So while adjusting my grinder, I managed to loosen the burrs a lot more than intended. It's a lot easier to loosen than it is to tighten, so while trying to tighten it back into place I accidentally broke the adjustment pin. On top of that, motor turns on but the burrs don't spin. The burrs are probably about half an inch away from one another, so I'm hoping when I get replacement pins I can just re-tighten it and it'll start working, but I'm not sure.

So I've got 3 questions:

- What is the best way to remove the broken adjustment pin from the adjustment collar? I know I can put replacement pins in other spots, but I'd like to remove this too.

- Anyone familiar with the replacement adjustment pins from Espressoparts found below? I ordered a pair, but wanted to know if there is a better method for adjusting the collar.

http://www.espressoparts.com/MAZ_83Z

- Are the burrs not spinning after a certain looseness standard, or do I have another problem on my hands?

If the motor is actually running and the lower burr not spinning, you would surely hear a screeching sound because the lower burr carrier is a light press fit onto the motor shaft. And, if that be the case, your problem is an order of magnitude above a broken pin .

Here is a good link on disassembly:

Mazzer Super Jolly burr replacement

Post some pics of your broken pin.

Here is an image of the pin broken off inside the adjustment collar.

Those pins have M5 x 0.80 threads. I just removed my pin and the threading appears unusually "loose" so you MAY be able to use some miniature needle nose pliers based on your pic. Otherwise, the remaining stub needs to be center punched and drilled (preferably with a left hand drill-could be tough to find locally) and then use an easy-out.

This is not always an easy task and the risk of causing more damage is always there. I'd concentrate my thinking on the motor running/burr not spinning situation.

I can turn the adjustment on my Majors with my hands, not using the pin if I want. I'm concerned about the burrs not turning, and the upper carrier needing enough force to break the pin. It *sounds* cross-threaded.

On the one hand, there is a set of broken screw/bolt removal tools that I can recommend, used them for removing broken screws in my Rocky's burr carrier. The Grabit screw extractors come with a reverse twist bit on one end to make a hole, an the extractor on the other end, and are in hardware stores fairly inexpensively. If you're not finding the one that you want yo my have to buy a set of three.
The reverse twist drill bit is probably enough to extract the pin remains, however.

I'm curious to see the rest of the grinder. What's the burr carrier look like inside? I'd remove the upper carrier and post pics of the lower carrier.
You know, of course, that only the lower one is supposed to spin, right?

Take the grinder to a machinist or auto mechanic. They can drill a hole in the middle of the broken-off adjustment pin, reverse-thread the hole, then back it out. Or, buy a screw extractor kit from the hardware store.

One the topic of removing broken screws...

I've had good luck with attaching a new shaft to a broken head. Put a tiny dab of epoxy or superglue on the head of a small nail and then glue it to the stuck bit. You can then unscrew both with pliers. Of course, be extremely careful not to get glue onto exposed threads.

As far as your last question, it unfortunately sounds like you have another problem. The lower burr will spin with the upper burr carrier completely removed. Are you sure there is not some sort of interference?