/diy/ - Do It Yourself

Start with a v-block w/ clamp

>>1598201
don't have one

>>1598204
then cut a piece of wood?

you will never drill a perfect center hole in the bolt with a press, the drill bit will wander due to its flex and a twist drill doesn't even drill a round hole
Just eyeball it

>>1598198
Center punch the bolt, top and bottom, then center drill it top and bottom. Only has to be a couple of mm, you can use a hand drill. Clamp the center punch in the vise pointing straight up. Lower the quill, with the bit in the chuck, until it almost touches the tip of the center punch. Align them perfectly. Using a wrench on the bolt in one hand and pliers in the other, set it up with the divot in the bolt resting on the center punch. Hold it there, then with your third hand lower the quill and start drilling, using your fourth hand to apply cutting oil. (You're drilling into the divot on the top of the bolt) Once you're halfway through, stop, turn the bolt over, and drill in from the other side until your holes meet. It'll probably wander out the side, but at least the guy you've got there bring your extra hands will get a good laugh out of it.

>>1598198
Get a chunk of metal or hardwood. Clamp to drill press table. Drill hole to snugly fit the bolt's shoulder. Insert bolt and snug up nut from below. Remove drill bit (used above) and put a self centering bit in the chuck (see pic). Make a starting hole. Now switch the centering bit for the diameter bit you need for your hole. Drill hole.

DO NOT move the drill press table or block throughout the above operations.

>>1598198
ask a friend with a lathe to do it
>inb4 how do i make friends

>>1598289
>Drill hole to snugly fit the bolt's shoulder.
Oh yeah. Almost forgot: Start this hole with centering bit as well. Using a center punch can mark hole slightly of center and the drill bit will just wobble slightly to follow it. And check block for being square to drill bit/chuck axis before starting.

This is a boring question

>>1598198
Make a v block out of three nuts. More like a cradle. I do that shit all the time.

are you talking about the bolt or the bolt carrier?

>>1598198
take a 2x4, drill a hole in it, then washer and nut the bolt to that and mount the 2x4 to the drill plate on the press... shouldnt be that tough

>>1599037
i thought i knew what this thread was about until now

>>1599126
I'm not sure I understand either. carpenter 158 is case hardened and pretty hard so you probably want to use a carbide center drill to start. you would be even better off if you can spotface with a carbide endmill and then center drill. I don't really know why you would want to drill a hole in one though unless you were trying to use an oversize extractor pin or something.

>>1599067
Acctually a pretty good solution.

Do this process;
-attach a piece of scrap wood to the metal drill press table, drill a hole in the wood sized the to bolt.
-Bolt the bolt through the hole centered
-Center drill the bolt
-Drill the bolt a little small, use ALOT of fluid and keep things cool
-Ream the hole

You can skip the ream and just use the proper sized drill bit if you don't have the right sized ream. Honestly though a lathe of bigger drill press is the way to go.

i was actually also trying to drill press a bolt the other day, the fucking bit kept bending whenever it touched the bolt
i grinded a V into it, clamped and center punched that, it sorta worked but didn't end up coming out looking all that nice

sticking it in a 2x4 seems like a good way to stop the bit from deflecting, i might try this tomorrow just to see how well it would have worked

>>1599146
Bolts can be hard. You will need something like a carbide bit. If the bit bends, you are pushing too hard.

Drill bits are usually not self starting. So they will slide around on a flat surface until they bite. And if that isn't where you wanted the hole, too bad. This is why you need to center punch or use a centering bit.

>>1598198
you don't