Kethavath Srinath
Osmania University (OU), Hyderabad
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Urvi Rathod
Vishwakarma Government Engineering College (VGEC), Ahmedabad
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11 Other formulas that you can solve using the same Inputs

Effort applied parallel to inclined plane to move the body in downward direction considering friction
Effort required to move a body on inclined surface considering friction=Weight of body on which frictional force is applied*(sin(Angle of inclination of the plane to the horizontal)-(Coefficient of Friction*cos(Angle of inclination of the plane to the horizontal))) GO
Effort applied parallel to inclined plane to move the body in upward direction considering friction
Effort required to move a body on inclined surface considering friction=Weight of body on which frictional force is applied*(sin(Angle of inclination of the plane to the horizontal)+(Coefficient of Friction*cos(Angle of inclination of the plane to the horizontal))) GO
Total torque required to overcome friction in rotating a screw
Torque=(Weight of Load*tan(Helix Angle+Limiting angle of friction)*Mean diameter of Screw/2)+(Coefficient of friction for collar*Weight of Load*Mean radius of collar) GO
Force required to lower the load by a screw jack when weight of load, helix angle and coefficient of friction is known
Force=Weight of Load*((Coefficient of Friction*cos(Helix Angle))-sin(Helix Angle))/(cos(Helix Angle)+(Coefficient of Friction*sin(Helix Angle))) GO
Force at circumference of the screw when weight of load, helix angle and coefficient of friction is known
Force=Weight*((sin(Helix Angle)+(Coefficient of Friction*cos(Helix Angle)))/(cos(Helix Angle)-(Coefficient of Friction*sin(Helix Angle)))) GO
Torque required to overcome friction between screw and nut(lowering load)
Torque=Weight of Load*tan(Limiting angle of friction-Helix Angle)*Mean diameter of Screw/2 GO
Torque required to overcome friction between screw and nut(lowering load)
Torque=Weight of Load*tan(Limiting angle of friction-Helix Angle)*Mean diameter of Screw/2 GO
Torque required to overcome friction between screw and nut
Torque=Weight of Load*tan(Helix Angle+Limiting angle of friction)*Mean diameter of Screw/2 GO
Roll Separating Force
Roll Separating Force =Length*Width*(1+Coefficient of Friction*Length/2*Height) GO
Force required to lower the load by a screw jack when weight of load, helix angle and limiting angle is known
Force=Weight of Load*tan(Limiting angle of friction-Helix Angle) GO
Force at circumference of the screw when weight of load, helix angle and limiting angle is known
Force=Weight of Load*tan(Helix Angle+Limiting angle of friction) GO

11 Other formulas that calculate the same Output

Efficiency of spiral gears
Efficiency =(cos(Spiral angles of gear teeth for gear 1+Angle of friction)*Pitch circle diameter of gear 2*Speed of gear 2)/(cos(Spiral angles of gear teeth for gear 1-Angle of friction)*Pitch circle diameter of gear 1*Speed of gear 1) GO
Efficiency of spiral gears
Efficiency =(cos(Spiral angles of gear teeth for gear 1+Angle of friction)*cos(Spiral angles of gear teeth for gear 1))/(cos(Spiral angles of gear teeth for gear 1-Angle of friction)*cos(Spiral angles of gear teeth for gear 1)) GO
Efficiency of screw jack when screw friction as well as collar friction considered
Efficiency =(Weight*tan(Helix Angle)*Mean diameter of Screw)/((Weight of Load*tan(Helix Angle+Limiting angle of friction)*Mean diameter of Screw)+(Coefficient of friction for collar*Weight of Load*Mean radius of collar)) GO
Efficiency of Square Threaded Screw
Efficiency =tan(Helix Angle)/((Coefficient of Friction+tan(Helix Angle))/(1-Coefficient of Friction*tan(Helix Angle))) GO
Maximum efficiency of spiral gears
Efficiency =(cos(Shaft angle+Angle of friction)+1)/(cos(Shaft angle-Angle of friction)+1) GO
Maximum efficiency of screw a jack
Efficiency =(1-sin(Limiting angle of friction))/(1+sin(Limiting angle of friction)) GO
Efficiency of screw jack when only screw friction considered
Efficiency =tan(Helix Angle)/tan(Helix Angle+Limiting angle of friction) GO
Efficiency of transmission
Efficiency =(Total Head at Entrance-Head loss)/Total Head at Entrance GO
Mechanical Efficiency
Efficiency =Induced voltage*Armature Current/Angular Speed*Torque GO
Rotor Efficiency
Efficiency =Motor Speed/Synchronous Speed GO
Motor Efficiency Using Slip
Efficiency =1-Slip GO

Efficiency of Acme Threaded Screw Formula

Efficiency =tan(Helix Angle*pi/180)*(1-Coefficient of Friction*tan(Helix Angle*pi/180)*sec(14.5*pi/180))/(Coefficient of Friction*sec(14.5*pi/180)+tan(Helix Angle*pi/180))
n=tan(α*pi/180)*(1-μ*tan(α*pi/180)*sec(14.5*pi/180))/(μ*sec(14.5*pi/180)+tan(α*pi/180))
More formulas
Helix Angle When Torque Required in Lifting a Load With Acme Screw Thread is Given GO
Coefficient of Friction When Torque Required in Lifting a Load with Acme Tread is Given GO
Load When Torque Required in Lifting a Load with Acme Screw Thread is Given GO
Torque Required in Lifting a Load With Acme Screw Thread GO
Coefficient of Friction When Effort is Given GO
Helix Angle When Effort Required in Lifting a Load with Acme Screw Thread is Given GO
Load When Effort Required in Lifting a Load with Acme Screw Thread is Given GO
Effort Required in Lifting a Load with Acme Thread GO
Helix Angle When Torque Required in Lowering a Load is Given GO
Coefficient of Friction When Torque Required in Lowering a Load is Given GO
Mean Diameter of Screw When Torque Required in Lowering a Load is Given GO
Load When Torque Required in Lowering a Load is Given GO
Helix Angle When Effort Required in Lowering a Load is Given GO
Coefficient of Friction When Effort in Lowering a Load is Given GO
Load When Effort Required in Lowering a Load is Given GO
Effort Required in Lowering a Load GO
Torque Required in Lowering a Load GO
Coefficient of Friction When Efficiency of a Trapezoidal Threaded Screw is Given GO

What are the main factors that determine Screw Efficiency?

