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Campfire Oracle
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Campfire Oracle
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I virtually never use lubricant when milling aluminum. Two flute endmills stay cooler and not as prone to load up as multi flute endmills,...so I only use 2 flute endmills on aluminum.
Also, I usually save .002" for a clean up cut then climb mill it off. In fact, that's a habit of mine with pretty much any material I mill. Climb milling the final .002" or so causes the endmill to throw the chip behind it instead of pushing them off in front of the flute,....turn the spindle speed up and creep across it slow,...leaves a very fine finish. That will work on a Bridgeport... Running a CNC mill I'm pushing 150~200 surface feet with a good cobalt four flute endmill at .02"~.024" per rev feed rate. That would be running a 1/2" endmill 1200rpm @ 29" of feed, 75% depth of cut, 75% side engagement. All climb milling, .005" finish stock on the side and .01" on the floor. I've got to get those chips out of the way using coolant blast. Recutting chips kills a cutting edge. Yeah,...the CNC milling centers I've ran are flooded with coolant continuously.
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Joined: Dec 2002
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Campfire Outfitter
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Cheap and available
WD-40 for Aluminum A LOT more expensive than Jet A
NRA Benefactor Member
Those who live by the sword get shot by those who don't.
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Joined: Apr 2010
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Campfire Outfitter
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Campfire Outfitter
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Cheap and available
WD-40 for Aluminum A LOT more expensive than Jet A Never heard of it
Maker of the Frankenstud Sling Keeper
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Campfire Ranger
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Campfire Ranger
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Cheap and available
WD-40 for Aluminum A LOT more expensive than Jet A Never heard of it Jet engine fuel. Kerosene based...
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Joined: Dec 2002
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Campfire Outfitter
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A cheap source of Kerosene.
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Those who live by the sword get shot by those who don't.
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Campfire Tracker
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Campfire Tracker
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All the answers are here, Slow, steady pressure, lubricate, and use the right drill bit which is a Marginless bit.
If you are stuck on using standard Margin bits well wrong tool for the job. For home or most industries a margin less drill isn’t needed. Drags the hole, creates more heat in a home drill press Don’t have the rigidity and straightness of a CNC. Larger drills all have margins. Drag and lock a lot easier with out the margin. That is complete BS. We hand drill C/T holes all the time! Not total BS. Why do all large twist drills have margins?
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Campfire Outfitter
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All the answers are here, Slow, steady pressure, lubricate, and use the right drill bit which is a Marginless bit.
If you are stuck on using standard Margin bits well wrong tool for the job. For home or most industries a margin less drill isn’t needed. Drags the hole, creates more heat in a home drill press Don’t have the rigidity and straightness of a CNC. Larger drills all have margins. Drag and lock a lot easier with out the margin. That is complete BS. We hand drill C/T holes all the time! Not total BS. Why do all large twist drills have margins? They don't! Why does every aircraft manufacturer and their engineers call out for Marginless drills on stainless C/T holes? I guess you know more then they all do!
Eat Fish, Wear Grundens, Drink Alaskan.
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OP
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I ended up ordering the Drill Hog® HI-Molybdenum M7 21 Pc Index w/ lifetime Warranty.
I decided to go with the Molybdenum for increased durability since these bits will mostly be used in a hand drill.
Thanks to everyone for their input.
l told my pap and mam I was going to be a mountain man; acted like they was gut-shot. Make your life go here. Here's where the peoples is. Mother Gue, I says, the Rocky Mountains is the marrow of the world, and by God, I was right.
- Del Gue
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Please educate me on Margin/Marginless drills (bits) - I'm not sure what this term refer to - is it the little barbs that are sometimes found on the edges of the cutting face? & what are they useful for? Thanks.
Also, any opinion on Tap Magic Cutting Fluid?
Last edited by High_Noon; 03/31/20.
l told my pap and mam I was going to be a mountain man; acted like they was gut-shot. Make your life go here. Here's where the peoples is. Mother Gue, I says, the Rocky Mountains is the marrow of the world, and by God, I was right.
- Del Gue
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Tap Magic is ok.
Marginless bits AKA Stovepipe, Gun barrel bits are drill bits with out Margins, Margins are the fluted part of the drill bit and are sharpened. Marginless are not sharpened. They also have a very shallow cutting angle. They cut stainless like a normal bit cuts T6. They also do not grab so they are also used in drilling holes on or near existing holes when doing repairs. They ain't cheap!
Eat Fish, Wear Grundens, Drink Alaskan.
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Campfire Outfitter
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Boelube and the right speed drill and bit works wonders.
Eat Fish, Wear Grundens, Drink Alaskan.
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Campfire Outfitter
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OP
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l told my pap and mam I was going to be a mountain man; acted like they was gut-shot. Make your life go here. Here's where the peoples is. Mother Gue, I says, the Rocky Mountains is the marrow of the world, and by God, I was right.
- Del Gue
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Joined: Jun 2008
Posts: 13,357
Campfire Outfitter
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Eat Fish, Wear Grundens, Drink Alaskan.
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Campfire 'Bwana
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Campfire 'Bwana
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Hey, feeling your pain. I phucqked through a 29pc set of those Ti Warrior (HF) bits the other day to simply drill five 1/2" holes in some 1/4" iron. Good gawd it was not fun! Got my $13 worth of misery! Que Kingston....
"I can't be canceled, because, I don't give a fuuck!"
--- Kid Rock 2022
Holocaust Deniers, the ultimate perverted dipchits: Bristoe, TheRealHawkeye, stophel, Ghostinthemachine, anyone else?
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Campfire Tracker
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Boelube and the right speed drill and bit works wonders. Well we agree on something..........as you could see from my previous posts. Bigger drills all have margins that I see. Heck. Anything over 1” I think anyway. All the ones in the drawers do A margin less drill is not always wrong. This is home owner But aircraft rivets.......sure. But this isn’t aerospace And me..........10 years in aerospace fasteners...Cherry Rivets.
Last edited by 257_X_50; 03/31/20.
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Campfire Oracle
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Campfire Oracle
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Campfire Outfitter
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Boelube and the right speed drill and bit works wonders. Well we agree on something..........as you could see from my previous posts. Bigger drills all have margins that I see. Heck. Anything over 1” I think anyway. All the ones in the drawers do A margin less drill is not always wrong. This is home owner But aircraft rivets.......sure. But this isn’t aerospace And me..........10 years in aerospace fasteners...Cherry Rivets. You ain't drilling a hole that size specially not if it is a CT. You use a step reamer. Marginless bits are not for drilling rivets! They are for drilling Stainless, CT, and holes in and around other holes! Cherries are sh_t. The ONLY time I will use a Cherry is if it is totally impossible to get a solid in there and a Huck is not appropriate. !0 years wow I guess I should be impressed? I been playing this game for three times as long as you. I don't care who the end user is, if they are looking for the right tool for the job, I gave them the correct answer.
Eat Fish, Wear Grundens, Drink Alaskan.
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Campfire Outfitter
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in the right application yes.
Eat Fish, Wear Grundens, Drink Alaskan.
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Campfire Oracle
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Campfire Oracle
Joined: Oct 2005
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in the right application yes. What's a wrong application?
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Campfire Outfitter
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Tight quarters would be one. They don't preform well on 90 and 45 degree terry drills. They require a pilot. In and around existing holes. On a drill press, or in a machine they work best.
Eat Fish, Wear Grundens, Drink Alaskan.
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