UK Karting - Notice Board (4-Stroke Karting) : Re: The best 17mm front wheel bearings

Notice Board (4-Stroke Karting)

Re: The best 17mm front wheel bearings
Posted by 'SimonS' on 19 Dec 2010 @ 10:40

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SimonSJoined: December 2004
Total Posts: 4
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" you say taper roller bearings would be better, and I've always thought this and wondered why we don't use them - any ideas??"

Two reasons.

Ordinary taper roller bearings are split. The inner cone and the outer cone are separate. (indeed SKF will sell you the halves separately).

And they cost �24 each. They are directional, so you need to buy one left and one right for each wheel.

Since karts suffer high axial and radial loads (it's the shock load from hitting a kerb rather than the static load) you really need to preload the bearing, tighten it up by a precisely measured amount for proper performance.

Which isn't easy to do when you are suddenly changing tyres on the grid.

You can buy special sealed bearings containing one right and one left taper, as for car wheels, which are preloaded. Then you only need one per wheel and a standard ball at the other end.

The price is quite high, measure with a telescope.

Look at the SKF website..angular contact bearings and taper roller bearings.

However, if you are attracted by the thought of double row taper bearings, read the minimum load precautions "To achieve satisfactory operation, double row tapered roller bearings, like all ball and roller bearings, must always be subjected to a given minimum load, particularly if they are to operate at high speeds, or are subjected to high accelerations or rapid changes in the direction of load. Under such conditions the inertia of the rollers and cages, and the friction in the lubricant, can have a detrimental influence on rolling conditions in the bearing arrangement and may cause damaging sliding movements to occur between the rollers and raceways."

Then think that these are basically designed for things like rolling mills, so you are probably running these bearings in 'damage mode' all the time.

Message Thread:

The best 17mm front wheel bearings by 'GregLGracingmanager' (17 Dec 2010 @ 21:13)

Re: The best 17mm front wheel bearings by 'BrianP' (17 Dec 2010 @ 22:11)

Re: The best 17mm front wheel bearings by 'arfur298' (18 Dec 2010 @ 12:29)

Re: The best 17mm front wheel bearings by 'lambstales' (18 Dec 2010 @ 21:04)

Re: The best 17mm front wheel bearings by 'BrianP' (18 Dec 2010 @ 21:17)

Re: The best 17mm front wheel bearings by 'Eddy' (19 Dec 2010 @ 9:29)

Re: The best 17mm front wheel bearings by 'BrianP' (19 Dec 2010 @ 10:36)

Re: The best 17mm front wheel bearings by 'SimonS' << You are here!

Re: The best 17mm front wheel bearings by 'BrianP' (19 Dec 2010 @ 10:50)

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