Life Time of V-Belt

What did the seller of the equipment say when you asked him how to do this???

He might be more familiar with the operating environment than we are.

Rhetorical question, to be sure.

You should ask to the vendor of v-belt. To extend its life, you should set the belt tension according to the recommended tension, otherwise the slippage / overstress of the belt will shorten its life (and also bearings of your blower/motor).

when i was working here, thats blower have installed, and i did'nt know about vendor recomended.

that blower is very criticals, and belt as transmision always broken after 3 or 4 month, i want try to extend life time, with don't distrubs process production that blower resulted know.

It sounds like the lifetime of the belt is 3-4 months, then.

Have you actually picked up the telephone and talked to someone at the blower manufacturers or did you think it would be better to ask a bunch of random people instead to see if they new better?

No, no, no. We are supposed to come up with a complete, preposterously precise, arcane equation that generates a Gaussian distributed value between 100 and 50,000 hours of operation to exonerate the use of this product. Knowing the belt tension, variability of the load or composition of the belt material is obviously superfluous information to the cause. The alignment and surface condition of the pulleys do not matter. Obviously there is no belt tensioner so tension is red herring here.

From the picture, that drive is way too flimsy. No wonder its lifetime is low.

If you have followed all the installation procedures correctly, it lasts as long as it lasts. Belts are cheap compared to lost production, so have an extra one on hand at all times. Also MAKE SURE you are following correct installation procedures!

Trying to predict the lifetime of the belt is a fools errand.

5 rows of belts for 10kw is is unbelivable, and last only 3 or 4 months ????????

SPB belts are one of the good quality belts specifications. SPB section belts are suitable as good as normal C section belts.

From a good manufacturer's specifications, for 8 inch pitch dia of small pully running at 1750 RPM, one B section belt has capacity of 13.39 kw.

There seems some major mistake.

Mr.Mukesh0861:::::therefore , I want find how came like that

dedek,

You give all the relevent data, like motor rpm, blower required rpm, motor power and centre line distance between two shafts. Also see what is power requirement of your blower.

I hope there's a guard around that belt. I wouldn't like to get my uniform caught in it....

Does the motor run all the time?

Some possible info here:

http://www.pennbarry.com/engdocs/pdf/ED16002.pdf

If you don't have one installed, have you considered purchasing a soft starter? It would extend the life of both the motor and the belts substantially.

Why bother? Whether the belt breaks now or when you think it will, you will have to go through the same procedure of changing the belt.

I agree.

just keep some spare belts around and change it when neededd.

If these are banded together I would go with a set of matched separate belts and double the pulley sizes...with a soft starter if you don't already have one...

All, thank U for all your suggest,

it is important to me, and i will try the correct steps for install my belting with same belt specification before, and i see what happen for the next.

GA for this answer. I would just like to stress always change the belts as a complete set for max lifespan

It seems that the belt contact area over the pulley is not sufficient to transmit the torque. You can try increasing the diameter of both the pulleys maintaining the same ratio as now to keep the blower RPM same. This will reduce belt slip over the pulley and life will be enhanced.

Looking at your picture I would believe that you need a multi pulley and use three or four belts.

There had been a lot of good information provided by the commentors. just do the process of ellimination what really causes the belt damage. Start with the basic like alignment, belt tension, pulley condition, load (check bearing), length of belt, foundation (especially the drive and blower are having different foundation.), try putting a base jackbolt to hold the drive and blower from moving in due the belt tension. Keep the pulley and belt clean. Before increasing the number of belts or changing belt type, using laser alignment, etc.

You may find a belt life calculator but it is not guarranted hence it only assume on an ideal working condition.

ps. it looks like you need to increase belt angle of wrap. Increase the pulleys diameter or install a belt tensioner. Also reduce the center distance (reduce belt lenght). base on the picture shown.

Use the Gates calculator, which is available on line.

Dear Mr. dedek,

!. Select Right Type of Belt B or C or D size, and ensure CORRECT GROOVES.

2. No. of Belts Required, should not be COMPRAMISED.

3. Use of Idlers to increase Belt/Pulley CONTACT AREA to avoid SLIPPAGE.

4. Correct Tension. Lesss Tension will result in Slippage.

5. If possible use one No. extra belt or next higher size, or both.

DHAYANANDHAN.S