Grinder burrs BLUNT / Need replacing ?

QM0996

Hi All

Next time some one feels their burrs are blunt;  get them to me ASAP...

Had a few minutes to muck around on some old blunt burrs from a commercial machine...  I am happy with the outcome...

But if we had some one or a few that felt their burrs were pass it; let me do my stuff and return ASAP.  Then you could fit the burrs and provide some level of responsible feedback..

And maybe even save teh need to purchase a new set for some time  :thumb:

C-man

What did you do to them and how?

conikal

And......how do you know when  your burrs are blunt ??   what are the signs ??

C-man

QM should know......

Brett H

Blunt burrs generate more heat in the grounds, more noise than previously, take more time to grind and don't grind as fine as previously.  The reason most people change burrs is because they can't get good espresso extractions even on the finest grind settings.

C-man

QM can you weld two triple baskets together to make one 6X basket? my morning triple just finishes too soon....

UNM

Could send you a pair of burrs if  you want to play. Like these http://clean-machine.com.au/Coffee-Grinder-Burrs-Blades-Azkoyen.html Only blunt. I don't need them sharpened. If you wanted to though, happy for  you to try and I can give feedback.

Brett H

I have a pair of a8 83mm burrs you can have,

QM0996

on 1394185442:

I have a pair of a8 83mm burrs you can have,

Yes please......  Can I come and get  OR  are you still staying at the Wesley ?

QM0996

on 1394179038:

Could send you a pair of burrs if  you want to play. Like these http://clean-machine.com.au/Coffee-Grinder-Burrs-Blades-Azkoyen.html Only blunt. I don't need them sharpened. If you wanted to though, happy for  you to try and I can give feedback.

Yep, send me one  or both and I can have a play and send back for your feedback..

QM0996

on 1394164243:

Blunt burrs generate more heat in the grounds, more noise than previously, take more time to grind and don't grind as fine as previously.  The reason most people change burrs is because they can't get good espresso extractions even on the finest grind settings.

True to the above as well as number of other less obvious outcomes..... You can check to an extent as new and sharp will have an edge that is not unlike a sharp knife.  Thus using the back of you finger nail will give you a hint as to how blunt they might be.  My need to test is that I can get them sharp again, but unsure as to how well they will last...  Better than some of the cheep and poorer quality replacements but not as good as a true blue replacement (but significantly cheaper).  Hence for home use could be a good option for many... OM is for Quality Management LOL.

Brett H

on 1394188027:

True to the above as well as number of other less obvious outcomes..... You can check to an extent as new and sharp will have an edge that is not unlike a sharp knife.  Thus using the back of you finger nail will give you a hint as to how blunt they might be.  My need to test is that I can get them sharp again, but unsure as to how well they will last...  Better than some of the cheep and poorer quality replacements but not as good as a true blue replacement (but significantly cheaper).  Hence for home use could be a good option for many... OM is for Quality Management LOL.

I'm still at the Wesley for a bit but will let you know when I'm home mate.  I'd never thought of polishing burrs but it's a fantastic idea.  I've got the gear to do it but not the experience/technique.  Too easy for me to make a hash of it as my systems are un-refined.  You're certainly the right man for the job!!  This may turn out to be a very helpful venture.  Would you like a lux grinder to try too??  I'm going to gift it to a friend but borked at replacing the burrs.  This might quieter it down a bit.

QM0996

on 1394237174:

I'm still at the Wesley for a bit but will let you know when I'm home mate.  I'd never thought of polishing burrs but it's a fantastic idea.  I've got the gear to do it but not the experience/technique.  Too easy for me to make a hash of it as my systems are un-refined.  You're certainly the right man for the job!!  This may turn out to be a very helpful venture.  Would you like a lux grinder to try too??  I'm going to gift it to a friend but borked at replacing the burrs.  This might quieter it down a bit.

OK... Will chat later..  May work out well for a few of US :-)

C-man

what about my double decker triple 6X basket?

Naki^chap

I have a set of blunt  K10 conical burrs you could have a play with, Let me know if your interested.

QM0996

on 1394453418:

I have a set of blunt  K10 conical burrs you could have a play with, Let me know if your interested.

