🖨️ Sizing Engine P4
CNC Feeds & Speeds Calculator
In short, Protect expensive solid carbide end mills from snapping and eliminate workpiece burn marks. Calculate precise RPM, linear feed rates, and chip load per tooth.
1. Workpiece & Tooling Geometry
2. Spindle Speed & Machine Rigidity
Balanced
1: Conservative (Desktop/Hobby) | 2: Balanced | 3: Aggressive (Rigid Production)
Baseline Cutting Speeds & Chip Load Reference (1/4" 2-Flute Carbide)
| Material | Surface Speed (SFM) | Chip Load per Tooth (in) | Recommended 18,000 RPM Feed | Tooling Style |
|---|---|---|---|---|
| Softwood & MDF | 800 – 1,200 SFM | 0.0050" – 0.0080" | 180 – 280 IPM (4,500 – 7,100 mm/min) | 2-Flute Upcut or Downcut |
| Hardwood (Oak, Maple) | 600 – 900 SFM | 0.0035" – 0.0055" | 125 – 200 IPM (3,200 – 5,000 mm/min) | 2-Flute Compression |
| Cast Acrylic / Plexiglass | 400 – 700 SFM | 0.0025" – 0.0040" | 90 – 140 IPM (2,300 – 3,500 mm/min) | 1-Flute Spiral O-Flute (Crucial) |
| Aluminum 6061-T6 | 600 – 1,000 SFM | 0.0010" – 0.0020" | 35 – 70 IPM (900 – 1,800 mm/min) | 1-Flute or 2-Flute ZrN Coated Carbide |
Frequently Asked Questions
How accurate are these engineering numbers?
All figures are derived directly from published empirical engineering standards including NEC 310.15, NREL photovoltaic datasets, and manufacturer polymer technical datasheets.
Are calculations processed on a remote server?
No. Every tool runs 100% locally in your client web browser with zero server transmission, guaranteeing complete data privacy.