Unit Bearing Pressure Solution

STEP 0: Pre-Calculation Summary
Formula Used
Unit Bearing Pressure = (4*Force on Unit)/(pi*Number of Threads*(Nominal Diameter^2-Core Diameter^2))
Sb = (4*F)/(pi*n*(dn^2-Dc^2))
This formula uses 1 Constants, 5 Variables
Constants Used
pi - Archimedes' constant Value Taken As 3.14159265358979323846264338327950288
Variables Used
Unit Bearing Pressure - (Measured in Pascal) - Unit Bearing Pressure is the average pressure acting on the contact surface of the thread in a Screw-Nut pair.
Force on Unit - (Measured in Newton) - Force on Unit is any interaction that, when unopposed, will change the motion of an object. In other words, a force can cause an object with mass to change its velocity.
Number of Threads - Number of Threads is total no. of threads in a screw.
Nominal Diameter - (Measured in Meter) - Nominal Diameter is the actual diameter of the screw.
Core Diameter - (Measured in Meter) - Core Diameter is defined as the smallest diameter of the thread of the screw or nut. The term “minor diameter” replaces the term “core diameter” as applied to the thread of a screw.
STEP 1: Convert Input(s) to Base Unit
Force on Unit: 0.0002 Kilonewton --> 0.2 Newton (Check conversion ​here)
Number of Threads: 16 --> No Conversion Required
Nominal Diameter: 18 Millimeter --> 0.018 Meter (Check conversion ​here)
Core Diameter: 8 Millimeter --> 0.008 Meter (Check conversion ​here)
STEP 2: Evaluate Formula
Substituting Input Values in Formula
Sb = (4*F)/(pi*n*(dn^2-Dc^2)) --> (4*0.2)/(pi*16*(0.018^2-0.008^2))
Evaluating ... ...
Sb = 61.213439650729
STEP 3: Convert Result to Output's Unit
61.213439650729 Pascal --> No Conversion Required
FINAL ANSWER
61.213439650729 61.21344 Pascal <-- Unit Bearing Pressure
(Calculation completed in 00.004 seconds)

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Pressure Calculators

Unit Bearing Pressure in Terms of Sommerfeld Number of Bearing
​ LaTeX ​ Go Unit bearing pressure for bearing = (((Radius of Journal/Radial clearance for bearing)^2)*Dynamic Viscosity of Lubricant*Journal Speed)/(2*pi*Sommerfeld Number of Journal Bearing)
Pressure Difference in Terms of Flow of Lubricant
​ LaTeX ​ Go Pressure difference between slot sides = Length of slot in direction of flow*12*Dynamic Viscosity of Lubricant*Flow of lubricant from slot/((Oil film thickness^3)*Breadth of slot for oil flow)
Unit Bearing Pressure in Terms of Temperature Rise Variable
​ LaTeX ​ Go Unit bearing pressure for bearing = Density of Lubricating Oil*Specific heat of bearing oil*Temperature rise of bearing lubricant/Temperature Rise Variable
Unit Bearing Pressure in Terms of Radial Load Acting on Bearing
​ LaTeX ​ Go Unit bearing pressure for bearing = Radial load acting on sliding bearing/(Axial Length of Bearing*Journal Diameter)

Unit Bearing Pressure Formula

​LaTeX ​Go
Unit Bearing Pressure = (4*Force on Unit)/(pi*Number of Threads*(Nominal Diameter^2-Core Diameter^2))
Sb = (4*F)/(pi*n*(dn^2-Dc^2))

What is unit bearing pressure ?

Unit bearing pressure is permissible bearing pressure which is in terms of force, teeth and area of contacting surface.

How to Calculate Unit Bearing Pressure?

Unit Bearing Pressure calculator uses Unit Bearing Pressure = (4*Force on Unit)/(pi*Number of Threads*(Nominal Diameter^2-Core Diameter^2)) to calculate the Unit Bearing Pressure, The unit bearing pressure is the bearing pressure of contacting surfaces of the screw and the nut. Unit Bearing Pressure is denoted by Sb symbol.

How to calculate Unit Bearing Pressure using this online calculator? To use this online calculator for Unit Bearing Pressure, enter Force on Unit (F), Number of Threads (n), Nominal Diameter (dn) & Core Diameter (Dc) and hit the calculate button. Here is how the Unit Bearing Pressure calculation can be explained with given input values -> 61.21344 = (4*0.2)/(pi*16*(0.018^2-0.008^2)).

FAQ

What is Unit Bearing Pressure?
The unit bearing pressure is the bearing pressure of contacting surfaces of the screw and the nut and is represented as Sb = (4*F)/(pi*n*(dn^2-Dc^2)) or Unit Bearing Pressure = (4*Force on Unit)/(pi*Number of Threads*(Nominal Diameter^2-Core Diameter^2)). Force on Unit is any interaction that, when unopposed, will change the motion of an object. In other words, a force can cause an object with mass to change its velocity, Number of Threads is total no. of threads in a screw, Nominal Diameter is the actual diameter of the screw & Core Diameter is defined as the smallest diameter of the thread of the screw or nut. The term “minor diameter” replaces the term “core diameter” as applied to the thread of a screw.
How to calculate Unit Bearing Pressure?
The unit bearing pressure is the bearing pressure of contacting surfaces of the screw and the nut is calculated using Unit Bearing Pressure = (4*Force on Unit)/(pi*Number of Threads*(Nominal Diameter^2-Core Diameter^2)). To calculate Unit Bearing Pressure, you need Force on Unit (F), Number of Threads (n), Nominal Diameter (dn) & Core Diameter (Dc). With our tool, you need to enter the respective value for Force on Unit, Number of Threads, Nominal Diameter & Core Diameter and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.
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