bearings

MSD · Apr 4, 2011

I am replacing some transmission bearings in a G JD. One that I took out has a New Departure number on it but it is not what is called for in the parts book. Price wise from JD, the correct number is $74. The one that was in there is $49. All the dimensions are the same according to the JD web site with the exception of the "dynamic rating". My question is, what exactly is the dynamic rating. I found this same thing with one other bearing in there, same dimensions but a different dynamic rating and a price difference of $65 versus $13. This might explain why there is such a price difference sometimes between bearing suppliers and JD.

Anonymous-0 · Apr 4, 2011

Dynamic rating is what load the bearing is rated for at various rpm.

Areo

MSD · Apr 4, 2011

In this case, the cheaper bearings have a higher number than the more expensive ones. So does a lower rating mean it handles a load better? Example: Bearing JD7670 has a dynamic rating of 0.00 LBF. It costs $74. JD bearing RE24510 which is Federal 1307, has a dynamic rating of 5,732.626 LBF and costs $44.99 Both bearings have the same dimensions. It had a ND 1307 in it when I took it apart and when I tried crossing the 1307 number to a JD number it comes up with the Federal one.

Anonymous-0 · Apr 4, 2011

Best to put it in the search engine because it covers powerlines to the human body which no one would have the time to explain it here, but in the case of powerlines, climate also affects it. but I did see one item which says "Dynamic Rating enables controlled emergency loading beyond nameplate rating." so they may be a better bearing? and you will pay for it. Frankly I would take my old one into a Bearing Supply and get a replashment without all the modern hype.My 56 Fordson is still running on the original bearings.

greygoat · Apr 5, 2011

ANYTHING painted GREEN, including replacement
parts---usually costs more!

Mike M · Apr 5, 2011

Whatever that rating is ? you have a HUGE differance and the one being 0.00 looks to me like it isn't the rating just that column not filled in.

Many times bearings will have a different amount and size of balls.

MSD · Apr 5, 2011

I wondered afterwards if it was left blank also. I don't believe in using the cheapest part out there. JD has part numbers for and sells both bearings so it isn't the color that makes the price difference as stated above, it has to be a quality thing. Thats why I hesitate to just walk into a bearing supply place and they will cross numbers and you hear them say this one should work for you when they don't know anything about the application.

BDT in Minnesota · Apr 5, 2011

load capacity, speed, side load, seals,retainer grooves,actual width.. ID and OD are only two of the many specifications for a bearing.

buickanddeere · Apr 5, 2011

(quoted from post at 08:19:10 04/05/11) ANYTHING painted GREEN, including replacement
parts---usually costs more!

Talk a walk into a non green delaership and ask for a bearing from a 1953 or older machine.
If they can still find the parts books and cross reference back through the mergers. And if the parts are still stocked. Then get prepared for the price.

bearings

MSD

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Anonymous-0

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MSD

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Anonymous-0

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greygoat

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Mike M

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MSD

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BDT in Minnesota

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buickanddeere

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