• • • • ### how to calculate pulley force

Pulleys are one of the simple machines used to apply force on an object life any load and transmit power. It is a wheel on a shaft that supports the movement of a belt or cable along at its circumference. The mechanical advantage that is gained with the pulleys is calculated using the formula 2 number of movable pulleys. Sales Online

• ### Belt and Pulley Ratio CalculatorCalcuNATION

To find the total ratio use the pulley ratio formula Ratio = (Radius of Driven Pulley) / (Radius of Drive Pulley) Example A handcrank is attached to a drive pulley of 2 inches in radius. The belt runs from the drive pulley to a driven pulley. The driven pulley is 6 inches in radius and is

• ### Pulley CalculatorOmni

This pulley calculator analyzes a system of two pulleys joined by a conveyor belt (also called a belt drive). You can use it to calculate the pulley RPM (revolutions per minute) but also its diameter and some properties of the whole system (such as the pulley speed belt tension or torque).You can use this tool right away or continue reading to learn more about the logic behind the pulley

• ### Rotational motionAngular acceleration of a pulley

Pulley Newton s second law for rotation applied to the pulley is . The torque (or moment) of a force is given by Where r is a vector that goes from the point we choose as the origin of the moments to the point of application of the force.. The direction of the cross product is determined using the right-hand rule and the magnitude is . Where θ is the angle that form both vectors.

• ### Correctly Sizing a Pump Pulley SheaveAll Applications

Jun 26 2018 · The Math of Pulley Sizing. There are complicated formulas for determining pulley ratios but in generic layman terms simply divide the driven component (pump) by RPM the driver component (motor or engine) rated by RPM to

• ### Calculating Output Speed Using Pulley Diameters and Input

May 28 2020 · Your current ratio is 3.5/9 = .388 so any combination of pulleys that provides that ratio will maintain the speed. If you use an 8″ pulley on the fan than a 3″ pulley on the motor will be close. 3/8 = .375 ratio. If the motor is 1800 rpm your current fan speed is 1800(.388) = 698 rpm. A 3″ to 8″ pulley would give you 1800(.375) = 675

• ### SECTION 24 TIMING BELT DRIVE SELECTION PROCEDURE Step

The number of grooves of the small pulley as well as the rpm of the faster shaft on which this pulley is located are known. Tables 43 through 52 show the torque and/or horsepower or kilowatt ratings for the base width of particular belt pitches. For the HTD and GT2 drives the torque ratings shown in these tables must be multiplied by

• ### TorqueWork done and Power transmitted

T = torque or moment (Nm) Power transmitted. Power is the ratio between the work done and the time taken and can be expressed as. P = W / dt = T θ / dt = T ω = 2 π n T = 2 π (n rpm / 60) T = 0.105 n rpm T (3) where . P = power (Watts) dt = time taken (s) ω = θ / dt = 2 π n = angular velocity (rad/s)

• ### How to Calculate the Speed of Two Different Pulleys

Calculate the pulley ratio by dividing the pulley s pitch diameter by the pitch diameter of the drive pulley. For example suppose the drive-shaft has a diameter of 2.2 inches and two pulleys driven by the belt have diameters of 4.4 inches and 2.8 inches. The first ratio

• ### Engineering Info

To Find Given Formula 7 lting Effective Tension T 1 and T 2 Te = T 1T 2 Effective Tension HP RPM Pulley Radius Te = 63025 x HP RPM x R Effective Tension Torque Pulley Radius Te = Torque / R Effective Tension Horsepower Belt Velocity (FPM) Te = (HP x 33000) / FPM Total Load T 1 T 2 TL = T 1 T 2 8. Overhung Load

• ### Power transmission of a belt drivetec-science

The circumferential force is generated at the input pulley by the torque acting there and the effective diameter of the pulley. At the output pulley the circumferential force causes a change in torque in accordance with the effective diameter of the output pulley. but these variables are generally known in advance. The following formula

• ### conveyor torque calculationGear Pulley engineering

Jan 09 2009 · From this I calculate the torque to be 6.2 kN and using an efficiency factor of 0.85 the power needed would be 3.0 kW. The driving force is provided by forcing the smooth surface of a grooved transmission belt driven by the motor against the surface of the chain block over a distance of 1.2mtr.

• ### Torque Calculations with Pulleys

1. Draw free body diagrams for the masses and the pulley. 2. Write an equation for Net force for each mass s acceleration. 3. Write an equation for Net Torque for the pulley. 4. In the torque equation eliminate α and sub a/r. 5. Combine the equations to eliminate T(tension) and be

• ### Torque Calculator

This torque calculator can calculate the torque (T) value distance (D) or force (F) by using the same formula (T = F D) and can support various measurement units. You can read more about the equations used and the unit conversions below the tool.

