this software included with full Macromill membership and unlock the complete CNC automation platform.

✔ Included with full package
✔ Access to all CNC software tools
✔ Future updates included
✔ One-time access — no subscription

FREE CNC CALCULATOR

RCTF Calculator – Radial Chip Thinning Tool

Calculate the correct chip-thinning compensation for light radial engagement. Enter cutter diameter, radial depth, material, RPM and feed per tooth to generate optimized cutting values for stronger tool performance, surface finish and tool life.

Nominal vs machining dimensionsMaterial presetsCorrected feed per toothOptimized feedrateInstant offline calculationFree download
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Also included with CNC Automation Pro — future updates included.

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