sealed bearings vs greasable bearings

It is an especially great problem solver in washdown applications, keeping moisture out when high water pressure is applied to the bearing. Whether the heat source is internal or external, bearing seals, typically made of rubber or plastic, risk melting if the temperature reaches 212 F. If the lip of the seal melts off, pieces of it can enter the raceways, stopping the balls from turning and causing the bearing to fail. A sealed bearing is just to keep oil & gease in Dirt out. Breakers, Power Packs & Jump We went through the exercise of making sure the grease is compatible with what the manufacturer and rebuild shop uses, researched the amount to use and frequency based on size and service and set up the task accordingly. Furniture, Boat Seat Pedestals & An AFBMA number might look something like 90BC03JPPN30X. Wells, Toilet & Waste You must know what it is that you are aiming at. Fenders, Boat Trailer Also, it holds on lubrication hence, preventing friction. Telescopes, Covers and Towers, Tow Ropes & Seats, Fishing Boat Helm Seats, Shop Boat Gel Coat - Spectrum Color, Pumps and I bought a Toro because of the greasable roller bearings on the mower deck after much research. Trolling Motors, Shop Bearing life in 1800 rpm motors seems to average between 15 and 20 years, with the number of problems increasing after 12 years. Meters, Marine Electrical Panels Greaseable = single lip seal, somewhat soft rubber, rounded shoulder facing center cross, indistinct sealing area on bearing journal. The most common hanger bearing materials are described in the table below. Greasable bearings regulate grease flow into the path, but they control the extra amount entering the bearing. JavaScript is disabled. Bearing speed and size are important factors. Financing, Iboats We and our partners use cookies to Store and/or access information on a device. But how do you know which one to choose? I'm getting concerned It means that less oil is spilt. Learn more about it. bearings with isolators (i.e. ZZ vs 2rs bearing Sealed Bearing Generally used in smaller motor applications. Fortunately, most motors and bearings are labeled using either the SKF or Anti-Friction Bearing Manufacturers Association (AFBMA) coding systems. Biggest problem on greasable bearings is most people over grease em. Your email address will not be published. Now a question arises which is the best bearing? Do you think blade spindles pull a load greater than 80,000 pounds? Not to mention in most cases if I can't see it, it's hard for me to tell if there is enough. I always thought the biggest problem with greasables was that people NEVER grease them. Deals, Dealer Honda 5hp Outboard, Boat & I don't say that like muffler bearings or tail light antennas, just be sure to use the correct grease. STEP 9. All, Boat Bimini Then water and dirt can get in where the grease will eventually work its way out. Our oil bath bearings use 90 weight gear oil and they utilize dual-tapered roller bearings. RZ-non-contact rubber cover seal. Shielded is sort of a compromise in the middle bewteen the extremes of sealed and open. I suspect that these motors are in a hot environment (roaster ovens), thus I would go for regreasable (shielded bearings). Developed from the racing industry, it was designed to create less contact between the rubber lip of the seal and the inner ring, which reduces friction and heat. 1.7 Motor . Oct 24, 2011 / Spindle Bearing Lifespan? All, Anchor & Have you searched for "greasable" bearings? Seats, Fishing Boat Fasteners, Boat Windshield 1946 Chevy 1.5ton Flat bed. How to Tell the DifferenceThere is a difference between shielded and sealed bearings. Varnish, Marine Adhesives, Zz is a non-contact and non removable bearing closure having a metal seal on either side. They are sealed ball bearings and they draw moisture when mowing in damp weather. Racks, Fish Finders, Sounders #1. Whether the heat source is internal or external, bearing seals, typically made of rubber or plastic. You also need to mindful of what your motor shop is doing. Never gave me an answer though. Protection, Dock Storage & #17. The fan motor in question has been installed and commissioned by an (big) EPC contractor 11 years ago, an overhead fan cooler for hydrocarbon products, and there was no flow path for the grease. Premature failures, like those of the first-generation Chevy Trailblazer or Ford Transit Connect, contribute to a negative perception of the sealed joint . Video, GPS Chartplotters & It seems 21752712 is in fact a serviceable Gimbal Bearing produced by SKF, and replaces Part# 3888555 (which was the Sealed Gimbal Bearing, and replaced the original greasable gimbal bearing part). I would stay away from lithium based greases on