It seems like you’re asking about vertical milling with a 2.0 mm tool and adjusting the number of flutes (3 to 3.5). However, the “number 3 to 3.5” part is unclear—typically, end mills have whole numbers of flutes (e.g., 2, 3, or 4).
Here’s how to interpret and optimize your milling parameters for a 2.0 mm diameter end mill:
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Key Considerations for Vertical Milling with a 2.0 mm End Mill
1. Flute Count (Assuming You Meant Flutes)
– 3-flute: Good balance between chip evacuation and strength; ideal for aluminum and non-ferrous metals.
– 4-flute: Better for steel and harder materials but may clog in softer metals.
– *(A 3.5-flute design is unusual—likely a typo or misunderstanding.)*
2. Recommended Cutting Parameters
– Material Matters: Adjust speeds/feeds based on workpiece material:
– Aluminum:
– RPM: ~12,000–18,000
– Feed Rate: ~300–600 mm/min (0.03–0.05 mm/tooth)
– Steel (Mild):
– RPM: ~6,000–8,000
– Feed Rate: ~150–300 mm/min (0.02–0.04 mm/tooth)
3. Depth of Cut (DOC) & Width of Cut (WOC)
– For a 2.0 mm tool:
– Axial DOC: ≤1× diameter (~1–2 mm)
– Radial WOC: ≤50% diameter (~0.5–1 mm)
4. Tool Holding & Runout
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e a precision collet (e.g., ER-16 or ER-20) to minimize runout (<0.01 mm).
If You Meant Something Else by "Number 3 to 3.5"
– If referring to stepover percentage, try 30–35% of tool diameter (~0.6–0.7 mm).
– If discussing tool numbering, clarify if it’s a specific manufacturer’s code.
Would you like help with a specific material or operation (e.g., slotting,