PM me and I will provide an address, also need yours to be able to return them. C-Man - just get a plunger. Same principle but just at a lower bar  :thumb:

Lacehim

I've got a set of blunt K6 burrs lying around.  don't want them back, but if you want to play about and you can pass them on if you have success.  Or are you just talking conical burrs?  I can imagine flat burrs being a PITA to sharpen.

QM0996

on 1394487667:

I've got a set of blunt K6 burrs lying around.  don't want them back, but if you want to play about and you can pass them on if you have success.  Or are you just talking conical burrs?  I can imagine flat burrs being a PITA to sharpen.

Have not looked at conical burrs........ Flat burrs are so much easer. It is not so much sharpen, but to restore the cutting edge via polishing... I would suggest that for home use (un confirmed at this stage) one may get 1/2 as much life again...... This is also something that seems to work well with the manufacturer's burrs; some of the cheaper burrs available from some places do not appear to be of the same quality and the hardness is somewhat questionable.

C-man

What do you recommend for my HG one burrs that are taking forever to season in?

QM0996

on 1394610065:

What do you recommend for my HG one burrs that are taking forever to season in?

Define season in....  As I understand it, your attempting to soften the cutting edge- make it dull ahead of its time... If a competition grinder  and new burrs, then a few kg of stale / old coffee beans to clean of any rough edges (poor QC) and to flush out any left over bits / dust and to fill any pockets with coffee grinds etc. then adjust the grind to suit the cup... Dose and Size. If you have a bean that works better with dull blades and others that like a sharp blade; swap burrs or get a second grinder. But under no condition would I be running par boiled rice or excess beans to "Condition the Burrs" as all it is doing is taking the edge off.....  Think of it like a knife; if sharpened roughly there are fine burs and it will cut / saw with ease - but it is not sharp!!!  If you then  POLISH the blade it becomes truly sharp.    If you use it with out polishing it will self polish; depending on how you use it and then, it will become dull and blunt over time.

C-man

on 1394618409:

Define season in.... This is what they say http://hg-one.com/the-hg-one-grinder/hg-101/breaking-in/

QM0996

on 1394779588:

on 1394618409:

Define season in.... This is what they say http://hg-one.com/the-hg-one-grinder/hg-101/breaking-in/

As stated before;  just because it is out there does not mean it is fact... Elements of truth but !!!! * A glove is HARD when you get it but needs to be supple; * Some pans wants a coating applied to it so that food does not stick or is able to manage heat transfer better - cast iron for eg..... * Like an engine in a car ????  Yea heard that before... do not drive at a consent speed or you will put a lip in the bore and when you rev it the rings will hit the lip and shatter..... LOL. A grinder needs sharp burrs - yes and dags need to be removed but after that, the killer of burrs is ongoing use/seasoning. Any cutting material likes to be polished after sharpening to remove any burrs, but after that the blade looses it's edge. However a grain mill is about crushing and pulverising and they DO need to have the edge taken off them; as your after a different grade of end product. A grinder cuts, a mill crushes and pulverises;  send me you burrs (With Kelsey on Sunday) and I will blunt (Season) them with some 2000 wet and dry; take about 2 min...

C-man

so just hand rub them with 2000 wet and dry? what about the TIN coating?

QM0996

on 1394829968:

so just hand rub them with 2000 wet and dry? what about the TIN coating?

Any seasoning will wear  the TIN coating;  I was being a bit cheeky as I believe the whole seasoning process other than a few days  or a couple of kg of coffee is a waste of time / effort and $$$. Unless you have two machines that are identical and side by side; you have nothing to use as a control / reference to see what if any change happens (Also the same batch of beans and plenty of them). Thus you risk  of group/google think and trap your self. It happens in the scientific community all the time, thus assumptions and misinterpretations propagate.  And for science they recognise this and are much more focused on the measurable outcomes as that way they can check if it is truly reproducible and not SUBJECTIVE.  6 months on and 30kg of rice and it will still be give you not what you might be expecting.... Let alone teh changes in the roasted beans your using. Just use it as a grinder and adjust to suit the bean and the cup.