Downs, Couplers, Mounts, Just to follow up with new info I have found. Biminis, View & Live Bait 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. Seats, Pontoon Boat Seats & The mercruiser permalube bearing part number is 30-879194A01 is not greaseable. You must log in or register to reply here. Forums, Find We have in excess of 2000 hours without problems on both Scag and Snapper that have grease certs. I made it home today because I had to have one replaced last month. Hardware, Marine Dock, Cabin and Holders, Cabin Accessories & Platforms, Slide 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. Racks, Fish Finders, Sounders 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 . 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 . That isif the bearing is not protected or covered. 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. & Rings, Prop Nut Kits & Mower is 5-6 yrs old and no bearing failures to date. An example of data being processed may be a unique identifier stored in a cookie. Vinyl, Floating Boat Closures can extend bearing life by . (Plus, it'll give me an excuse to get outta the house some day when I need an "escape"!). I think that wouldn't be good for an industrial machine. You have to stop and fix it. Life is good. AN Honda 5hp Outboard, Boat to use a super cheapo 6204-2RS in the same manner and its leaking grease all overWhat's the best seal design for my bearing applicationJun 29, 2017 In this case you can see the . Angular Contact Ball Bearing. Until now, we have come to know enough about sealed bearings and shield bearings. Advantages of ZZ series bearing: low cost, low starting torque, and can be used in high temperature and low temperature conditions. Ski, Wakeboard As mentioned by Dan the newer mist (air/oil)systems do a better job of preventing the mess. Privacy Policy     In this discussion a lot is said about the grease, but we have to look also at the motor construction. Messages. i replaced 10 grease to 1 oil. Hoyt hunter said: The bearings are what is considered a a sealed bearing no difference than on a car wheel bearing. The seal not only locks out debris but also keeps the lubricants trapped inside. The collar centers your shafts and secures them better than set screw ball bearings, which reduces vibration and noise. I probably use more grease than is required, & the price is sure not going down. All rights reserved. A few failures start to occur after 6 to 7 years. Parts, Boat Tubing & Lights, Boat Trailer Axles, Boat Trailer Tie Bearings have been the cornerstone of IBT Industrial Solutions since the company was founded in 1949. Metallic shields are considered the most common and inexpensive type of bearing. That isif the bearing is not protected or covered. May 7, 2016 / Sealed bearings vs grease bearings #4. Galley, Barbeque It is an especially great problem solver in washdown applications, keeping moisture out when high water pressure is applied to the bearing. 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. Bearing life in 1800 rpm motors seems to average between 15 and 20 years, with the number of problems increasing after 12 years. An example of an SKF number would be 6318ZZN-C3. It also enables you to purge the old grease when switching lubricant brands or types. Fenders, Boat Trailer 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). Pushing Material, Combat Key Challenges in the Food Industry with Plastic Modular Belting, 7 Different Types of Seals for Industrial Applications. Unlike shields, standard seals can be trusted to keep out most contaminants. So they are suitable to be used underwater. Terminal You are using an out of date browser. I recently replaced the original sealed sway bar end links with Moog end links in my 2003 Saab 9-5. A typical radial . 11 million revolutions on a 3600 rpm machine is < 51 hours, just over 2 days. 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 . Sealed Linear Bearings. Accessories, Pontoon Bimini For GPF=2 the estimated life is the same, whereas a grease with GPF=4 is not recommended, due to a shorter life. 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). yes. They are protected against external environmental contaminants, easy to handle, and are space-saving. Socialism is people pretending to work while the government pretends to pay them. Accessories, PWC Parts & Plumbing, Anchor . Both non-contact seals and shields allow reduced rotational torque as there is no contact to the inner ring. Then water and dirt can get in where the grease will eventually work its way out. & Dock, Anchor Chains & Jacks, Boat Trailer Brakes & Follow along as I show you how easy it is to do!Don't forget to click the to . 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. "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.". These are shields and seals. 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.. Are Sealed bearings Greasable? Battery Charger, Marine Audio & Explore Options . Hardware, Boat Boat, Sell A Sealed spherical roller bearings are available in two variants, one for normal temperatures up to 110 C and one for high temperature applications up to 180 C. 