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Any project in metal or alloy / Re: 3" vise
« Last post by 4GSR on Today at 10:00:05 AM »
Drill rod in 3 foot sticks is always annealed.  Drill blanks are harden.  Even in the annealed state, it can be tough to cut.  It's in the high 20's on Rockwell hardness.
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General Shop discussions / Re: End mill sharpening service
« Last post by 4GSR on Today at 09:57:27 AM »
Now days, the money is in resharpening carbide endmills.  At least i was told this a couple years back when
i was doing some resharpening in 2014-2015.  The CNC grinding machines were devoted to grinding carbide, the only way you could get HSS end mills sharpen is if you had 25, 50, or more of one size, all had to be the same, for them to touch HSS.  Got to remember, Houston is different from the rest of the USA.  It's a whole different business atmosphere there in the way of machine shops.  Shops will scrap HSS before they will send out to resharpen.  Most every HSS cutting tools have been replaced with carbide or PDC.  Don't get me wrong, they still use HSS but in small volume.
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General Shop discussions / Re: milling feeds and speeds.
« Last post by woodchucker on Today at 09:01:24 AM »
I don't do feeds and speeds, I just go by feel.
but, I think you'll find this is a good little speed and feed calculator.
https://littlemachineshop.com/mobile/speeds_feeds.php
Little Machine provides a bunch of calculators. See the calculator menu on that page.
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Photos of general interest (not machines and shop) / Re: Picís
« Last post by dlane on Today at 07:58:17 AM »
Havenít been in the shop for a while . Someday
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General Shop discussions / Re: milling feeds and speeds.
« Last post by Carpenter84 on Today at 07:31:20 AM »
That slide rule isnít just for niagara tools. Itís generalized info. And it has a ton of useful numbers on it. Surface speeds, rpms, feed rate, chip load, conversions, hardness scales. Mine is by my mill and I use it all the time. Slide the card pointer over to my end mill size, and the desired surface speed, and it tells you lots. And itís robust, even I wonít wreck it. Came with a plastic sleeve. Fill it out and get one. Dooooo it.

I didnít bother with cell phone apps. I generally try to keep my phone far away from cutting. I keep ruining phone ear speakers with swarf. My good phone is still in repair because of that. (they accidentally broke the screen in the process... sucks to be them... )
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Looks like the crate is her next best option. Got to love Trump he keeps shoveling it right back at these folks.
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General Shop discussions / Re: milling feeds and speeds.
« Last post by pep on Today at 06:56:02 AM »
Shawn,

Good formula X 4 see nothing wrong with the thinking, accuired what ya were after. Thanks for the link, I have a few Niagara end mills 3/4 9/16 & 1/2 good stuff.

Did find a cell phone app last night. Two thumbs down, to small, to much scrolling. Imagine a Starrett wall chart only offered for a cell ......... nightmare come to mind.

The card type looks perfect, seems much more user friendly from the get go.

Again
Thanks

Pep
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General Shop discussions / Re: End mill sharpening service
« Last post by ddickey on Today at 04:27:33 AM »
Why is that Ken? About not being Carbide.
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Any project in metal or alloy / Re: 3" vise
« Last post by Carpenter84 on January 18, 2019, 11:40:25 PM »
Since I have most of the profile hogged out. I ground almost all of the surfaces including the slots so the jaw will move nice and smooth. I just have the throat of the vise to grind yet.

I also have some 3/4Ē drill rod on order and trying to track down some #6 taper pins. The taper reamer I have is a #6.

Now, when you buy drill rod, is it prehardened? I bought w2 water quenched. It was a tad cheaper than o1 oil. But does that mean itís already hard or that it is supposed to be a water quenched if I do harden it?
If itís already hard, Iíll need to anneal it as that reamer is only hss.
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General Shop discussions / Re: milling feeds and speeds.
« Last post by Carpenter84 on January 18, 2019, 09:59:28 PM »
I set up a test. Set my table far left. Zerod the dro, set my stop watch on my phone, pressed go on both. 30 second test, doubled my result. Wrote it down. My #9 may be off, could only do 15 seconds due to the table running out, multiplied by 4. Lol.


Niagara slide rule.
https://www.niagaracutter.com/speed-feed-slide

Fill it out, theyíll send you one. Very handy.
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