Self Tappering Screws
My assembly of my Core One is a slow one. In any case I wanted to mention the 2.9x6.5 self-tapping screw are extremely weak. I unfortunately had two which come with the kit break into the part making the part useless and the screw wedged in the part very well impossible to remove.
Therefore I have to purchase my own screws, I want to know what is the name of the head on these screws, and what is the color used on most of the screws in the kit ?
From my understanding the issue with these screws as others have had is they may be the ones made with Zinc which appears very weak. As some have actually broken the screws with their own fingers. 😩
RE:
They're just Philips head screws.
Maybe you got a bad batch, but IIRC it does warn about over tightening them so maybe you've just gone in too hard.
RE: Self Tappering Screws
There is a name for the type of head on the screw, or better yet; what is the name of the screw driver used for this screw ?
The first time I probably did over tighten, the second time; yesterday, I turned less then the first time; although really not as much as the first, the head broke. Considering the other issues I'm leaning towards a bad batch kit.
RE:
That's the name of the screw and screwdriver...Philips.
If you buy the full kit Prusa supply you with one.
Its here, PH2 if you wish to buy from elsewhere:
https://www.prusa3d.com/product/screwdriver-ph2/
RE: Self Tappering Screws
What is the name of the tip of that screw driver would you or someone happen to know ?
RE: Self Tappering Screws
What is the name of the tip of that screw driver would you or someone happen to know ?
As @gb160 said, the tip of the screwdriver is a Phillips PH2.
I assume this is the single self-tapping screw in the bottom-left corner of the back panel? I don't recall from my build, but since the back panel is secured by plenty of nylon rivets I'm guessing this screw is only there to ensure a common earth. The head really isn't critical - any screw with the same thread should be fine.
RE: Self Tappering Screws
Tsk - just missed the edit window.
Assuming it IS only for earthing, any screw with the same thread *and a bare metal finish* should be fine.
RE: Self Tappering Screws
My assembly of my Core One is a slow one. In any case I wanted to mention the 2.9x6.5 self-tapping screw are extremely weak. I unfortunately had two which come with the kit break into the part making the part useless and the screw wedged in the part very well impossible to remove.
I don't understand the type of problem you have experienced. If the screw is securely "wedged in the part", isn't that the goal of the exercise? The screw is really just there to ensure that the back panel (which is otherwise held by plastic rivets) has good electrical contact with the chassis frame.
If, on the other hand, you have stripped the threads in the frame part by now, you will need to buy a slightly larger screw -- another 2.9 mm screw won't get a solid hold.
And yes, that screw head and the corresponding screwdriver tip are called "Philips". Besides gb160 answering that twice, it's also right there in the assembly manual, where the tools are introduced: "Philips (PH2) screwdriver".
RE: Self Tappering Screws
My assembly of my Core One is a slow one. In any case I wanted to mention the 2.9x6.5 self-tapping screw are extremely weak. I unfortunately had two which come with the kit break into the part making the part useless and the screw wedged in the part very well impossible to remove.
I don't understand the type of problem you have experienced. If the screw is securely "wedged in the part", isn't that the goal of the exercise? The screw is really just there to ensure that the back panel (which is otherwise held by plastic rivets) has good electrical contact with the chassis frame.
If, on the other hand, you have stripped the threads in the frame part by now, you will need to buy a slightly larger screw -- another 2.9 mm screw won't get a solid hold.
And yes, that screw head and the corresponding screwdriver tip are called "Philips". Besides gb160 answering that twice, it's also right there in the assembly manual, where the tools are introduced: "Philips (PH2) screwdriver".
I do appreciate the answer as to what type of screw driver I need to use; which I knew. The explanation on it's purpose is more clear, although the screw in my case doesn't hold the back panel even though the screw head is gone. Why I mentioned I need to get another screw, because they are small and self-tapering they wedge themselves into the panel and they are difficult to get out, and yes I've used some good tools for small areas and they slip.
Therefore since I want screws identical to these, hopefully I find ones that are built more solid and if what I read is correct, not just made from zinc.
RE: Self Tappering Screws
I do appreciate the answer as to what type of screw driver I need to use; which I knew. The explanation on it's purpose is more clear, although the screw in my case doesn't hold the back panel even though the screw head is gone. Why I mentioned I need to get another screw, because they are small and self-tapering they wedge themselves into the panel and they are difficult to get out, and yes I've used some good tools for small areas and they slip.
Therefore since I want screws identical to these, hopefully I find ones that are built more solid and if what I read is correct, not just made from zinc.
Sorry; either your way of using English is different from mine, or your way of thinking. How can you say "I knew" after asking about the name of the screw and screwdriver three times in a row, even after being told repeatedly?
Also -- do I understand correctly that the actual problem is that you tore off the screw head? Then of course the screw can no longer push the back panel against the frame, since it would be the screw head's task to do the pushing. Before you buy new screws: Have you figured out how to remove the old one? Can you pull off the back panel and then grab the protruding end of the screw with pliers and turn it?
As a side note: I don't know where you are based and whether you need to buy the screws using English terminology. The screws are "self-tapping" (the cut their own thread) They are also "tapered" (become thinner towards the end), but that's not usually mentioned when they are offered for sale. There is no such thing as "tappering", and using that term might cause confusion.