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## How is idler pulley measured?

To be more precise, you can wrap a string tightly around the flat of the pulley where your belt rides. Mark the string where they overlap, then measure its length. Divide that number by 3.14. In this flat idler, the string measured 10 1/4”.

Does idler pulley size matter?

Size: When you’re choosing a new idler pulley, keep the dimensions that you will need in mind. If the pulley is too wide, it can cause undue stress; while a small pulley will not power everything that needs to be powered.

### Where are Dayco pulleys made?

The pulley is in a Dayco box, which is labled Made in Germany.

How do you count grooves on a pulley?

Ribbed belts have lengthwise grooves on the inside. Measure the pitch of the groove, i.e. distance between projections, e.g. 3.54 mm = belt type PK. Count the number of grooves, i.e. the number of projections – e.g. 7, as shown in the picture. Width measurement is not usually accurate and is used only to check.

## What size pulley do I need?

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.

Does pulley size make difference?

A larger diameter pulley wheel (aka sheave) is technically more efficient than a smaller diameter pulley. But it’s a trade off: a larger pulley has increased bulk, weight and cost. This efficiency increases with really big loads (600 lbs+) and larger mechanical advantage, such as 6:1 and 9:1.

### Are idler pulleys necessary?

Idler pulleys seem to be a fairly unimportant part of your car. However, they play a critical role in maintaining optimum performance for your air conditioning, power steering, alternator, and water pump. They are an inexpensive part and don’t take too long to change out.

What does the idler pulley do?

The idler pulley is a common part that’s found on the majority of the vehicles on the road. Its primary function is to provide tension and guide the engine drive belt. These belts wrap around the various parts of the engine such as the power steering pump, alternator, water pump etc…

## How deep should V-belt sit in a pulley?

Figure 58.4 is an illustration of how a V-belt should sit in the pulley groove. The top of the belt should be within -inch of the outer surface of the pulley. If the belt top is deeper in the groove, the groove or belt is worn, which can shorten the remaining belt life by as much as 50 per cent.

What is pulley pitch diameter?

pitch diameter: Diameter of the pulley at the pitch line level of the belt used with this pulley. pitch circumference: Circumference of a circle with a diameter equal to the pitch diameter. effective diameter: Reference diameter of the pulley at the tip of the grooves, with the minimum specified transitional radius.

### What kind of pulleys does Dayco use?

As a complement to its accessory drive belts and tensioners, Dayco provides a wide range of pulleys and idlers in stamped and formed steel, plastic and powdered metal, with various bearing configurations to suit even the highest belt loading. The idler pulleys are available to be sub-assembled to engineered brackets.

Which is the best idler and tensioner pulley?

Dayco® No Slack™ Idler/Tensioner Pulleys are designed to replace worn Serpentine and V-Belt drive Idler and Tensioner Pulleys. Dayco’s reputation for top performance Idler and Tensioner Pulleys is the result of the advanced automotive technologies employed in the materials research, design engineering and manufacture of our Pulleys.

## What kind of CAD is used to make idler pulleys?

The idler pulleys are available to be sub-assembled to engineered brackets. The use of state-of-the-art three dimensional computer aided design (CAD) and finite element analysis guarantees the optimal design and maximum structural integrity for both plastic and steel pulleys.

Which is the best way to design a pulley?

The use of state-of-the-art three dimensional computer aided design (CAD) and finite element analysis guarantees the optimal design and maximum structural integrity for both plastic and steel pulleys. Pulleys with smoother surfaces and tighter dimensional tolerances translate into less vibration and, therefore, longer belt life.