Helix Angle of Power Screw given Effort Required to Lift Load Calculator

✖Effort in lifting load is the force required to overcome the resistance to lift the load.ⓘ Effort in lifting load [P_li]			+10% -10%
✖Load on screw is defined as the weight (force) of the body that is acted upon the screw threads.ⓘ Load on screw [W]			+10% -10%
✖Coefficient of friction at screw thread is the ratio defining the force that resists the motion of the nut in relation to the threads in contact with it.ⓘ Coefficient of friction at screw thread [μ]			+10% -10%

✖Helix angle of screw is defined as the angle subtended between this unwound circumferential line and the pitch of the helix.ⓘ Helix Angle of Power Screw given Effort Required to Lift Load [α]

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Helix Angle of Power Screw given Effort Required to Lift Load

Formula

`"α" = atan(("P"_{"li"}-"W"*"μ")/("P"_{"li"}*"μ"+"W"))`

Example

`"4.773608°"=atan(("402N"-"1700N"*"0.15")/("402N"*"0.15"+"1700N"))`

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Helix Angle of Power Screw given Effort Required to Lift Load Solution

STEP 0: Pre-Calculation Summary

Formula Used

Helix angle of screw = atan((Effort in lifting load-Load on screw*Coefficient of friction at screw thread)/(Effort in lifting load*Coefficient of friction at screw thread+Load on screw))
α = atan((P_li-W*μ)/(P_li*μ+W))
This formula uses 2 Functions, 4 Variables

Functions Used

tan - The tangent of an angle is a trigonometric ratio of the length of the side opposite an angle to the length of the side adjacent to an angle in a right triangle., tan(Angle)
atan - Inverse tan is used to calculate the angle by applying the tangent ratio of the angle, which is the opposite side divided by the adjacent side of the right triangle., atan(Number)

Variables Used

Helix angle of screw - (Measured in Radian) - Helix angle of screw is defined as the angle subtended between this unwound circumferential line and the pitch of the helix.
Effort in lifting load - (Measured in Newton) - Effort in lifting load is the force required to overcome the resistance to lift the load.
Load on screw - (Measured in Newton) - Load on screw is defined as the weight (force) of the body that is acted upon the screw threads.
Coefficient of friction at screw thread - Coefficient of friction at screw thread is the ratio defining the force that resists the motion of the nut in relation to the threads in contact with it.

STEP 1: Convert Input(s) to Base Unit

Effort in lifting load: 402 Newton --> 402 Newton No Conversion Required
Load on screw: 1700 Newton --> 1700 Newton No Conversion Required
Coefficient of friction at screw thread: 0.15 --> No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

α = atan((P_li-W*μ)/(P_li*μ+W)) --> atan((402-1700*0.15)/(402*0.15+1700))

Evaluating ... ...

α = 0.0833151809055203

STEP 3: Convert Result to Output's Unit

0.0833151809055203 Radian -->4.77360823525615 Degree (Check conversion here)

FINAL ANSWER

4.77360823525615 ≈ 4.773608 Degree <-- Helix angle of screw

(Calculation completed in 00.004 seconds)

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Home » Engineering » Mechanical » Machine Design » Power Screws » Torque Requirement in Lifting Load using Square Threaded Screw » Helix Angle of Power Screw given Effort Required to Lift Load

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< 16 Torque Requirement in Lifting Load using Square Threaded Screw Calculators

Coefficient of Friction of Power Screw given Torque Required to Lift Load

Go Coefficient of friction at screw thread = ((2*Torque for lifting load/Mean Diameter of Power Screw)-Load on screw*tan(Helix angle of screw))/(Load on screw-(2*Torque for lifting load/Mean Diameter of Power Screw)*tan(Helix angle of screw))

Helix Angle of Power Screw given Torque Required to Lift Load

Go Helix angle of screw = atan((2*Torque for lifting load-Load on screw*Mean Diameter of Power Screw*Coefficient of friction at screw thread)/(2*Torque for lifting load*Coefficient of friction at screw thread+Load on screw*Mean Diameter of Power Screw))

Load on Power Screw given Torque Required to Lift Load

Go Load on screw = (2*Torque for lifting load/Mean Diameter of Power Screw)*((1-Coefficient of friction at screw thread*tan(Helix angle of screw))/(Coefficient of friction at screw thread+tan(Helix angle of screw)))

Torque Required to Lift Load given Load

Go Torque for lifting load = (Load on screw*Mean Diameter of Power Screw/2)*((Coefficient of friction at screw thread+tan(Helix angle of screw))/(1-Coefficient of friction at screw thread*tan(Helix angle of screw)))

Efficiency of Square Threaded Power Screw

Go Efficiency of power screw = tan(Helix angle of screw)/((Coefficient of friction at screw thread+tan(Helix angle of screw))/(1-Coefficient of friction at screw thread*tan(Helix angle of screw)))

Coefficient of Friction for Screw Thread given Efficiency of Square Threaded Screw

Go Coefficient of friction at screw thread = (tan(Helix angle of screw)*(1-Efficiency of power screw))/(tan(Helix angle of screw)*tan(Helix angle of screw)+Efficiency of power screw)

