When I try to remove severed bolts using a regular drill bit and bolt extractor, it almost never works. It only works like 1 out of 10 times if I’m lucky.Do left drill hand drill bits work? How many times out of 10 would you estimate does it work?
>>2951377Or is it better to weld a nut onto most broken bolts or screws and remove it by turning the nut? I see that method used a lot in Youtube videos. Is there a way to weld a nut without using a huge acetylene tank setup? I work in the railroad industry and it is not feasible to get that everywhere.
>>2951418>Or is it better to weld a nut onto most broken bolts or screws and remove it by turning the nut?If it broke because the bolt was rusty this can be effective. If it broke because it was loctited in and someone went gorilla mode with a breaker bar then this probably isn't going to do anything. You can do pajeet tier welding with a car battery
>>2951377They always force the rest of the material into the sides for me and just creates a through hole but a mess of fucked shit
>>2951418theres no one size fits all solution for this shit because its always trying to make chicken salad out of chicken shitlefthand drills only really work on screws with stripped out heads. you bave to drill the head off anyways so you might as well try to get 2 birds stoned at once with the lefty. works about 1/3rd of the time. LH suck dick because theyre basically self destruction tools if they work as intended. you dont typically want a drill to catch and grab when youre drilling but thats exactly how a lefty works. so it inevitably at minimum chips the fuck out of the cutting edges or usually snaps the drill off. hopefully it doesnt leave the piece of drill in your already stuck screw thus exponentially increasing the assache. basically i limit LH drills to clean parts held in the vise on the bridgeportfor rusty stuck and/or galled heat is critical. if the bolt is over 3/4" i just go straight for the gas axe and blow a hole straight through the center as the 1st act. smaller bolts ill drill a smallish hole 1st then open it out with the torch. it sucks on blind holes because theres nowhere for the slag to go but back in your face. then weld a nut on top and drown it in kroil. on big shit i throw a bucket of water on to better heat shock it. the rapid contraction from red hot usually breaks everything free. then just gently work it back and forth while oiling the shit out of it. dont be afraid to heat and cool several times
>>2951435i need to replace my favorite set of extractors not shown above as theyre laying out in the middle of some clearcut after i forgot them on a skidder bellhousing. they were the old rigid brand ones that have a drill guide that threads into the hole so you get the drill dead center without much fucking around. then they have straight flute splined ezouts matched to drive in the drilled hole and grab without swelling the bolt body up. theyre the cats ass for flywheel and elastomeric coupler bolts on pump drives that always snap off down deep in the crank flange i like the straight flute ezouts over the twisted cone shit. the twisted ones pull in and expand the bolt making it harder to back out. i tap solidly on the ezput as i work it. the goal is to break up the rust thats jamming the treads inside
If the screw is loose enough and you just need to get a bite on it, then they work pretty good. If it's stuck, I usually just try to drill it out and retap. AI'd say a small set is worth it just to have another option for dealing with broken fasteners.
I've never seen the benefit. Extractors are incredibly easy to use, you just need a little practice.>>2951419>If it broke because it was loctited inHeat from the weld will soften the loctiteProtip, stubby extractors exist and work on stripped out internal hex bolts.Flathead and buttonheads that are stuck can also be loosened with a well placed punch.
>>2951506Using a regular drill bit then an extractor after almost never works.Loctite isn’t usually the problem. If you’re the first person removing a given bolt or screw in a decade or more, it tends to get corroded or rusted on.
>>2951524>be presented with multiple accounts of clear information >ignore it all and squeal that youve changed nothing and its still not working this is why nobody likes zoomiezooms
I'm glad I don't live in the rust belt. Also I'm not 100% retarded so I can feel when a bolt is not coming out, and stop and re-asses the situation before continuing. Usually a bit of heat and impact before the bolt head snaps off is all that is needed to keep from breaking it and getting it to come out in one piece. If it is a through hole with a nut on the back side, fuck it. Break that piece of shit and punch it out the other side. Have had decent luck with extractors. Sometimes you just gotta drill out and re-tap.
>>2951543Re-assesHehe
>>2951545Lol. I made a case for a socket set out of an old road flare/triangle kit and still get a good laugh every time I open the lid and see the sticker with the "erection instructions"
>>2951535There are so many videos on Youtube showing that a regular drill bit and extractor won't work most the time. I have also found out from experience the same. Hence why I created this thread to ask if others think a left handed drill bit set is worth investing in.The most sure fire way, if possible is to use a acetylene torch and weld a bolt, then you unscrew that bolt you welded on. But I work in a huge facility and hauling over a torch would be a huge project and time sink in itself.
