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Author Topic: ML's machine shop thread  (Read 317873 times)
Speeddog
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« Reply #1350 on: November 04, 2014, 07:47:04 PM »
So you're saying that Super Duplex is difficult material, but you can drill it with non-carbide drill with external coolant.
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« Reply #1351 on: November 05, 2014, 02:59:52 AM »
Quote from: Speeddog on November 04, 2014, 07:47:04 PM
So you're saying that Super Duplex is difficult material, but you can drill it with non-carbide drill with external coolant.

Yes.

I did some SD rings that got holes with counter bore for cap screws. The through hole was .406.

I got 6 holes with solid carbide. Barely.

I called my precision twist drill rep and he recommended a high performance cobalt drill. Said his software predicted 200 holes.

Yeah right, I said.

Sure enough, I got 200 holes. The drill looked a little rough but I'm actually still using it when I have need for that size.

We are basically 100% Sandvik at our shop. After this was all said and done I looked in their book and they don't even list cutting data for super duplex in the carbide drill section.

Must have been a reason.

Lesson learned. I have no fear of the stuff now that we have a solid method established.

Someone who doesn't know the material and just guesses how to run it instead of asking for help will get murdered by it.
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"The Vincent was like a bullet that went straight; the Ducati is like the magic bullet in Dallas that went sideways and hit JFK and the Governor of Texas at the same time."--HST    **"A man who works with his hands is a laborer.  A man who works with his hands and his brain is a craftsman.  A man who works with his hands, brains, and heart is an artist."  -Louis Nizer**
cokey
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« Reply #1352 on: November 05, 2014, 12:40:39 PM »
Did you ever get that big contract?  Thread went dead after that...
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Quote from: Timmy Tucker on February 27, 2011, 11:11:58 AM
About the goat...
 His name was Bob, but the family called him BeelzeBob. 
make the beast with two backs goats.
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« Reply #1353 on: November 05, 2014, 12:47:06 PM »
I did not. My customer can't get a response from the end user.

Such is life.

Got something else cooking though.
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"The Vincent was like a bullet that went straight; the Ducati is like the magic bullet in Dallas that went sideways and hit JFK and the Governor of Texas at the same time."--HST    **"A man who works with his hands is a laborer.  A man who works with his hands and his brain is a craftsman.  A man who works with his hands, brains, and heart is an artist."  -Louis Nizer**
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« Reply #1354 on: November 05, 2014, 12:49:53 PM »
Quote from: Monsterlover on November 05, 2014, 02:59:52 AM
~~~SNIP~~~

I got 6 holes with solid carbide. Barely.

I called my precision twist drill rep and he recommended a high performance cobalt drill. Said his software predicted 200 holes.

Yeah right, I said.

Sure enough, I got 200 holes.

~~~SNIP~~~

That's astonishing.
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- - - - - Valley Desmo Service - - - - -
Reseda, CA
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~~~ "We've rearranged the deck chairs, refilled the champagne glasses, and the band sounds great. This is fine." - Alberto Puig ~~~
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« Reply #1355 on: November 05, 2014, 12:53:14 PM »
Quote from: Speeddog on November 05, 2014, 12:49:53 PM
That's astonishing.

You're not kidding. After a while I stopped watching the load meter. That progressed to turning my back to the mill while it was running. That progressed to loading parts and walking away.
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"The Vincent was like a bullet that went straight; the Ducati is like the magic bullet in Dallas that went sideways and hit JFK and the Governor of Texas at the same time."--HST    **"A man who works with his hands is a laborer.  A man who works with his hands and his brain is a craftsman.  A man who works with his hands, brains, and heart is an artist."  -Louis Nizer**
hooligan machinist
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"Slightly" modified 97M750
« Reply #1356 on: November 05, 2014, 04:17:16 PM »
 Work hardening is the real issue with any stainless.
Cobalt and high speed steel drills will work wonders when you get them dailed in on the feeds and speeds.
 My rule of thumb is speed kills. Lower RPM's and higher feeds with break up chips without generating great amounts of heat.
But when it comes to 17-4 PH, All bets are off. That shit will work harden just being loaded into the machine. laughingdp
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cell # (931)-316-2020
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« Reply #1357 on: November 05, 2014, 04:22:03 PM »
laughingdp

