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Joblow
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Joined: 05/01/2010
Location: Australia
Posts: 54

Posted: 11:57am 03 Sep 2010

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I mentioned this type of bearing on another post which had quite a discussion on the pros and cons of Taper Roller and Deep Groove bearings, as there seems to be some confusion as to exactly what Angular Contact Bearings are

please read on.
Angular Contact Bearings have the ability to cary both radial and thrust loads with much less friction than taper roller bearings. They can also be mounted in multiples: back to front, front to back, back to back and front to front, care must be taken however to get matched ground faces if used in multiples for increased thrust capacity,they also come in standard program sizes so can directly replace other types of standard program bearings. Please see diagram below.
I have used these bearings with success for many years as substitutes for more conventional bearings in both mining machinery and custom built machine tools

The man who never made a mistake never made anything

MacGyver

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Joined: 12/05/2009
Location: United States
Posts: 1329

Posted: 05:31pm 03 Sep 2010

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Joblow

Hey! Thanks for that bit of information. Do you suppose you could toss up a link where one could buy these, preferably the place where you buy them. I know I could google it, but I don't know the real Mc Coy from a knock off and it appears since you've used them in the past, you could direct us to the best one.

Thanks.

. . . . . Mac

Nothing difficult is ever easy!
Perhaps better stated in the words of Morgan Freeman,
"Where there is no struggle, there is no progress!"
Copeville, Texas

Bryan1

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Joined: 22/02/2006
Location: Australia
Posts: 1344

Posted: 07:11am 04 Sep 2010

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I repair industrial gearbox's for a living and very few gearbox's use angular contact bearings, one exception is Rossi gearbox's that use a pair of back to back angular bearings. Tapered bearings are mainly used and are considered the most robust bearing for radial and axial thrust, depending on application the end float or pre-load is critical for long term use.

Most wind genny sites will tell users to have the tapered bearings loose in the hub, where in reality a light pre-load will server the bearings the best. As the bearing won't heat up with the considered low speeds a wind generator produces any end float will cause cage damage in the long term.

With my 2hp motor conversion I used a dual row ball bearing (5204) which takes any thrust my 3 metre blade set throws at it. As the front bearing on a wind genny only takes an axial load it's the rear bearing that takes all the radial load. One design I'm working on is a full complement bearing for the front bearing and a matched pair of tapered bearing for the rear. The drag from seals is very low so people who refuse to use them are just asking for an early bearing failure.

Cheers Bryan

Joblow
Regular Member

Joined: 05/01/2010
Location: Australia
Posts: 54

Posted: 12:35pm 06 Sep 2010

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Hey Mac. I don't know which bearing providers there are in your neck of the woods so can't advise you there, but I suspect that like here in Oz any reputable supplier would have them.
Thanks Brian1 for the additional info, I wasn't suggesting that they would take the same load as a taper roller, but that they may be a more suitable alternative in some mills where a larger energy gobbling taper roller was unnecesary

The man who never made a mistake never made anything

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