PT 
EN 
AR 
RU 
ES 
DE 
Thread Mill Technical Support
Welcome to SDF Precision Tools Thread Milling Technical Support Hub.
This resource is designed to help you maximize thread milling operations through essential technical guidance and best practices. Here you will find:
✓ Comprehensive speed & feed charts
✓ Application-specific guides for performance optimization
✓ Practical setup and calculation tips for precision & efficiency
Whether you’re new to thread milling or seeking process refinement, our support materials will assist you at every stage. For further assistance:
➤ Visit our social media channels
➤ Explore latest thread milling webinars
Speed and Feed Chart
When machining materials with an unfavorable length-to-diameter ratio, coarse thread pitches, or hard materials, you may need to use more radial depth passes than indicated on the speed and feed chart.
| Material | HB/Rc | Speed(SFM) Uncoated | Speed(SFM) AlTiN+ | Feed(Inches per Tooth) Tool Diameter .032 – .056 | Feed(Inches per Tooth) Tool Diameter .059 – .090 | Feed(Inches per Tooth) Tool Diameter .100 – .190 | Feed(Inches per Tooth) Tool Diameter .200 – .350 | Feed(Inches per Tooth) Tool Diameter .370 – .595 | Feed(Inches per Tooth) Tool Diameter .600+ |
|---|---|---|---|---|---|---|---|---|---|
| Cast Iron | 160 HB | 100-220 | 200-425 | .0004-.001 | .0004-.0008 | .0004-.0014 | .0004-.002 | .0004-.0035 | .0004-.006 |
| Carbon Steel | 18 Rc | 100-200 | 190-425 | .0003-.001 | .0003-.0008 | .0003-.0014 | .0003-.002 | .0003-.002 | .0003-.006 |
| Alloy Steel | 20 Rc | 80-200 | 200-375 | .0003-.001 2 Passes | .0003-.0008 3 Passes | .0003-.0014 | .0003-.0024 | .0003-.0024 | .0003-.006 |
| Tool Steel | 20 Rc | 80-175 | 175-250 | .0003-.0004 2 Passes | .0003-.0005 3 Passes | .0003-.0005 | .0003-.0009 | .0003-.0009 | .0003-.004 |
| 300 Stainless Steel | 150 HB | 90-120 | 120-255 | .0003-.0005 2 Passes | .0003-.0006 3 Passes | .0003-.0007 | .0003-.002 | .0003-.002 | .0003-.0045 |
| 400 Stainless Steel | 195 HB | 90-150 | 140-375 | .0003-.0005 2 Passes | .0003-.0006 3 Passes | .0003-.0007 | .0003-.002 | .0003-.002 | .0003-.0045 |
| High Temp Alloy (Ni & Co Base) | 20 Rc | 50-125 | 100-125 | .0003-.0004 3 Passes | .0003-.00045 3 Passes | .0003-.0005 2 Passes | .0003-.0009 | .0003-.0009 | .0003-.004 |
| Titanium | 25 Rc | 50-130 | 100-170 | .0003-.0004 3 Passes | .0003-.00045 3 Passes | .0003-.001 2 Passes | .0003-.0009 | .0003-.0009 | .0003-.003 |
| Heat Treated Alloys (38-45Rc) | 40 Rc | 50-90 | 90-150 | .0003-.0004 3 Passes | .0003-.00045 3 Passes | .0003-.0005 2 Passes | .0003-.0008 | .0003-.0008 | .0003-.0025 |
| Aluminum | 100 HB | 100-800 | 100-1200 | .0005-.0015 | .0005-.002 | .0005-.0025 | .0005-.003 | .0005-.003 | .0005-.009 |
| Brass, Zinc | 80 HB | 200-350 | 200-750 | .0005-.0015 | .0005-.0025 | .0005-.0025 | .0005-.003 | .0005-.003 | .0005-.009 |