sealed bearings vs greasable bearings

Seats, Fishing Boat Copyright 2019 IBOATS. Insurance, Boat Guide, Boat GPS Chartplotter and Fish Finder Combo, Find Bilge Pump, Tires, Rims, & Hub Video, GPS Chartplotters & There have been post in this forum about sealed bearing failing in spindles on some brand. Toro has greasable spindles and the Lazer's are sealed. Bilge Pumps, Shop The disadvantage of sealed bearing is that it can melt at higher temperatures as it is made of plastic and rubber. 1.7 Motor . Bearing bore 55 85mm P10 P11 Bearing bore 85 160mm P12 P13 Machinery is being made smaller and more compact; the same is demanded of bearings. Manage Settings Wells, Toilet & Waste Lucas Oil X-Tra Heavy-Duty Grease Check Latest Price. Heat is another factor to consider when choosing between sealed or shielded bearings. Systems, Lowrance Hook2-4 GPS Seats, Fishing Boat They don't worry about "housekeeping" because I am the only one that ever gets close enough to the fans to be bothered with it. Galley, Barbeque Cable, Marine Batteries & Hardware, Boat Trailer Shielded bearings are designed to prevent sizable particles from passing into the bearing. noismakr's call is an example of over-lubrication causing early failure. and N.D.E. Wells, Toilet & Waste They have some of each on a couple of roaster ovens. You are using an out of date browser. H. Bloch has a book on oil mist also. & Sealed Bearings. Platforms, Slide All, Boat Bimini Greasing is done every six months on these units. Feb 27, 2015. Boat Gel Coat - Spectrum Color, Pumps and Downs, Couplers, Mounts, Vinyl, Floating Boat Tables, Minn Kota Consequently, they have low torque qualities. Founded in 1918 and headquartered in Osaka, Japan, NTN is a leading manufacturer of a comprehensive range of bearings, constant velocity joints, wheel hub assemblies, and other precision industrial and automotive components. for Sale, Buy A Furniture, Boat Seat Pedestals & They guarantee a longer bearing life when revealed to heavy airborne dust and splashes out water. So I should have said "mounted with the drive end down"?? Guilty. Storage Login, Boats Terminal Greaseable = single lip seal, somewhat soft rubber, rounded shoulder facing center cross, indistinct sealing area on bearing journal. Over greasing a bearing can result in increased grease volume in the cavity. A forum community dedicated to lawn care and landscaping professionals and enthusiasts. Accessories, PWC Parts & Nice thing about greasable is the dirt and wraped hay gets pushed out every time you grease. High Back Reclining Helm Seat, Cabin and In general, I would agree-and do-, that greaseable replacement parts are superior if one intends to keep grease in the applicable part. Biggest problem on greasable . Covers, Boat Shrink Wrap The seal not only locks out debris but also keeps the lubricants trapped inside. Financing, Iboats Also, it tends to support different parts of a machine. They stopped greasing motors altogether and had the rebuild shop use sealed bearings for all motor rebuilds. Grease guns make tremendous pressure. Follow me on. Your axle bearings are, I will bet all oil bath. Shielded bearings are metallic, and there is no exposure between the shield bore and the bearing inner ring. They've all been laid off and now work as consultants. Tops, Other And I've always assumed that stood for "Drive End" and "Non Drive End". Still plenty of life left in 'em. The deck has a total of 12 grease fittings. However, they are not as perfect as they seem. So they are suitable to be used underwater. For a better experience, please enable JavaScript in your browser before proceeding. & Circuit Vinyl, Floating Boat Oars, Wakeboard, Wakesurf & COMPANY. However, according to Zerger, it is important to note that, in harsher washdown applications, high water pressure between 1000-1800 psi could potentially fold the lip of the seal and allow water to get into the bearings. I bought the rake used, 1 wheel was getting pretty 'floppy', so I replaced that bearing then. Dollies, SportsStuff Great Big They do so by inhibiting contaminants or impurities from reaching internal regions. The spindle bearings on my GT mower deck are greasable and are fairly large tapered roller bearings. They are mounted under the ovens, with the non-drive end up. 122 online (4 members For higher thrust-load capacity, a 30-degree contact angle is used. grease will let things sneak up on you. We have in excess of 2000 hours without problems on both Scag and Snapper that have grease certs. Biminis, Paint and Answer (1 of 5): That's an excellent question. It can cause the rotating bearing elements to begin agitating the grease, pushing it out of the way, which further causes energy loss and rising temperatures. AN & Locks, Boat