electric motors, i see shortened bearing life on that combo. Matt. Public CRL Certification Renewal Information, Public CMM Certification Renewal Information, http://www.bardenbearings.com/PDF%20CD/MACHINET.PDF, http://www.924.id.lv/Heynes%20Manual%20924/10_Suspension_files/image012.gif, http://www.timgilles.com/photogallery/Service/57.14macstrutexplodedview.jpg, http://www.reliance.com/prodserv/motgen/b9652new/b9652.htm#b, The boiler motors have double shielded bearings (regreasable in theory), Grease dried up, because of the hot environment. Storage This practice reduces contamination and prevents lubrication leakage: see Sealed Bearings, below. We're sorry. Sockets, Marine Electrical CheckSolvent For Cleaning Bearings. You can regrease a shielded bearing, but you should not be regreasing a sealed bearing. Locks, Boat Deck Boat Repair, Boat Paint & The Right Fit, Shop By between 1000-1800 psi could potentially fold the lip of the seal and allow water to get into the bearings. A bearing without a purge path does not mean it is sealed. The removal of the shield is impossible. Biminis, Paint and Also, during operation, rolling elements are protected from large contaminants. Simply as an Amazon Associate, we earn from qualifying purchases. Do not use cheap grease either. Handles, Life Jackets & Most of my clients (who tend to be small to medium sized operations) have improperly lubricated enough motor bearings to know that it isn't as easy as you'd think. Re: Pillow block bearings vs flange. Required fields are marked *. One thing I noticed, other than the obvious sealed vs greasable, was the seal on the bearing cups. If you pop off the seal and pack it with grease what will happen is all of the grease is going to hold heat until it gets so hot the oil in the grease will eventually seperate itself from the thickener . And I think sealed would be a good idea. Accessories, Marine DC Power Plugs Bearing closures come in two most common types, ZZ and 2rs. your boats Gel Coat Match, Shop Come join the discussion about performance, modifications, classifieds, troubleshooting, maintenance, and more! Software, Digital Privacy Policy     They guarantee a longer bearing life when revealed to heavy airborne dust and splashes out water. Insurance, Boat Accessories, PWC Parts & Also, they are environmentally friendly as oil spilt is considerably less. If not, you probably never will have one. On the other hand, shield bearings have no contact with the inner ring. Alswagg said: Bravo gimble bearings are now sealed. moisture and dirt bearing manufacturers have designed shields and seals to keep the bearing clean from Sealed or Shielded Bearings? Also, excessive pressure can force guards against the cage. Manufacturer, Boat Tables & Trailer Winches, Shop I feel that sealed bearings are just as long lasting as greaseable bearings. Blocks, Marine ZZ-dust cover seal. Save my name, email, and website in this browser for the next time I comment. & Sonar, Trolling It helps to keep the grease in the bearing. Parts, Wash Down AN I have my opinions, but figure that some of you probably have better informed opinions (than mine) and wondered what your thinking is on this question. High Back Reclining Helm Seat, Cabin and Boat, Sell A After all, performing scheduled maintenance at regular periods is an age-old concept. In fact, you probably drove on some sealed bearings today. Mounted Solid-Block Spherical Roller Bearings for Rugged Applications, IBT Launches Its New, State-of-the-Art Industrial Training Lab, Discover How You Can Extend Sprocket Life & Increase Uptime, Improve Your Operations with Agriculture Duty Mounted Ball Bearings, Discover the Next Level of Quality Electric Motor Bearings, Key Factors for Determining Bearing Tolerance, Conveyor Belt Troubleshooting: Common Causes & Solutions. These limit the entry of contamination greatly. You are using an out of date browser. Ventilation, Interior & Cabin COMPANY. I like sealed bearings in most applications. Ropes, Boat I think a greasable bearing is still the way to go unless you like disassembling it a lot. No matter what the rated life of the bearing it all comes down to heat. Kits, Seadog Stainless Steel Cup Galley, Covers and Guide, Boat Detectors, Binoculars & decided that more motors were failing from overgreasing than lack of grease. By marking the machine, it will allow technicians working on the machine to also avoid lubricating . Yes, you definite want to lube the gimbal bearing with gimbal bearing grease. In general, a "bearing" facilitates movement between two parts while reducing friction. Familiarize yourself with sealed and non-sealed bearings . Further development. When this same technology is applied to load-bearing ball joints, or used in commercial or fleet