What size are the screws that hold the hot end?

I've disconnected the hot end off of the extruder. What size are the two screws that hold the hot end in place? I'm going to take the screws with me but I have a tendency to lose small parts and in case they get lost I want to make sure I pick up the right ones.

(I have to put them in my hoodie pocket which is open. Being in a wheelchair can be a pain at times)

 

put them in a plastic bag and its less likely to get lost.
i donno the size and can't vouch for my plastic caliper

 

We did figure out the size. I don't have the package of screws in front of me, but I believe they're M3s. I'll have more specifics later.

 

Ok. Looked at the package. The screws that hold the hotend in place are 3mm .5 x 25mm. The .5 represents the screw pitch.

 

According to the videos they are 6/32" x 1 "

 

hrm. Interesting. I took mine to the hardware store and we looked for a nut that fit. That was the 3mm .5 x 25mm

 

it took me a second to read what you said. they are #6 - 32 screws. Or at least should be, most of the hardware they used is in imperial. That said the M3 .5 rods are very close though, close enough that the possibility the Chinese pulled the old "eh, close enough."

 

Actually it is the other way around. They have more metric parts than imperial.

I have been trying to build a bill of material from the videos:
http://forums.robo3dprinter.com/index.php?threads/r3d-bom.1298/page-2#post-9065

but still missing some parts

 

I'd believe it was M3 over #6, they seem to use all metric from what I gathered.

 

I would imagine that would be easier to have all screw either metric or imperial, but they do have some of both, like the threaded rod seems to be a 5/16"inch and the smooth rod seems to be 8mm

 

yeah but besides the rods are there any other imperial? I'm fairly sure everything hardware wise is M3 or so.

 

Most of the hardware is m3 and m4, metric threaded rods are harder to come by, I'm guessing that's why they went with imperial.

 

According to the videos they use imperial screws :

5/16" on the x assembly (dont know the lenght)+ washers and nuts
6.32" x 1" to hold the hot end and the filament latch

I think that's it, but I cant tell for sure, for the lack of info.

cheers

 

Seshan,

do you think they sourced the threaded rods here in US and not in China???

 

Originally they probably sourced from the US, They should switch to Metric rods if they can, it helps eliminate z ribbing.

 

they switch to acme style in the 1.2

 

yeah, but it's still imperial, they should go with trapezoidal thread rod.

 

go to know I might try to find 8mm instead of 5/16"

 

I'd go with ACME personally but to each their own. http://www.mcmaster.com/#7549k1/=pme9px is the smallest MMC has but their might be 8mm out there somwhere.