A grease seal, often called an oil or dirt seal, is a type of seal utilized to retain grease in a case or housing. Grease seals close spaces between stationary and moving components in mechanical equipment, helping prevent lubricant escape. Preventing harmful containments from entering machinery is another critical function of a grease seal.
What are oil seals and grease seals?
Oil and grease seals are used to retain or separate lubricants or fluids. These seals are primarily used for rotary applications only. The seal type for oil seals and grease seals can be oil seals or other types. An oil seal can also called flexible lip, radial lip, or rotary shaft seal.
What is a grease seal on a trailer hub?
Trailer Grease Seals Hub grease seals are available to help prevent water and dirt entering the hub and causing bearing failure. These should be inspected and replaced if signs of wear is noticed such excess grease build up on the inside of your hub. We offer double and triple lipped seals for all hubs.
Why do oil and grease seals have a spring?
Some oil seals and grease seals have a spring to help keep the lip in contact with the shaft. Oil and grease seals are used to retain or separate lubricants or fluids.
What are double lip grease seals?
The double lip grease seals are usually used in marine applications to give a better seal and protect the bearings from the water, which can cause damage to them.
What is the difference between an oil seal and a grease seal?
Oil Seals are used to seal around a rotating shaft and keep an oil-based lubricant inside an axle, engine, etc. Grease seals are used to seal more viscous grease lubricants in rotary shaft applications.
How do you install a grease seal?
2:588:55How to Install a Wheel Seal and Grease a Wheel Bearing - YouTubeYouTubeStart of suggested clipEnd of suggested clipYou got to make sure this goes in first of course you take it out the way you put it in the tapered.MoreYou got to make sure this goes in first of course you take it out the way you put it in the tapered. Part you can see it's tapered on this side it's narrower than out here.
Are grease seals reusable?
If you are replacing bearings it is usually best to replace the grease seals as well because although they may still be in good shape, it's very hard to get them out without damage which is needed to change the inner bearing. If you can remove it without damage and it's still in good shape then by all means reuse.
Which direction does a grease seal go?
Expert Reply: When replacing a grease seal, the metal part of the seal will face towards the inside of the trailer and the rubber part of the seal will face toward the back side of the wheel. The air side of the seal is the flat side of the seal and faces out when it is installed in the hub.
How do you get grease seals off?
0:061:20Wheel Bearing and Seal Removal on Older Vehicles - YouTubeYouTubeStart of suggested clipEnd of suggested clipJust simply flip the drum back on without the outer bearing or the washer get in there and go justMoreJust simply flip the drum back on without the outer bearing or the washer get in there and go just find the catch. One. All right there it is it comes out.
How do I know if my wheel seal is leaking?
2:474:55Spotting a leaking Wheel seal - YouTubeYouTubeStart of suggested clipEnd of suggested clipAnd you can see it's dobbed up pretty bad you see how wet looking it is right there look on the tireMoreAnd you can see it's dobbed up pretty bad you see how wet looking it is right there look on the tire.
Do I need to replace bearing race?
If the race surfaces are completely smooth and free of discoloration (most often caused by heat build up) then you can leave them in place and just replace and re-pack your bearings.
Is it OK to reuse bearings?
Reuse of bearings is strictly prohibited. If you have no choice, use the best you can.
Can you reuse bearing races?
You can't reuse bearing races. This is because they wear out over time, so it's better to replace them than try and save money by using old ones again.
Do you grease oil seals?
Never assemble an Oil Seal dry. Both the shaft and the Oil Seal have to be lubricated with oil or grease in advance. This eases the assembly and ensures lubrication from the beginning. If Oil Seals with fixed dust lips are being used, the space be- tween the sealing lip and the dust lip may also be filled max.
How are seals installed?
0:276:18Engine Oil Seal Installation Tips - How to Avoid Pitfalls and HazardsYouTubeStart of suggested clipEnd of suggested clipSo it's very important anytime you're installing a seal like that you coat this with a grease I likeMoreSo it's very important anytime you're installing a seal like that you coat this with a grease I like to use a thin coating of synthetic grease on the lip of the seal.
How can you tell which way a seal goes?
1:005:06Does the direction of an oil seal "always" face the same ... - YouTubeYouTubeStart of suggested clipEnd of suggested clipWhen you typically install a seal. This spring side usually faces the fluid manner we talked aboutMoreWhen you typically install a seal. This spring side usually faces the fluid manner we talked about that. So if you think about this for a second this right side crank seal on the Suzuki.
