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Thread: Rossi RR45 teflon tape mod.

  1. #1
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    Rossi RR45 teflon tape mod.

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    Hi there CSs,

    Just obtained a used Gino Rossi RR45 masquerading as a Bo-ema. * Dialing it in, I noticed a problem whereby it had a bit of a mind of its own, so I gave the top burr and carrier a soak in coffee cleaner......wow, what crud and I thought it looked fairly clean before the soak! * *After re-assembly, I decided to screw the carrier down until the burrs started to whisper and marked this point with whiteout. * *I then backed it off about six clicks and ground a few shots. * They still looked too course. * *Then I remembered reading about the burr carrier thread slack in the Rocky and sure enuff.....click, click. * Even though the thread felt fairly tight, it had play which allowed the top burr to float after the first whisper was heard. * One and a half turns of fine teflon sealing tape later and the whisper point was consistant, in fact, it went from silence to a near scream in one click.

    So, for all you snobs out there with one of these sleepers, even if you think yours is purrfect, do the tape mod, coz the result is a cheap machine with near micrometrical accuracy.

    Now for the next mod.....a smaller hopper........any suggestions out there would be greatly appreciated but will not be rewarded with monetary gain! *:D

    Thanks,

    b4b.




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    Re: Rossi RR45 teflon tape mod.

    B4B

    Yup, had the same issue with my compak, once Id cleaned out the crud in the threads, there was a bit of play between the burrs.
    The compak has a locking screw to "clamp" the two together, but I prefer the teflon tape as it gives a really nice smooth repeatable action.


    Theres been a few threads recently re smaller hoppers, some had suggested using a SS canning/preserving funnell and others had modified a SS mug.
    If you are generally making only a couple of shots a session, you may also consider just putting the beans straight into the throat of the hopper, you can mark the right level with tape/liquidpaper/whatever.

    Some then use an upside down tamper [a crappy stainless steel one...oh well] as a cover to the throat.

    P.S. CSer will always take beans if there is no monetary gain on offer!



  3. #3
    Mal Dimal's Avatar
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    Re: Rossi RR45 teflon tape mod.

    This doesnt seem to be an issue with the LSM..... It has a very fine thread (0.75mm pitch) with extremely close tolerances and absolutely no slack, either measurable or imagined. Going from one click to another requires quite firm action to rotate the upper burr carrier and once located, theres no way the adjustment is going to shift. All in all, Im very happy with the quality of workmanship on the LSM, reminds me of how things used to be done..... :)

    Mal.

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    Re: Rossi RR45 teflon tape mod.


    Sorry reubster, but I only have decaf at the mo. :(

    Im currently doing the tamper on top of the throat routine, so Ill do a search for the s/s mug and funnel you mentioned.

    Thanks for the help.


    b4b.


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    Re: Rossi RR45 teflon tape mod.

    Sounds great I have recently acquired a rossi so the teflon tape sounds good to me....... By the way has anyone thought of a way to either make it stepless or even decrease the steps......... Ray.

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    Re: Rossi RR45 teflon tape mod.



    Make it stepless?

    Dead easy -
    > just remove the hopper
    > depress the spring loaded tab that stops the adjusting collar being rotated
    > unscrew the collar and remove completely
    > remove the spring loaded locking tab - just lift it out of its hole
    > refit the collar

    Now stepless.

    jeff

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    Re: Rossi RR45 teflon tape mod.

    Maaaaaate, you rock! And I guess the teflon tape will help it retain positioning.......... Ray.

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    Re: Rossi RR45 teflon tape mod.

    I just got a Rossi CC45. Where do the tape go? Around the screw thread of the adjustment ring burr set?

    Also, is the whisper good? I found the right grind for my silvia (fantastic looking and tasting shots) but when the beans are all ground (and the grinders still spinning), theres the burr whisper. I assume its the two burr sets rubbing against each other? Thats not good is it?

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    Re: Rossi RR45 teflon tape mod.

    Without seeing the rossi, I would surmise that you could back it off at least a click and tamp harder to retain your 25 - 30 second pour time, if not then I guess there is a possibility of needing some burrs in the not too distant future, these are available through coffee snobs sponsor "coffee parts". I hope this helps mate......... Ray.

  10. #10
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    Re: Rossi RR45 teflon tape mod.

    Shawn_low

    I dont hav a rossi, but based on my experience with my compak and grinders in general, I find it hard to believe that [given correct dose and tamp], the optimun grind setting would involve the burrs lightly touching.

    I found with my compak [after thoroughly cleaning out the burr carrier threads and backing off the carrier locking screw] that here was actually some "play". In other words I could wiggle the upper carrier and if the burrs were very close to touching I would get a whisper as the burrs lightly "kissed" each other.
    This was easilly fixed by wrapping teflon tape around the burr carrier threads.

