Addendum of Rack Formula

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Addendum of rack is the height by which a tooth of a gear projects beyond (outside for external, or inside for internal) the standard pitch circle or pitch line. Check FAQs
AR=Zp(sin(Φgear))22
AR - Addendum of Rack?Zp - Number of Teeth on Pinion?Φgear - Pressure Angle of Gear?

Addendum of Rack Example

With values
With units
Only example

Here is how the Addendum of Rack equation looks like with Values.

Here is how the Addendum of Rack equation looks like with Units.

Here is how the Addendum of Rack equation looks like.

1123.2577Edit=8Edit(sin(32Edit))22
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Addendum of Rack Solution

Follow our step by step solution on how to calculate Addendum of Rack?

FIRST Step Consider the formula
AR=Zp(sin(Φgear))22
Next Step Substitute values of Variables
AR=8(sin(32°))22
Next Step Convert Units
AR=8(sin(0.5585rad))22
Next Step Prepare to Evaluate
AR=8(sin(0.5585))22
Next Step Evaluate
AR=1.12325770642147m
Next Step Convert to Output's Unit
AR=1123.25770642147mm
LAST Step Rounding Answer
AR=1123.2577mm

Addendum of Rack Formula Elements

Variables
Functions
Addendum of Rack
Addendum of rack is the height by which a tooth of a gear projects beyond (outside for external, or inside for internal) the standard pitch circle or pitch line.
Symbol: AR
Measurement: LengthUnit: mm
Note: Value should be greater than 0.
Number of Teeth on Pinion
Number of teeth on pinion is the count of teeth on pinion.
Symbol: Zp
Measurement: NAUnit: Unitless
Note: Value should be greater than 0.
Pressure Angle of Gear
The pressure angle of gear also known as the angle of obliquity is the angle between the tooth face and the gear wheel tangent.
Symbol: Φgear
Measurement: AngleUnit: °
Note: Value should be greater than 0.
sin
Sine is a trigonometric function that describes the ratio of the length of the opposite side of a right triangle to the length of the hypotenuse.
Syntax: sin(Angle)

Other formulas in Toothed Gear Terminologies category

​Go Torque Exerted on Gear Shaft
τ=Ptdpitch circle2
​Go Work Output on Driven
w=Rcos(α2+Φ)πd2N2
​Go Work Output on Driver
w=Rcos(α1-Φ)πd1N1
​Go Addendum of Pinion
Ap=Zp2(1+TZp(TZp+2)(sin(Φgear))2-1)

How to Evaluate Addendum of Rack?

Addendum of Rack evaluator uses Addendum of Rack = (Number of Teeth on Pinion*(sin(Pressure Angle of Gear))^2)/2 to evaluate the Addendum of Rack, Addendum of Rack formula is defined as the radial distance from the pitch circle to the top land of a tooth in a toothed gear, which is a critical parameter in gear design and manufacturing, as it affects the gear's strength, durability, and overall performance. Addendum of Rack is denoted by AR symbol.

How to evaluate Addendum of Rack using this online evaluator? To use this online evaluator for Addendum of Rack, enter Number of Teeth on Pinion (Zp) & Pressure Angle of Gear gear) and hit the calculate button.

FAQs on Addendum of Rack

What is the formula to find Addendum of Rack?
The formula of Addendum of Rack is expressed as Addendum of Rack = (Number of Teeth on Pinion*(sin(Pressure Angle of Gear))^2)/2. Here is an example- 1.1E+6 = (8*(sin(0.55850536063808))^2)/2.
How to calculate Addendum of Rack?
With Number of Teeth on Pinion (Zp) & Pressure Angle of Gear gear) we can find Addendum of Rack using the formula - Addendum of Rack = (Number of Teeth on Pinion*(sin(Pressure Angle of Gear))^2)/2. This formula also uses Sine (sin) function(s).
Can the Addendum of Rack be negative?
Yes, the Addendum of Rack, measured in Length can be negative.
Which unit is used to measure Addendum of Rack?
Addendum of Rack is usually measured using the Millimeter[mm] for Length. Meter[mm], Kilometer[mm], Decimeter[mm] are the few other units in which Addendum of Rack can be measured.
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