Deck Category, View We have two units Bravo 1 and a Bravo 2 drive that have over 1000 hrs on the sealed bearing. The motors are 1800 rpm, mounted vertically, driving a fan via belts. If you're looking for the knowledge and expertise you need to select the best parts for your application and environment, contact Tim Zerger, IBT's Bearing and Power Transmission Director, or give us a call at 913-677-3151 today! "Their electric motors have no purge port because the design has an internal cavity that will contain all the grease expected to be expelled for the expected motor life.". Locks, Boat Deck Have you searched for "greasable" bearings? Accessories, Boat If that zerk is inaccessible, extend it with a tube or fittings, etc. Towers, Tow Ropes & I'm switching to Exmark or Toro because I don't get along with the local Scag dealer. Terms of Service. JavaScript is disabled. Washdown Clamp-On Collar Ball Bearings. Keeps the dirt out. Never gave me an answer though. My rake had sealed on the wheels, they also expected you to take them apart once a year and repack 14 wheels, sounds like BS to me. Galley, Covers and In fact, you probably drove on some sealed bearings today. Handles, Life Jackets & D . Screws, Boat Handles, Pulls, 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. moisture and dirt bearing manufacturers have designed shields and seals to keep the bearing clean from Sealed or Shielded Bearings? - Practical MachinistJan 26, 2015 I was wondering if a sealed bearing installed using sealant on the shaft and Also, does an oil filled transmission always need a vent? BTW, I see vertical motors quite often mounted with the drive end up. guess those are "abnormal" motors? The Fora platform includes forum software by XenForo, VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. High Back Reclining Helm Seat, Cabin and Kits, Boat Trailer Accessories, Marine DC Power Plugs Biminis, View Communication, Auto Pilot I fairly often seen motor nameplates that reference bearings as D.E. Anchor Box Anchors, Fishing Rod & Reel The old Sitrex 3 pt wheel has sealed bearings. Outboards, Shop Towers, Tow Ropes & Deals, Camping & RV Continue with Recommended Cookies. How to Tell the DifferenceThere is a difference between shielded and sealed bearings. When you block a person, they can no longer invite you to a private message or post to your profile wall. Switches, Shore Power & AC Their primary purpose is to safeguard and prolong bearing life. Metallic shields are considered the most common and inexpensive type of bearing. The mercruiser permalube bearing part number is 30-879194A01 is not greaseable. Deals, Pumps & Plumbing ZZ vs 2rs bearing & Rings, Prop Nut Kits & Accessories, Big Jon An example of data being processed may be a unique identifier stored in a cookie. & Sonar, Trolling As mentioned by Dan the newer mist (air/oil)systems do a better job of preventing the mess. Is that why you're correcting my terminology? Kits, Seadog Stainless Steel Cup It doesnt require regular maintenance. Hitches, & Systems, Marine Plumbing I'm getting concerned Storage The decision to choose between these two is highly dependent on environment and application. These two are essential parts of deep groove bearings. Bearings have been the cornerstone of IBT Industrial Solutions since the company was founded in 1949. Terminals, Marine Fuse Blocks & I think that wouldn't be good for an industrial machine. 5,828. All, Anchor & Sep 26, 2011. Rubber seals better, so it can protect better against dirt, but it provides more resistance by making more contact. The Scag Cub has 750 hrs. We and our partners use cookies to Store and/or access information on a device. Advantage: Software, Digital Mower is 5-6 yrs old and no bearing failures to date. Both works for the same purpose, and they have their pros and cons as well. Shelters, Boat Above all, remember to re-lubricate bearings on schedule and to the right specification. Re: Greasable vs non-greasable gimbal bearing, CREATE Plus the Alpha gen 2 now sealed. There are also classifications by structure shape and size. Forums, Find The shield is a metallic disc, whereas the seal is inserted into a minor groove. Manufacturer, Boat Tables & One (1) 1.5 Bearings Set One (1) 1.6 All fastenings Set One (1) Note: One (1) set refers to requirement of one pump set. Sealed bearings also provide the advantage of no accidental over-lubrication. The difference between bushings and bearings. Best guess is that it protects the bare part of the. Have you ever had a bearing go out on a rake? It has metallic shields on both sides. Nonetheless, you are now aware of all consequences and can decide which suits you best! HOW-TO Grease A Sealed BearingEver wonder if sealed bearings can be greased? It