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Need for new burrs

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  • Need for new burrs

    I bought a Rancilio MD50 from an auction a little while ago.  I wasnt sure about the burs, but as the grinder didnt appear to have ever been cleaned and the old burs were pretty much welded on to the collars I thought they probably hadnt been changed (the grinder is 9 years old).

    My new burs came the other day thanks to coffeeparts.  there is a definite difference i n the feel to the burs.  the new ones definitely have a sharp edge, not quite like a knife but I you could probably cut your finger on them.  in comparison the old ones are really dull and dont seem to have much of an edge at all.  I have attached a couple of photos below.  photos are a litle overblown but you can see a difference in the edges of the new (which are much cleaner) to the old whiich are a little worn.  Old bur is rusty cause I cleaned it and had decided I wouldnt reuse it so I didnt dry it off properly.

    what i might do when i get time is install the old ones and try and do a direct comparison to see what the difference is to the grind and in the cup if any.




  • #2
    Re: Need for new burs

    new bur

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    • #3
      Re: Need for new burs

      closeup of new bur

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      • #4
        Re: Need for new burs

        closeup of old bur


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        • #5
          Re: Need for new burs

          grounds

          I messed up the focus and had to crop

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          • #6
            Re: Need for new burs

            grinder in its original state


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            • #7
              Re: Need for new burs

              another

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              • #8
                Re: Need for new burs

                finished product.

                Total cost $225, plus about 30hrs of labour and a1/4 tub of coffeemachine cleaner for soaking all the bits that were gummed up with coffee oils.

                I still need to finish polishing the hopper with plastic polish, I got most of hte haze out of the doser but my arm was getting sore from wax on wax off. I think they had been using steel wool to clean the hopper.

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                • #9
                  Re: Need for new burs

                  final one. theres me in the reflection. fortunately I had put all my clothes back on by then.

                  i will post some more photos of the full strip down (grinder that is) and rebuild later.



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                  • #10
                    Re: Need for new burs

                    The doser plastic is looking good now.
                    I hope the hopper comes up as good for you.

                    Your sig says Mini Mazzer.
                    Why the MD50 then?

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                    • #11
                      Re: Need for new burs

                      Hey, does Greg do vanilla tampers for the MD50?

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                      • #12
                        Re: Need for new burs

                        Originally posted by Thundergod link=1162519670/0#9 date=1162522561
                        The doser plastic is looking good now.
                        I hope the hopper comes up as good for you.

                        Your sig says Mini Mazzer.
                        Why the MD50 then?
                        Meguiars Plastix polish for car headlights etc, brought it up quite well.  the hopper is alot more scratched up, i think they actually cleaned that, whereas I dont think they cleaned the doser.


                        I refurbished a micro cimbali lever photo in next post (are you able to post more than one photo in a reply?), which I was planning on taking into work and wanted to have a dedicated grinder for it.  I thought the cheapest way to get a decent grinder was to get one from an auction.  It cost me $165, then I bought the burrs, a can of enamel and some feet from bunnings (the rancillio ones were $20, only paid $3.90 at bunnings).

                        admittedly its a bit of overkill.  the grinder is automatic, every 6 pulls on the lever it starts grinding again, turns itself off when the dosser is full (its a big doser too).  it does seem a bit faster than my mazzer though, but that is probably the 64mm burrs compared to 58mm on the mazzer, I might put them through a race on the weekend to quantify. the motor is also quite torquey, there is a noticeable flex when it starts up.

                        Also i think the mazzer looks better, but the rancilio will be at work so it was function over form.


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                        • #13
                          Re: Need for new burs

                          lever

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                          • #14
                            Re: Need for new burs

                            Originally posted by fatboy link=1162519670/0#10 date=1162523876
                            Hey, does Greg do vanilla tampers for the MD50?
                            I was thinking about that. I have one for my expobar and its great. the cimbali i was going to pair it with is a bit of an odd size, 51mm. from the looks of his website i would say it would be relatively easy to fit, the current one just screws through from the top so it should fit, I would probably send Greg the whole protrusion which the tamper would screw into to get him to make it fit neatly. it is relatively small and just unscrews.

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                            • #15
                              Re: Need for new burs

                              Originally posted by fatboy link=1162519670/0#10 date=1162523876
                              Hey, does Greg do vanilla tampers for the MD50?
                              Its never been asked before but thats the sort of installation theyre designed for. So no reason why not providing mounting hardware is compatible.

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