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Related to lead angle: helix angle

[′lēd ‚aŋ·gəl]
(design engineering)
The angle that the tangent to a helix makes with the plane normal to the axis of the helix.
(metallurgy)
The angle at the point of welding between an electrode and a line perpendicular to the weld axis.
(ordnance)
The angle between the line of sight to a moving target and the line of sight to a point ahead of the target.
A dropping angle.
(physics)
The phase difference between a sinusoidally varying quantity and a reference quantity which varies sinusoidally at the same frequency, when this phase difference is positive. Also known as angle of lead; lead; phase lead.

i. The angle by which an allowance is made for the radius of turn to enable the aircraft to role out on the desired track. The aircraft must commence its turn to the track before reaching it; otherwise, the aircraft will overshoot the desired track. This lead angle depends on the true air speed (TAS), distance, wind velocity, and aircraft rate of turn. In a given time out, its value is constant irrespective of the TAS.
ii. The angular difference between the line of sight and an aiming line. Also called the angle of lead
References in periodicals archive ?
However, a small lead angle prevents the cutting edge from reaching the shoulder and will provide long, curved chips that are difficult to control.
Parameter Value Length of the screw 1000 mm Diameter of the screw (d) 32 mm Lead of the screw (l) 25 mm Lead angle of ball screw (a) 13.
Given my 50 years of experience in the oil seal industry, it is very exciting to see that Bruker has come up with an innovative, non-contact measurement for shaft lead angle.
Taking into account the effect of lead angle into consideration only for the nodes on pressure flank, three dimensional analysis involved can be executed using two dimensional mesh pattern, with each node having three degrees of freedom.
The story that came out of Houston was dismayingly similar to the story and lead angle reported when the president's Initiative on Race was launched with a televised town hall meeting in Ohio.
TUCSON, Arizona -- Bruker Corporation (NASDAQ: BRKR) announced today the NPFLEX-LA[TM], the first non-contact, three-dimensional surface metrology system to provide quantitative lead angle and surface texture measurements for the control and reduction of fluid leakage of rotary dynamic sealing surfaces.
With a round in sert, there is really no "true" lead angle as it changes based upon the varying depth of cut.

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