沉頭孔深度計算器
Calculate axial countersink depth from the entry-hole diameter, countersink top diameter and included angle.
結果是根據上述輸入參數計算得出的；範例數值僅供說明之用，並非針對特定工具的速度／進給建議。.
公式與計算方法
Depth = (top diameter − hole diameter) / [2 tan(included angle / 2)].
An ideal countersink is a conical enlargement above an existing hole. The axial depth follows directly from the difference between the outer and inner diameters and half the included cone angle. Common included angles include 82°, 90° and 100° but the value must match the fastener and tool geometry.
重要假設與限制
Geometric depth only. Does not include tool tip truncation, chamfer edges, runout, fastener seating tolerances or actual tool offset. Verify diameter and seating with the drawing.
常見問題
Does a 90° countersink need the same depth as an 82° one?
No. Cone angle changes the axial depth for the same diameter difference.
Should I program this directly as Z depth?
Not without accounting for tool geometry, work offset and how the tool is measured.
技術參考資料： Machining Doctor — Online Machining Calculators. 針對 ONMY 的計算是獨立進行的；來源連結並不代表任何背書。.
