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Recent content by Ebug

  1. Ebug

    End Mill Jamming in Aluminum during CNC milling Attempts

    DominicASP Almost every prefabbed aluminum box I have had the pleasure of machining is made of really soft material. Soft equates to gummy. I was not able to tell from your post but is the tool getting gummed up with aluminum? If yes...try switching to a non Tin coated tool. Tin coated...
  2. Ebug

    Newbie - Need Feedback on my first CNC Milling attempt

    I have not looked at the photos yet, but I will comment on your machining parameters. A carbide endmill in Aluminum should run anywhere from 800-2000sfm. You are probably going to run out of spindle rpm long before you hit that sfm. Let's work an example using 160sfm. 160sfm .0625" diameter...
  3. Ebug

    Need help interpreting BAC finish codes

    I would agree completely if the contract actually addressed this. This particular contract is for an assembly and does not address anything to do with the detail components within the assembly. Rob
  4. Ebug

    Need help interpreting BAC finish codes

    Hello gentlemen. I need some help. I recently change employers and have come to realize that the way my previous employer taught me to interpret BAC finish codes might not have been correct. Both employers are DoD contractors and this question applies to DoD work only. Aicraft owned by the...
  5. Ebug

    Proper callouts for heat treating 4340

    I am definately out of my league when it comes to metalurgy...and I do not want to step on anyones toes...but from where I am sitting, it looks like your minimum hardness requirement is barely achievable with a perfect process with 4340. According to AMS-H-6875, 4340 can reach 200-220 KSI...
  6. Ebug

    Dimension changes on E9310 Carburized parts

    Hi guys, I am working on a gear blank made from E9310 per AMS-6265 that is going to be Carburized on the exterior gear teeth. All surfaces, with the exception of the teeth flanks, are going to be copper plated. The core hardness is going to be 180-210ksi. My question is, does this material...
  7. Ebug

    5 axis machining

    If you want to learn how to use either the CATIA or UG....here is an affordable source. www.myigetit.com As far as learning 5 axis programming, well my friend, you just have to do it. Working for a shop that actually has a 5 axis helps. Good luck.
  8. Ebug

    Machining aluminum

    I am not sure if you solved your machining problem yet, but I have some input just the same. 6061 is a very gummy aluminum in comparison to 2024, 7050, or 7075, the three of which machine very nice. In 6061 you should limit it to about 2000sfm, 1/2D DOC for slotting, and chip load is based on...
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