Description   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.   Oil and grease seals are used to retain or separate lubricants or fluids. These seals are primarily used for rotary applications...
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Q & A on Oil Seals and Grease Seals

We asked our users for their input on Oil Seals and Grease Seals. Here are the results of 66 users familiar with Oil Seals and Grease Seals.

Who Took Our Poll? | Design Trends | Applications and Use | Features | Buying Advice

Who Took Our Poll?Top

Design TrendsTop

Q:
What new technologies are influencing oil seal and grease seal design?
10 answers
Answers:
Generally ptfe seals. Also chip on lip is going to be a good feedback for special applications.
~Coskun K, Manufacturer, Izmir, Turkey
Useful designs with very low demand. That is, production runs of 144 or less.
~Mike E., Retired Customer Engineer, Sharon,, TN
Use of HNBR and PTFE to overcome higher temperatures and speeds.
~Randy W, Engineer, Waterloo, IA
New elastomers, new lubricants, new surface coatings
~Joe H, Motor racing, Bendigo, Australia
This is just an old and traditional spare parts.
~James Lai, Manufacturer, Nan-Tou, Taiwan
Dedicated domains/applications extra sealing
~Purchasing, Constanta South Agigea, Romania
Synthetic oils and greases
~Larry C, Maintenance supervisor for IU Health monorail, Indianapolis, IN
Hydraulic & pneumatic
~Purchasing, Granite City, IL
New materials
~Roger K, Busines development manager, Plymouth, England
Rotary seals
~Oscar P, General Management, Bucaramanga, Colombia

Q:
From your perspective, which companies are creating the most innovative oil seals and grease seals?
11 answers
Answers:
Freudenberg (Germany) and CR SKF (USA)
~Coskun K, Manufacturer, Izmir, Turkey
Most established manufactures
~Roger K, Busines development manager, Plymouth, England
1.Trelleborg 2. Freudenberg
~Randy W, Engineer, Waterloo, IA
CR, JM, Garlock, National
~Purchasing, Granite City, IL
MOOG, Spicer, and Dana.
~Mike E., Retired Customer Engineer, Sharon,, TN
SKF...and many other
~Purchasing, Constanta South Agigea, Romania
National oil seals
~Oscar P, General Management, Bucaramanga, Colombia
SKF-(CR seals)
~N.S.Devagiri, Senior Manager (Mech), Bacheli, INDIA
NBK, CBC, KAK
~Joe H, Motor racing, Bendigo, Australia
Cfw & NOK.
~James Lai, Manufacturer, Nan-Tou, Taiwan
Timken
~Larry C, Maintenance supervisor for IU Health monorail, Indianapolis, IN

Applications and UseTop

Q:
What are some of the applications you have used oil seals and grease seals for?
16 answers
Answers:
Oil seals - often called grease, fluid or dirt seals - close spaces between stationary and moving components in mechanical equipment, helping prevent lubricant escape,oil seals help prevent abrasives, corrosive moisture and other harmful contaminants from entering machinery. They also help stop intermixture of two different mediums, such as lubricating oil and water.
~Marketing/Sales, Sharjah, United Arab Emirates
Sealing olde British motor cycle engine main shafts. Unfortunately some idiots removed the seal allowing the engines to breath into the primary drive area which does not give good crankcase breathing.
~Engineering, Design, Chelmsford, Great Britain
Automotive, monorail drive and guide wheels, maintenance and recovery vehicles for IU health people mover system
~Larry C, Maintenance supervisor for IU Health monorail, Indianapolis, IN
Reduce oil and lubricant leakage from designs used on classic automobile and truck applications.
~Mike E., Retired Customer Engineer, Sharon,, TN
1) Screen bearing oil seals 2) gearbox input and out put seals 3) pump oil seals
~N.S.Devagiri, Senior Manager (Mech), Bacheli, INDIA
All rotary shafts need seals whether rubber or leather.
~Roger K, Busines development manager, Plymouth, England
Agricultural and construction machinery/ tractors
~Randy W, Engineer, Waterloo, IA
Terminal tractors and gantry cranes
~Purchasing, Constanta South Agigea, Romania
Motors, compressors, machine tools
~Maintenance/Facilities Management, Botosani, Romania
Motors, bearing cover, Vehicles
~James Lai, Manufacturer, Nan-Tou, Taiwan
Machine tools, motor vehicles
~Joe H, Motor racing, Bendigo, Australia
Tractors, cars, trucks, ect.
~Purchasing, Granite City, IL
Industry and cars vehiculos
~Oscar P, General Management, Bucaramanga, Colombia
Automotive and Industrial
~Coskun K, Manufacturer, Izmir, Turkey
Pumps, Gearboxes,Engines.
~Maintenance/Facilities Management, Couva, Trinidad and Tobago
For shaft and housing
~Engineering, Design, MUMBAI, India

