odd sizes on rods?

What's with the odd sizes on the threaded/smooth rods in the BOM for the Prusa?

ie:
M8×294mm front / rear

8mm×406mm Y-bar

why not 295 or even just 300mm for the front/rear
and 405mm for the ybar.

which brings me to another question:
Could the overall size be tweeked so we can get most the rods the same size and make it a little bit more simple?

Note: I've not built one yet so I might be missing something obvious.

Edited 1 time(s). Last edit at 10/14/2011 06:03PM by se5a.

I simplified the measurements and made mine slightly larger based on the material length. It prints 220 x 215.

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The linear bearing version needs shorter X axis rods too

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Experimenting in 3D in New Zealand

Sublime Wrote:
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> I simplified the measurements and made mine
> slightly larger based on the material length. It
> prints 220 x 215.


yeah if we're cleaver we can tweek the mesurements to get the most out of the most comonly sold lengths of rod (1m I think?)
if we're extra clever and keep the triangle proportions the same, we won't have to adust the printed parts.

I get my smooth rods in a 6m length and I then cut to whatever size I need, whereas the threaded rod only comes in 1m lengths here in NZ

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Experimenting in 3D in New Zealand

Good to know, I'm probibly going to end up trying to source most parts before heading down to Christchurch from Auckland, used to work for the trampoline and swing factory, who should probibly be able to get me some of the steel parts at a good price. should be able to get the m8 nuts from them dirt cheap anyway.

I get all my nuts bolts and threaded rod from Blacks fastenings, although Hylton Parker do the same and I get smooth rod from Tata Steel who have offices everywhere

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Experimenting in 3D in New Zealand