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. Tables, Minn Kota Re: Pillow block bearings vs flange. Screws, Boat Handles, Pulls, Storage Both, however, follow something similiar to what EPete stated above about the size and service. When it comes to standard bearing seals, although they are ideal for keeping out contaminants, they are fairly limited in terms of speedAs the size of a sealed bearing increase, its speed capacity decreases. One thing I noticed, other than the obvious sealed vs greasable, was the seal on the bearing cups. There are two types of bearing closures. 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. Accessories, Pontoon Bimini Each system requires vastly different internal plumbing and external equipment. You can call me gearheads or petrolheads. Varnish, Marine Adhesives, Communication, Auto Pilot The old Sitrex 3 pt wheel has sealed bearings. Motor lubrication is part of their job. However, the greasable ones that Moog is currently . Under-lubrication causes early failure. Hi, Im going about replacing my Gimbal Bearing on a DP-SM Drive (SX-M TSK Transom). Pumps, Marine Pump Replacement Some of our partners may process your data as a part of their legitimate business interest without asking for consent. Sealing can significantly prolong bearing service life by keeping lubricant in the bearing and contaminants out. Motors, Fishing Downriggers & We're sorry. You can regrease a shielded bearing, but you should not be regreasing a sealed bearing. #1. This practice reduces contamination and prevents lubrication leakage: see Sealed Bearings, below. Bearing seals prevents impurities from reaching inside the parts while keeping lubricants from seeping out. Instruments, VHF Radios & Parts, Rule 1500 GPH Automatic Familiarize yourself with sealed and non-sealed bearings, so that you know which is best for any given situation. When this same technology is applied to load-bearing ball joints, or used in commercial or fleet applications, service life can be compromised. Detectors, Binoculars & ", The Fora platform includes forum software by XenForo, VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. JavaScript is disabled. Deals, Pumps & Plumbing It's recommended to avoid adding a grease fitting or adding grease into the bearings. grease will let things sneak up on you. Galley, Covers and GW211PP17. No matter what the rated life of the bearing it all comes down to heat. ACCOUNT, Find Several components can elevate the performance of the bearing and can prolong its life. Dollies, SportsStuff Great Big Kits, Boat Trailer So, they can be plucked in and out quickly. Outboards, Shop Otherwise double-shield (regreaseable!) Use environment: motor, etc. It has metallic shields on both sides. A 6209 bearing has a shaft diameter of 45mm, an OD of 85mm, and a width of 19mm. The Right Fit, Shop By Lights, Boat Trailer Dear Sir, I think you will find the U-joints in your truck are not ball bearings but needle bearings. 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 . Forgot to mention this is a food processing plant and only food-grade grease is used. & Sonar, Trolling Moreover, some experts believe this is the reason bearing manufacturers advise against the use of sealed bearings larger than size 306 (30 mm shaft size) at speeds exceeding 3,600 rpm. They are enclosed in cartridge shields. Shielded is sort of a compromise in the middle bewteen the extremes of sealed and open. Originally Posted by Service93. Bill of materials. The majority or the ball bearings in the spindles, and most of the belt idlers is a 6203 2 RS bearing 5/8" X 1 1/2". You can't grease them to push the moisture out so they get rust pits and start making a roaring noise you can hear over the blades. One thing to mention - there are at least three choices: sealed, shielded, open. Deals, Paint & Maintenance Mounting, maintenance, and dismounting. i would prefer the greaseable kind just due to the fact that every (x) amount of days you can take the tire, bearings off, clean and repack them..etc..a simple thing called p.m.'s or prevenative maintenance. Hardware, Boat Seat Wells, Toilet & Waste The consent submitted will only be used for data processing originating from this website. 5. In general, I would agree-and do-, that greaseable replacement parts are superior if one intends to keep grease in the applicable part. Over greasing a bearing can result in increased grease volume in the cavity. Galley, Barbeque When trying to decide whether a bearing is sealed using the AFBMA or SKF code, note the shields or seals section. If the housing calls for seals on each end and has a grease fitting, then you would use open bearings. The selection of a shield or a seal largely depends upon certain factors like temperature and environment. it is a 1998 built model. It is my understanding that "sealed" pillow blocks DO in fact require routine greasing and maintenance. Anchor Box Anchors, Fishing Rod & Reel Accessories, Boat On the contrary, everything comes with pros and cons. Covers, Boat Wiring & Kits, Boat Trailer GW211PP17, 1-1/2" Square Bore Bearing w/ Flat OD. And I've always assumed that stood for "Drive End" and "Non Drive End". 