Howell V4 from Italy

Discussion in 'A Work In Progress' started by Foketry, Mar 17, 2019.

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  1. May 5, 2019 #21

    Foketry

    Foketry

    Foketry

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  2. May 5, 2019 #22

    petertha

    petertha

    petertha

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    Very impressive, thanks for sharing
     
  3. May 14, 2019 at 10:58 PM #23

    Foketry

    Foketry

    Foketry

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    After the connecting rods and pistons now the camshafts .
    I milled the cams in 2 + 2 pairs , heated in oven and hardened in water
    I put them in phase through the 4 axis of my DIY cnc machine, then fixed with Loctite.
     
    Last edited: May 14, 2019 at 11:07 PM
  4. May 14, 2019 at 11:02 PM #24

    Foketry

    Foketry

    Foketry

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  5. May 16, 2019 at 1:33 AM #25

    bluejets

    bluejets

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    I do similar only I make allowance for and fit a 1/16" roll pin in each before cutting/grinding the cam pair just to be sure it's not going to go anywhere.
    Do the machining, remove the pin, remove and harden the cam, then polish and refit with a new pin.
    Don't trust loctite alone.
     
  6. May 16, 2019 at 10:42 AM #26

    Foketry

    Foketry

    Foketry

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    I agree with you, but in this case the gluing surface is a long cylinder
    I cleaned shaft and hole with acetone and I use high strength Loctite for high temperatures (620)
    In case of single cam I use roll pin
     
  7. May 16, 2019 at 11:39 PM #27

    bluejets

    bluejets

    bluejets

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    You can use whatever argument to justify how you do it, still the fact remains.
    As I said before, I use the same approach but use pins.
    Nice work otherwise.
     

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