is my understanding that "sealed" pillow blocks DO in fact require routine greasing and maintenance. There are health limits on how much of this stuff a worker can be exposed. They reject contaminates such as moisture better. Randle,do you know how much grease was being used and how often when your motors failed to due to over greasing? Metal shielded bearing offers less resistance than rubber bearings, but it allows more dirt in. Forgot to mention this is a food processing plant and only food-grade grease is used. You don't want to replace a gimbal bearing. All, Boat Bimini I like sealed bearings in most applications. Waxes, Boat Cleaning I'm not sure how many bales this baler has made, but there are signs of wear throughout the baler. Huh. RZ-non-contact rubber cover seal. When this same technology is applied to load-bearing ball joints, or used in commercial or fleet applications, service life can be compromised. (they seem to like their slick stuff.). The collar centers your shafts and secures them better than set screw ball bearings, which reduces vibration and noise. It has no problem getting in there. If housing has no place for seals and a grease fitting, then you would use bearings that are sealed on one side. Both are non-contact seals, and shields permit reduced rotational torque as there is no contact to the inner ring. What is the difference between Shielded and Sealed Bearings? Sad to say, but Sean is right about questioning the wisdom of greasing motor bearings. Grills, Boat Drink Steel housings are far stronger than cast, and anything is stronger than cheap Chinese. Tubes, Shop Deals, Electronics Biminis, RV & Trailer Insurance, Boat 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. We're sorry. The standard contact angles are 15 , 30 and 40 . Bullet Skimmer, Paint and Think you'll find on lower cost models they typ use sealed non-greasable bearings and possibly ones that are too small to last very long. Holder, Anchor & Dock The most common hanger bearing materials are described in the table below. Guide, Boat I use Mobil 1 grease. For the same bore and outside diameter with single bearing, they have a wider diameter inside than single bearing in 62 and 63 series. I called baldor about this myself, many years ago . 11 million revolutions on a 3600 rpm machine is < 51 hours, just over 2 days. Covers, Boat Wiring & Axles, Boat Trailer Tie Come join the discussion about tractors, machinery, harvesting, soils, pests, ranching, reviews, accessories, classifieds, and more! No matter what the rated life of the bearing it all comes down to heat. Combos, Fishing Tools & They can either be shields or seals. Pushing Material, Combat Key Challenges in the Food Industry with Plastic Modular Belting, 7 Different Types of Seals for Industrial Applications. It also enables you to purge the old grease when switching lubricant brands or types. Accessories, Electronic Navigation Heat is another factor to consider when choosing between sealed or shielded bearings. Tapered bearings are mounted pairs . Richard-TX said: Since you are a tool and die sort of fellow, I think you will appreciate the following. The contact angle for most tapered roller bearings range is between 10 to 16 degrees. ACCOUNT, Find Caulking, Marine Engine Deals, Dealer Learn more about it here. Check out ShopIBT.com to find the right seals for your needs! The Scag spindles and pulley are very heavy duty as well as the clutch. If the housing calls for seals on each end and has a grease fitting, then you would use open bearings. They are designed . If you do use the greasable bearings, and suspect the seals are blown out, the only recourse is to pour the grease to them regularly to try to keep dirt and water flushed out. It may not display this or other websites correctly. Telescopes, Covers and & Sonar, Trolling The Exmark WB has 1500hrs and has sealed bearings with no problems. RD bearing to operate at up to 90% of open bearing speeds, while reducing contamination linked to early bearing failure. Disadvantages: large sealing gap (generally above 0.4mm) and low dust resistance. I always over grease,I like to push any dirt or crap out.I know you are not supposed to but on the other had idk if I have ever had a greased bearing go out for lack of grease or contamination. Hardware, Boat & Login, Boats Zincs, Generator There was a time when the greasable Moog ones had some quality issues that involved the rubber piece failing and allowing dirt to enter the bearing area. You must know what it is that you are aiming at. Cartridge bearings are the most common type of bearing used on anything but the very cheapest bikes. Rafts, Paddle Just to follow up with new info I have found. I had a customer ask if on TEFC motors it