About & method

ChiploadPro gives conservative starting points for speeds and feeds. Each value comes from the low-to-middle part of published manufacturer ranges and is cited where it's used. The full end-mill comparison is in our validation notes.

What is not sourced

• Cobalt end-mill SFM: placed between HSS and carbide; no published cobalt table was found.
• HSS ×0.7 and cobalt ×0.8 chip-load derates.
• Machine rigidity derates (−15% average, −30% light).

These are our own assumptions, labeled where they apply.

Feedback

Reports from the "Did these numbers work?" form are reviewed. Numbers change only when several independent reports agree, and never outside published ranges.

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