Ratio factor for external gears Solution

STEP 0: Pre-Calculation Summary
Formula Used
Ratio Factor = 2*Number of teeth of the Gear/(Number of teeth of the Gear+Number of Teeth on Spur Pinion)
Qg = 2*Zg/(Zg+zp)
This formula uses 3 Variables
Variables Used
Ratio Factor - The Ratio Factor for Gear is the ratio of twice gear teeth to the sum of gear and pinion of gear teeth, considering a formative number of teeth.
Number of teeth of the Gear - Number of teeth of the Gear is defined as the number of teeth on gear.
Number of Teeth on Spur Pinion - Number of Teeth on Spur Pinion is the total number of teeth on the periphery of the smaller gear or also known as the pinion.
STEP 1: Convert Input(s) to Base Unit
Number of teeth of the Gear: 30 --> No Conversion Required
Number of Teeth on Spur Pinion: 12 --> No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
Qg = 2*Zg/(Zg+zp) --> 2*30/(30+12)
Evaluating ... ...
Qg = 1.42857142857143
STEP 3: Convert Result to Output's Unit
1.42857142857143 --> No Conversion Required
FINAL ANSWER
1.42857142857143 <-- Ratio Factor
(Calculation completed in 00.001 seconds)

Credits

Created by Ojas Kulkarni
Sardar Patel College of Engineering (SPCE), Mumbai
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Indian Institute of Technology Kharagpur (IIT KGP), Kharagpur
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Ratio factor for external gears Formula

Ratio Factor = 2*Number of teeth of the Gear/(Number of teeth of the Gear+Number of Teeth on Spur Pinion)
Qg = 2*Zg/(Zg+zp)

What are external gears?

An external gear is a gear which has its teeth formed on the outer surface of a cylinder or cone. The teeth of an external spur gear point outwards the center.

How to Calculate Ratio factor for external gears?

Ratio factor for external gears calculator uses Ratio Factor = 2*Number of teeth of the Gear/(Number of teeth of the Gear+Number of Teeth on Spur Pinion) to calculate the Ratio Factor, Ratio factor for external gears is defined as the ratio of number of teeth on gear to the sum of number of teeth on gear and pinion. Ratio Factor is denoted by Qg symbol.

How to calculate Ratio factor for external gears using this online calculator? To use this online calculator for Ratio factor for external gears, enter Number of teeth of the Gear (Zg) & Number of Teeth on Spur Pinion (zp) and hit the calculate button. Here is how the Ratio factor for external gears calculation can be explained with given input values -> 1.428571 = 2*30/(30+12).

FAQ

What is Ratio factor for external gears?
Ratio factor for external gears is defined as the ratio of number of teeth on gear to the sum of number of teeth on gear and pinion and is represented as Qg = 2*Zg/(Zg+zp) or Ratio Factor = 2*Number of teeth of the Gear/(Number of teeth of the Gear+Number of Teeth on Spur Pinion). Number of teeth of the Gear is defined as the number of teeth on gear & Number of Teeth on Spur Pinion is the total number of teeth on the periphery of the smaller gear or also known as the pinion.
How to calculate Ratio factor for external gears?
Ratio factor for external gears is defined as the ratio of number of teeth on gear to the sum of number of teeth on gear and pinion is calculated using Ratio Factor = 2*Number of teeth of the Gear/(Number of teeth of the Gear+Number of Teeth on Spur Pinion). To calculate Ratio factor for external gears, you need Number of teeth of the Gear (Zg) & Number of Teeth on Spur Pinion (zp). With our tool, you need to enter the respective value for Number of teeth of the Gear & Number of Teeth on Spur Pinion and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.
How many ways are there to calculate Ratio Factor?
In this formula, Ratio Factor uses Number of teeth of the Gear & Number of Teeth on Spur Pinion. We can use 1 other way(s) to calculate the same, which is/are as follows -
  • Ratio Factor = 2*Number of teeth of the Gear/(Number of teeth of the Gear-Number of Teeth on Spur Pinion)
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