Drill bits for metal and using them properly

[Rich Fife]

At work I am not showing anyone anything anymore!
These last couple generations are too cocky to bother with, no work ethics, no practical knowledge.
Also, I am at odds with my superiors and as such helping the new guy equals helping my overpaid superiors benefiting from it.
Sorry new guys, call Your superiors and let them show You that they know less than You do!

I know it sounds harsh, but I am sick and tired of being exploited (at my current workplace of 26 years).

Holy *s-word man... this must ring true all over this country!
I try to show the new guys... but, like you said, they know everything and holy fawk are they cocky... and expect everything for nothing but want to get paid more than the guys who know their *s-word.
We live is strange times... I have 3 boys, they all can run a lathe and mill, weld... etc... be it may not look the greatest, but, they have a baseline understanding... we as a country need to start pushing Trade Schools Hard otherwise future generations will be lost with liberal arts and basket weaving-101 degrees... wondering why they can't find a job.

 

[Squareground3691]

NICE!!! In my early 20's I couldn't stand sharpening drills, endmills, shl mills, cemented carbide turning tools... now that my brain has slowed... I find it almost therapeutic in the sense that I get lost in the process and the next thing I know I times traveled ahead a few + hours.

The old days of making split dies , for a progressive tool tool , and jig grinding , have been taken over by wire EDM’ s and button pushers, who don’t care much about anything .

 

[Squareground3691]

"My Deckel" at work, I hate running that machine, heavy dual doors, biggest and heaviest workpieces (manual loading).

I wonder whether it is the same "Deckel" manufacturer, or at least the evolution from Your Deckel.

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German

 

[fossil]

I don't know if any of you guys use cutting oil for drilling but I find this stuff works well on steel. It keeps the drill cool and cutting well.

Monroe Cool Tool II 19020 4 Ounce Cutting & Tapping Fluid - SB Simpson Group

68-20254 Monroe CoolTool II Cutting Tapping Fluid 19020 4Oz Cool Tool 4 Ounce Ounces 2049.00771 003-1-004 2049.00771 MNR-COOL-TOOL MONCTII4OZ

sbsimpson.com

 

[Rich Fife]

I like Tap Magic, AlumaTap, heavy dark cutting oil and Kerosene when not using the cncs... for cncs I like Val cool.

 

[Squareground3691]

I don't know if any of you guys use cutting oil for drilling but I find this stuff works well on steel. It keeps the drill cool and cutting well.

Monroe Cool Tool II 19020 4 Ounce Cutting & Tapping Fluid - SB Simpson Group

68-20254 Monroe CoolTool II Cutting Tapping Fluid 19020 4Oz Cool Tool 4 Ounce Ounces 2049.00771 003-1-004 2049.00771 MNR-COOL-TOOL MONCTII4OZ

sbsimpson.com

Yea , that works , good on stainless,

 

[Rich Fife]

I don't know if any of you guys use cutting oil for drilling but I find this stuff works well on steel. It keeps the drill cool and cutting well.

Monroe Cool Tool II 19020 4 Ounce Cutting & Tapping Fluid - SB Simpson Group

68-20254 Monroe CoolTool II Cutting Tapping Fluid 19020 4Oz Cool Tool 4 Ounce Ounces 2049.00771 003-1-004 2049.00771 MNR-COOL-TOOL MONCTII4OZ

sbsimpson.com

Beeswax works good too.

 

[calcutta250]

I don’t feel like we should neglect the younger generation. They will soon find humility and remember the words “that wise man once told me”.

 

[Wilhelm]

High quality drill bit, very durable and well contoured cutting edges, Solid-Carbide

 

[Wilhelm]

High quality drill bit, but quite shatter prone and the cutting edges dull a bit faster compared to the aforementioned bit, Solid-Carbide

 

[Wilhelm]

HSS-Co drill bit freehand ground by me, 12.0mm OD so it doesn't quite fit within the "UNO" camera view field.
Wheel wasn't too good missing a sharp corner, hence the resulting mediocre "cross cut".
Was intended to be a spot drill, as such the cutting edges are ground at a steeper angle (~90°) and the relief is quite extreme.
I liked the result I got, but in the end it didn't get used as the workpiece proved to be too big for the mill.

 

[Rich Fife]

High quality drill bit, very durable and well contoured cutting edges, Solid-Carbide

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I never used this brand... but, I have and continually use Guhrings. My drills and taps last a Very long time and I basically cut everything. From zinc, copper, various aluminums, plain carbons to high carbon, various tool steels, various grades of SS, once in a while inconel as well as various grades of Titanium.
Like anything... Speeds, Feeds/chiploads and rigidity... they all dictate how long bits/cutters last... We all know cutter geometry, the hardness of the bit being used, the ability of the bit to retain the cutting edge when operating at elevated temps as well as wear resistance at those elevated temps are crucial, but they all fall back to speeds, feeds/chiploads and rigidity. If someone spins up their bit and it exceeds the red heat range, it's obviously going to fail... if the setup isn't rigid, it's going to fail, shock loading carbide and/or cobalt, it's going to fail... I have guhring taps and drills that I have been using for a couple years now... I have definitely gotten my money worth out of them? I've had such good results that I don't even entertain the idea of swapping brands, changing geometry etc... I am budgeted "x" amount for expendable tooling... soooo needless to say, my box is filling up with Guhrings.
I need to try and use the Parlec to get detailed images of the cutting edges of my old bits and then compare them to the new bits.

 

[Serioussam]

This stuff works amazing, saves drill bits, sawzall blades and grinder disks

 

[Wilhelm]

WiDia Solid-Carbide deep hole drills, 1/2" (12.5mm) OD, total 10" long, with coolant channels in its flutes.

 

[Wilhelm]

20mm deep thread all cut in one go without reversing the tap to break the chip.
Beautiful!

Metric M8x1.25mm

 

[fredx]

................

 

[Wilhelm]

Bumpity ...

1/2" HSS-Co drill bit, from poorly sharpened to sharp, freehand & eyeballed ground







Yes, that is ONE drill bit ground in three steps: cutters, crosscut, 4-corner

 

[Stump Shot]

Bumpity ...

1/2" HSS-Co drill bit, from poorly sharpened to sharp, freehand & eyeballed ground

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Yes, that is ONE drill bit ground in three steps: cutters, crosscut, 4-corner

Nice job of it! I can picture the nice curly chips coming off some metal just from the looks alone.

 

[dangerousatom]

YES I hand grind my drill bits too, use a 4" diamond wheel on a right angle grinder that setup permanent just for it. My Grandfather who was a machinist foreman in the mid 50s-80s tough me. He worked for the Co who made the 1st injection molds for the plastic Coke bottle.....he did some crazy cool stuff.

BTW.....Drill Dr sharpening tools SUCK!

 

[lehman live edge slab]

YES I hand grind my drill bits too, use a 4" diamond wheel on a right angle grinder that setup permanent just for it. My Grandfather who was a machinist foreman in the mid 50s-80s tough me. He worked for the Co who made the 1st injection molds for the plastic Coke bottle.....he did some crazy cool stuff.

BTW.....Drill Dr sharpening tools SUCK!

Yes still doctors aren’t great, diamond wheel not the appropriate wheel for a lot of standard drills ect. Regular fine stone that’s well dressed is all you need on a bench grinder for average bits.