drill bit sized explained

psd99

psd99

psd99

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Joined
7 Sep 2008
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hi guys I need a 3/16" drill bit for my tv wall mount

also says I need a 1/2" inch masonry bit

+

wrench


firstly could I get away with not having a wrench and instead using a spanner?

secondly for the drill bit - what do the numbers 3/16" really mean?

(diameter? lenght?? - the actual length of my bolts are just under 7mm.

thanks
 
cheers - yer so it is masonry (blocks)

I'm going to check out the m8 coach screws first if they are needed in the blocks

then I need to get the correct drill bit -
 
AcidHell2 said:
This, but then again you need to learn.

wrench = spanner

3/16ths and 1/2" is the diameter as said a thousand times.
Masonry means a drill for drilling into brick type stuff.
The small drill will be to make a pilot hole, I would have thought.

Depends what your drilling into but small one should be masonry as well, or at least a multi purpose one.

Length, drill sare pretty much standard size and should be long enough for most things. you can tell how long you need by the bolt/screw/wall plugs you are using. There are longer drills to drill all the way through standard walls.
are you sure it's 7mm that is an awfully short bolt, what is it being screwed into? some sort of wall plug?
Click to expand...

yes check this out:


DSC_0073.jpg


DSC_0074.jpg


DSC_0077.jpg


it is going into a concrete anchor...
 
AcidHell2 said:
70mm not 7mm.
I would drill a pilot hole as well, the bigger drills will tend to skip about a lot without a pilot hole.
Click to expand...

so do you think m8 coach screws would be more secure in my block wall
or

do you think the bolts and concrete anchors in my pic will be okay?
 
stulid said:
So drill as deep as about 5cm, and use a maximum drill bit width, that by eye, is about the same or thinner as the wall plug, the screw going into the wall plug will cause it to expand and grab the bricks with those barbs.
Click to expand...

they "is" blocks

I aim to make it a tight fitting - prob 5-6 cm deep
 
AcidHell2 said:
Use what ever the kit says and always use what ever the kit says for drill size bit.
Click to expand...

exactly - that's the problem kit says "not intended for cinder blocks or steel studs.." lol - that's why on the other thread it was mentioned to use m8 coach screws.
I'm yet to go to DIY store will do tomorrow
 
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