Thor Hi do those who have used the Duo know if an alternative set of espresso burrs could be installed in the filter burr carrier or is the carrier different in anyway?

I only drink espresso and long black coffee but would be interested in the ability to have alternative espresso burrs to try out and it would be nice to have two sets installed in separate carriers at once to allow easy interchange.

I have SSP burrs and the filter ones fit fine (without the need for shimming underneath)…I am going to go now and measure up the espresso burrs and let you know in this thread how they would fit.

https://coffeetime.freeflarum.com/d/1605-niche-duo-83mm-flat/291

If the fitting is the same as Mazzer 83mm burrs then alternative burrs should fit fine. Of course some “may” not be OK in terms of height above the edges of the carrier, but that can be dealt with using 0.1 or preferably 0.05mm shim washers at 3 points on then periphery.

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    SSP hu fit

    Decent De1pro v1.45 - Niche Duo - Niche Zero - Decent is the best machine ever made -

      yep

      Decent De1pro v1.45 - Niche Duo - Niche Zero - Decent is the best machine ever made -

      Perfect - thats what I hope to do. Did they work well?

      Will be interested in Dave’s reports about how they work out also

        only tried them once because i wasnt ment to haha

        ill let dave give figures as he can measure stuff

        Decent De1pro v1.45 - Niche Duo - Niche Zero - Decent is the best machine ever made -

        Thor I measured the espresso burrs for thickness at the mounting rim at 3 points.

        The dimensions are as follows in mm.

        • 9.625
        • 9.624
        • 9.620

        Top Burr

        • 9.611
        • 9.612
        • 9.618

        This shows that the burrs are not cut completely flat and have a variance of about 7 micron for the top burr and 5 micron for the lower burr. The SSP filter burrs were better with only a 1 Micron variance on the same burr. It might be that the espresso burrs were an outlier and I did repeat the measurements 3 times with the same results.

        All Mazzer burrs I have checked only have a maximum 4 Micron variance on the same burrs. In general though the variance is about 1 micron. They are remarkably accurately made.

        As the thinnest Mazzer burr I have measured is 9.443mmand the carriers still have the height clearance for thse, clearly SSP burrs should fit as the set I have are almost 0.2 mm thicker than the thinnest Mazzers.

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            Which means the zero point for espresso will be out

            Decent De1pro v1.45 - Niche Duo - Niche Zero - Decent is the best machine ever made -

              Hi Dave thank you for such a detailed and quick response.

              I have already purchased a Duo & my interest is more about the potential versatility of it, so this does sound (potentially) very positive!

              Reading about the Duo online I do wonder if more would be interested on the basis if it turns out to be good for changing between different espresso burrs. Having two easily interchangeable espresso sets would be a big positive for me (rather than 1 filter and 1 espresso).

                as far as im aware the only difference in the two burr carriers is the colour.

                Decent De1pro v1.45 - Niche Duo - Niche Zero - Decent is the best machine ever made -

                  Cuprajake Which means the zero point for espresso will be out

                  It certainly will, but whenever you put new burrs on the carrier, you would have to find the Zero point and the best position of the 3 possible positions of the top burr carrier (nicknamed the “sweet spot”)

                  Cuprajake as far as im aware the only difference in the two burr carriers is the colour.

                  Yes, the actual metal carriers are identical.

                  Thor Reading about the Duo online I do wonder if more would be interested on the basis if it turns out to be good for changing between different espresso burrs. Having two easily interchangeable espresso sets would be a big positive for me (rather than 1 filter and 1 espresso).

                  I suspect many people will use the carriers in exactly that way e.g. HU SSPs for certain coffees and Mazzer Espresso for others. This is because the HU SSPs are not always better, or to put it another way, often worse.

                  Sadly the influencers and some forceful forum users on HB seem more interested in negging on pricing issues (or simply not reading the manual, rather than looking at the positive points. Or the fact that it doesn’t stall (or as some euphemistically put it for another competing grinder, “it’s not a stall it’s a safety cutout”). You won’t see many grinders able to do this…almost none. It’s from a standing start too, not running while dropping beans in.

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                        DavecUK Dave may I ask what you are using to measure the thickness of the burrs please? A micrometer I guess but are you able to recommend a specific model or features to look for?

                          I use this Tom, lots of fakes about, so buy from a reputable source or direct. I have their depth gauges and callipers as well. My dads old imperial stuff was Mitutoyo as well. They do have much more expensive ones costing 1000s, but mine is guaranteed to +/-2 Micron and that’s all I need

                          https://shop.mitutoyo.co.uk/web/mitutoyo/en_GB/mitutoyo/1305876921890/Digital%20Micrometer/$catalogue/mitutoyoData/PR/293-821-30/index.xhtml

                          P.S. If you do buy one be careful of a few things (not sure it’s in manual, but any good engineer knows this….as you can see my jaws are not fully closed, this is so changes in temperature don’t strain anything. Micrometers must never be stored with the jaws fully closed.

                          Also when measuring, try and hold by the plastic with your left hand, this minimises the temperature effects as they might warm up and avoid handling the workpiece too much. The older style engineers 1 handed usage works, but for best accuracy avoid touching more metal than you have to.

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                            DavecUK super helpful. Especially appreciate the time you’ve taken with the tips.

                              DavecUK
                              Tool porn!
                              My needs rarely go beyond a good set of Vernier calipers.
                              I am a lefty and only just discovered left handed verniers( I usually have to read them upside down).
                              They aren’t made for we lefties but for convenient measuring on lathes.

                                DavecUK managed to find the same brand here in Australia. Nothing like a trusted referral, especially one that’s handed down from two generations of British engineers! Thanks again.

                                    DavecUK a bit pricey compared to Ali Express of course but I’m interested in accurately measuring in microns so there is no point in buying anything other than a proven reliable product. I’ve bought a lot from AE but not with something like this.