Machining an 8 finish in a face 0-ring groove?

Started by neurosis, November 09, 2021, 06:07 AM

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neurosis

November 09, 2021, 06:07 AM Last Edit: December 31, 1969, 04:00 PM by Guest
The big guy is looking at a quote for 10" diameter 625 inconel parts that have a face o-ring groove that requires an 8 finish.

My first thought was pass on the quote.  :lol:

Is this even possible without polishing?
I'll go back to being a conservative, when conservatives go back to being conservative.

gcode

#1
November 09, 2021, 06:11 AM Last Edit: December 31, 1969, 04:00 PM by Guest
I don't think so
Depending on how wide and deep it was even polishing would be a challenge

JParis

#2
November 09, 2021, 06:56 AM Last Edit: December 31, 1969, 04:00 PM by Guest
Hard pass...

Incogneeto

#3
November 09, 2021, 04:01 PM Last Edit: December 31, 1969, 04:00 PM by Guest
Quote from: neurosis post_id=18202 time=1636466855 user_id=49The big guy is looking at a quote for 10" diameter 625 inconel parts that have a face o-ring groove that requires an 8 finish.

My first thought was pass on the quote.  :lol:

Is this even possible without polishing?


not a chance in Hell.

Or...$1 million dollars

But if it's just one Simichrome polish is My go to.

You are gonna be there for a while so better order Lunch...And Dinner....And Breakfast.

I burned my eyes out doing 8 finishes under a microscope... Medical molds Luer Threads,Sharps and such

crazy^millman

#4
November 11, 2021, 08:21 AM Last Edit: December 31, 1969, 04:00 PM by Guest
Can it be turned? If so then use a Burning tool and call it a day.

neurosis

#5
November 11, 2021, 08:28 AM Last Edit: December 31, 1969, 04:00 PM by Guest
Quote from: crazy^millman post_id=18307 time=1636647681 user_id=152Can it be turned? If so then use a Burning tool and call it a day.


Burning tool?  You mean a burnishing tool?
I'll go back to being a conservative, when conservatives go back to being conservative.

Tim Johnson

#6
November 11, 2021, 02:08 PM Last Edit: December 31, 1969, 04:00 PM by Guest
It can be done. We use a .005 or a .010 radius end mill and take a .002" to .005" deep finish cut at about 60 sfm.
FJB

Tim Johnson

#7
November 11, 2021, 02:17 PM Last Edit: December 31, 1969, 04:00 PM by Guest
[quote="Tim Johnson" post_id=18340 time=1636668490 user_id=68]
It can be done. We use a .005 or a .010 radius end mill and take a .002" to .005" deep finish cut at about 60 sfm.
[/quote]

Edit: I just realized this is on a lathe. If you have a rigid live tooling on the lathe and enough material behind the groove the finish milling should still work.
FJB

CNCAppsJames

#8
November 11, 2021, 05:00 PM Last Edit: December 31, 1969, 04:00 PM by Guest
What are the dimensions of the groove?

First instinct is RUN!... but I need to know all the details before I expend that many calories running. :rofl:
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neurosis

#9
November 11, 2021, 06:25 PM Last Edit: December 31, 1969, 04:00 PM by Guest
Quote from: CNCAppsJames post_id=18346 time=1636678805 user_id=62What are the dimensions of the groove?

First instinct is RUN!... but I need to know all the details before I expend that many calories running. :rofl:


lol.  I think that he passed on that one.  It's too expensive of a part to roll the dice on a "maybe we can hit that finish".
I'll go back to being a conservative, when conservatives go back to being conservative.

neurosis

#10
November 13, 2021, 06:36 AM Last Edit: December 31, 1969, 04:00 PM by Guest
I never question the Ronaldo.  I just question whether he made a typo or is talking about something I've never heard of.  :D
I'll go back to being a conservative, when conservatives go back to being conservative.

crazy^millman

#11
November 22, 2021, 08:52 AM Last Edit: December 31, 1969, 04:00 PM by Guest
Quote from: neurosis post_id=18308 time=1636648126 user_id=49
Quote from: crazy^millman post_id=18307 time=1636647681 user_id=152Can it be turned? If so then use a Burning tool and call it a day.


Burning tool?  You mean a burnishing tool?


Burnishing tool sorry about the typo, but with the wrong tool you could set it on fire and have a burning tool so there is that.  :lol:  :w00t:  :rofl:

QuoteYou should know by now to not question Ronaldo.
Over the years, he's burnt many tools in many situations
 :whistle:  :whistle:

Guilty as charged. Put a nice pocket through a part the other day in a hurry. Luckily it was a scrap part so no harm no foul. I tell every person I give a program to always be cautious when first running any program. No code is 100% until it has been run through the machine. I could have CAV it and everything, but still not 100% until been run and tested on the machine.


QuoteI never question the Ronaldo. I just question whether he made a typo or is talking about something I've never heard of.


Please do I am no one special.  :no:  :no:
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