Cutting Data & Tap Drill Calculator
Convert cutting speed to spindle speed, feed per tooth to feed rate, plus metric tap drill size and theoretical surface roughness.
Sample input is pre-filled and editable. Everything runs locally in your browser — nothing is uploaded.
n = 1000·Vc/(π·D), vf = fz·z·n
FAQ
D − P is a rule of thumb for cutting taps, giving roughly 60–70% thread height (not 75%). Check the tap maker table for material and tap type; form taps need a larger hole.
Ra ≈ f²/(32r) models the turning nose-radius scallop; for milling it is only a trend indicator. Vibration, built-up edge, runout and wear are excluded — measure the real surface.
How to use
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- 转速：
n = 1000 · Vc / (π · D)，Vc 由刀具厂商推荐表给出，D 为刀具直径（铣削）或工件直径（车削）。 - 进给：
vf = fz · z · n，fz 为每齿进给，z 必须是正整数齿数。 - 攻丝底孔：
D − P，仅适用于切削丝锥的经验近似；挤压丝锥请查厂商表。 - 理论粗糙度：
Ra ≈ f² / (32 · r)，f 为每转进给，r 为刀尖圆弧半径，主要适用于车削几何模型。
所有计算为工程估算，实际加工请以刀具样本、机床刚性与试切结果为准。