Come on, it's not that bad.
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"The Vincent was like a bullet that went straight; the Ducati is like the magic bullet in Dallas that went sideways and hit JFK and the Governor of Texas at the same time."--HST    **"A man who works with his hands is a laborer.  A man who works with his hands and his brain is a craftsman.  A man who works with his hands, brains, and heart is an artist."  -Louis Nizer**
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"Slightly" modified 97M750
« Reply #1358 on: November 05, 2014, 04:24:36 PM »
 I've seen 17-4 PH literally untwist a drill. While being flooded with coolant. bang head
« Last Edit: November 05, 2014, 04:26:30 PM by hooligan machinist » Logged
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Monsterlover
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« Reply #1359 on: November 05, 2014, 07:19:07 PM »
Untwist?  That shouldn't happen...

Solid carbide tears it up pretty well, especially with 1000psi coolant through Smiley
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"The Vincent was like a bullet that went straight; the Ducati is like the magic bullet in Dallas that went sideways and hit JFK and the Governor of Texas at the same time."--HST    **"A man who works with his hands is a laborer.  A man who works with his hands and his brain is a craftsman.  A man who works with his hands, brains, and heart is an artist."  -Louis Nizer**
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I will save Skynet from Sarah Connor
« Reply #1360 on: November 21, 2014, 02:32:50 PM »
Back to 7 day work weeks for me for a while.

December is booked and so is most of January.

make the beast with two backs yeah!
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"The Vincent was like a bullet that went straight; the Ducati is like the magic bullet in Dallas that went sideways and hit JFK and the Governor of Texas at the same time."--HST    **"A man who works with his hands is a laborer.  A man who works with his hands and his brain is a craftsman.  A man who works with his hands, brains, and heart is an artist."  -Louis Nizer**
Monsterlover
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« Reply #1361 on: December 10, 2014, 12:42:32 PM »
Still taking on work for January!

I got orders for a couple things I didn't really want to do so I put crazy money on the jobs and still got the work.
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"The Vincent was like a bullet that went straight; the Ducati is like the magic bullet in Dallas that went sideways and hit JFK and the Governor of Texas at the same time."--HST    **"A man who works with his hands is a laborer.  A man who works with his hands and his brain is a craftsman.  A man who works with his hands, brains, and heart is an artist."  -Louis Nizer**
SpikeC
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Spike in PDX
« Reply #1362 on: December 10, 2014, 04:55:02 PM »
 I remember hearing somewhere way back when that if the customer doesn't say ouch! you didn't charge enough!
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Spike Cornelius
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Monsterlover
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« Reply #1363 on: December 10, 2014, 06:16:48 PM »
I think that's the case here laughingdp
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"The Vincent was like a bullet that went straight; the Ducati is like the magic bullet in Dallas that went sideways and hit JFK and the Governor of Texas at the same time."--HST    **"A man who works with his hands is a laborer.  A man who works with his hands and his brain is a craftsman.  A man who works with his hands, brains, and heart is an artist."  -Louis Nizer**
Monsterlover
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I will save Skynet from Sarah Connor
« Reply #1364 on: March 03, 2015, 04:31:12 AM »
Been a while since i updated.

Induction hardened hydraulic rod. We milled the flats and thread milled the center.





Hydraulic cylinder. Faced about 3/16 off the first end and bored a 20° chamfer with no support. OD turned using a live center and face plate I made.


New guy had a mishap so I get to do a turret alignment today.


Scored this awesome dial bore gage set on eBay. .057"-.800" in .0001" increments.


Aluminum-bronze thingy. Machined complete in the lathe.


14' tie rods I threaded.


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"The Vincent was like a bullet that went straight; the Ducati is like the magic bullet in Dallas that went sideways and hit JFK and the Governor of Texas at the same time."--HST    **"A man who works with his hands is a laborer.  A man who works with his hands and his brain is a craftsman.  A man who works with his hands, brains, and heart is an artist."  -Louis Nizer**
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