drills

[new to this]

can you buy drills that cut to the bottom of a hole ( ie know point on the end of the drill bit ) ?

dave

[73stagman]

you mean flat bottom drill bit?

[73stagman]

Drill the hole first to the required depth. Then regrind the drill to a flat end (I will do one for you if you want to send it here or tell me what size and I will send one to you) and redrill the hole

[new to this]

you mean flat bottom drill bit?

yes thats what i mean

[73stagman]

It can be done but you cant drill the full hole with one. So that's why I said to drill the rest of the hole first. I guess you will want to tap the hole as well? So make sure your hole is deep enough to clear the tapered end of the tap (Even a "bottom" tap (I don't mean a slight kick to the nether region) has a tapered thread at the very end so you cant thread fully to the bottom of a hole)

[1959terry]

If you was using a pillar drill you could use a milling tool however I would not recommend using freehand as you may make the hole oval.
Also agree with 73stagman drill the hole then resharpen the drill with a near flat end and finish off the final bit
Ps why is it so important to have a flat bottom in the hole?

[73stagman]

Ps why is it so important to have a flat bottom in the hole?

This is a good question an done I didn't think of!

[new to this]

what im trying to do, is drill a door hinge, the idea is to be able to get oil into the hinge,you can drill the hinge, but i dont want to hit the pin im using 3.5m drill bit

dave

[73stagman]

That's a f****** big door hinge!


So a 3.5mm drill bit is hard to modify as its so small but I can do one if you like! Or drift the hinge pin out, drill the hole then knock it back in?

[new to this]

not very good at these modern metric things, should be 3.5mm

[1959terry]

That's a f****** big door hinge!


So a 3.5mm drill bit is hard to modify as its so small but I can do one if you like! Or drift the hinge pin out, drill the hole then knock it back in?

Agreed. Or just remove the pin grease it up and forget it for another 40 years

[new to this]

Agreed. Or just remove the pin grease it up and forget it for another 40 years

not so easy on a stag hinge,the pin has a rounded collar that you need to cut of, than you can remove the pin if your lucky,the pin is more than likely rusted in place,

dave

[73stagman]

I have some spare hinges if you want them? Cant tell you which side they are for from here but will look tomorrow if it helps

[new to this]

I have some spare hinges if you want them? Cant tell you which side they are for from here but will look tomorrow if it helps

neil

thanks for the offer,but have just bought some from robsport,there better than what i had before,but will drill them any way

dave