blgros wrote:After a year or so with a used Rocky, I finally got some new burrs. I took the top burr off of the Rocky and compared with the new ones (bought from Chris Coffee). I can't tell the difference! Can't tell by look or by feel. Is that normal? Should I be able to tell?
Also, the ones I got from Chris don't recall seem clean and shiny, but dull and slightly dirty. Chris is pretty reputable, but they kinda seem used. Maybe used but sharpened?
1) As a general rule new burrs have a dullish looking surface rather than being shiny. MY experience is with Mazzer burrs but I'm hazarding a guess that it applies to Rocky burrs as well.
2) In my experience it's not really possible to tell the difference between worn burrs and new ones by touching the edges or doing a simple visual examination. If they're really really REALLY worn out it's easy to spot (I have seen such burrs) but I have rehabbed grinders in which the existing burrs looked and felt "okay" but my shots were crappy until I swapped burrs for a new set.
3) Reputable dealers will never ever sell used or "pre-owned" equipment of any type without clearly identifying it as such. Chris is a top rated reputable dealer with an excellent reputation and you can be assured that any product purchased from him as new is exactly as represented.
On a related topic but NOT specific to Chris or any other parts dealer - there are manufacturer's "OEM" blisterpacked burrs with original manufacturer branding on the label and there are also aftermarket burrs that are cut to the same exacting standards and will fit and work 100% as well as the branded ones. I have indeed had some feedback from an end user in the UK who purchased some burrs from a UK base dealer and they were aftermarket burrs that were of inferior quality. But I suspect that to be the exception rather than the rule.
I know that some dealers carry branded burrs, some carry aftermarket and some stock both. All reputable dealers will tell you which type you're getting if you inquire and it's safe to assume that reputable dealers will not stock any burrs that don't fit and perform as well as the OEM part. I've tried both types at home in my personal grinder and could not detect any difference between the Mazzer branded and aftermarket burrs that I compared (admittedly very limited testing - I only tried one type of aftermarket burrs).