    You could easilly test this out, try each of the following but first:
    run the grinder without beans, then switch it off so that it continues to spin without power.

    1. Give the upper carrier a wiggle and see if/how this affects the whisper.

    2. Very carefully and slowly tighten the grind setting and see if the"whisper" gets more intense.

    3. Back off [coursen] the setting a smidge and see whether the "whisper" stops.

    I suspect you will find the problem is scenario 1. and it will be fixed with teflon tape.
    If the burrs are too close, 2. & 3,. will confirm this.

    You can also [with the grinder stopped] carefully tighten the burrs until you feel them just touch and determine how far this is from your optimun grind setting.

    If the burrs need to be touching to get a good grind, I reckon the burrs are worn out or damaged in some way or that the upper carrier is misaligned in the thread.

    Otherwise as RayC suggests the problem may be in your dose & tamp.

  11. #11
    Mal Dimal's Avatar
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    Re: Rossi RR45 teflon tape mod.

    Love my LSM ;),

    Doesnt display any of these idiosyncrasies, just great attention to detail and a very high standard of workmanship so theres no need to muck around with Teflon Tape, etc. I realise that my experience is not particularly helpful in this case, but for anyone else thinking about grabbing a used commercial grinder for home use, you really do need to check all of these issues out before parting with your hard-earned. If this isnt possible, then try to get someone else with experience to check this out for you or perhaps, buy a new prosumer model from one of our esteemed site sponsors. It will be money well spent in the long run....

    Cheers :),
    Mal.

  12. #12
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    Re: Rossi RR45 teflon tape mod.

    Well, its not too much hassle to put teflon tape and even with new burrs, these used commercial grinders are often cheaper than a new semicommercial one.

    Part of the fun for me at least, is taking apart a machine and fiddling.

    Also, its hard to argue with free sometimes. Having said that I am looking to get a new one from one of the site sponsors. So rest easy Mal.

  13. #13
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    Re: Rossi RR45 teflon tape mod.

    Honestly Shawn, these rossi grinders are built to last a thousand life times and give excellently consistent grinds as well. I have 2 of them they are simply bullet proof......

    Ray.

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    Re: Rossi RR45 teflon tape mod.

    Quote Originally Posted by Ray C link=1195558340/0#12 date=1204366483
    Honestly Shawn, these rossi grinders are built to last a thousand life times and give excellently consistent grinds as well. I have 2 of them they are simply bullet proof......

    Ray.
    Definitely agree with you regarding build quality. Ive taped up the burr threads and the play is all gone!

    I think I need new burrs soon but theyre cheap.

    Only two issues for me are:

    1) Prefer doserless. I do three shots in the morning and two in the evening. The dosing chamber is not maximised. Lots of coffee grounds gets trapped in the chute and in the burr chamber. Prefer a doserless grinder.

    2) Static. LOTS of grounds gets plastered onto the top wall of the chamber. Have to always use a brush to push grinds into bottom of dosing chamber.

    But I am more than happy with the grinder. And as I said, its hard to beat FREE!

  15. #15
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    Re: Rossi RR45 teflon tape mod.

    Tried the stepless modification but the the top rotates with the friction of the beans being ground which does not seem a great solution. Anything Im missing with the modification Wingnut?

  16. #16
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    Re: Rossi RR45 teflon tape mod.

    shawn
    new burrs will not only help cut down the static but also the noise, as you said they are only cheap, so invest


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    Re: Rossi RR45 teflon tape mod.

    For the hopper, try an open ended lamp shade for a suspended lamp. You can find them with a variety of throat sizes. It was easy to get a 2" one to fit the Rossi. I found a pan lid to cover it. works great, holds about 1/2 pound of beans ( a little large). Fits solidly but just clears the sensor on the doser. poor quality pic attached.


  18. #18
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    Re: Rossi RR45 teflon tape mod.

    Hi guys, I just picked up a second hand RR45.

    Looks like new and the burrs feel sharp to touch, but soooo gross, a full strip and soak in cleaner is already underway.
    Whilst searching for a manual I came across this thread, check out this mod to convert the top carrier from stepped with the pin to stepless with micro 1/10 adjustment accuracy http://www.home-barista.com/grinders/rossi-rr45-48-position-adjustment-modification-t8450.html
    A very nice piece of work and the tweak to reduce left overs in the chamber is simple and effective http://www.homebarista.com/grinders/modification-to-reduce-coffee-retention-in-grind-chamber-t12644.html
    I will look into manufacturing the locking ring from brass or Aluminum as this should also eliminate any thread play as well.
    Will post more later and let you know how i go.
    Has anyone removed material from the bottom of the doser inlet in the chromed top ring so that the ground coffee can free fall into the chamber and reduce build up?



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