applications, service life can be compromised. Cable, Marine Batteries & I probably use more grease than is required, & the price is sure not going down. Shielded Bearings Vs Sealed Ball BearingsTo combat the contamination of a bearing by moisture and dirt bearing manufacturers have designed shields and seals to keep the bearing clean from Sealed vs. Shielded Bearings - Practical Machinist - LargestSep 9, 2012 The bearings are inside the bell housings, where they are protected from direct . Dock, Cabin and Steel housings are far stronger than cast, and anything is stronger than cheap Chinese. Sealed Linear Bearings. Logged. Machinery likes this method. Really depends on the customer. Sad to say, but Sean is right about questioning the wisdom of greasing motor bearings. Contact ones offer better protection but lack speed proficiency, whereas the non-contact ones have higher speed capabilities, and their protection levels are superior to shields. U can easily see if your bearings have lube and spot problems sooner. Switches, Shore Power & AC Deals, Electronics They are mounted under the ovens, with the non-drive end up. Motors, Fishing Downriggers & Jacks, Boat Trailer Brakes & Hardware, Boat Seat I've never had trouble with a greasable Scag spindle, I'm just a little worried about the sealed spindles on the Exmark. I feel like the price difference (if there is one) would be saved soon with time and grease savings. Bill of materials. I'm switching to Exmark or Toro because I don't get along with the local Scag dealer. introduced the RD Type (Light Contact) Sealed Ball bearings for exactly that purpose. Deals, Dealer Otherwise double-shield (regreaseable!) It doesnt require regular maintenance. Above all, remember to re-lubricate bearings on schedule and to the right specification. 5,828. Seats, Pontoon Boat Seats & The shield is a metallic disc, whereas the seal is inserted into a minor groove. 6 Reasons Bearing Isolators Leak Lubricant | Pumps & SystemsAug 9, 2017 The most common perception of bearing housing seal failure on to the proper level, bearing isolators will generally stop leaking and return to Sealed or Shielded Bearings? For exampleA larger bearing (40mm bore / 80mm od) can handle up to 5,600 rpm sealed, while a smaller (10mm bore / 30 mm od) can handle up to 17,000 rpm sealed. Under-lubrication causes early failure. Re: Greasable vs non-greasable gimbal bearing, CREATE Learn more about it here. 11 million revolutions on a 3600 rpm machine is < 51 hours, just over 2 days. Designed to stand up to frequent washdowns, you can quickly secure these ball bearings onto shafts with the clamp-on collar in food, beverage, pharmaceutical, and chemical plants. Lighting, Marine Teak Both works for the same purpose, and they have their pros and cons as well. I've been thinking real strong about replacing the grease-able bearings with sealed, then replace the zerk with a plug, at least as the bearings have to be replaced. Ball Joint Engineering: Greasable And Sealed . Accessories, Boat Lift Canopy Drink Holders. Double sealed bearings are preferable when bearing arrangements carry the load capacity of a single row bearing. Not had any more go out, but some are getting kinda loose. And I assumed the drive end was the coupling or sheave end, since that is the end that is "driving" the application (and which usually has the bigger bearing). As the world's third largest bearing manufacturer, we have over 68 plants worldwide and 100 years of premium . So there are probably compatibility issues, plus I have serious doubts about this grease in general. Is the sierra gimbal bearing still the preferred bearing over the mercruiser bearing due to not being greaseable. I bought the rake used, 1 wheel was getting pretty 'floppy', so I replaced that bearing then. Accessories, Marine DC Power Plugs & Circuit 2021 Association of Asset Management Professionals Inc.    Parts, Boat Tubing & Cartridge bearings are the most common type of bearing used on anything but the very cheapest bikes. All, Boat Bimini If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page.. Shields are no point of contact between the bearing inner ring and the shield bore. Since there are completely sealed bearings out there i agree I would not use it or he has a wrong part since the bravo manual refers to the alignment hole . Parts, Inflatable Until now, we have come to know enough about sealed bearings and shield bearings. They can run cooler. Hardware, Boat I have greasable replacement parts in my wife's old f-150 and am fairly confident that greasing everything every 4-5K at an oil change will keep those parts good for a very long time. Parts, Sacrificial Anodes & Style 216 and 226 bearings are the most widely used and are in stock at KWS. These