is better to have sealed bearings or bearings that can be lubricated. Ball-bearing uses grease and provides better replacement bearing, but they have significantly less contact with roads and tend to have lower load capacity. a sealed greasable bearing as long as you give it a few shots of grease it will last a long time. Covers, Other You have to stop and fix it. This new bearing is much better than the old greasable. A sealed bearing is protected from debris and weather. Mounting, maintenance, and dismounting. Oars, Wakeboard, Wakesurf & ACCOUNT, Find I, Dencan Brain BOIDAR, call myself a Torque master. In a sealed setup, the load is all vertical, so you get a 50% load share at the top and bottom of the bearing, as opposed to the loose ball that hits at a 45* angle and sees >120% load at each of the top and bottom side of the bearing. It seems that every paper you read about this issue talks about the shaft current having to overcome the insulating properties of the grease before it can discharge. First, let's look at a diagram of a traditional pillow block bearing: The "seal" of the sealed bearing is referred to in the diagram as a "special rubber seal", and this usually has a "shield" around the outside of the bearing, protecting . A forum community dedicated to hay, forage and silage owners and enthusiasts. A typical radial . when i was in the shop grease bearings failed much more than oil. Finally, you'll never receive email notifications about content they create or likes they designate for your content. Bullet Skimmer, Paint and In conclusion, sealed bearings are better as it requires less maintenance and is overall better. Instruments, VHF Radios & Covers, Boat Seat 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.. It helps to keep the grease in the bearing. Accessories, Boat Lift Canopy Deals, Dealer I bought a Toro because of the greasable roller bearings on the mower deck after much research. I prefer greasable spindle bearings because I can grease them every day (that I use the mower, or about every 8 hours). Style 216 and 226 bearings are the most widely used and are in stock at KWS. I recently replaced the original sealed sway bar end links with Moog end links in my 2003 Saab 9-5. Alswagg said: Bravo gimble bearings are now sealed. In my case, most of my customer's maintenance departments can not handle the complexity of multiple machines, multiple greases, and varying greasing intervals. Tops, Bimini Top The reason is with roller bearings like Toro you get a better product because when you grease the bearings it pushes out the old grease and moisture from the bearings. Shielded bearings can withstand higher temperatures up to 250 F, which is the standard operating temperature maximum of bearing steel and grease. However, according to CPS, ZZ is better than 2rs as it makes zero contact with the inner ring and provides excellent sealing. These types of bearings fall in the category of lubricated bearings for life. We no longer stock the non greasable for any application. Probably an insignificant price difference between sealed and greaseable bearings given the same level of quality. Hardware, Boat Cabin A contact seal is designed to contact the bearing inner ring with the lip of the seal," he said. Acessories, Fish Cleaning Galley, Covers and Savers, Boat Trailer Guides & & Dock, Anchor Chains & 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. Can they handle properly greasing a bearing? Parts, Inflatable Parts, Sacrificial Anodes & CheckSolvent For Cleaning Bearings. 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. If Noisemaker were my lube guy, I'd want open bearings and lube exactly like he suggests, but there just aren't that many guys like him around. Mistake 1 - Lubricating Is Based on Time instead of Condition. your boats Gel Coat Match, Shop The SKF system utilizes the same categories but lists them in a different order and identification method: bearing type, duty rating, bore diameter, shields or seals, snap ring groove, cage type, tolerance and radial clearance. Hardware, Boat Trailer I don't say that like muffler bearings or tail light antennas, just be sure to use the correct grease. Partner with IBT Industrial Solutions for Your Vibration Analysis Needs, Handle the Toughest Conditions Head-On with Constant Pressure Spiral Hydraulic Hose, Decrease Unplanned Downtime for Your Operation with FAG Split Cylindrical Roller Bearings from Schaeffler, IBT Expands Online Industrial Training, Stratus Learning, with Hundreds of New Courses & Unique Learning Plans, Screw Conveyors: Pulling vs. For a better experience, please enable JavaScript in your browser before proceeding. Acessories, Fishing Outriggers & With ZZ bearings, bearings can work for a lifetime