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Mazzer SJ Refurb - Octopus funnel and on/off switch mod


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I've just finished the last few tweaks for modifying an old SJ timer into a doserless grinder. It seemed like a good idea to post some pics and links to the bits that I used in case it helps anyone else. It will need a flashy new paint job at some point when I have decided on the colour.

I did it with a cheap used grinder off eBay, in case it didn't work out or grind as well as my Silenzio. I was pleasantly surprised actually, a bit more fiddly to dial in the grind but does give a wider range of flavours and better crema than I was expecting. Putting in all the beans I will be using that day into the hopper and weighing the output in the dosing cup means I benefit from some extra weight on top of the beans and avoid any static/chaff issues.

@jimbojohn55 's SJ pimp thread was a great resource for the octopus funnel mod steps, I removed the spot welds with a Dremel rather than trying to drill through the slippy stainless.

For the timer replacement I followed the below YouTube instructions, it went fine as I had a few practice runs with the crimping tool before trying it on the actual timer wires.

 

The wooden lens hood lid is from a Wilko's storage jar, funnel lid is a 130mm one from another brand of machine and I used a piece of rubber draught seal to keep it held in place. A small Ikea tray I was using already is just the right size to act as a grinds tray and fits neatly underneath the machine. Slightly Blue Peter, but it works for now!

Used SJ - £67
Octopus funnel - £8 - https://ebay.us/6UJTzf
SJ back plate - £25 - https://www.theespressoshop.co.uk/Mobile/en/gb/Mazzer-Super-Jolly-Motor-Back-Plate---SSJ0FRA04/m-m-3581.aspx
58mm lens hood - £8 - https://ebay.us/g8HVeh
On/off switch - £30 - https://ebay.us/MWFT4e
Replacement lamp - £3 - https://www.bellabarista.co.uk/green-indicator-lamp.html
Black round knobs for collar adjusters £4 - https://ebay.us/RTuVjU
Dosing cup 58mm - £4 - (as recommended by @DavecUK ) - https://ebay.us/Lw7rE4
Funnel lid - £10 - https://www.theespressoshop.co.uk/Mobile/en/Fiorenzato-CS-Doge-Doser-Lid-ø-130mm---A3200008/m-m-4331.aspx
Lens hood lid - £5 - https://www.wilko.com/en-uk/wilko-black-fusion-medium-canister/p/0479352
Total: £164

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I actually have a load of rods I made recently, I make mine slightly longer to get better leverage

I've just finished the last few tweaks for modifying an old SJ timer into a doserless grinder. It seemed like a good idea to post some pics and links to the bits that I used in case it helps anyone el

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2 minutes ago, Holyzeus said:

Thanks for the links, ordered a replacement lamp for my mini

No worries, glad they could be handy for someone. The BB one has spade terminals though, so you would need to sort out the connectors to join the wires to it. Doesn't matter which way round, just be careful of the capacitor when doing it...

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6 minutes ago, M_H_S said:

Hi great work! The flat three flat bits in the neck, did you do anything about them?

Sent from my SM-G950F using Tapatalk
 

Not so far, they aren’t a pain if you load up the hopper with more beans like I do and weigh the grinds not the beans, the extra ones mostly sort it out.

When I tried single dosing it with weighed doses of beans and the lens puffer,  I kept on getting some stuck on the ledges even with a weight on top. That plus chaff and more inconsistent grinds meant I modified my workflow.

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12 minutes ago, M_H_S said:

So you use a hopper?

Sent from my SM-G950F using Tapatalk
 

You can fit a fair amount in the lens hood and grinder neck as a mini hopper if required. I’ve been putting what I would use in for that day, last shot gets an extra weight on top, a puff from the hopper and the grind chute brushed out after. Helped with the overall grind consistency.

Edited by Northern_Monkey
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  • 1 month later...

What diameter should the opening at the bottom of the funnel be ideally? I'm about to embark on this mod and, whilst I can get a rough idea from the photos, it would be good to have a slightly more precise starting point.

Thanks!

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43 minutes ago, Holyzeus said:

@Wookiee pretty sure I saw 20mm previously in a post so I aimed for that. Cutting straight wasn’t my forte, ended up around 18mm

Mine was about 25mm so a bit wider, worked for me as I use a dosing cup so it helped. Smaller might be better if you want direct to go straight into the basket etc.

Edited by Northern_Monkey
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  • 3 weeks later...

This looks great. I have a question, hopefully someone can help. When I bought my SJ, it didn't come with any adjustment rods, so I've been McGuyever'ing it with a screwdriver...

I found them here : https://www.bellabarista.co.uk/mazzer-grind-adjustment-rod.html

But considering the cost, was wondering if anyone has come across cheaper (but fully assembled) alternatives anywhere?

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34 minutes ago, ArisP said:

This looks great. I have a question, hopefully someone can help. When I bought my SJ, it didn't come with any adjustment rods, so I've been McGuyever'ing it with a screwdriver...

I found them here : https://www.bellabarista.co.uk/mazzer-grind-adjustment-rod.html

But considering the cost, was wondering if anyone has come across cheaper (but fully assembled) alternatives anywhere?

M5 is the hole size, you can use a bolt and just attach something to the end of it.

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4 minutes ago, ArisP said:

Think I found a couple of potential solutions. Can anyone tell me what the overall length of the original adjustment rod is?

I wouldn't be overly concerned with the length of it, once it has at least 1.5cm of thread on it or more you'll be fine.

 

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12 minutes ago, Squidgyblack said:

I wouldn't be overly concerned with the length of it, once it has at least 1.5cm of thread on it or more you'll be fine.

 

Thanks, but the thread length is not what concerns me, but rather the overall length. The options I found are very short, and my concern is that they will not provide sufficient lever arm to make rotating easier and hence more accurate.

This is a good (looking) example, but too short I'm afraid: https://www.amazon.co.uk/PrecisionGeek-KNURLED-Thumb-Screws-Stainless/dp/B07WRCPNFF/ref=sr_1_5?crid=3MSUQ4OQAKW7B&keywords=m5+thumb+screws&qid=1577566302&sprefix=m5+thumb+%2Caps%2C208&sr=8-5

 

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