two are essential parts of deep groove bearings. Helm Seats, Shop You can regrease a shielded bearing, but you should not be regreasing a sealed bearing. Sep 26, 2011. I had the same question I have a that is Grounds master for a country club He says that He will not buy any equipment that you can not grease. The mercruiser permalube bearing part number is 30-879194A01 is not greaseable. Guide, Boat However, it is safe to say that sealed bearings are better than greasable bearings as they come pre-greased from the factory by 25-35%, which prevents the need to do the frequent greasing. Prefer greasable myself for most applications. They have a relatively higher capacity to carry the load. Finally, remember that there is a difference between shielded and sealed bearings. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. 1997 Volvo Penta 7.4GI PLKDCE, drive unit s/n: 4112026411. Systems, Marine Plumbing To ensure that you will make the right decision, it's important to consider the construction of a ball bearing, and how it influences the overall performance of the device. These bearings are not re-greasable which saves from the need to re-grease but limits the overall bearing life. #2. Both are non-contact seals, and shields permit reduced rotational torque as there is no contact to the inner ring. Sid. & Dock, Anchor Chains & Plus the Alpha gen 2 now sealed. Re: Greasable vs non-greasable gimbal bearing. Accessories, Big Jon Ball Joints: Greasable And Sealed . NTN seal and shield type ball bearings are built to meet these trends. Advantage: BTW, I see vertical motors quite often mounted with the drive end up. guess those are "abnormal" motors? Products, Carbon Monoxide & The decision to choose between these two is highly dependent on environment and application. Socialism is people pretending to work while the government pretends to pay them. Systems, Lowrance Hook2-4 GPS ", The Fora platform includes forum software by XenForo, VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Switches, Shore Power & AC These codes are the best way to determine if a bearing is sealed. Forgot to mention this is a food processing plant and only food-grade grease is used. Towers, Tow Ropes & Lucas Oil X-Tra is a 14-ounce, heavy-duty wheel bearing grease that comes with an affordable price tag. When trying to decide whether a bearing is sealed using the AFBMA or SKF code, note the shields or seals section. Covers, Boat Shrink Wrap Tubes, Shop Wichita Falls, TX. Many sealed bearings on it, most of the rollers do not have grease zerks due to the bearings being sealed and non greasable. Forums, Find Kits, Boat Trailer P/C Pete. Have you considered a moly based grease? Systems, Marine Plumbing Boat, Boat Buyers GW211PP17. Sealed bearings are generally used for lower speed machines,75 hp and have a predicted life span of about three years. Plumbing, Fresh Water Boat A few failures start to occur after 6 to 7 years. If housing has no place for seals and a grease fitting, then you would use bearings that are sealed on one side. When it comes time to replace any bearing components, the "type" of bearings or bearing assemblies you need are determined strictly by how your exact vehicle was engineered from the beginning. Starters, Marine Solar Power Outboards, Shop Biminis, RV & Trailer Parts, Boat Tubing & Accessories, Marine Electrical As mentioned by Dan the newer mist (air/oil)systems do a better job of preventing the mess. I took the hub caps off and installed a grease zerk on each one. However, the greasable ones that Moog is currently . Huh. Both non-contact seals and shields allow reduced rotational torque as there is no contact to the inner ring. Howdy, You'll get varying opinions but consider front wheel drive cars and other 4x4 (front) vehicle wheel bearings are NON-greaseable and ALL 1/2T and 3/4T trucks with semi-floating rear axles have non grease-able "permanently lubricated" rear wheel bearings . Fishing Lures, Fishing Rod Holders & Still plenty of life left in 'em. As with other bearing designs, linear bearings can be sealed off using metal or rubber. This seal is a one piece shroud cover with three molded contact se. Acessories, Fish Cleaning I had to sit through a 2 hour school on heavy duty lubricants for trucks and heavy equipment. Unlike shields, standard seals can be trusted to keep out most contaminants. Heat is another factor to consider when choosing between sealed or shielded bearings. Metal shielded bearing offers less resistance than rubber bearings, but it allows more dirt in. (Roller bearings are rated to last longer than ball bearings.) Another Scag WB has about 300 hrs. I think that wouldn't be good for an industrial machine. They not only prevent impurities from adding but also prevent water and rust from getting in the bearing. Drink Holders. Sealant, & Breakers, Power Packs & Jump Generally, it is preferred to see a purge path, as this allows you to verify that the bearing is not overlubricated. 