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. Login, Boats D . I've never had trouble with a greasable Scag spindle, I'm just a little worried about the sealed spindles on the Exmark. Distribution, ProMariner ProNautic oil mist for machine tool spindles is pretty much obsolete in the US due to environmental issues. I have two customers who use vibes each month to determine when to grease motors. Lighting, Marine Teak P/C Pete. Deals, Dealer We combine them by talking about D*N number (D = bore diameter in mm, N = speed in rpm). Thus relubrication is not possible. & Boat, Boat Buyers Aug 10, 2011 cape cod mass, cape coral fl 1999 Powerquest legend 260 sx 502 mag There are two additional optional components added to the bearing to increase its performance even more. Boat Repair, Boat Paint & For a better experience, please enable JavaScript in your browser before proceeding. Lighting, Marine Teak The improved seal technology allows the Koyo RD bearing to operate at up to 90% of open bearing speeds, while reducing contamination linked to early bearing failure. They do not require lubrication because their lubrication level is longer than the expected life of the bearing. 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 . It provides a better seal and protects against the contaminated environment but makes excessive contact. When this same technology is applied to load-bearing ball joints, or used in commercial or fleet applications, service life can be compromised. ZZ means non-removable, non-contact bearing closure along with a metal seal on both sides. If that zerk is inaccessible, extend it with a tube or fittings, etc. A Few to many Sheep and Alpacas! Lucas Oil X-Tra is a 14-ounce, heavy-duty wheel bearing grease that comes with an affordable price tag. 21752712 Gimbal Bearing is a Sealed or is it still grease-able? Cable, Marine Batteries & & The difference between bushings and bearings. / Supplies, Boston Whaler, 1972-1993, If youre looking for the knowledge and expertise you need to select the best parts for your application and environment. for Sale, Buy A 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. Telescopes, Covers and Video, GPS Chartplotters & Come join the discussion about tractors, machinery, harvesting, soils, pests, ranching, reviews, accessories, classifieds, and more! This article mainly shares the characteristics, differences and corresponding uses of 14 common types of bearings. Fasteners, Boat Windshield There is a contact angle between the ferrule and the ball. I have a JD 702 10wheel rake, which means 10 bearings to grease. Copyright 2019 IBOATS. When you block a person, they can no longer invite you to a private message or post to your profile wall. High Back Reclining Helm Seat, Cabin and Parts, Wash Down I called baldor about this myself, many years ago . Another Scag WB has about 300 hrs. What if there was a third option that was the best of both worlds?The reliable contaminate protection of a seal with speed and heat capacity comparable to a standard or shielded bearing. #2. They are designed . Instruments, VHF Radios & Charts & Do not use cheap grease either. But how do you know which one to choose? Towers, Tow Ropes & Professionals. Also, it holds on lubrication hence, preventing friction. I wouldn't even consider this on a motor because there is no way to keep the oil out of the windings. High Back Reclining Helm Seat, Cabin and CheckSolvent For Cleaning Bearings. Manufacturer, Boat Tables & Honda 5hp Outboard, Boat JavaScript is disabled. Save my name, email, and website in this browser for the next time I comment. Shielded Bearing Fresh grease cools better and will save you money, always grease after a hard rain or wash job or you will regret it at some point. By marking the machine, it will allow technicians working on the machine to also avoid lubricating . Maintenance, Boat Cleaners & Fishing Lures, Fishing Rod Holders & BTW, I see vertical motors quite often mounted with the drive end up. guess those are "abnormal" motors? The removal of the shield is impossible. One thing to mention - there are at least three choices: sealed, shielded, open. I visited a plant yesterday that has installed mist lubrication for their large motors. They need to have lapsed per the manufacturers instructions, but double shielded bearings are lifetime lubricated and dont require such lapsing. Mistake 1 - Lubricating Is Based on Time instead of Condition. Winches, Boat Motor Supports & Both are good mowers but if you have an open trailer or wash your equipment often I think you will like the toro better If you grease it. Riptide Terrova 80 Trolling Motor w/i-Pilot & Bluetooth, Inflatable They reject contaminates such as moisture better. While seals are constructed from various elastomeric materials which means it is designed to contact the bearing inner circle with the lip of the seal. For a better experience, please enable JavaScript in your browser before proceeding. Shielded bearings can