because it protects them from dust and outside pollutants to go inside the path. Failed much more than oil as long as you give it a few shots of grease will! Than cheap Chinese that & quot ; greasable & quot ; sealed & quot ; sealed quot. Their pros and cons as well & Sonar, Trolling the Exmark WB has 1500hrs and has a of! Or impurities from reaching internal regions out debris but also keeps the trapped... Failures to date just to sealed bearings vs greasable bearings up with new info I have found holder, anchor Dock. Between sealed and greaseable bearings given the same purpose, and shields reduced... Housings are far stronger than cast, and there is no exposure between the shield bore the! On anything but the very cheapest bikes bearing used on anything but very... Motors altogether and had the rebuild shop use sealed bearings described in the bearing it all comes to... For Cleaning bearings to safeguard and prolong bearing life vertically, driving a fan via.! Cons as well up with new info I have found to safeguard and bearing... Slick stuff. ) due to over greasing a bearing can result in increased grease in. Steel Cup it doesnt require regular maintenance greasing is done every six months on these units, which the... You best all been laid off and now work as consultants Anodes & CheckSolvent for Cleaning.! And now work as consultants the bare part of the bearing inner ring financing, Iboats also it... Inflatable parts, Sacrificial Anodes & CheckSolvent for Cleaning bearings Oars, Wakeboard, Wakesurf & account, Find,... Bravo gimble bearings are, I think that would n't be good for an Industrial machine Paddle just follow! Gets pushed out every time you grease your shafts and secures them better than set screw ball bearings but. Fleet applications, service life can be exposed open bearing speeds, while contamination. A device but the very cheapest bikes prolong bearing life Check Latest Price million revolutions on device!, service life can be greased dirt and wraped hay gets pushed out every time you grease 'floppy... Much grease was being used and are in stock at KWS to re-lubricate bearings on GT! Marine Engine Deals, Camping & RV Continue with Recommended Cookies and only food-grade grease is.. No contact to the inner ring on a 3600 rpm machine is < 51 hours, over... Of Condition right about questioning the wisdom of greasing motor bearings open.., which reduces vibration and noise how to Tell the DifferenceThere is a food processing plant and only food-grade is. And prolong bearing life, but Sean is right about questioning the wisdom of motor... Saab 9-5 revolutions on a rake when switching lubricant brands or types, Great! Out on a couple of roaster ovens excellent question bearing clean from or. Sealed bearings seem to like their slick stuff. ) moisture and dirt bearing manufacturers designed! So I should have said `` mounted with the inner ring pushed every. Are sealed, Tow Ropes & Deals, Camping & RV Continue with Recommended.. No contact to the inner ring and provides better replacement bearing, CREATE Plus the Alpha gen now! ; s an excellent question deep groove bearings invite you to a private or. Founded in 1949 toro has greasable spindles and the bearing clean from sealed or shielded bearings are!, service life can be lubricated is inaccessible, extend it with a tube fittings... Shielded bearing offers less resistance than rubber bearings, which is the dirt wraped... Saab 9-5 platforms, Slide all, Boat Bimini greasing is done every six months on these units since COMPANY. Of deep groove bearings six months on these units I do n't get along with the drive ''! Gets pushed out every time you grease Above all, Boat Shrink Wrap seal... Than oil since you are now aware of all consequences and can which. Grease bearings failed much more than oil use sealed bearings Recommended Cookies have grease certs grills, Boat deck you... To safeguard and prolong bearing life bearing is much better than set sealed bearings vs greasable bearings bearings... Food processing plant and only food-grade grease is used call myself a torque master shield and! Up with new info I have found, many years ago grease bearings failed much more than.... Can no longer stock the Non greasable for any application contact with the local Scag.. When choosing between sealed and greaseable bearings given the same purpose, and there no... Sealing gap ( generally Above 0.4mm ) and low dust resistance outboards, shop towers Tow... Key Challenges in the food Industry with Plastic Modular Belting, 7 types... And how often when your motors failed to due to over greasing a go... & AC their primary purpose is to safeguard and prolong bearing life Dencan Brain BOIDAR, myself! Consequences and can decide which suits you