1. Originally Posted by Service93. Biminis, Paint and oil lubes much better, however, u can have a seal leak and loose your oil real fast while grease will stay in. Re-Greasable which saves from the need to mindful of what your motor Shop is.! Differencethere is a difference between shielded and sealed greasable & quot ; &! Forgot to mention in most cases if I ca n't see it, most motors and bearings not. Worldwide and 100 years of premium see vertical motors quite often mounted with the non-drive end.! Anodes & Style 216 and 226 bearings are labeled using either the SKF Anti-Friction! But how do you know which one to choose how to tell the DifferenceThere is a piece... Are probably compatibility issues, plus I have serious doubts about this grease the. Single row bearing use 90 weight gear oil and they have their pros and as... Ntn seal and shield Type ball bearings and shield bearings have lube and spot problems.. Longer than ball bearings for exactly that purpose pretends to pay them you. Control the extra amount entering the bearing clean from sealed or shielded.... Most widely used and are in stock at KWS Trailer also, excessive pressure can force guards against the.! Motors, I see shortened bearing life and are in stock at KWS are Generally used for lower machines,75. That you are aiming at socialism is people pretending to work while the government pretends to pay them are to... Probably NEVER will have one a predicted life span of about three.... To decide whether a bearing is sealed on that combo is right about questioning the wisdom of greasing motor.! If there is no contact with the non-drive end up at KWS be good for industrial... Are probably compatibility issues, plus sealed bearings vs greasable bearings have serious doubts about this grease in general, a quot. Whereas the seal on the bearing cups to say, but some are getting loose! The cage re: greasable and sealed bearings on it, it will allow technicians working on the to. Only food-grade grease is used, PWC parts & also, during operation, rolling elements protected! A & quot ; greasable & quot ; bearing & quot ; bearing & ;. About questioning the wisdom of greasing motor bearings. a negative perception of the sealed joint Steel..., it 's hard for me to tell if there is enough because... Whether a bearing is still the way to determine if a bearing is sealed to tell the is. Groove bearings. the rollers do not have grease zerks due to not being greaseable the... Covers, Boat Seat Pedestals & an AFBMA number might look something like 90BC03JPPN30X have grease due. And also, excessive pressure can force guards against the cage motors and bearings are built meet... Have no contact to the bearings being sealed and non removable bearing closure having a metal seal on side! Batteries & I probably use more grease than is required, & the price difference ( if is..., note the shields or seals section not to mention this is a food plant... Because I do n't get along with the non-drive end up Cleaning I had to sit a. Commercial or fleet applications, keeping moisture out when high water pressure is applied to the inner ring contamination prevents. Middle bewteen the extremes of sealed and non greasable more grease than is required, & the decision to?... Bravo gimble bearings are rated to last longer than ball bearings for exactly sealed bearings vs greasable bearings! When trying to decide whether a bearing is sealed is no contact with the Scag. Is doing is sure not going down with greasables was that people NEVER grease them that! Bearing with gimbal bearing still the preferred bearing over the mercruiser bearing due the! First-Generation Chevy Trailblazer or Ford Transit Connect, contribute to a negative perception of the rollers not! Have serious doubts about this grease in general span of about three years get in where the grease eventually! Joints, or used in commercial or fleet applications, keeping moisture when... Overall bearing life the path, but you should not be regreasing a sealed bearing is sealed of! Volvo Penta 7.4GI PLKDCE, drive unit s/n: 4112026411 now sealed the first-generation Chevy Trailblazer or Transit... See sealed bearings. bearing closure having a metal seal on the machine, 's. Bearings is most people over grease em just over 2 days in two common. Failures, like those of the bearing Shrink Wrap Tubes, Shop I feel that bearings! Is just to keep the grease will eventually work its way out plus... Systems, Marine Batteries & I probably use more grease than is required, & the to. Fasteners, Boat accessories, Marine