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Thread: Homemade brass tamper for the car enthusiast...

  1. #1
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    Homemade brass tamper for the car enthusiast...

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    Gday fellow snobs,

    I havent been on the interweb for a while so I thought Id share my first tamper making experience.

    Since i was very young Ive admired my fathers metal lathe. *He got it from an auction when one of the local coal mines shut down many years ago.

    Needless to say its rather large... and needs a 3-phase power supply. *As an example it has been used to machine the heads of many a VW race engine (formula vee).

    But I digress.

    I was originally going to turn one up out of some aluminium stock we had lying around. * Too boring.

    Then I found a nice lump of brass... much more interesting.

    Quick flick through the old manual and I located an average speed to try it at.

    Being very soft, and with the big tooling that the lathe came with, I could quite easily take off 4mm or more on each pass to get down to my required diameter.

    Once down to the required D (of 51mm unfortunatley - being for my breville cafe roma...) I cut the shaft to go into the handle.

    ---

    Now Im sure many of you love your Pullman tampers. In fact I would love one myself some day.

    But my love of cars drew me elsewhere.

    My brother had an aluminium and leather gear knob off a Ford XR6T lying around...

    ---

    Im sure you can guess the rest of my thought process... I had a laugh




    I am now the proud owner of a 6-speed brass tamper!!!


    Pics will come soon. I just have to resize and get them off my camera.



    Anyone else know of weird and wonderful tamper handles theyd like to share??

  2. #2
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    Re: Homemade brass tamper for the car enthusiast..

    Nice work, look forward to seeing the pics! There was a thread here some time ago where a few expressed interest in a car gear knob tamper handle. I actually looked into leather wrapped handles a year or so ago as a follow-on from this, but figured most people wouldnt be prepared to pay a premium of $80+ just for a leather handle! :o

  3. #3
    Sleep is overrated Thundergod's Avatar
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    Re: Homemade brass tamper for the car enthusiast..

    Greg I think gear knobs might be a standard thread size.
    If you put the same size thread on top of a handle stem people could add their own knob.

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    Re: Homemade brass tamper for the car enthusiast..

    I think youre right TG but theyre a different pitch thread to what I use on the tampers. Youd have to have an adapter sleeve or something, and then theres the potential mismatch of diameters of the joining surfaces etc. But certainly possible if fit and finish was less important than the bling of a gearknob!

  5. #5
    Sleep is overrated Thundergod's Avatar
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    Re: Homemade brass tamper for the car enthusiast..

    If theyre a different pitch isnt it simply a matter of using a different die?
    The only problem I see would be that there may be a range of different threads.
    It was just a thought.........

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    Re: Homemade brass tamper for the car enthusiast..

    Yep if you were making the base specifically for that purpose you could just tap the appropriate thread, but if youre trying to add one to an existing base youd most likely need some adapter or retapping. In the context of PiccoloLatte making his own, youd just have to use the right tap and youd be in business.

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    Re: Homemade brass tamper for the car enthusiast..

    Haha. Yeah. I could have made it the rigt thread thread so I would have been able to remove it...

    But no such luck apparently.

    The base is glued to the knob with belzona molecular *;)

    It was my first attempt on a metal lathe though, as well as being my first tamper.

    I agree that most wouldnt want to pay an extra $80 or so on top of the normal handle.
    It was lying around because my brothers a mechanic.


    Im already thinking about my next one too....

    A piston shaped SS base and a Conrod handle... Might be a bit hard to find a food-safe conrod. I had a laugh

    Or maybe just another gearknob one with a 57-58mm base to go with the Silvia I plan to get.

    I would use the gearknob off a Nissan Silvia for it if they werent so ugly.

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    Re: Homemade brass tamper for the car enthusiast..

    most gear knobs come with various adaptors and locking screws to suit the myriad number of different threads used by all the brands


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    Re: Homemade brass tamper for the car enthusiast..

    there was a craze in the early nineties for 1) 8 ball gear knobs 2)spider suspended in clear resin........BRING IT ON!!!!!!!!!!!!!!!!!

  10. #10
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    Re: Homemade brass tamper for the car enthusiast..

    I have one my mate brought back from Brazil.
    Its a black tennis ball (just a bit smaller than the real thing).

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    Re: Homemade brass tamper for the car enthusiast..

    PICS...


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    Re: Homemade brass tamper for the car enthusiast..

    The money shot...


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    Re: Homemade brass tamper for the car enthusiast..

    i like it! what mcahine you got and does it fit nice??

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    Re: Homemade brass tamper for the car enthusiast..

    How many horses at the piston? Looks neat!

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    Re: Homemade brass tamper for the car enthusiast..

    I had a laugh... Id be lucky to get it into 3rd on my little t/b machine.

    Im finding it hard to keep a nice finish on the brass though.

    Softer metals are easier to machine, but they ding easier and lose their polished or brushed looking finish.

    Maybe I can take my time with some SS once I get a machine with a 58mm basket.

    **Edit** Ill add one more photo I found. A long shot. As you can see it would have looked better with a bigger base.


  16. #16
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    Re: Homemade brass tamper for the car enthusiast..

    Indeed! http://www.coffeetamper.com.au/why.html ;)

    A well-known Canadian tamper supplier started using brass and copper for tamper bases a while back - fine if you just want to keep up with fashion and they sure look fancy when first machined and photographed, but you only need to cast your minds back to the old first crack and second crack pieces to think what theyd look like after a bit of handling! If youre after a workhorse tamper thats in there for the long haul, stainless is the only choice in my mind.

    I agree that your handle on a 58mm stainless base would both last longer and look better proportioned, although as it is it still looks OK.

    Greg

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    Re: Homemade brass tamper for the car enthusiast..

    Thanks Greg.

    I appreciate the comments.

    I might hit you up for some tips if I ever get around to machining some stainless. I would imagine its not as easy as the brass...

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    Re: Homemade brass tamper for the car enthusiast..

    Quote Originally Posted by PiccoloLatte link=1199927332/15#16 date=1201058174
    Thanks Greg.

    I appreciate the comments.

    I might hit you up for some tips if I ever get around to machining some stainless. I would imagine its not as easy as the brass...
    Hi PiccoloLatte,

    As the person who machines most of Gregs tampers to size now..... machining stainless steel compared to brass is like cutting a rock compared to cutting through soft butter with a blunt knife.... you need special carbide tipped tools (and appropriate holders).... cutting speed is a LOT more critical.... and you need to use cutting lubricant as well....

    However the brass based tampers do look very classy (until they oxidise).

  19. #19
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    Re: Homemade brass tamper for the car enthusiast..

    Behmor Brazen - $249 - Free Freight
    As a car fan, I love it! Looks real neat to me!

    And speaking of conrods and pistons...

    My other half had a great idea for a knock box for me (just didnt get a chance to get to doing it sadly!).

    He wanted to get the top of a piston from an old radial aircraft engine and turn it into a knock box. Dont know if it would have been big enough but it was either that or a piston from a bulldozer engine. Itd be a solid thing thats for sure!

    If anyone knows of a spare radial engine anywhere... :D ;D



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