Why does my V-belt have notches?

A notched belt has grooves or notches that run perpendicular to the belt's length, which reduces the bending resistance of the belt. Notched belts can use the same pulleys as cross-section standard V-belts. They run cooler, last longer, and are about 2% more efficient than standard V-belts.

Why are some V-belts notched?

Notched or Cogged V-Belts

Notches reduce bending stress, allowing the belt to wrap more easily around small diameter pulleys and allowing better heat dissipation. Excessive heat is a major contributor to premature belt failure.

Why are V-belts ribbed?

The ribs ensure even load distribution across the entire belt width, giving ribbed V-belts efficiencies in the range of 98 percent — similar to that of flat belts. The ribs also ensure the belt tracks properly, so alignment is less critical than for traditional V-belts and operation tends to be quieter.

Why are some V-belts cogged?

Cogged belts have slots that run perpendicular to the belt's length. The slots reduce the belt's bending resistance. Cogged belts can be used with the same pulleys as equivalently rated V- belts. They run cooler, last longer, and have an efficiency that is about 2% higher than that of standard V-belts.

What is groove angle in V belt?

angle usually varies from 30 to 40 degree.

V Belts Basic Characteristics and Selection

What is the effect of a worn groove on the performance of V-belt?

One sign of worn grooves is that it will cause one or more belts to ride lower than the others. This is known as differential driving, resulting in premature wearing of belts and reduced performance levels (Fig. 1).

What is the effect of V groove on the pulley?

The V shape causes the belt to wedge tightly into the pulley, increasing friction and allowing higher operating torque. A V-belt or rope meshing in a V-shaped groove of the pulley increases greatly the frictional resistance to slipping, for a given maximum belt tension, as compared to flat belt.

Can I use a cogged V-belt?

Most standard equipment that runs with V belts can switch to using cog belts. They can run with the same pulleys as V belts with the same ratings. Check with your owner's manual before switching over, but in general, you can use cog belts on any system that runs with V belts.

Why do some belts have teeth?

Gilmer belts use trapezoidal teeth to engage matching grooves on toothed pulleys in order to maintain synchronicity between moving parts.

What are the different types of V belts?

There are three common V belt types: Classical V-belt (classified by their dimensions from A to E), Narrow V series (classified by their dimensions 3V, 5V, and 8V), and light duty Fractional Horsepower belt (classified by their dimensions 2L, 3L, 4L, 5L). Their counterpart cogged belt is classified by the letter X.

What is the difference between V-belt and V-ribbed belt?

The V-ribbed belt is flatter and wider than the V-belt. Its longitudinal ribs enable it to transmit higher forces. Smaller angles of contact are also possible with the V-ribbed belt. Since the late 1980s/early 1990s, V-ribbed belts have almost completely replaced V-belts in the field of passenger cars.

Are ribbed belts better?

Multi-ribbed V-belts are much thinner than their chunkier V-belt brethren. Not only does the thinner design help save material, but the belt itself also generates less heat while offering better flexibility. The multiple ribs also offer a better grip, reducing power-robbing slippage.

What is multi ribbed belt?

Multi Ribbed Belts combine the high flexibility of flat Belts with a high power transmission capacity of V-Belts. Multi Ribbed Belts enable economic solutions even under difficult drive conditions, such as large transmission ratios, high Belt speeds, small pulley diameters and back idler pulleys.

When would you use a ribbed belt?

The small minimum pulley diameters are suitable for drives with high speed ratios as well as slow running drives. Ribbed belts are well suited for the use of back bend idlers, such as in serpentine drives.

What is a raw edge V belt?

Raw-edge (or cogged) v-belts

Raw-edge belts have cogs on the bottom section and forego the fabric wrapping on the outside of the belt, leaving the interior materials exposed on the sides. The belt, provided with a higher coefficient of friction, can now better grip the sheaves.

Are V-belts directional?

From a purely technical point of view, a new timing belt is completely symmetrical, meaning it does not have a direction of rotation. “Then what's the use of timing belts with directional arrows?”, we hear you wonder. If your new timing belt has timing marks, then there are similar marks on the pulleys/on the engine.

Why do CVT belts have teeth?

Carlisle Super AG Drive Double-Sided CVT Belts feature two sides of high-quality cogged teeth for superb power transmission and stability on aggressive variable speed drives.

What does HTD belt mean?

HTD stands for High Torque Drive and refers to a drive system utilizing belting that has a curvilinear tooth, improving on torque capacity over traditional timing and V belt drives. A HTD drives utilizes belts and belt “sprockets”, providing timing and synchronization accuracy.

What is the difference between a wrapped V belt and a notched V belt?

A notched belt has grooves or notches that run perpendicular to the belt's length, which reduces the bending resistance of the belt. Notched belts can use the same pulleys as cross-section standard V-belts. They run cooler, last longer, and are about 2% more efficient than standard V-belts.

What is a kiss idler?

Contact idlers aka Kiss idlers. Spring loaded movable motor or idler to maintain belt tension. Automatic take up. What is used to transmit power from a horizontal shaft to a vertical shaft. Quarter turn drives.

Where are cogged belts used?

A cog belt is a high-performance belt used in applications where slippage or failure must be avoided.

What is the groove found in a pulley for?

In this context, pulleys are normally known as blocks. A pulley may have a groove or grooves between flanges around its circumference to locate the cable or belt. The drive element of a pulley system can be a rope, cable, belt, or chain.

What will the pulley grooves cause if it is not smooth?

Misalignment of Pulleys

Pulleys need to be aligned properly in order to prevent premature wear on belts and pulleys, increased vibration and drive instability.

Where should a V belt ride in the pulley?

V-belts should ride at least flush with the top of the pulley and may ride out up to 0.2”. Check for burrs, nicks, gouges and severe scratches as these will drastically reduce belt life.