Coefficient of Friction of Power Screw given Effort Required to Lift Load

Go Coefficient of friction at screw thread = (Effort in lifting load-Load on screw*tan(Helix angle of screw))/(Load on screw+Effort in lifting load*tan(Helix angle of screw))

Helix Angle of Power Screw given Effort Required to Lift Load

Go Helix angle of screw = atan((Effort in lifting load-Load on screw*Coefficient of friction at screw thread)/(Effort in lifting load*Coefficient of friction at screw thread+Load on screw))

Load on Power Screw given Effort Required to Lift Load

Go Load on screw = Effort in lifting load/((Coefficient of friction at screw thread+tan(Helix angle of screw))/(1-Coefficient of friction at screw thread*tan(Helix angle of screw)))

Effort Required in Lifting load using Power Screw

Go Effort in lifting load = Load on screw*((Coefficient of friction at screw thread+tan(Helix angle of screw))/(1-Coefficient of friction at screw thread*tan(Helix angle of screw)))

Maximum Efficiency of Square Threaded Screw

Go Maximum Efficiency of Power Screw = (1-sin(atan(Coefficient of friction at screw thread)))/(1+sin(atan(Coefficient of friction at screw thread)))

External Torque required to raise Load given Efficiency

Go Torsional Moment on Screw = Axial load on screw*Lead of Power Screw/(2*pi*Efficiency of power screw)

Load on Screw given Overall Efficiency

Go Axial load on screw = 2*pi*Torsional Moment on Screw*Efficiency of power screw/Lead of Power Screw

Effort Required to Lift Load given Torque Required to Lift Load

Go Effort in lifting load = 2*Torque for lifting load/Mean Diameter of Power Screw

Mean Diameter of Power Screw given Torque Required to Lift Load

Go Mean Diameter of Power Screw = 2*Torque for lifting load/Effort in lifting load

Torque Required to Lift Load given Effort

Go Torque for lifting load = Effort in lifting load*Mean Diameter of Power Screw/2

Helix Angle of Power Screw given Effort Required to Lift Load Formula

Define coefficient of Friction?

The ratio of the tangential force that is needed to start or to maintain uniform relative motion between two contacting surfaces to the perpendicular force holding them in contact, the ratio usually being larger for starting than for moving friction

How to Calculate Helix Angle of Power Screw given Effort Required to Lift Load?

Helix Angle of Power Screw given Effort Required to Lift Load calculator uses Helix angle of screw = atan((Effort in lifting load-Load on screw*Coefficient of friction at screw thread)/(Effort in lifting load*Coefficient of friction at screw thread+Load on screw)) to calculate the Helix angle of screw, Helix Angle of Power Screw given Effort Required to Lift Load formula is defined as the angle between any helix and an axial line on its right, circular cylinder, or cone. Common applications are screws, helical gears, and worm gears. Helix angle of screw is denoted by α symbol.

How to calculate Helix Angle of Power Screw given Effort Required to Lift Load using this online calculator? To use this online calculator for Helix Angle of Power Screw given Effort Required to Lift Load, enter Effort in lifting load (P_li), Load on screw (W) & Coefficient of friction at screw thread (μ) and hit the calculate button. Here is how the Helix Angle of Power Screw given Effort Required to Lift Load calculation can be explained with given input values -> 273.5076 = atan((402-1700*0.15)/(402*0.15+1700)).

FAQ

What is Helix Angle of Power Screw given Effort Required to Lift Load?

Helix Angle of Power Screw given Effort Required to Lift Load formula is defined as the angle between any helix and an axial line on its right, circular cylinder, or cone. Common applications are screws, helical gears, and worm gears and is represented as α = atan((P_li-W*μ)/(P_li*μ+W)) or Helix angle of screw = atan((Effort in lifting load-Load on screw*Coefficient of friction at screw thread)/(Effort in lifting load*Coefficient of friction at screw thread+Load on screw)). Effort in lifting load is the force required to overcome the resistance to lift the load, Load on screw is defined as the weight (force) of the body that is acted upon the screw threads & Coefficient of friction at screw thread is the ratio defining the force that resists the motion of the nut in relation to the threads in contact with it.

How to calculate Helix Angle of Power Screw given Effort Required to Lift Load?

Helix Angle of Power Screw given Effort Required to Lift Load formula is defined as the angle between any helix and an axial line on its right, circular cylinder, or cone. Common applications are screws, helical gears, and worm gears is calculated using Helix angle of screw = atan((Effort in lifting load-Load on screw*Coefficient of friction at screw thread)/(Effort in lifting load*Coefficient of friction at screw thread+Load on screw)). To calculate Helix Angle of Power Screw given Effort Required to Lift Load, you need Effort in lifting load (P_li), Load on screw (W) & Coefficient of friction at screw thread (μ). With our tool, you need to enter the respective value for Effort in lifting load, Load on screw & Coefficient of friction at screw thread 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 Helix angle of screw?

In this formula, Helix angle of screw uses Effort in lifting load, Load on screw & Coefficient of friction at screw thread. We can use 1 other way(s) to calculate the same, which is/are as follows -

Helix angle of screw = atan((2*Torque for lifting load-Load on screw*Mean Diameter of Power Screw*Coefficient of friction at screw thread)/(2*Torque for lifting load*Coefficient of friction at screw thread+Load on screw*Mean Diameter of Power Screw))

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