This page is a complete CNC calculation and machining system.
It allows machinists to calculate, compare, and optimize machining parameters instantly.
Designed as a practical tool, not just a guide.
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SECTION 1 — RPM CALCULATOR
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Formula
RPM = (Cutting Speed × 1000) / (π × Tool Diameter)
Example
Cutting Speed = 300
Tool Diameter = 10mm
RPM ≈ 9550
USE
Adjust RPM based on material and tool size.
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SECTION 2 — FEEDRATE CALCULATOR
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Formula
Feed = RPM × Flutes × Chip Load
Example
RPM = 10000
Flutes = 2
Chip Load = 0.04
Feed = 800 mm/min
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SECTION 3 — MATERIAL REMOVAL RATE (MRR)
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Formula
MRR = Width × Depth × Feed
Example
Width = 5mm
Depth = 2mm
Feed = 800
MRR = 8000 mm³/min
Higher MRR = faster machining.
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SECTION 4 — CUTTING TIME CALCULATOR
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Formula
Time = Length / Feed
Example
Length = 100mm
Feed = 500
Time = 0.2 min
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SECTION 5 — TOOL SELECTION ENGINE
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INPUT
Material + Operation
OUTPUT
Aluminum → 2 flute
Steel → 4 flute
Finishing → ball nose
Roughing → flat end mill
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SECTION 6 — FEEDS & SPEEDS MASTER TABLE
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ALUMINUM
RPM → 8000 – 18000
Feed → high
Chip load → 0.03 – 0.08
STEEL
RPM → 2000 – 6000
Feed → medium
Chip load → 0.02 – 0.05
STAINLESS
RPM → 1500 – 4000
Feed → low
Chip load → 0.01 – 0.03
TITANIUM
RPM → 800 – 2500
Feed → controlled
Chip load → 0.01 – 0.02
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SECTION 7 — CNC TOOL DATABASE
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End mills
Drills
Face mills
Ball nose cutters
Chamfer tools
Thread mills
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SECTION 8 — INSERT SELECTION SYSTEM
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Aluminum → sharp inserts
Steel → coated carbide
Stainless → strong inserts
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SECTION 9 — COOLANT SELECTION SYSTEM
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Flood → standard
Mist → light work
Air → chip removal
Dry → special cases
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SECTION 10 — PROBLEM FIX ENGINE
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Tool break → reduce feed
Chatter → reduce RPM
Bad finish → reduce feed
Wrong size → adjust offset
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SECTION 11 — ADVANCED CALCULATIONS
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Surface Speed
Vc = (π × D × RPM) / 1000
Power
Power = Torque × RPM
Torque depends on cutting force and tool radius.
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SECTION 12 — SMART DECISION SYSTEM
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If tool breaks → reduce load
If chatter → improve rigidity
If slow machining → increase feed
If overheating → improve cooling
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SECTION 13 — CNC MASTER CHECKLIST
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✔ correct RPM
✔ correct feed
✔ tool selection
✔ coolant active
✔ offsets correct
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FINAL PRINCIPLE
CNC machining is based on calculations.
When RPM, feedrate, tool selection, and material are balanced, machining becomes efficient, stable, and predictable.
This system allows machinists to calculate and optimize everything in one place.
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