Which way does bearing seal go in?
Installation. A seal must always be installed so that the sealing lip is facing the fluid to be sealed. This is because the lip is made so that pressure applied to it from the “wet” side of the seal will tend to increase the pressure the lip applies to the shaft.
How tight should a bearing seal be?
1:121:48How to Grease and Install a Boat Trailer Seal Correctly ... - YouTubeYouTubeStart of suggested clipEnd of suggested clipIf you've got electric turn there's no shoulder to push into the seal will let all the greasy at theMoreIf you've got electric turn there's no shoulder to push into the seal will let all the greasy at the back. So I'm just tightening.
Do you grease bearing seals?
The need to change to sealed bearings was to reduce oil leakage through external seals. Previously oil-lubricated bearings were used where the same oil was used to lubricate both these bearings and the gearbox. With a sealed bearing, the bearing is lubricated with grease and the bearing seals give extra protection.
How do you install Marine seals?
Smear a little marine silicon on the axle seal surface. Apply a liberal amount of grease into the seal lips to reduce friction drag. Insert seal onto the axle journal that is smeared with silicon. Finally, insert the hub or disc rotor into position and lock with the axle nut.
What is grease seal?
Oil and grease seals are used to retain or separate lubricants or fluids. These seals are primarily used for rotary applications only.
What is an oil seal?
The seal type for oil seals and grease seals can be oil seals or other types. An oil seal can also called flexible lip, radial lip, or rotary shaft seal. Common configurations include single lip, double lip, triple lip, and four or more lips.
Why do oil seals have a lip?
Oil seals and grease seals have a flexible lip that rubs against a shaft or housing to prevent the leakage or ingress of fluids and dirt. For proper installation, the seal lip should point towards the medium being contained. Some oil seals and grease seals have a spring to help keep the lip in contact with the shaft.
What is a symmetric seal?
V-rings are considered external lip seals. A symmetric seal is symmetrical and works equally well as a rod or a piston seal. An axial seal seals axially against a housing or machine component.
What is bearing isolator?
Bearing isolators are dynamic seals designed to protect bearings from outside contaminants. They are comprised of a rotor (rotating) and stator (stationary) member. Some bearing isolators are of labyrinth construction while others use O-rings or other positive seals.
Do seals have proprietary material?
Many seal manufacturers use their own proprietary material. Consult with manufacturer for proprietary material specifications.
What is grease seal?
Also known as grease seals, these are designed to retain thick lubricant at low pressure. They have a light grip on the shaft that creates less friction than spring-loaded seals.
What is oil seal?
Also known as oil seals, use these to retain oil on rotating shafts in motors, pumps, bearings, and gearboxes. A spring secures the lip against the shaft, preventing messy leaks. Press-fit seals into the bore around the shaft.
What is a U cup seal?
Also known as lip seals, U-cups have a sealing lip on both the inside and outside edges, so they can be used for rod and piston sealing.
What is an extended spring on a seal?
An extended spring on these seals accommodates variations in seal cavity length and pump misalignment.
How fast does a pump seal work?
Built for high-speed circulation and dispensing pumps, these seals have a short spring that facilitates speeds up to 10, 000 rpm.
How hot can a sealer withstand?
These seals are fluoroelastomer, so they have excellent chemical resistance and withstand temperatures up to 390° F.
Can you swap out old seals?
Swap out old seals without disassembling components — these seals come split for easy installation. They're also known as clipper seals.
What is grease used for?
A firm consistency and resistance to evaporation make this grease ideal for vacuum applications, such as flow meters, vacuum and pressure systems, and laboratory equipment. Apply directly to seals and O-rings to prevent drying and cracking.
What is the best way to keep grease from drying out?
It remains intact when exposed to water and most solvents and chemicals. Apply directly to plastic and rubber seals and O-rings to prevent drying and cracking.
What is Jet-Lube Ezy-Open?
Jet-Lube Ezy-Open is a grease-like liquid that contains detergent and PTFE additives to clean more effectively than grease while it lubricates. Since it is a liquid, it does not have a NLGI viscosity grade, but is less viscous than anything else in our offering.
What is the difference between grease with moly and zinc?
