Chujybear
~ Elite 1000 Member ~
Hi.
For the jewellers in the house. Potentially a handy calculator.
http://mordent.com/toolsapps/
This calculator purports to figure out your blank length based on gauge, width, and the size you are shooting for.
One thing that is different than the calculation I would usually use is that it adjusts the blank length according to the formula:
If the band is wider than four mm you take the difference, subtract 4,and multiply that number by .5. So (a-4)x0.5. And add that number to the shank.
The way I always heard it was jus across the board +.5 for any ring over four mm.
Neither actually really makes sense to me, because it seems that however wide it is, the middle is still the size that counts... This just seems to be accounting for the extra distance it will have to slip down the sizer.. Which effectively makes it bigger..no? Anybody have insight into this?
I am making a size eleven ring. And measuring it according to the linked calculator, which is adding an extra 1.7 mm to my over all blank length. That seems crazy to me. But if nobody posts an answer, I may be back to St what the results were.
And if anyone's wondering how I've gotten on in life without figuring this out already, it's because I usually do my rings in slate, in the round. But this job needs to be engraved.
Thanks for the help.
For the jewellers in the house. Potentially a handy calculator.
http://mordent.com/toolsapps/
This calculator purports to figure out your blank length based on gauge, width, and the size you are shooting for.
One thing that is different than the calculation I would usually use is that it adjusts the blank length according to the formula:
If the band is wider than four mm you take the difference, subtract 4,and multiply that number by .5. So (a-4)x0.5. And add that number to the shank.
The way I always heard it was jus across the board +.5 for any ring over four mm.
Neither actually really makes sense to me, because it seems that however wide it is, the middle is still the size that counts... This just seems to be accounting for the extra distance it will have to slip down the sizer.. Which effectively makes it bigger..no? Anybody have insight into this?
I am making a size eleven ring. And measuring it according to the linked calculator, which is adding an extra 1.7 mm to my over all blank length. That seems crazy to me. But if nobody posts an answer, I may be back to St what the results were.
And if anyone's wondering how I've gotten on in life without figuring this out already, it's because I usually do my rings in slate, in the round. But this job needs to be engraved.
Thanks for the help.