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Thread: HOMEMADE RIFLING MACHINE (Free plans and new idea!)

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    Supporting Member AB-SHOP's Avatar
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    HOMEMADE RIFLING MACHINE (Free plans and new idea!)



    Hi everyone,

    This is my latest video: I decided to make a little dream come true, a challenge started as a bet a few years ago, when a friend told me that with the standard parallel lathe you can't make a pitch as large as the typical 1:250 (mm) of the internal rifling of a firearm (1 turn in 250 mm) or in any case you go beyond the metric/inch values (6 mm as a maximum for example): I don't want to build a weapon (Obviously) but winning the bet YES!

    The new idea that made me decide to attempt the challenge is that the idle joint "releases", separates the linear advancement but not the axial one, which is made by a cam that anyone can design and print at home: the cylinder of the joint is welded to the M12 screw that passes into the nut of the lathe spindle, the axis instead of the central shaft rotates idly inside the bearings of the joint.

    The Cam pitch can be customized with a 3D printer, you can change it as you prefer, forces that arrives to the cam curve are very small.
    As you see, on the same axis (the lathe axis!) there are a pitch of 1.75 mm (M12) and a pitch of 250 (mm) (pitch of the plastic cam 1 turn in 250 (mm), so not 1 complete turn anyway because my lathe is short, but with a larger lathe you can reach larger dimensions/longer barrel and the pitch remain the same,1 turn in 250 mm, so in my case I can make a part of the 250 mm pitch, with a barrel of 250 mm you can develop the 250 mm)

    Hope you liked it,
    Alberto
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  2. The Following 9 Users Say Thank You to AB-SHOP For This Useful Post:

    bjolate (Mar 2, 2024), Canyonman44 (Feb 27, 2024), Jon (Feb 26, 2024), mr mikey (Mar 4, 2024), Nitrous (Feb 27, 2024), nova_robotics (Mar 2, 2024), Resident114 (Mar 4, 2024), tonyfoale (Feb 27, 2024), Tonyg (Feb 27, 2024)

  3. #2
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    Thanks AB-SHOP! We've added your Rifling Machine to our Firearm and Weaponry category,
    as well as to your builder page: AB-SHOP's Homemade Tools. Your receipt:




    2000 Tool Plans

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    Clever combination of old and new technology!
    Thanks for sharing it.
    Doug

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    Supporting Member AB-SHOP's Avatar
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    Thanks Doug, it was what i want to do, the old and new together with a new idea (the idler joint)

    A big Ciao from Italy Doug,
    Alberto

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    Supporting Member Canyonman44's Avatar
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    Sir, At around 3:31 you use a cutting fluid that "sticks" as opposed to being thrown all over me and the shop. Could you tell me what you are using please? Thanks Ken

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    Supporting Member AB-SHOP's Avatar
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    Good morning Ken and thanks for your question: if I understand correctly you are referring to the white liquid that I use on the round surface of the central shaft being worked on, in this case it is cutting oil that I put inside the plastic container and "stretch" it with water, so I make the classic “emulsifiable oil”;

    it remains on the surface of the rotating piece precisely because there is oil in that white liquid;

    I hope the question was related to this, otherwise let me know, I'll be happy to answer!

    Ciao !
    Alberto.

  8. The Following User Says Thank You to AB-SHOP For This Useful Post:

    Canyonman44 (Mar 3, 2024)

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    Congratulations AB-SHOP - your Rifling Machine is the Homemade Tool of the Week!

    This is a very clever use of 3D printing to do cut rifling on a lathe.

    Some more good builds from this week:

    Composite Mould by tonyfoale
    Motorized Mill Z-Axis by cales2021
    Mini Mill Vise by Improvised DIY
    Cylinder Dolly by orioncons36
    Circular Saw Guide by RCTURKA
    Bench Grinder by h7eh7e

    AB-SHOP - you'll be receiving a $100 cash prize, in your choice of Amazon, PayPal, or bitcoin. Please PM me your current email address and prize choice and I'll get it sent over right away.

    This is your 8th Homemade Tool of the Week win. Here are all of your Homemade Tool of the Week winning tools. Congrats again


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    Supporting Member Canyonman44's Avatar
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    Mr AB. Yes, that is it! What ratio of water to cutting oil?? TIA Ken



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