Drilling (or burning) large holes???

   / Drilling (or burning) large holes??? #41  
...adds a lil lube, and flashes off pretty fast.. thus carrying heat.

soundguy

I had never considered that the flashing off of the lube contributed to the cooling. It makes sense, though. Thanks.
 
   / Drilling (or burning) large holes??? #42  
yep, takes energy for the phase change / vaporization. that energy comes from somewhere.. :)


soundguy
 
   / Drilling (or burning) large holes??? #43  
i've used a router speed control device on a drill press before to get slower speeds than the standard pulley/ belt setups can give. I find most consumer grade drill presses are not suited for drilling metal , if you look at check speed.

Very true, there have been times (mainly when drilling large holes like we're chatting about) i've considered slapping a 3ph motor on my JET DP and a nice 3 Phase VFD so I can get true variable speed.
 
   / Drilling (or burning) large holes??? #44  
i've used a router speed control device on a drill press before to get slower speeds than the standard pulley/ belt setups can give. I find most consumer grade drill presses are not suited for drilling metal , if you look at check speed.

Great idea, Chris.

I've seen those at HF, but never could think of anything I could use one for (till now). :)
 
   / Drilling (or burning) large holes??? #45  
Just a tip if you are using a hole saw and a hand drill. Drill a 1/4" hole in the center of where you want the hole first. Then replace the centering bit on the hole saw arbor with a solid 1/4" rod.
 
   / Drilling (or burning) large holes??? #46  
I use a product called "Rapid Tap" cutting oil. It's had several different formulations over the years, the latest isn't combustible when it touches aluminum anymore (the old stuff was INTERESTING), and is supposedly not so toxic as the previous one. For all that, it still works quite well.

I'm guessing that the solid 1/4 rod keeps the saw from wandering when drilling thick material?

Sean
 
   / Drilling (or burning) large holes??? #47  
A/c pretty much works off the freon changing states (liquid to gas and back) to cool our tractors, cars and houses. They don't cool like most people think, but remove heat instead.
David from jax
 
   / Drilling (or burning) large holes??? #48  
"slowly" setting up a shop for fab.

then mentioned a very few incedental jobs needing a few holes.

then asked about a hole saw.. and mentioned the welder.

sure sounds like a recipie for a few hundred dollars of victor equipment and owner or lease bottles vs the 25$ alternative ????????

no wonder this site has the reputation for spending other peoples money at a rate faster than howitzer shells were used on the opening hours of d-day.... :)

soundguy


you know, when someone asks my opinion about what i think, then I'm allowed to say what i think.

Personally i don't consider it good financial advice to tell someone to spend $40-60 on a good carbide hole saw that he may use for a few holes, when he could spend $100 on a used cutting torch set (less bottles) that he can use for years.

when i started my company, i didn't buy the least expensive things to just get by, i bought tools that i still have and still use 20 years later. I'm glad someone told me to buy GOOD tools, not cheap crap years ago.

Now others say buy a hole saw as you need it, ok thats their advice. mine is to buy a tool that will last for years. take it or leave it. Im not trying to spend his money, rather im trying to save him money in the long run
 
   / Drilling (or burning) large holes??? #49  
I wish I could find a GOOD set of used torches for 100$.

I bought a victor style set for 150 and was as cheap as I could find without getting junk.

around here.. used torches mean 'used up' torches..

not saying your advice was bad.. I'm just pointing out that it sounds like the guy has a beer budget and is getting alot of champaign advice..

that's great when you can afford to buy expensive and have it a while..

in some cases, the money is simply not there and you have the choice of bying a cheaper tool or tool alternative to get buy, or just NOT doing the project.

i can't speak for the OP.. but I'll USUALLY choose to get my project done, even if I have to cut corners along the way to do so. In this 'real world' end results mean just as much as 'how you play the game'.

when i have the opportunity to get better tools I do so.

I ran with a cheap small set of torches for nearly 10ys till I got a decent set and decent bottles.

had I not had the cheap ones.. I bet 30% of my tractor projects would not have occured.... thus in a way.. the cheap ones were actually a good investment as they were a stepping stone / stopgap measure.

always another side of the story to look at.

with that, I'mbowing out of the conversation. it's turned into an argument match between those that think the op needs only high quality tools and anything else is bad advice.. vs the people that are giving him the exact info he asked for.

i've no time nor need to argue. I wish the OP luck in his endeavors.

soundguy
 
   / Drilling (or burning) large holes??? #50  
Sound guy I am with you

first of all buying used torches is never a good idea unless you know who they came from

second of all the OP will always make up his own mind anyway. I have a lot of really expensive tool and wish I had even more. I have bought crap bits at Canadian tire to forgoe the cost of a good bit I will use for one or two holes. My purchases are always tailored to my needs and cash flow
 

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