Q:
Please share with us any “non-standard” applications that oil seals and grease seals have been used for.
4 answers
Answers:
There is no non-standard design but a lot of non-standard sizes for oil seal and grease seals.
~James Lai, Manufacturer, Nan-Tou, Taiwan
Retrofit to machines in service 50 years or more.
~Mike E., Retired Customer Engineer, Sharon,, TN
Linear bush shaft seals (non rotating elements)
~Joe H, Motor racing, Bendigo, Australia
Bicycle
~Oscar P, General Management, Bucaramanga, Colombia

Q:
Do you know of any disastrous mistakes that occurred due to the incorrect usage of oil seals and grease seals?
4 answers
Answers:
Well known hydraulic hose company replaced their special design seals with an unknown company's simple design . 8 days later they had to stop the whole unit for one day just to find out what happened. At first cost saving was 10 $. After they changed the seal 2. times I did not want to ask them how much it cost as some of them already lost their job.
~Coskun K, Manufacturer, Izmir, Turkey
Just one: oil seal in racing motorcycle front fork: installed with inner invisible lip folded under - oil everywhere with brake application and riders falling off in the thick of first bend due to fork oil all over road....
~Joe H, Motor racing, Bendigo, Australia
Yes, a seal may work fine in ordinary conditions, but corner conditions can create big warranty problems.
~Randy W, Engineer, Waterloo, IA
Taking it out
~Oscar P, General Management, Bucaramanga, Colombia

FeaturesTop

Q:
What would your design or feature "wish list" be for this product?
7 answers
Answers:
Elimination of lubricant leakage from stress and age. Strive for the permanent fix!
~Mike E., Retired Customer Engineer, Sharon,, TN
Small physical dimensions, wide operating temperatures, longevity
~Joe H, Motor racing, Bendigo, Australia
A seal which controls and renews itself whenever locking occurs
~Coskun K, Manufacturer, Izmir, Turkey
Easy fetch, easy buy.
~James Lai, Manufacturer, Nan-Tou, Taiwan
Double lip seal
~N.S.Devagiri, Senior Manager (Mech), Bacheli, INDIA
More durable
~Oscar P, General Management, Bucaramanga, Colombia
Longer life
~Larry C, Maintenance supervisor for IU Health monorail, Indianapolis, IN

Q:
Is there any advice you want to share with users to help them avoid common errors in selection or usage of oil seals and grease seals?
7 answers
Answers:
Instead of simply purchasing/using the seal, better to check the requirement parameters and condition of application and select the grade of material to get maximum life of seal.
~N.S.Devagiri, Senior Manager (Mech), Bacheli, INDIA
Always choose a company who puts their name on it. They have so much to lose. Keep them in the dark. ALWAYS use installation tools. NEVER re install the seal.
~Coskun K, Manufacturer, Izmir, Turkey
Watch out for gotchas with new lubricant compatibility with seal elastomers.
~Joe H, Motor racing, Bendigo, Australia
Proper installation is more important than material select.
~James Lai, Manufacturer, Nan-Tou, Taiwan
Be sure to beta test before releasing to your customers.
~Mike E., Retired Customer Engineer, Sharon,, TN
If the design is new in any way, test in lab and field.
~Randy W, Engineer, Waterloo, IA
Put the oil seal with a little lubricant.
~Oscar P, General Management, Bucaramanga, Colombia

Buying AdviceTop

Q:
Do you have any advice for people relative to buying or using oil seals and grease seals?
7 answers
Answers:
Don't buy cheap seals as you will be replacing them more often thereby increasing labor costs.
~Larry C, Maintenance supervisor for IU Health monorail, Indianapolis, IN
Ask as many questions re operating conditions as possible.
~Roger K, Busines development manager, Plymouth, England
Most expensive seals may not be the best seals around.
~Coskun K, Manufacturer, Izmir, Turkey
Use sealing surface protection during installation.
~Joe H, Motor racing, Bendigo, Australia
Use higher grade of material to save repair time.
~James Lai, Manufacturer, Nan-Tou, Taiwan
Go for the quality over cost.
~Mike E., Retired Customer Engineer, Sharon,, TN
Buy from reputable companies.
~Randy W, Engineer, Waterloo, IA


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