McMaster BOM for Metric Prusa Vitamins

The SAE Prusa wiki page has a very convenient list of McMaster-Carr part numbers for those of us in the USA, but I haven't found a similar list for the metric model, so I tried putting one together in Google Docs. (I'm happy for this list to go into the wiki or elsewhere once it's been checked, but for the time being, I didn't want to mislead anybody.)

Side-by-side SAE vs. Metric BOM

I haven't put together a RepRap yet, so I used my best guesses from the Mendel parts list, but there are a few lines I haven't filled out yet. Has anyone gone through this exercise, and can you help me fill out the rest? Are there better parts to use than the ones I listed?

So far the prices look pretty comparable for SAE vs. metric. I get $85.31 for SAE, and the metric parts will probably be in the mid-$90s.

Edited 1 time(s). Last edit at 03/17/2011 11:59PM by TMaccius.

My breakdown.

This might help. Might be incomplete.

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-John, San Diego, CA

www.youtube.com/user/GeoDroidJohn

MrJohnEcker on Twitter, Gmail

John -- Thanks for that! I like your breakdown of "Lowest Cost Possible" -- if you were building multiple copies or selling kits -- versus the actual "Cost Most Likely" to build one.

Here are the differences I see between your list and the one I posted earlier:

* Your M3 x 10MM BOLT (MOTORS) (91290A144) is actually an M4. The wiki has 91290A115 for that part.
* Your 5/16" washers (91090A110) are slightly smaller than the wiki's (90126A030) and come in a smaller quantity (100 vs. 192) but at a slightly lower cost per box ($3.87 vs $4.17).
* Using the 6' rods (98914A030) in your list is more cost effective than using 3' rods (98841A030), both on a per-foot basis and because you get help on the cut list, so you save $3.14. I wonder what this does to the shipping.

Other parts:
* I didn't have zip ties (7130K12). Probably a good idea!
* I feel like you should be able to get cheaper stepper motors than $14.95, but there seems to be a general stepper motor shortage going on, so maybe that's the best available.
* The RAMPS DIY kit ($162) isn't too hard to put together. For the cost difference, someone who already had a decent soldering iron could pick up a few Adafruit kits to practice soldering on.

I've become aware of a couple other BOMs. Maybe these should all go in the wiki somewhere, or become wiki pages themselves?

[www.alephobjects.com]
[spreadsheets.google.com]

I cant find the SAE BOM anywhere, and this one seems down atm, could anyone re upload it?

I ask because I'm not buying from McMaster-Carr and need the exact numbers

The SAE one is just on the wiki:

[reprap.org]

I haven't updated my Google doc in a while, but for some reason I couldn't open it either. And just after typing that, it seems to be back online.

If you come up with a parts list from another supplier, post it somewhere online to save someone some effort.

Personally, my prusa is built using all SAE parts except the small (m3,m4) bolts and the m8 threaded rod for the z axis... makes it the same as any other metric mendel

I'll throw mine into the list, too, in case it's helpful - includes part numbers for both the extruder and printer. [docs.google.com]