Two main factors play a part in determining a screw’s efficiency: the lead angle of the screw and the amount of friction in the screw assembly. Efficiency is the primary indicator of whether a screw will back drive or not the higher the efficiency, the more likely the screw is to back drive when an axial force is applied.

How to Calculate Efficiency of Acme Threaded Screw?

Efficiency of Acme Threaded Screw calculator uses Efficiency =tan(Helix Angle*pi/180)*(1-Coefficient of Friction*tan(Helix Angle*pi/180)*sec(14.5*pi/180))/(Coefficient of Friction*sec(14.5*pi/180)+tan(Helix Angle*pi/180)) to calculate the Efficiency , The Efficiency of Acme Threaded Screw formula is defined as the higher the efficiency, the more likely the screw is to back drive when an axial force is applied. Efficiency and is denoted by n symbol.

How to calculate Efficiency of Acme Threaded Screw using this online calculator? To use this online calculator for Efficiency of Acme Threaded Screw, enter Helix Angle (α) and Coefficient of Friction (μ) and hit the calculate button. Here is how the Efficiency of Acme Threaded Screw calculation can be explained with given input values -> 0.042284 = tan(0.5235987755982*pi/180)*(1-0.2*tan(0.5235987755982*pi/180)*sec(14.5*pi/180))/(0.2*sec(14.5*pi/180)+tan(0.5235987755982*pi/180)).

FAQ

What is Efficiency of Acme Threaded Screw?
The Efficiency of Acme Threaded Screw formula is defined as the higher the efficiency, the more likely the screw is to back drive when an axial force is applied and is represented as n=tan(α*pi/180)*(1-μ*tan(α*pi/180)*sec(14.5*pi/180))/(μ*sec(14.5*pi/180)+tan(α*pi/180)) or Efficiency =tan(Helix Angle*pi/180)*(1-Coefficient of Friction*tan(Helix Angle*pi/180)*sec(14.5*pi/180))/(Coefficient of Friction*sec(14.5*pi/180)+tan(Helix Angle*pi/180)). Helix Angle denotes the standard pitch circle unless otherwise specified. Application of the helix angle typically employs a magnitude ranging from 15° to 30° for helical gears, with 45° capping the safe operation limit and The Coefficient of Friction (μ) is the ratio defining the force that resists the motion of one body in relation to another body in contact with it. This ratio is dependent on material properties and most materials have a value between 0 and 1. .
How to calculate Efficiency of Acme Threaded Screw?
The Efficiency of Acme Threaded Screw formula is defined as the higher the efficiency, the more likely the screw is to back drive when an axial force is applied is calculated using Efficiency =tan(Helix Angle*pi/180)*(1-Coefficient of Friction*tan(Helix Angle*pi/180)*sec(14.5*pi/180))/(Coefficient of Friction*sec(14.5*pi/180)+tan(Helix Angle*pi/180)). To calculate Efficiency of Acme Threaded Screw, you need Helix Angle (α) and Coefficient of Friction (μ). With our tool, you need to enter the respective value for Helix Angle and Coefficient of Friction 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 Efficiency ?
In this formula, Efficiency uses Helix Angle and Coefficient of Friction. We can use 11 other way(s) to calculate the same, which is/are as follows -
  • Efficiency =Motor Speed/Synchronous Speed
  • Efficiency =1-Slip
  • Efficiency =Induced voltage*Armature Current/Angular Speed*Torque
  • Efficiency =tan(Helix Angle)/tan(Helix Angle+Limiting angle of friction)
  • Efficiency =(Weight*tan(Helix Angle)*Mean diameter of Screw)/((Weight of Load*tan(Helix Angle+Limiting angle of friction)*Mean diameter of Screw)+(Coefficient of friction for collar*Weight of Load*Mean radius of collar))
  • Efficiency =(1-sin(Limiting angle of friction))/(1+sin(Limiting angle of friction))
  • Efficiency =(cos(Shaft angle+Angle of friction)+1)/(cos(Shaft angle-Angle of friction)+1)
  • Efficiency =(cos(Spiral angles of gear teeth for gear 1+Angle of friction)*cos(Spiral angles of gear teeth for gear 1))/(cos(Spiral angles of gear teeth for gear 1-Angle of friction)*cos(Spiral angles of gear teeth for gear 1))
  • Efficiency =(cos(Spiral angles of gear teeth for gear 1+Angle of friction)*Pitch circle diameter of gear 2*Speed of gear 2)/(cos(Spiral angles of gear teeth for gear 1-Angle of friction)*Pitch circle diameter of gear 1*Speed of gear 1)
  • Efficiency =(Total Head at Entrance-Head loss)/Total Head at Entrance
  • Efficiency =tan(Helix Angle)/((Coefficient of Friction+tan(Helix Angle))/(1-Coefficient of Friction*tan(Helix Angle)))
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