From a 3.250" long piece of 3" 6061-T6 Aluminum round bar, turn complete, a Coaxial Indicator Holder

• For the first operation, turn accurate diameters and lengths for each step on the part

  • Follow the Coaxial Indicator Holder Technical Drawing pictured below for target dimensions and tolerances

  • Recommendation: Don't shoot for your target dimensions right away - shoot instead for dimensions that are larger until you can consistently turn diameters/lengths to tolerance

• Spot, Drill, and Ream the center bore to dimension/tolerance

• Ensure all sharp edges are broken/deburred

• For the second operation, flip the Coaxial Indicator Holder and turn all the features on the back side of the part

  • It is recommended to face the part to its Overall Length (OAL) before making other features

  • Turn down the back half of the part following the blueprint

    • Rough-in the radius using a standard turning tool to do the Step-Turning method

  • Use the custom HSS 0.250" Radius form cutter from Checkpoint 3.1 to finish turning the radius to dimension/tolerance

  • Ensure all sharp edges are broken/deburred

  • On a manual Mill, locate, Spot, Drill, and Tap the set screw hole to dimension/tolerance

Once done, create a "Coaxial Indicator Holder" project page on your portfolio website, and upload documentation your progress (text/pictures/gifs/videos), including:

• The starting material ("before"), dialed-in on a 4-Jaw Chuck

• Making all the steps on the holder

• Making the precision bore on the holder

• The Part when Op1 is completed ("after")

• The starting point of Op2 ("before"), dialed-in on a 4-Jaw Chuck

• Turning all the features on the 2nd end of the part

• Using a Mill to make the set screw hole/thread feature

• The finished part when Op2 is completed ("after")

• Descriptions/summaries of what you did/learned