Grease with PTFE has small particles of PTFE that reduce friction and help the grease maintain its lubricity. Grease with zinc neutralizes acid and is a good replacement for leaded grease .
What is Dupont 55 O-Ring grease?
DuPont Molykote 55 O-Ring Grease is silicone- based, so it can be used with most rubbers and plastics. Not recommended for use with silicone rubber, polycarbonate plastic, or ABS plastic. Chemours Krytox™ 240AC Type III resists most acids, bases, solvents, and fuels, and is long lasting with an indefinite shelf life. Loctite® Krytox™ RFE PFPE LB 8209 handles extreme temperature swings, resists acids, bases, and fuels, and is long lasting. It can be used under high loads.
What is the viscosity of oil?
Viscosity is the thickness of an oil. Rated at 100, 000 centistokes (cSt), this oil has the consistency of honey, so it stays in place.
Does silica grease wash off?
Thickened with silica, this heavy grease clings to parts so it won't wash off in wet environments. Apply directly to plastic and rubber seals and O-rings to prevent drying and cracking.
How to determine what grease seals are needed for a spindle?
The best way to determine what grease seals are needed for your spindle is to get the part numbers from the inner and outer bearings from that spindle. If you have the bearing part numbers, then I can help you get the correct single lip or double lip grease seal that you will need. See the picture to the right that will show the cross section ...
What is the difference between a single lip and a double lip seal?
The difference between the single lip and double lip seals is that the double lip grease seal will have two rubber lips that are in contact with the spindle. The double lip grease seals are usually used in marine applications to give a better seal and protect the bearings from the water, which can cause damage to them.
What is the difference between oil and grease?
Both aim to lubricate equipment and prevent damage through metal to metal contact. However, there are a few key differences in how they are used. To put it simply, grease is oil mixed with a thickener and other additives.
Why use grease over oil?
But why use grease over oil? Greases are better for leakage control and provide better seals against contaminants. Grease can remain in equipment longer and tolerate a variety of conditions. It is also easier to apply in most industrial settings. The best greases should tolerate some contamination, resist leakage and change in consistency and be compatible with all seals.
Is oil better than grease?
Of course, oil has advantages as well. It’s easier to drain, easier to control the amount you are using and much cleaner than grease. It also provides better cooling properties. Oil is also better for extending the life of bearings, as oiled bearings can last twice as long as greased ones.
What Is Plumber’s Grease?
So, what the heck is plumber’s grease, anyway? Plumber’s grease is a waterproof product made of silicon oil and grease. It looks and feels like Vaseline, but don’t be fooled. Plumber’s silicone grease is much more durable than Vaseline. It’s thick, food-grade, waterproof, and will last a long time.
Why use a lubricant for a faucet?
It’s used for lubricating faucets and other plumbing fixtures to increase product life and prevent issues like that annoying squeaking.
Do you have to take a faucet apart to grease?
Well, it’s fairly simple. Nowadays, most faucets have cartridges inside, so you will have to take it apart to apply the grease. Doing this regularly to your faucet handles and cartridges will make the fixture preform better, prevent stiffness, and will prevent buildup and rust from happening.
Do shower heads need grease?
Most new plumbing fixtures come “pre-greased” but some faucets and shower heads will recommend applying a little silicon grease to the moving parts to allow ease of operation and prevent any annoying squeaking from occurring. Check with your fixture’s manufacturer for recommended lubrication points. Plumber’s grease is also used by, well, plumber’s ...
Can vaseline break down a faucet seal?
We mentioned Vaseline is similar, but since most faucet seals and O-rings are made of Nitrile Butadiene Rubber, Vaseline can break down the products in it and ruin the seals.
Can you use plumber grease on faucets?
Conclusion. To sum it up, if you have faucets, you should be using silicon plumber’s grease. Even if you aren’t experiencing the terrifying squeak that can occur, it can be prevented. With a little plumber’s lubricant, you lubri- can prevent wear and tear and increase the longevity of your faucets, too!
Is plumber's grease safe for plumbing?
Check with your fixture’s manufacturer for recommended lubrication points. Plumber’s grease is also used by, well, plumber’s for O-rings, gaskets, cartridges, handles, swivel joints and other moving parts on plumbing fixtures like toilets, showers, and faucets. Because it’s safe for potable water you’d be surprised at all the plumbing places ...
