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Length of Arc of Contact is the ratio of length of path of contact and the cosine of the pressure angle. Check FAQs
L=Pcos(Φg)
L - Length of Arc of Contact?P - Path of Contact?Φg - Pressure Angle of Gear?

Length of Arc of Contact Example

With values
With units
Only example

Here is how the Length of Arc of Contact equation looks like with Values.

Here is how the Length of Arc of Contact equation looks like with Units.

Here is how the Length of Arc of Contact equation looks like.

14.1221Edit=11.9762Editcos(32Edit)
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Length of Arc of Contact Solution

Follow our step by step solution on how to calculate Length of Arc of Contact?

FIRST Step Consider the formula
L=Pcos(Φg)
Next Step Substitute values of Variables
L=11.9762mmcos(32°)
Next Step Convert Units
L=0.012mcos(0.5585rad)
Next Step Prepare to Evaluate
L=0.012cos(0.5585)
Next Step Evaluate
L=0.0141220528107761m
Next Step Convert to Output's Unit
L=14.1220528107761mm
LAST Step Rounding Answer
L=14.1221mm

Length of Arc of Contact Formula Elements

Variables
Functions
Length of Arc of Contact
Length of Arc of Contact is the ratio of length of path of contact and the cosine of the pressure angle.
Symbol: L
Measurement: LengthUnit: mm
Note: Value should be greater than 0.
Path of Contact
Path of Contact is the path traced by the contact point of a pair of tooth profiles.
Symbol: P
Measurement: LengthUnit: mm
Note: Value should be greater than 0.
Pressure Angle of Gear
Pressure Angle of Gear also known as the angle of obliquity is the angle between the tooth face and the gear wheel tangent.
Symbol: Φg
Measurement: AngleUnit: °
Note: Value should be greater than 0.
cos
Cosine of an angle is the ratio of the side adjacent to the angle to the hypotenuse of the triangle.
Syntax: cos(Angle)

Other Formulas to find Length of Arc of Contact

​Go Maximum Length of Arc of Contact
L=(r+Rw)tan(α)
​Go Maximum Length of Arc of Approach
L=(Rw+r)tan(Φg)

Other formulas in Length category

​Go Length of Path of Approach
P1=Ra2-Rw2(cos(Φg))2-Rwsin(Φg)
​Go Length of Path of Contact
P=Ra2-Rw2(cos(Φg))2+ra2-r2(cos(Φg))2-(Rw+r)sin(Φg)
​Go Length of Path of Recess
P2=ra2-r2(cos(Φg))2-rsin(Φg)
​Go Maximum Length of Path of Approach
P1=rsin(Φg)

How to Evaluate Length of Arc of Contact?

Length of Arc of Contact evaluator uses Length of Arc of Contact = Path of Contact/cos(Pressure Angle of Gear) to evaluate the Length of Arc of Contact, Length of Arc of Contact formula is defined as a measure of the distance along the circumference of a gear that is in contact with another gear during rotation, providing insight into the gear's rotational motion and interaction with other gears in a mechanical system. Length of Arc of Contact is denoted by L symbol.

How to evaluate Length of Arc of Contact using this online evaluator? To use this online evaluator for Length of Arc of Contact, enter Path of Contact (P) & Pressure Angle of Gear g) and hit the calculate button.

FAQs on Length of Arc of Contact

What is the formula to find Length of Arc of Contact?
The formula of Length of Arc of Contact is expressed as Length of Arc of Contact = Path of Contact/cos(Pressure Angle of Gear). Here is an example- 14122.05 = 0.01197618/cos(0.55850536063808).
How to calculate Length of Arc of Contact?
With Path of Contact (P) & Pressure Angle of Gear g) we can find Length of Arc of Contact using the formula - Length of Arc of Contact = Path of Contact/cos(Pressure Angle of Gear). This formula also uses Cosine function(s).
What are the other ways to Calculate Length of Arc of Contact?
Here are the different ways to Calculate Length of Arc of Contact-
  • Length of Arc of Contact=(Radius of Pitch Circle of Pinion+Radius of Pitch Circle of Wheel)*tan(Pressure Angle Of 2 Gears)OpenImg
  • Length of Arc of Contact=(Radius of Pitch Circle of Wheel+Radius of Pitch Circle of Pinion)*tan(Pressure Angle of Gear)OpenImg
Can the Length of Arc of Contact be negative?
Yes, the Length of Arc of Contact, measured in Length can be negative.
Which unit is used to measure Length of Arc of Contact?
Length of Arc of Contact is usually measured using the Millimeter[mm] for Length. Meter[mm], Kilometer[mm], Decimeter[mm] are the few other units in which Length of Arc of Contact can be measured.
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