Looking for a bit more details on the machine screws used for Prusa Mk IV
Just spent 3 hrs wait time to try to get more info on specifics on the M3/M4 hardware used on the Prusa Mk 4 kit. I came up 3 M3x6r short to assemble the print bed.
I found a higher end fastener supply place and figured out that the print out on the little baggies for assembling the printer lacks some of the fine details.
- threads; coarse, fine,etc.
- Rating on fasteners
- material of bolt
- size of torx / hex
- head shape - I figure button style for most would work
- There are a few of the step down bolts; but zero references to specific details
Nothing like need 3, and having to order 100 to get it shipped. Once the printer is setup I guess I will be making a lot of those containers to store excess parts.
Once the printer is online, I will be working on upgrading my old MK3, and figure I will lose more than my fare share of fasteners.
RE:
This guide does help out with some of the facts - but not all - which are torx,
https://cdn.prusa3d.com/downloads/others/PrusaCheatsheet_MK4_EN.pdf
My best guess is thread type is always coarse
I did find I hope the M3nS - M3 Nut, Square, Slim
for high quality parts - each specific type is running about 10-ish dollars for 50 to 100 items...
RE: Looking for a bit more details on the machine screws used for Prusa Mk IV
I did find a good cheat on most of them - except the M3x6r - which decoded is an M3x6 size - round/button top. However, some kits have torx fittings, while others indicated security torx, and other hex.
The two kits I assembled were sort a torx based. The drive bit I was using was the security torx, but not sure if that was needed.
Oh the cheat, get good quality stainless steel screws that are only slightly magnetic. The best cheat for the torx m3x6r is to buy it on Prusa for $1 for 9.
web based sites that are known to have said hardware for Prusa - would be Bolt Depot / mcmaster dot com
There are a few "non-standard" fasteners that will be hard to find but I am digging for a source for those.