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  1. Tin Falcon

    Drill Sharpeners

    The several links have good diagrams . Do not remember off hand IIRC primary is the cutting angle secondary is relief. Tin
  2. Tin Falcon

    Drill Sharpeners

    If you google 4 facet drill sharpener you will find lots of pics. This site has lots of info the grinder was a build in the Home Shop machinist mag. http://www.gadgetbuilder.com/DrillSharp.html You may also want to look at harold halls page. http://www.homews.co.uk/page354.html And...
  3. Tin Falcon

    Tensile tester.

    Maybe something like this to start with then add a motor later. tin
  4. Tin Falcon

    Tensile tester.

    CHP yes I saw that one. A bit overkill for plastic. I would like something that will throw a pair of graphs on a computer screen. whiskey for the price of water maybe. I think it is doable just need to find the right combination of hardware and software. I have an old dataq DI194RS...
  5. Tin Falcon

    Tensile tester.

    Does anyone here have experience with or know a good link to a simple INEXPENSIVE shop built tensile tester that would be suitable for testing test blanks generated by a 3d printer ?? I have consulted the almighty GOOGLE with less than satisfactory results. I have seen and downloaded...
  6. Tin Falcon

    Drill Sharpeners

    For those who are interested I am attaching the link to the Tormek DB22 sharpening jig manual.. FYI I am using mine on a german engineered Scheppach 2500 that is about half the cost of a tormek. Reading it it may seem complicated. But one you understand the steps it goes quite easily and does...
  7. Tin Falcon

    Milling feed

    Most of us are Seat of the pants machinist in that few have a rpm gage on the machine . I do have a speed pot and hand tach if I want or need to. When hand feeding feed chip load is by feel . DOC I measure with a dial indicator. So unless you have a cnc the numbers are just a target. My...
  8. Tin Falcon

    Milling feed

    Speed = rpm of spindle Feed Inches per minute or inches per revolution of the tool in thousands f an inch This determines the thickness of the chip. The chip thickness needs to be such that the heat from the cut goes with the chip. you want minimum heat retained by the tool or the material...
  9. Tin Falcon

    Drill Sharpeners

    I too learned to free had sharpening drill bits and lathe tools in trade school. At the tender age of 36. I guess the bottom line is either pay in time by learning to sharpen freehand or pay in money to get a sharpening rig of some sort. the drill doctors and the tormek do take time as well...
  10. Tin Falcon

    Milling feed

    Speeds and feed should be the same for any machine depth of cut needs to be reduced for smaller machines,
  11. Tin Falcon

    Drill Sharpeners

    Doesn't the EE jig do drill bits as well ??? Tin
  12. Tin Falcon

    Drill Sharpeners

    IMHO drill sharpeners that really work and do a good job are rare and expensive. hand grinding works but takes practice finesse etc. I have one of the older DD500 drill doctors It does the job. A new top of the line drill doctor will run about $ 120 -15 depending on where you buy . The...
  13. Tin Falcon

    Windows shopping for 3-D printer.

    Ok I am just slightly jealous, well maybe a lot. It does look like a nice printer. The SD 4is doing fine pretty much stock and I have been printing a lot with the FT prusa 2020. The FT5 is what I have dreamt about more or less.. And congratulations on another printer. Tin
  14. Tin Falcon

    Windows shopping for 3-D printer.

    If the price of 3d printers goes the way of laser printers the price will drop. I had a laser printer years ago the price was a grand for a whopping 300 dpi resolution I saw a laser on sale the other day for a hundred. Tin
  15. Tin Falcon

    Windows shopping for 3-D printer.

    New Folger tech FT-5 Kit 300 x 300 x 400 build area linear rails MKs 1.4 controller, 2004 lcd standard . I am so tempted . $499 + sh https://folgertech.com/collections/3d-printer-full-kits/products/folger-tech-ft-5-large-scale-3d-printer-kit I have been pondering a scratch build but this...
  16. Tin Falcon

    Plastic gears 3D printed

    I feel a caveat is in order here. : While it is in deed fast and easy to create a gear prototype with a 3d printer to create a fully functional gear the right material needs to be used and of course some care in printing. The right material is nylon , see below and of course one needs a 3d...
  17. Tin Falcon

    Small Oscillating engine with gear box.

    Well just maybe you can get the grand kids to print you some gears. It is quite easy. I started a thread here as to not side track this one.Plastic Gears Thread Tin
  18. Tin Falcon

    Small Oscillating engine with gear box.

    Another fantastic build tony thanks for sharing. Tin
  19. Tin Falcon

    Plastic gears 3D printed

    Bob: thanks for the link. I bookmarked the page. Both very good points Tin
  20. Tin Falcon

    Plastic gears 3D printed

    well I will not even attempt to argue that statement. The original intent of 3d printing was never mass production . It was intended as a rapid prototyping process. a 3 dimensional sketch one can touch hold look at at any angle and even check dimensions and fit to another part or parts...
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