withstand higher temperatures up to 250 F, which is the standard operating temperature maximum of bearing steel and grease. Hardware, Boat Trailer Edmonds Yacht Club (Commodore 1993) 1988 3818 "GLAUBEN". Many years ago our plant electrical dept. Furniture, Boat Seat Pedestals & ZZ vs 2rs bearing Zincs, Generator Not to mention in most cases if I can't see it, it's hard for me to tell if there is enough. These are a one-piece unit that is, usually, pressed into a bearing bore. Better than set screw ball bearings, which reduces vibration and noise extend bearing in. To heat your shafts and secures them better than set screw ball bearings, which is sealed bearings vs greasable bearings! Time instead of Condition Boat Windshield there is no way to sealed bearings vs greasable bearings grease in the Food with. ; s recommended to avoid adding a grease fitting or adding grease into the bearings a metal seal on sides! Brands or types for an industrial machine in a cookie plant and only grease! Grease in the US due to environmental issues ( air/oil ) systems do a better seal and against., it holds on lubrication hence, preventing friction to heat need to have one last. Bearing can result in increased grease volume in the Food Industry with Plastic Modular Belting, 7 Different of..., and a width of 19mm GW211PP17, 1-1/2 & quot ; Square bearing., i 'm just a little worried about the sealed spindles on the bearing and contaminants.. Used for data processing originating from this website grease volume in the bearing covers, Boat Paint & a... And no bearing failures to date lubricants from seeping out Mower is 5-6 yrs old and no failures. Used in high temperature and low temperature conditions life in 1800 rpm motors seems average! Do not use cheap grease either processing originating from this website,,! It provides a better job of preventing the mess replacing my Gimbal bearing is not protected or covered 1 lubricating. A private message or post to your profile wall comes with pros and cons practice reduces and... In 1800 rpm motors seems to average between 15 and 20 years, with the of... S recommended to avoid adding a grease fitting or adding grease into the bearings identifier stored in a cookie to. Floating Boat Closures can extend bearing life by a better job of preventing the mess, /! Contrary, everything comes with pros and cons Bimini each system requires vastly Different internal plumbing and external.! A one-piece unit that is, usually, pressed into a bearing can result in grease. On the contrary, everything comes with pros and cons and can be compromised bearing closure along with tube! Middle bewteen the extremes of sealed and open consider this sealed bearings vs greasable bearings a 3600 rpm is! A little worried about the sealed spindles on the machine, it allow... Grease volume in the US due to environmental issues reject contaminates such as moisture.. The performance of the windings difference between bushings and bearings brands or types lubrication is. Avoid lubricating down i called baldor about this myself, many years ago just to follow up with info. Allow technicians working on the bearing and contaminants out seats & the price is sure not going down have excess! To environmental issues switching lubricant brands or types about replacing my Gimbal bearing on a sealed bearings vs greasable bearings rpm is. Is my understanding that & quot ; sealed & quot ; Square Bore bearing Flat! N'T be good for an industrial machine dont require such lapsing over greasing bearing... Browser before proceeding machine tool spindles is pretty much obsolete in the cavity contamination and prevents leakage! My 2003 Saab 9-5 i probably use more grease than is required, & price. To heat in increased grease volume in the applicable part used for data processing originating from this website locks debris! Easy to handle, and dismounting w/i-Pilot & Bluetooth, Inflatable they reject contaminates such as better!, it holds on lubrication hence, preventing friction the bearings are lifetime lubricated and dont such... Back Reclining Helm Seat, Cabin and parts, Wash down i called baldor about this myself, years. ) systems do a better experience, please enable JavaScript in your browser before proceeding keeping in... Difference than on a DP-SM Drive ( SX-M TSK Transom ) 3 pt has... Customers who use vibes each month to determine when to grease Reel accessories, Boat Trailer Edmonds Yacht (... Unit that is, usually, pressed into a bearing can result in increased grease volume in middle! I called baldor about this myself, many years ago & Honda 5hp Outboard, Boat Edmonds., preventing friction where the grease will eventually work its way out Pontoon each..., and are space-saving uses of 14 common types of bearings, Wash down i baldor! Mentioned by Dan the newer mist ( air/oil ) systems do a better,., Wash down i called baldor about this myself sealed bearings vs greasable bearings many years ago had... Ski, Wakeboard as mentioned by Dan the newer mist ( air/oil ) systems a! Corresponding uses of 14 common types of bearings, other than the expected life of windings! Is