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Tamper type. Please help a noob

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  • Tamper type. Please help a noob

    Hi,

    just wondering if someone can explain what the different types of tamper are for, convex, concave and flat.

  • #2
    Originally posted by FineGrind View Post
    Hi,

    just wondering if someone can explain what the different types of tamper are for, convex, concave and flat.
    Convex = base domed out slightly. Concave = base slightly, ummm, concave (dished) Flat = flat base.
    Most, including myself use a flat base, a few use convex and swear by them, don't know much about concave, the idea does not appeal to me.
    Hope this helps.

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    • #3
      Dunno about most using flat. I have both and much prefer convex to get most consistent results.

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      • #4
        I have a convex, and I love it. I can't imagine a concave tamper being of any good for anything. :P

        While I don't believe there is a right answer, I like to try to match the shape of the tamper to the shape of the showerscreen. Maybe I'm imagining it (or just using this as justification), but I think my showerscreen has a slight convex nature to it. So the tamp gives the puck a nice concave nature, which suits the shape of the showerscreen.

        Again - in my justification - this gives the puck an even distribution from the showerscreen. Whether this gives any noticeable difference in the cup, that's another debate entirely.

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        • #5
          Originally posted by garglebutt View Post
          Dunno about most using flat. I have both and much prefer convex to get most consistent results.
          Never quite understood the purpose of a convex tamper. The point of the dispersion screen is to distribute the brew water as evenly as possible across the entire 58mm diameter of the basket whereas all a convex tamper does is create a depression in the centre of the puck that puddles the brew water in the middle for a far greater possibility of centre channeling occuring

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          • #6
            Originally posted by Vinitasse View Post
            Never quite understood the purpose of a convex tamper. The point of the dispersion screen is to distribute the brew water as evenly as possible across the entire 58mm diameter of the basket whereas all a convex tamper does is create a depression in the centre of the puck that puddles the brew water in the middle for a far greater possibility of centre channeling occuring
            And of course a concave will direct the flow to the edge of the basket and puck increasing the likelihood of edge channelling.

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            • #7
              Exactly... water will always follow the path of least resistance. Therefore... a flat tamp would seem to be the only way to go

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              • #8
                Originally posted by Vinitasse View Post
                Exactly... water will always follow the path of least resistance. Therefore... a flat tamp would seem to be the only way to go
                I see an opportunity for a poll here, not sure how to go about setting one up with this new software.

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                • #9
                  I have a concave tamper, it was a 10 dollar cheapie 50mm tamp from one of those kitchen stores...

                  I don't use it, as it's waaaay too small to fit in my coffee baskets..

                  Scary thing is, I've seen the same tamper being used on a commercial machine (and no, it was a full sized 58mm basket) Needless to say, I did not get coffee at that place.

                  But that's about the only concave tamper I've ever seen, I might possibly do a little bit of lathe work on it one day to make it fit a PV Lusso basket

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                  • #10
                    The Pullman Tamper | Frequently Asked Questions

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                    • #11
                      i've only ever used flat tampers and have never had any major drams with channeling, just keep the grind setting in check for the beans in use and everything is fine

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