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I like "butter cut" cutting fluid for big holes. Not really because it's better, just because it smells like hot melting butter when it burns off a hot bit. Makes me want a BLT with extra bacon.
I have to wonder what the possibility is that you may damage or ruin the tank?
A 6 inch hole saw mounted in a hand drill is going to be a brutal experience!
I agree with others that you should just take the tank to a shop with water jet or lazer cutting service and let them do the work..
pg
Dynasty 200 DX_set up on 3 phase
Coolmate 3
MM 251 w/ Spoolmatic 30A
HTP 625 Micro Cut Plasma Cutter
Victor O/A Rig
Bridgeport Mill_3 phase (w/ Acu-Rite 4 axis DRO)
10 inch South Bend Lathe_3 phase
Baldor Double Cup Tool Grinder_3 phase
Baldor 10 inch Buffer
Rockwell 12 inch Disc Sander
Cyclone 2ft X 3ft Bead Blast Cabinet
Quincy 325 2stg- Air Compressor_3 phase
Graymills Built-in Parts Washer
Rockwell/Delta Planer, HD Shaper, Uni-Saw etc.
I have to wonder what the possibility is that you may damage or ruin the tank?
A 6 inch hole saw mounted in a hand drill is going to be a brutal experience!
I agree with others that you should just take the tank to a shop with water jet or lazer cutting service and let them do the work..
pg
Dynasty 200 DX_set up on 3 phase
Coolmate 3
MM 251 w/ Spoolmatic 30A
HTP 625 Micro Cut Plasma Cutter
Victor O/A Rig
Bridgeport Mill_3 phase (w/ Acu-Rite 4 axis DRO)
10 inch South Bend Lathe_3 phase
Baldor Double Cup Tool Grinder_3 phase
Baldor 10 inch Buffer
Rockwell 12 inch Disc Sander
Cyclone 2ft X 3ft Bead Blast Cabinet
Quincy 325 2stg- Air Compressor_3 phase
Graymills Built-in Parts Washer
Rockwell/Delta Planer, HD Shaper, Uni-Saw etc.
I have a magnetic drill and I swear by them --- used to slug around the Milwaukee with Lenox hole saws and more often than not they'd turn out rougher than planned.
Depending on the stainless, the magnetics may or may not work. There is nothing cleaner than a good magnetic drill with annular bits.
ESAB TIG 252 with Miller CoolMate
Spectrum 875
Diversion 180
Oxy-A (Harris, ESAB, Ox Weld)
Miller 252
MM 211
CST 280
Trailblazer - Kubota
The curved surface in .060 thousands stainless is your first problem with using a large hole saw.........as you'll only be cutting the curve first which will increase the chances of the hole saw catching the material as it bores in........Rotor broaches would also be fine if the material was flat..........burning on .060 material may warp it , but I guess if it's going to warp the tig welding well also do the same...........
On .060 I might just take a cobalt drill bit say 1/8" or smaller and make a circle off your pattern.......and then finish the circle with a drum sander or a 1/8" High speed burr...........might be a little slow but at least you have control over the ending results.
This thread would be much more helpful if one could easily post pics.......what a freekin' joke
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Miller Dynasty 700...OH YEA BABY!!
MM 350P...PULSE SPRAYIN' MONSTER
Miller Dynasty 280 with AC independent expansion card
Miller Dynasty 200 DX "Blue Lightning"
Miller Bobcat 225 NT (what I began my present Biz with!)
Miller 30-A Spoolgun
Miller WC-115-A
Miller Spectrum 300
Miller 225 Thunderbolt (my first machine bought new 1980)
Miller Digital Elite Titanium 9400
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