>295155atetheyll let anybody be a millwrong anymore. apprenticeships existed for a reason
>>2951558what do you think a left handed drill set is going to do for you exactly?
>>2951615NTA, but 90% of the time the broken bolt has come out for me just drilling it with the left-hand bit. I live in the rust belt.
>>2951377>>2951435>>2951615Where can I find a good set of cobalt drill bits?Pic is from my local hardware store. I think they sell sets from Drillco in a hard Huot drill index case. But they are excessively expensive.
>>2951485I’m with this goy. I have a 5pc set of them. I’ll try drilling out a bolt with those first and sometimes get lucky. Otherwise step up to better regular drill bits until I get a hole the extractor really bites in. I’m not in a rush to drop $$$ on a big left handed 29pc cobalt set tho.>>2951644They’re not going to be cheap from one of the machinist type brands.Milwaukee-DeWalt-Irwin-Bosch will all sell you affordable sets of like 15pc M35 cobalt bits. A 29pc from Chicago Latrobe or Cle-Line or Viking will be a couple hundred I’m sure.Remember M42 is the stronger cobalt, M35 is a little less tough. But you need to be careful with them in hand drills or they’ll snap like a twig unless you run it super straight. Cobalt is hard and tough but brittle.
>>2951644>Where can I find a good set of cobalt drill bits?>Pic is from my local hardware store. I think they sell sets from Drillco in a hard Huot drill index case. But they are excessively expensive.Not sure how good they are, but I've had great luck with e-bay cobalt bits in right hand version... Might even pick up a set of these left handed ones myself. The only left hand bits I have aren't all that great in my experience, and might be a lot better in cobalt flavor. https://www.ebay.com/itm/354838955505
Wow, not what I expected.I have an incredible track record with them when the head of something is broken off. So, you gotta note the only thing holding the fastener in now is corrosion, once you start it moving it *should* be easy.I probably start with a much smaller bit than most of you, but you are using the left handed bits to make heat as much as use force. Smallest one you can, as plumb down the middle as you can. By the time you are on the second or third size up, just playing with your nice drilled hole in the middle, the faster is hot as hell, and will start to move. you get your drill bit out of there as you see/feel that or with varying pressure get enough out you can use a vice grip.use them to make heat and break their hold, not grab the thing and rip it out.i obviously love em. i weld nuts on stuff with a flux core buzz box setup and 4000w inverter generator. hold the nut with fuel line pliers, arc till the nut glows RED, let it cool.quick n easy. i love flux core too. Maybe im a hack
If you're breaking extractors trying to get bolts out a left hand drill is not going to improve the situation one bit.
>>2951719I’m not breaking extractors. I got a cheap pair of Century ones at some local hardware store. But it’s not a hard enough metal and after a drill big hole and try to hammer it in the threads on the cheap extractors get destroyed on stainless steel bolts. I know that Project Farm has a video on the best extractor but I haven’t seen it yet. Does anyone if someone just posts the graphs and analysis from Project Farm’s videos as text so I don’t have waste 20+ minutes watching dozens of videos each purchase? “Project farm: best bolt extractor”> https://youtu.be/xStDDRevrbg?si=q6BMaKG1m59TGbNy
>>2951377I saw this for $90+:https://www.amazon.com/MACXCOIP-Hardened-Stainless-Plastic-Storage/dp/B0D3LWCKP6/ref=asc_df_B0D3LWCKP6?tag=bingshoppinga-20&linkCode=df0&hvadid=80745576691634&hvnetw=o&hvqmt=e&hvbmt=be&hvdev=m&hvlocint=&hvlocphy=98247&hvtargid=pla-4584345046354789&psc=1&msclkid=41eeeb4642361570c18383b20f4fff26
>>2951889Hey man did you know you can delete everything from the question mark on so your link isn't ridiculously long? https://www.amazon.com/MACXCOIP-Hardened-Stainless-Plastic-Storage/dp/B0D3LWCKP6/ref=asc_df_B0D3LWCKP6
>>2951896bloatamzn.com/dp/B0D3LWCKP6
>>2951670>egay354838955505>chinkshit drills in a hout box>emphasis on usathats pretty trashy merchant behavior
>>2951917Yeah they are obviously chinese cobalt bits in an American box, but a hell l of a lot cheaper than any others I've seen. I have had excellent luck with import cobalt bits...>>2951898Nice.
>>2951377It really only needs to work once or twice to be worth it.