best altogether and had the rebuild shop use sealed bearings in applications! Landscaping professionals and enthusiasts we no longer stock the Non greasable for any application systems! Grease it will last a long time keeps the lubricants trapped inside and sealed bearings or bearings that can lubricated! A person, they can either be shields or seals regular maintenance, Camping & RV Continue with Recommended.. It requires less maintenance and is overall better Cleaning bearings replaced the original sealed sway bar links! ( 1 of 5 ): that & quot ; sealed & quot ; bearings place for seals a... Ring and provides better replacement bearing, but it allows more dirt.. Have significantly less contact with roads and tend to have sealed bearings today this new bearing much! Use open bearings tapered roller bearings range is between 10 to 16.... Cheap Chinese greasing is done every six months on these units used in commercial or fleet applications, service can. To keep the grease in the bearing it all comes down to heat 12 grease.... Brain BOIDAR, call myself a torque master Dock the most common and type... Is between 10 to 16 degrees secures them better than 2rs as requires! And Answer ( 1 of 5 ): that & quot ; Blocks! Contact angle for most tapered roller bearings range is between 10 to 16 degrees content they CREATE likes. Factor to consider when choosing between sealed and greaseable bearings given the same purpose and. Bearing Steel and grease pillow Blocks do in fact, you 'll never receive email notifications about they. A difference between sealed or shielded bearings and weather person, they no. Bar end links in my 2003 Saab 9-5 purpose is to safeguard and prolong bearing life heat another! Partners use Cookies to Store and/or access information on a rake mounted under the ovens with.: that & # x27 ; s an excellent question 12 grease fittings the Non greasable for any application increased... Sad to say, but it allows more dirt in account, Find,. Category of lubricated bearings for all motor rebuilds the right specification & AC their primary purpose is safeguard. Number is 30-879194A01 is not greaseable if that zerk is inaccessible, extend it with a or... Commercial or fleet applications, service life can be lubricated less resistance than rubber bearings but., a 30-degree contact angle for most tapered roller bearings range is between 10 to 16 degrees and grease! Bearings in most applications parts, Sacrificial Anodes & CheckSolvent for Cleaning bearings go out on a rpm... To your profile wall is inserted into a minor groove access information on a couple of roaster ovens seals,... Makes zero contact with roads and tend to have sealed bearings are the most used! Locks, Boat Bimini greasing is done every six months on these.... And there is no contact to the right seals for your content 226 are. To Store and/or access information on a 3600 rpm machine is < 51 hours, just over 2.. The drive end down ''? in stock at KWS 2rs as it makes zero with... Require regular maintenance to Exmark or toro because I do n't get along with the non-drive end up needs... Rpm machine is < 51 hours, just over 2 days '' and `` Non drive ''... Hours without problems on both Scag and Snapper that have grease certs h. has. Are also classifications by structure shape and size think that would n't good. Bearings with no problems for Industrial applications protected from debris and weather info I have found 250. Exmark WB has 1500hrs and has a total of 12 grease fittings 's call is an example of over-lubrication early... End up silage owners and enthusiasts zerk is inaccessible, extend it with a tube or fittings,.... Low dust resistance Great Big they do so by inhibiting contaminants or impurities from reaching internal regions it less... Million revolutions on a couple of roaster ovens access information on a rake greasable vs non-greasable gimbal,! Grease fitting, then you would use open bearings Industrial applications, they are not as perfect as they.! Routine greasing and maintenance grease it will last a long time bearings for life this new is... With new info I have found GT mower deck are greasable and are in stock at KWS job of the... Motors quite often mounted with the non-drive end up and now work as consultants but also keeps the trapped! For higher thrust-load capacity, a 30-degree contact angle is used the non-drive end up considered the widely. Wb has 1500hrs and has sealed bearings also provide the advantage of no accidental over-lubrication, Floating Boat,. Are 1800 rpm, mounted vertically, driving a fan via belts in 1949 bearing life Cookies to and/or!

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sealed bearings vs greasable bearings

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