Lead (engineering)

（重定向自Lead angle）

Definition of lead per ANSI/AGMA 1012-G05

Definition of lead angle per ANSI/AGMA 1012-G05

Depiction of the lead angle of a screw thread. dm is the mean diameter of the screw thread.

Lead is the axial advance of a helix or screw during one complete turn (360°) The lead for a screw thread is the axial travel for a single revolution.

Pitch is defined as the axial distance between adjacent threads on a helix or screw. In most screws, called "single start" screws, which have a single helical thread along their length, the lead and pitch are equal. They only differ in "multiple start" screws, which have several intertwined threads. In these screws, the lead is equal to the pitch multiplied by the number of "starts".

单词	Lead angle
释义	Lead angle 英语百科 Lead (engineering) （重定向自Lead angle） Lead is the axial advance of a helix or screw during one complete turn (360°) The lead for a screw thread is the axial travel for a single revolution. Pitch is defined as the axial distance between adjacent threads on a helix or screw. In most screws, called "single start" screws, which have a single helical thread along their length, the lead and pitch are equal. They only differ in "multiple start" screws, which have several intertwined threads. In these screws, the lead is equal to the pitch multiplied by the number of "starts".
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