About Lubrication

Since we can not see your machines from here, I would suggest reading the manual that came with the machine(s). That should tell you the correct lubricant, and schedule to follow.

Dear Sir,

Thanks, Lets consider one of my machine. Its an exhuast blower driven with 55KW motor belt driven and blower having 2 bearings DE & NDE i.e 22215 EK with SN 515 housings. We have cleaned the blower impeller and relubricated even after lubrication the bearing alone giving warning indication.

You don't listen very well.

Have you asked for help from anyone who knows what your equipment is?

Do you have any idea what you are doing?

Don't you have anyone in your plant who knows ANYTHING about your equipment?

I think the answer to the above questions will all be NO!

<unsubscribes, _{shaking head in disbelief})

Belt driven. How is the proper belt tension done? Possible that it's over tensioned, and causing premature bearing failure.

Did you check if bearings are overheated?-It looks you have vibrations problems

Did you balanced the blower after cleaning?

NB

-Mr Lyn ,don't be so harsh you know that gaining experienceby doing mistakes

....and learning from them !! Ofcourse by asking the "right" questions....

Sir,

First of all thanks for your comment.

Yes offcourse i am an learner not an expert. Your guidance may brighten my future.

Sir,

About the topic yes we cleaned the blower but balancing not yet we have done. and we have even planning for dynamic balancing of the impeller.

Are you sure you're using the proper housing for the application and operating conditions?

http://www.skf.com/group/products/bearings-units-housings/roller-bearings/spherical-roller-bearings/appropriate-bearing-housings/index.html

Are you well within the service life estimates? You may need to check parameters of bearing operating environment such as alignment, operating temperature and conditions, check for proper lubricant and confirmation of lubricant delivery to wear locations....You may need to take one apart and do an evaluation....

http://www.skf.com/group/products/maintenance-products/index.html

The best procedure is to have the knowledge and experience that would render all your questions (this one and the previous ones) unnecessary.

No one here knows what the equipment is, what you are doing with the equipment, if you know how, and even do maintain it at all.

1. Read the manual for the equipment involved.

2. Follow the lubrication procedure recommended by the bearing manufacturer.

3. LOOK AT THE MANUFACTURER'S WEBSITE FOR INFORMATION. Read, and follow it.

4. Contact the field service department and ask them.

5. Hire a competent maintenance engineer.

The FREE advice you get here will be casual, at best.

Every question you have asked here could have been answered with a visit to the appropriate manufacturer's web site, or buy a call to a tech rep, or customer service, of the company who built and sold you the equipment.

Asking for help from unknown persons who know nothing about you, or your equipment, just wastes every ones time.

I have formed an opinion of you, but that should be obvious.

On a side note: asking for the proper lubrication procedure should be part of the process when firing up the machines for the first time! Your case sounds like: lubricants have been applied but the bearings are failing - could there be a problem with lubrication?

The answer would be yes! The proper lubrication schedule and procedure is unknown!

The corrective action is to change the failing bearings before the failure mode becomes more destructive.

Read the manual if in doubt and contact bearing manufacturer if manual is not clear on process. Preventative maintenance should include but its not an exhaustive list:

1. Check of lubricants

2. Check vibrations

3. visual checks (might need partial or full dismanteling of machine parts during standdard maintenance

4. log machine hours and replace bearings when run hours are due and for sure replace when overdue

5. check temperature development (lubricants can fail when bearing temperature is too hot)

good luck!

In the absence of the User Manual that was supplied with it, this sort of thing is an ideal topic for dicussion directly with the equipment manufacturer's Technical Helpline. It's only a phone call, and the advice will be direct, relevant and immediate.

It is really troubling why so few actually do this.

you're a little late in the game to begin a lubrication maintenance program. besides echoing most of whats already been said I'd add that I hope whoever has been assigned to perform this maintenance so far was consistent with the greases/lubricants so far and you are not mixing greases.like lithium with moly, etc. develop a schedule and stick with it, I suggest using these on grease fitting with ZIRK fittings

I see multiple possibilities.

Either the bearings are worn out and need replacement;

The machine itself is out of balance and you are seeing results in the bearing monitoring

Or possibly the parameter settings used on the bearing monitoring device are set too fine and giving a false "warning" status.

Or maybe the monitoring point for the device is not appropriate. (like on a cover or cowl instead of driect onto the bearing.

The bearing warning would also indicate whether the fault is periodic or general noise. These features of the results will give some indication as to whether the issue relates to general wear or to the bearing load or other possible scenarios.

Is the bearing warning happening for longitudinal direction as well as tangential?

Why Why analysis will give you idea.what type of lubricant using? . How is the alignment of equipment ?.what is the frequency of lubricatin ? .This will give you idea what method to be implement .

Hello Jackanil,

Your problem could be misalignment between the motor and the blower. Check very carefully that sheaves, belts, and everything that moves is square and true! Proper alignment is necessary for satisfactory bearing performance.

Frank Neal

A common cause of this type of failure is over-lubrication.

Most bearings are not designed to operate with the entire bearing cavity full of grease.

In order for the bearing to operate properly, maintain acceptable operating temperatures, and perform for the designed lifetime period, there must be an adequate air pocket inside the enclosure.

In many cases once the bearing grease cavity reaches full, exessive vibrations are induced and if not corrected, the bearing fails.

In most grease lubricated applications it has been proven that using pre-lubed, double sealed bearings that require no regular lubrication last much longer than bearings that are regularly being greased.

This information and much more valuable operating criteria is available from the bearing manufacturers.

how many checkers == what if likes to say it always (just a thought) versus any bearing with a good reading ( http://www.skf.com/binary/tcm:12-114679-16/140-710%20BIMG%2011_2012_tcm_12-114679.pdf == ??? google finds too easy to suggest misc. (such as OP hasn't seen - blah ...)) Hi!