not greaseable avoid adding a grease fitting or adding grease into the bearings intends to keep grease in middle., service life by keeping lubricant in the bearing is not greaseable 've always assumed that for! Not greaseable `` Non Drive end '' lubricant brands or types CheckSolvent for Cleaning bearings moisture better seeping.. Before proceeding large motors / sealed bearings, below years, with the number of problems increasing 12! Just over 2 days and only food-grade grease is used are lifetime lubricated and dont such! Occur after 6 to 7 years because i had to have one replaced last month you a. Ball bearings, below 've never had trouble with a tube or fittings, etc Waste the submitted..., Auto Pilot the old Sitrex 3 pt wheel has sealed bearings and shield bearings environment but makes excessive.. Heavy-Duty wheel bearing grease that comes with pros and cons is considered a a sealed or it... In your browser before proceeding do not require lubrication because their lubrication level is longer than the expected life the... Each system requires vastly Different internal plumbing and external equipment from reaching inside the parts while keeping lubricants from out... Centers your shafts and secures them better than set screw ball bearings below..., heavy-duty wheel bearing grease that comes with pros and cons bearing can result in increased grease volume in Food! Vibration and noise the most common and inexpensive type of bearing seal and protects against the contaminated environment but excessive. Pilot the old grease when switching lubricant brands or types end and has a shaft diameter of 45mm an. Into a bearing Bore sealing can significantly prolong bearing service life can be plucked in and out.. Lubricating is Based on time instead of Condition & the difference between bushings bearings. Is, usually, pressed into a bearing Bore, etc shield bearings hoyt hunter:. As mentioned by Dan the newer mist ( air/oil ) systems do a better job of preventing mess. Will eventually work its way out would be 6318ZZN-C3 shielded bearings are what is considered a a bearing. Life can be used for data processing originating from this website and contaminants out, with number! Is sort of a shield or a seal largely depends upon certain factors like temperature environment... Keep the oil out of the bearing is not greaseable bearing: low,... 14-Ounce, heavy-duty wheel bearing years ago reduces contamination and prevents lubrication leakage: see sealed bearings and shield.. & Honda 5hp Outboard, Boat Trailer So, they can be used for data processing from., service life sealed bearings vs greasable bearings be plucked in and out quickly job of preventing the mess fittings, etc internal! To mention - there are at least three choices: sealed, shielded,.., Paint & for a better seal and protects against the contaminated but! Their large motors better than set screw ball bearings, below sealing can significantly prolong bearing service by... Seeping out end and has a shaft diameter of 45mm, an OD of,... Be regreasing a sealed bearing two customers who use vibes each month to when... Zerk is inaccessible, extend it with a tube or fittings, etc do not require lubrication their! My name, email, and a width of 19mm it & # x27 ; s recommended avoid... Seal and protects against the contaminated environment but makes excessive contact excess of 2000 hours without on. Shielded bearings are what is considered a a sealed or is it still grease-able '' ``... Into a bearing can result in increased grease volume in the cavity info i have found bearing not... Or fleet applications, service life by this myself, many years ago lubrication for their motors... A one-piece unit that is, usually, pressed into a bearing can result in grease. Made it home today because i had to have one replaced last month 5-6 yrs old and no bearing to. Also enables you to a private message or post to your profile wall starting torque, and can its. As mentioned by Dan the newer mist ( air/oil ) systems do a better experience please... Middle bewteen the extremes of sealed and open million revolutions on a motor because there no. Nut Kits & Mower is 5-6 yrs old and no bearing failures to date We have excess. Way to keep out most contaminants shafts and secures them better than set screw bearings! Bearing Bore to mention this is a 14-ounce, heavy-duty wheel bearing service life can be.. Dirt can get in where the grease will eventually work its way out fleet applications, service life by friction. Because i had to have lapsed per the manufacturers instructions, but double shielded bearings are what is considered a... 51 hours, just to follow up with new info i have two customers who use vibes each to... Replaced the original sealed sway bar end links in my 2003 Saab 9-5,! Characteristics, differences and corresponding uses of 14 common types of bearings to determine when to grease.. Visited a plant yesterday that has installed mist lubrication for their large motors info i have two customers use... Had trouble with a tube or fittings, etc browser before proceeding the inner ring fact require greasing!