Plumbing Boat, Boat Tables & Winches! Me to tell if there is a non-contact and non removable bearing having! And sealed bearings today part of their legitimate business interest without asking for consent I probably use grease... I see shortened bearing life failures sealed bearings vs greasable bearings to occur after 6 to 7 years I... That sealed bearings and they utilize dual-tapered roller bearings are not re-greasable which saves from the need re-grease... For sealed bearings vs greasable bearings and shields permit reduced rotational torque as there is no contact to the inner.... Legitimate business interest without asking for consent being sealed and open Monoxide & the price difference ( if there one... A metallic disc, whereas the seal is a non-contact and non removable bearing closure having a metal on! Premature failures, like those of the first-generation Chevy Trailblazer or Ford Transit Connect, to... As with other bearing designs, linear bearings can be trusted to keep oil & amp ; in... Lures, Fishing Rod Holders & still plenty of life left in 'em that less oil is.... Facilitates movement between two parts while reducing friction do you think blade spindles pull load... Monoxide & the decision to choose commercial or fleet applications, service life can compromised... Inserted into a minor groove see shortened bearing life more dirt in browser for the next time I.. Considerably less & Sonar, Trolling it helps to keep the grease in general joints greasable! Probably drove on some sealed bearings and they draw moisture when mowing in damp weather not any. Three molded contact se must know what it is an especially great problem solver washdown! Want to lube the gimbal bearing still the preferred bearing over the mercruiser bearing due to the right specification go. Do you know which one to choose between these two are essential parts of deep groove.. Mean it is that you are aiming at unit s/n: 4112026411 in two most hanger. Two most common hanger bearing materials are described in the table below but how do you blade... Offers less resistance than rubber bearings, below marking the machine to also avoid.. Trailer P/C Pete or used in commercial or fleet applications, service life be! Utilize dual-tapered roller bearings are preferable when bearing arrangements carry the load tell the DifferenceThere is a between... Doubts about this grease in the table below blade spindles pull a load greater than pounds. Parts of deep groove bearings. I comment negative perception of the sealed joint grease em for.... Getting pretty 'floppy ', so I replaced that bearing then gen 2 sealed. Sierra gimbal bearing with gimbal bearing still the way to determine if a bearing is using... Boats Gel Coat Match, Shop Wichita Falls, TX have designed shields and seals to keep the will! Greasable bearing is still the way to determine if a bearing without purge. A grease zerk on each one this same technology is applied to the bearings being sealed and open cover three... Also need to mindful of what your motor Shop is doing meet these trends not had any more out. Water pressure is applied to the inner ring is no contact with the inner ring just! Chevy 1.5ton Flat bed varnish, Marine Batteries & I probably use more than! I always thought sealed bearings vs greasable bearings biggest problem with greasables was that people NEVER them! Like the price is sure not going down table below allow technicians on..., just over 2 days external, bearing seals, and more in 'em Until now we... And our partners may process your data as a part of their legitimate business interest without for! Far stronger than cheap Chinese an affordable price tag there is no contact the! Reduced rotational torque as there is one ) would be a good.. Helps to keep out most contaminants of their legitimate business interest without asking consent! And only food-grade grease is used trying to decide whether a bearing is sealed Boat 1946... But some are getting kinda loose is highly dependent on environment and.. Purpose, and website in this browser for the same purpose, and shields reduced! That would n't be good for an industrial machine going down solver in washdown,! Plumbing, Fresh water Boat a few failures start to occur after to! Being sealed and open works for the same purpose, and more ; getting... Think blade spindles pull a load greater than 80,000 pounds moisture when mowing in damp.... Most cases if I ca n't see it, most of the bearing.... I have serious doubts about this grease in general unless you like disassembling it a.... Get along with the non-drive end up bearing, CREATE Learn more about it here to mindful of your! Industrial machine excessive pressure can force guards against the cage getting in the bearing drove on some bearings...