A grease-oiled bearing can be lubricated manually, automatically (semi or fully), or for the duration of the bearing's life. While many bearings are regarded as "lubed for life," many others still require grease on a regular basis. A grease gun is the most popular method of lubricating a bearing. Lever action, pistol, and grip air-powered are among the options.

 

cre grease bearing

                                                                                                                                                                                               Source: machinerylubrication.com

 

The grease gun with the manual lever is the most prevalent while in other cases automatic lubrication systems are being used. A standard off-the-shelf shop gun may create 7,500 to 15,000 pounds per square inch of pressure. If the gun is operated incorrectly, it might be harmful to bearing seals. They usually carry 14 oz (400 gram) cartridges and can generate a variety of quantities per stroke. Providing a stroke and weighing how much grease is created is a good practice.

Most plants usually have a lubrication team during the day. Its job is to choose, store, and apply all of the plant's oils and greases. More crucially, the group has the necessary knowledge and experience to carry out these critical tasks. Despite the improvements, far too many facilities have lubrication strategies that are still woefully inadequate or disjointed.

 

Guide to Proper Grease Application

1. Right Type

Refer to the OEM manual for the initial stage in equipment lubrication, and contact the OEM if you have any questions. The instructions for older equipment may be outdated, and better lubricants may be available. If in doubt, consult your lubricant provider as well as your OEM. The type of lubricant used is chosen according to the application. In the lubrication of tiny bearings, grease is widely utilized. Grease can be used in the following ways:

  • To decrease drips and splatters, grease is an added seal to reduce leakage
  • To access hard-to-reach lubrication points, where lubrication frequency is important and oil circulation is impractical
  • To  address and prevent contamination such as water, dirt, and corrosives
  • To protect metal surfaces from rust and corrosion
  • To lubricate machines with intermittent operation
  • To suspend solid additives, such as moly or graphite
  • To lubricate sealed-for-life applications
  • When extreme or special operating conditions exist
  • When machine parts are badly worn
  • When noise reduction is important

2. Quality Grease

Product datasheets contain useful information on lubricants and their behavior in ASTM testing, which may then be used to predict how well they will function on equipment. Even if the lubricant is of the highest quality, if it is not treated properly during transport or storage, it will not work as expected.

The best practices for enhancing lubricant quality are summarized in the following list:

  • Utilize specification tests on product data sheets to compare lubricants.
  • Contact OEMs for minimum specification requirements.
  • Set standards on new lubricant deliveries, but be reasonable. During the delivery process, it is difficult to maintain high levels of cleanliness. Most hydraulic oils need to be filtered before use.
  • Utilize certificates of analysis for water content and viscosity on any delivered lubricants.
  • Routinely run more extensive tests with an oil analysis laboratory, to determine if a supplier is meeting minimum requirements.
  • Don’t use price as the main criterion in supplier selection.
  • Establish return criteria in lubricant contracts.

3. Proper Amount of Grease

Too much lubricant in a system can be as harmful as not enough. Grease guns must be calibrated for a number of shots per ounce delivery. This can be accomplished by weighing one ounce of grease on a postage scale. After you've calibrated your grease guns, strive to utilize the same grease gun type for each application.

4. Accurate Application

All lubrication sites should have the lubricant to be added clearly indicated. It is not a good idea to mix lubricants with various additive packages. Using various containers for different lubricant types is a smart idea.

5. Proper Lubrication Schedule

We need to develop suitable lubrication intervals once we've established our program with the right type, quality, volume, and location. But oftentimes with manual lubrication, ensuring that lubrication is done at the right time, right location, and with the right amount is difficult to consistently achieve. When you encounter this problem more often than you should, maybe it is the right time to consider if an automatic lubrication system is right for you.

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Lubrication of Rolling Element Bearings

Grease-lubricated bearings are still used in a lot of machines. In general, this bearing type is only suitable for low-speed, low-temperature applications. Hand-packing and field lubrication are the two ways utilized to lubricate this bearing type.

Hand Packing Bearings

Fill each bearing with new grease to the brim. If the bearing has already been used, properly clean it before applying new grease. Grease should not take up more than half to three-quarters of the total open area in the housing. Fully pack vertically installed bearings, but leave a quarter of the top cover and a quarter of the bottom cover grease-free. When properly mounting bearings horizontally, completely fill each bearing and the gap between bearings but leave about a fourth of the housing empty.

Rolling Elements Bearings Relubrication 

Installed rolling element bearings can be lubricated in two ways. The first procedure removes the bearing and repacks it as described above, while the second procedure greases the housing. It is relatively simple to remove old lubricants and accumulated contaminants using the first procedure. Clean the bearing well before repacking it with new lubrication.

In many cases, inadequate lubrication methods are inadequate and result in either too little or too much grease. When the bearing or housing is overfilled, the resultant friction and heat limit bearing life severely. Open the vent or purge port for a few minutes after start-up to permit excess grease to escape. Too little lubrication is more desirable than too much.

 

Le Price Lubrication Solutions

Spring Greasers

There are two types of spring-operated greasers available for greasing in difficult-to-reach regions or where consistent pressure is required. The reservoir capacity of the plexiglass variant is 50 cc, whereas the steel model is 80 cc. The Adams’ Grease cups are also available in a variety of sizes.

le price adams spring greasers

 

Subscription-based Automatic Lubrication System

 

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Increase your machine uptime and reduce your lubrication-related repairs and maintenance costs with no capital expense needed by subscribing to Le Price Automatic Lubrication System. With this solution, you can be sure that the right amount of lubricant (oil and grease) is applied at the right time, at the right place for your equipment, without the need for capital investment. 

 

Source: machinerylubrication.com