Calculating The Mass / Cutweight Of Bearing Races

Are you looking for the cost of the material used for each component? This will depend a bit on the manufacturing process. If you are making from cut blanks, you should make allowance in the blank size for machining both sides, If you are making from bar you also need an allowance for parting off the component and the wastage of the last piece of bar which is too short to hold & machine. There are reference works which will show you how to calculate the time & therefore the cost of various machining operations but you really need an engineer to advise on the specific machining processes required for each part.

Dear Nigh,

Thanks for the efforts, first of all, I intend to go with round bars of EN31 grade of alloy steel. Secondly, I do agree that the allowances has to be considered while calculating the cutweight of the cutpiece of the round bar used for specific size. But that is applicable on the exact size worked out from the equation pertaining to the ID / OD. Again, there will be certain allowances which has to be considered in the terms of burning loss while forging the rings and heat treatment / annealing. Am through with that data, only missing link with me, is the base or grass root information that, how to calculate the size / weight of the bar cut piece used to forge any particular size race..

Hope am clear with the point.

Thanks a ton again, hope you would be able to guide me now??

Regards

Rajiv

only missing link with me, is the base or grass root information that, how to calculate the size / weight of the bar cut piece used to forge any particular size race..

If understand your question, I would not do a caculation, just find the bar closest to your application, to caculate the size and then specify it to your supplier may require what is called a "mill run" where the steel mill will run material just for you, and the cost would be 8 to 10X what you would pay if you just took off the shelf bar stock. See what you need for a finished size, add say .05 to .1" to the diameter and see if there is a stock size out there you can use. it's much cheaper to take one or two extra passes on the lathe then it is to buy a mill run.

good luck

Dear labyguy,

thanks for the suggestion, I appreciate that, one should always opt for easy way out in manufacturing to ease the persisting, probs. well in my case i would also agree to some extent with your way.but provided i should know or atleast would be able to determine the bar size first which would be applicable, secondly, my idea for knowing the equation on how to calculate the weight or mass of races is that for calculating the cost factor. Like, if i would know any of some such equation where i could atleast stand near to perfect parameters require for forging the races, i feel i would be able to bring my purchases to lower side.

Hope point is clear.

Thanks again,

Regards

RAJIV

Dear Labyguy,

Regards, there was no suggestions so thought of dropping a word to your good self. I require a specific equation for calculating the mass of a round bar cut weight. See if you can help me any where.

thanks