Flange Bearing axial load question

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Hey Guys,quick question for any bearings experts.I want to use a pair of flange bearings like in the photo below to vertically hold up a rodon which a flat disc of 3/16" steel rests and be able to rotate slowly.I know these bearings are really made for radial(side) loadsbut could it take the vertical axial gravity load of the rod and platter of about 30lbs max ?thanks,LMM 180
Reply:It could, but will probably wear out prematurely.  A tapered bearing would be more ideal.You didn't build that.'85 Miller AEAD-200LE
Reply:Don't know your age, but I think w/ a 30 lb load they'll outlast you even w/ the side load.                                                 MikeOl' Stonebreaker  "Experience is the name everyone gives to their mistakes"Hobart G-213 portableMiller 175 migMiller thunderbolt ac/dc stick Victor O/A setupMakita chop saw
Reply:I'll give it a try and see what happens,the bottom bearing will be carrying all the vertical/axial load.MM 180
Reply:Can you get a flange block that will accept a tapered bearing and race? Maybe in self-aligning too?Bruce
Reply:On a 30 lbs load you shouldn't have any issues.Generally on deep groove ball bearings you don't want the axial load to exceed 20% of the rated load. The UC207-20 has a dynamic load rating (Cr) of 25.7 KN and a static load rating (Cor) of 15.4 KN. Using the static load value of 15.4 KN (3462 lbs) and factoring it by 0.20 should give you a load capacity of 3.08 KN or 692.4 lbs per bearing. With two bearings in the set you should be able to carry twice the single bearing... 6.16 KN or 1384.8 lbs. Deep groove ball bearings handle high radial loads and moderate axial loads. One thing to keep in mind... the cast flange may not support the axial load even though the bearing can handle it. You should design your parts to carry the bearing rather than relying on the flange itself. Of course at 30 lbs I doubt you'll have any issues anyway.Last edited by forhire; 08-15-2012 at 11:04 PM.
Reply:Originally Posted by forhireOn a 30 lbs load you shouldn't have any issues.Generally on deep groove ball bearings you don't want the axial load to exceed 20% of the rated load. The UC207-20 has a dynamic load rating (Cr) of 25.7 KN and a static load rating (Cor) of 15.4 KN. Using the static load value of 15.4 KN (3462 lbs) and factoring it by 0.20 should give you a load capacity of 3.08 KN or 692.4 lbs per bearing. With two bearings in the set you should be able to carry twice the single bearing... 6.16 KN or 1384.8 lbs.
Reply:Most any bearing catalog by the major mfgrs will have all this info in them.                                                              MikeOl' Stonebreaker  "Experience is the name everyone gives to their mistakes"Hobart G-213 portableMiller 175 migMiller thunderbolt ac/dc stick Victor O/A setupMakita chop saw
Reply:thanksMM 180
Reply:this is the basic design for my pizza oven pt2the flanges will be the blocks below, blocks above not bearings but just plates with holes in them.rotation rpm will be slow, 1rpm or so.MM 180
Reply:Don't know if this is for personal use, your own business or to sell. You should look into health regulations to see if food grade brgs AND food grade grease is required.                                       MikeOl' Stonebreaker  "Experience is the name everyone gives to their mistakes"Hobart G-213 portableMiller 175 migMiller thunderbolt ac/dc stick Victor O/A setupMakita chop saw
Reply:its for home use, the bottom is sheeted off except for a hole where the shaft passes throughI am looking at possibility of using a single thrust bearing on the bottom of the shaft.MM 180
Reply:Originally Posted by lennykI am looking at possibility of using a single thrust bearing on the bottom of the shaft.
Reply:If you go w/ the thrust brg I'd use the cheap ball flange brgs like used on a lot of farm eqpt. The kind w/ a stamped steel housing and normally have a 3 bolt flange. They seem to hold up well on combines, balers, etc. so I'm sure it would last a long time for you.                                         MikeOl' Stonebreaker  "Experience is the name everyone gives to their mistakes"Hobart G-213 portableMiller 175 migMiller thunderbolt ac/dc stick Victor O/A setupMakita chop saw
Reply:I think the thrust bearing on the bottom is the easier and better way to go,I will drill a piece of 1/4" with a hole same size as shaft and tack it to the shaft as a collar to stop against the bearing.MM 180
Reply:why dont you just use a thrust bearing?
Reply:whoops, little late on the draw there
Reply:You can get a bronze or graphite thrust bearing in 1 1/4" for just a couple bucks. A flanged sleeve bearing isn't much more."USMCPOP" First-born son: KIA  Iraq 1/26/05Syncrowave 250 w/ Coolmate 3Dialarc 250, Idealarc 250SP-175 +Firepower TIG 160S (gave the TA 161 STL to the son)Lincwelder AC180C (1952)Victor & Smith O/A torchesMiller spot welder
Reply:I put together the shaft and bearings:the thrust bearing is in the middle of the shaft and taking all of the load.I am not 100% satisfied with it however, sometimes it binds slightly and I think it is because the bottom bearing has some built in play and it causes the shaft to bind a bit with the thrust bearing washers so all three parts of the thrust bearing don't perfectly flat against each other.it does work though.Any suggestions ?MM 180
Reply:Originally Posted by lennykI am not 100% satisfied with it however, sometimes it binds slightly and I think it is because the bottom bearing has some built in play and it causes the shaft to bind a bit with the thrust bearing washers so all three parts of the thrust bearing don't perfectly flat against each other. it does work though.
Reply:I put the second bearing block and omitted the thrust bearing,much better now.Mounted motor and got everything up and running, first pie with this setup tomorrow.The motor is a cheap geared,sleeved motor I got on ebay. I didn't realize there was much variation in these types of motors. I have ordered a better motor used in pellet stoves and made to run in very hot environments and with ball bearings.This oven is capable of very good quality pies but the risk at high temps was burning as the back would be very hota continuous turning system will alleviate that and allow very high heat bakes, under 3mins.Last edited by lennyk; 09-14-2012 at 06:57 PM.MM 180
Reply:not appropiate for this application but a really cheap way to build a turntable for heavy loads or to build a welding positioner,is the floating axle rear end from a 3/4 or 1 ton pickup truck. cut out the differential section and you have the makings for two turntables with double tapered roller bearings. you can either use the axle to turn the table or cut off the axle,seal the tube to hold lube,and drive via a gear ,sprocket,or pulley mounted to underside of the table.miller thunderbolt 250vlincoln square wave tig 175 prolincoln idealarc mig sp250everlast tig 210EXTeverlast power plasma 50chicago electric (hf) 130 tig/90 arcchicago electric 90 amp flux wire3 sets oxy/acet
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