Which bit for the screw?

[nimhed]

Anyone able to see which bit is right for this floor screw?

 

[useless]

Maybe one of these?
https://www.stgbygg.se/butik/bits-fyrkant-950-1/

 

[Immobil]

Hard to see, but a square piece might fit.

Edit: second on that. )

 

[Rickard.]

I also think it looks like a square, they're called Robertson. A fantastic invention that never became anything big (outside the home country Canada) and today completely made obsolete by the Torx.

 

[nimhed]

Available in regular hardware stores, or?

 

[Rickard.]

Available in the regular hardware store, right?

Yes, they are usually also found in the slightly larger regular bit sets.

 

[lärjungen]

I also think it looks like a square, they're called Robertson. A fantastic invention that never became big (outside the original country Canada) and today completely obsolete by the Torx.

However, for some unfathomable reason, they are applied to various types of window sill screws as well as certain types of floor screws. Completely useless if you ask me. The bits/screw wear out very quickly compared to Torx and it's a hassle to install an entire pine floor that way. Additionally, you don't get the bits when you, for example, buy window sill screws, and if you realize this only when you get home (or to the construction site), you're stuck. Especially if you live in the countryside like me and have a long way into town. Now I always carry one, because you never know when they'll show up.

 

[lärjungen]

And there are a couple of different sizes available as well, so if you're unsure, buy both.

 

[Rickard.]

However, for some unfathomable reason, it is applied to several types of window sill screws as well as some types of floor screws. Completely worthless if you ask me. The bit/screw wears out very quickly compared to torx and it's a hassle to lay an entire pine floor that way. Additionally, you don't get the bits when you, for example, buy window sill screws, and if you realize this once you're home (or at the construction site), you're screwed. Especially if you live in the countryside like I do and have quite a distance to the city. Now I always keep one on me because you never know when they'll show up.

Now that the thread is over, I'm not ashamed to brainstorm a bit. Comparing it to torx is really unfair since it was invented before the star and should therefore be compared to slot and possibly PH, and in that context, it's fantastic.

You're absolutely right that it shows up when least expected. I have a memory of concrete screws with R, completely impossible to screw in because it requires quite a bit of force to get the screws in, it's t30 today. It was probably also when sid was the only impact driver. And no one really knew the purpose of them.

 

[henrikpåhöjden]

If you buy the sheet metal screw at Bevego, you always get a bit included.

 

[nimhed]

And there are a couple of different sizes as well, so if you're unsure, buy both.

Oh dear, I'm having trouble finding more than one size

https://www.biltema.se/verktyg/handverktyg/bits/bitssatser/fyrkantsbits-2-st-2000036540
https://www.bauhaus.se/bits-fyrkant-r1x25-2.html
https://www.byggmax.se/verktyg/förb...MImMzzpIT33wIVGOWaCh1Gegb-EAQYAyABEgLzd_D_BwE

 

[lärjungen]

Oh dear, I'm having trouble finding more than one size

[link]
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Ok, that's probably the most common one then. I was at a Bolist store a year ago and there were two types. Of course, I managed to take the wrong one that time. I was foolishly stingy and took a chance

 

[lärjungen]

If you buy the sheet metal screw at Bevego, you always get a bit included

Yes, there are probably those who sell with bits. However, I have encountered several brands that are merciless enough not to include it.

 

[Rickard.]

Biltema has a set with different sizes, not that I recommend Biltema bits but.
I myself have some Lunaset which has 2 or 3 different ones.

 

[lärjungen]

Now that the thread is done, I'm not ashamed to brainstorm a little. Comparing it to torx is really unfair since it was invented before the star and should therefore be compared to slot and possibly PH, in which case it is fantastic.

You are absolutely right that it appears when you least expect it, I remember concrete screws with R, completely impossible to screw in as it requires quite a lot of force to get the screws in, it's t30 today. That was probably also when the side was the only impact driver. And no one really knew the purpose of them

I can absolutely agree with that. What I don't quite understand is why today, when we live in the torx era, screws for square bits are still being manufactured. And I also don't get why drywall screws and many chipboard screws are made in the PH2 variant. Is it because PH2 is still so common? Or are there other advantages that I haven't understood?