1) Soak your bearings in mineral spirits or paint thinner to remove any grease or particulate.
2) Blow bearing out with compressed air.
3) Place a light drop of oil on the bearing.
4) Give the bearing a spin, if they still feel rough repeat steps 1-3.

Maintenance depends on the type of enclosures and lubricants your bearings have. Rubber sealed or Ultra sealed bearings require no maintenance and the lube is good for the life of the bearing. Metal shielded bearings that use either grease or oil should be constantly maintained and frequency level with vary depending on your application. Oil dissipates faster than grease, so typically shielded bearings using oil as lubrication will require constant care. Developing a regular maintenance schedule will substantially add to the life of your bearing.

Bearing lubricant should establish and maintain a micro thickness separating film of oil between rotating and static members. The forming of the elastic hydrodynamic film is the result of a build-up wedging action of the lubricant between rolling elements and raceways.

Bearings do fail for many reasons, but improper lubrication is there at the top of the list. And rests are the following:

43% due to improper lubrication;
27% due to improper mounting;
21 % due to other causes and
9% due to reaching the fatigue limit of the metal.

Reasons for lubrication failure are following:

1) Incorrect selection of the grease base for a particular application.
2) Use of static or circulating oil in a improper manner.
3) Insufficient lubrication either in quantity or in required viscosity.
4) Deterioration of prolonged service without proper intervals.
5) Contamination of the lubricant and the bearing with foreign materials.

Over lubrication might be your problem. As unlikely as it may seem, over lubrication as well as insufficient lubrication of bearings used in high application, both are equally harmful. Over lubrication creates action of oil or grease, which increases the friction and the torque characteristics of the bearings. Hence, to operate over-lubricated bearing at a high temperature is probably the source of your trouble in getting the "hot" results.

The best right way to store bearings is to put them in a clean and dry place.Always use the oldest bearing first. Bearings are the precision components and should be treated gently. Never drop them or handle them roughly. In fact, the less you handle them the better since finger printers can lead to rusting. It is necessary to measure temperature changes in your bearing storage area regularly because the condition like condensed moisture forms could be harmful for bearings.

The shield is attached to the outer race and it is a clearance between the outer and inner race. On the other hand the seal is attached to the outer with the inner race. The main reasons of not using seals in all applications instead of shields, are:

1. Speed ; 2. Heat ; 3. Starting Torque The seal could cause problem in these areas due to its rubbing against the inner race and in the case of shield, there is a clearance between outer and inner race and then there is no such kind of problem.

If your bearings begin to feel gritty or notched to the touch, they should be replaced. When bearings sit idle for a long time, they must be protected from any moisture. If any moisture has gotten to the bearings, they will need to be replaced.

This is not too much surprising, really, when one thinks of all that might have happened in assembly, in transits, in setting up, etc.

First, the subassembly might have been dropped or bumped hard or pressure might have been applied to the wrong ring during assembly which would have resulted in brine ling or a ball denting the raceway.

Second, perhaps the jolting, jostling in shipment or the unit setting idle where there was extreme external vibration, resulted in metal to false brine ling. These are just samples of some of the more obvious and common problems. On the above, simply replacing the bearings should solve the shaft and housing dimensions must be checked.

There are 3 factors that need to be looked at:

1) Operating Environment: If machines are to be kept in peak operating condition, then bearings should be properly aligned and protected from extreme temperature moisture and contaminants.

2) Proper Installation: Skills to property install and the help of right tools are required to ensure that bearings are not damaged

3) Proper Maintenance: Lubrication and maintenance schedules must be followed as well as monitoring bearing operating conditions

Lubricant type and quality. Heavier lubricants such as grease for longer life. Lighter lubricants such as oils for freer running.

Quality of the bearing steel. Bad quality steels can fail very quickly.

Internal axial and radial clearance (how much movement there is in both directions when the rings of the bearing are pushed in opposite directions). Too little and too much clearance can both be detrimental to bearing performance. You can usually feel this movement with your fingers but you will not be able to determine whether it is within acceptable limits just by feel. If you want more speed, you will want to loosen up the internal clearance to allow the bearings to spin more freely.

Manufacturing quality control and cleanliness.

Each bearing is individually lubricated, coated with a rust preventative and wrapped before being placed on a skid or in a wooden box. Multiple bearings may be put on the same skid / box.

You may direct your inquiries directly to UNIWELD Bearings' Sales and Marketing department via email at sales@uniweldbearings.com at any time.

No. We only accept payment in advance via Telegraphic Transfer for order less than USD100,000.00. Any order more than USD100,000.00, we are open for Letter of Credit (L/C) options.

UNIWELD Bearings offers a one-year warranty for workmanship and materials.

Not typically. Occasionally, on a case by case basis, extended warranties are negotiated and prices are adjusted accordingly.