# Quick Answer: Which Pulley Will Turn Faster?

## How do you calculate Pulley Torque?

For a belt drive system, the motor torque required during constant velocity is simply the total axial force (Fa) on the belt multiplied by the radius (r1) of the drive pulley..

## How do I know what size pulley I need for my electric motor?

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 get the required ratio. In the example below, the pump RPM is 1070, for full output, while the motor is 1750 RPM.

## How much weight can you lift with a pulley?

The 100kg mass (1000 newton weight) is now effectively supported by two sections of the same rope (the two strands on the left) instead of just one (ignoring the loose end of the rope you’re pulling with), and this means you can lift it by pulling with a force of just 500 newtons—half as much!

## How do you adjust a fan pulley?

How to adjust the pulley?First remove the fan “V” belt (see How to Replace a Belt).Then loosen the allen screw at the hub of the pulley and remove the key.Rotate the top of the pulley clockwise to close the belt groove ½ turn, 1 turn, 1-1/2 turn or 2 turns as required to obtain the desired adjustment.More items…

## Does size of pulley matter?

As long as you use a good quality pulley, the diameter doesn’t matter much in climbing applications.

## Does a smaller pulley spin faster?

Pulleys of Different or Same Size If a smaller pulley turns a larger one, the larger one will turn slower, but with more power available at the shaft. If a bigger pulley turns a smaller one, the smaller one will turn much faster than the bigger one but with less power available at the shaft.

## How does pulley size affect torque?

The ratio of the pitch diameters is called the drive ratio, the ratio by which torque is increased and speed is decreased, or vice versa. … Pulleys do not effect power; when they increase torque, it is at the expense of speed, and vice versa.

## What is pulley ratio?

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.

## How do I lower the RPM on my electric motor?

A couple of things you can do:Use gears to change ratio of speed, which is what you’re going to do. … Use a stepper motor, which are commonly used for high-torque, low RPM applications.Find some sort of PWM control circuit to slow it down, although you probably won’t be able to get it down to 5-10RPM.

## Does belt length affect speed?

Re: Belt size and speed. How does it work? the belt itself doesnt affect the speed, if it is the right thickness for the pulleys. The actual speed of the belt is measured at its center, not its inside or outside edges.

## Does a bigger pulley increase speed?

Increasing Speed: When the powered pulley is larger than the non-powered pulley then the speed of the non-powered pulley is higher in proportion to the circumferences of the pulleys. … The non-powered pulley will move slower but it will be able to generate twice as much torque.

## How does pulley size affect speed?

By changing the diameter of the pulley wheels, speed can be changed. A smaller pulley turning a larger pulley results in the larger one moving more slowly but with more shaft power.

## How do you calculate pulleys?

To calculate the mechanical advantage of a pulley you simply have to count the number of rope sections that support whatever object you are lifting (not counting the rope that is attached to the effort). For example, in a one pulley system the MA is 1. In a two pulley system the MA is 2.

## How much can a block and tackle lift?

Even though a block and tackle decreases the amount of force necessary to move an object, it does not change the amount of work. For example, a block and tackle with a mechanical advantage of four will allow you to lift a 4 lb. object with only 1 lb.

## How do you calculate pulley speed ratio?

The speed ratio is defined as the ratio of the large to small pulley size and can be calculated simply by dividing the number of teeth in the large pulley by the number of teeth in the small pulley.

## How can I speed up my pulley?

To increase blower speed, slightly loosen the setscrew that holds the pulley to the driveshaft. Move or turn the pulley clockwise on the shaft one turn, then tighten setscrew. If more speed is desired, turn the pulley clockwise two turns.

## Can a pulley increase power?

Pulleys are powerful simple machines. They can change the direction of a force, which can make it much easier for us to move something. … Pulleys can also provide us with a mechanical advantage when we use several together and more rope. This process lessens the amount of force required to lift something.

## Are oversized pulley wheels worth it?

But oversize pulley wheels actually offer enough of an advantage in wattage savings that it may be worth sacrificing style. … So by opening up those angles and making them less sharp, the chain can articulate less than it would when it passes around smaller pulley wheels. Voila! Less friction.