• ### Force and torque of a string on a pulley

force exerted by the axle produce no torque about the rotation axis. Therefore the net torque on the pulley is τ = T2R − T1R. Applying the so-called Newton s second law for rotational motion τ = Iα to the pulley one has (T2 − T1)R = Iα. (1.2) Since the string does not slide on the pulley there holds the constraint a = αR. With the

• ### Torque and rotational inertia

Torque and rotational inertia. 10-27-99 Sections 8.48.6 Torque. We ve looked at the rotational equivalents of displacement velocity and acceleration now we ll extend the parallel between straight-line motion and rotational motion by investigating the rotational equivalent of force which is torque.

• ### How to calculate motor drive torque for belt and pulley

Jun 07 2019 · J p2 = inertia of idler pulley (provide by manufacturer or calculate) (kgm 2) J l = inertia of load (kgm 2) Although we assumed above that the drive and idler pulleys have the same radius their inertias may be slightly different since the drive pulley is toothed and therefore has a slightly larger radius and higher mass than the idler pulley.

• ### Calculating Power/Torque transmitted between 2 pulleys

Jan 17 2017 · Homework Statement Q1. A pulley 150 mm diameter is driven directly by an electric motor at 250 revs min–1. A V-belt is used to transmit power from this pulley to a second pulley 400 mm diameter against a load of 200 Nm. The distance between the centre of the pulleys is 600 mm the

• ### Pulley Belt CalculationsThe Engineering Mindset

May 26 2019 · Remember Pulley 1 is always going to be the largest pulley you have and you ll see this as we go through the calculations shortly. We also have Pulley 2 and we know the diameter of this pulley as well. Again this is taken from manufacturer s data or measured. We also know the centre distance between these two pulleys.

• ### Pulley Torque calculations Physics Forums

Apr 29 2013 · pulley torque lets simplify this hp 5252/rpm=torque ftlbs motor hp 2 motor rpm 1725 2 5252/1725=6.08 ftlbs torque add a driving pulley 3 inch and a driven pulley 5 inch to this and through reduction we will increase torque. 1725 3/5=1035 rpm 2hp 5252/1035rpm=10.14 or 10 ftlbs torque less ineff. of pulleys motor etc.

• ### High Torque Timing Pulleys

High Torque Timing PulleysS8M Type A Shape B Shape For Non-Backlash Timing Pulleys refer to P.1372 Super High Torque Timing Belts refer to P.1440 High Torque Timing Belts refer to P.1436 Keyless High Torque Timing Pulleys refer to P.1402 Idlers with Teeth refer to P.1422. Shaft Bore Specs. The shaft bore may not have surface

• ### What is Torque Definition Equation Calculation

Torque is the twisting force that tends to cause rotation. The point where the object rotates is known as the axis of rotation . Mathematically torque can be written as T = F r sin( theta

• ### Pulley and RPM Calculator Engineering Information

Below is the basic formula an example and a Pulley Speed Calculator for your use. Please remember that there are more factors in a good drive setup than just if the pulleys fit. Ratio RPM 1 D 1 RPM 2 D 2 RPM 1 = RPM of DriverRPM 2 = RPM of Driven D 1 = Diameter or tooth count of DriverD 2 = Diameter or tooth count of Driven.

• ### Formula for a Pulley Sciencing

Apr 24 2017 · Such a pulley is called a differential pulley. It is a common fixture in car repair shops. It has the interesting property that the line that the puller pulls can hang loose while a load is held aloft because there is always enough friction that the opposing forces on the two pulleys

• ### Pulley and RPM Calculator Engineering Information

Below is the basic formula an example and a Pulley Speed Calculator for your use. Please remember that there are more factors in a good drive setup than just if the pulleys fit. Ratio RPM 1 D 1 RPM 2 D 2 RPM 1 = RPM of DriverRPM 2 = RPM of Driven D 1 = Diameter or tooth count of DriverD 2 = Diameter or tooth count of Driven.

• ### Rotational motionAngular acceleration of a pulley

Pulley Newton s second law for rotation applied to the pulley is . The torque (or moment) of a force is given by Where r is a vector that goes from the point we choose as the origin of the moments to the point of application of the force.. The direction of the cross product is determined using the right-hand rule and the magnitude is . Where θ is the angle that form both vectors.

• ### Pulley Belt CalculationsThe Engineering Mindset

May 26 2019 · Remember Pulley 1 is always going to be the largest pulley you have and you ll see this as we go through the calculations shortly. We also have Pulley 2 and we know the diameter of this pulley as well. Again this is taken from manufacturer s data or measured. We also know the centre distance between these two pulleys.

• ### (PDF) Force and torque of a string on a pulley

Jun 19 2017 · If TL and TR are the tensions pulling at the left and right edges of the pulley (see Fig. 1) respectively the net torque on the pulley is then taunet = (TLTR)R where R is the radius of the