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Thread: BBQ Roasters a HUGH success, easy 5kg

  1. #1
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    BBQ Roasters a HUGH success, easy 5kg

    I've researched these for the last 3 years and since I just killed my Behmor 1600 (after upgrading it to a 1600 plus I left it unattended and smoked out the whole back yard!) I decided to build the bbq drum roaster. I have seen drums available online from RK and CRC from the USA but cost was just too high, so my first and very short term drum was made from some perforated aluminium I found in the shed. My aluminium welding skills are kindergarten standard but it does the trick. Its 500mm long by 250mm diameter and will comfortably do up to 5kg but I mostly do 1kg roasts. I modified a wiper motor to run at about 35rpm. The BBQ is a 4 burner on natural gas and bought off gumtree. I run the burners mostly on full until first crack then drop about 50%, a 1 kg roast takes about 10-11min (I chose this time based on professional roasters who've given me some info on their 15 & 60kg roasters and profiles and have allowed me to watch their roasting process.

    I am now developing the hardware to run several PID's and run profiling software to get better consistency; however using a bbq with a large window and a quiet motor allows me to closely monitor the darkness and cracks. I'm also getting a better drum made by the friend who supplied the original aluminium mesh. I preferred stainless but haven't found a reason not to use aluminium???

    I bought 3 bags of beans, 30kg Brazil, 35kg Columbia and 35kg Costa Rica which gave me more freedom to experiment and throw out a few kg's; fortunately It only took 5 roasts in the bin to get a roast I was happy with.

    Honestly, after 3 years of research, $1500 worth of barista training, 3 months learning from commercial roasters oh and lets not forget the carrot stuck up my arse!, I'm glad I took the plunge, I almost paid $7000 for a used 5kg Toper, thus far I've only spent $230 on my bbq setup.

    If anyone would like to give some critique, I mean from peeeps who also have a carrot up their arse, I'd be happy to send some samples to you to taste as I'd really like some feedback; at my expense btw.
    bbq_roaster.jpgColumbia.jpg
    Dimal, fg1972, GrahamK and 4 others like this.

  2. #2
    Senior Member matth3wh's Avatar
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    Looks like a great size drum and BBQ Setup! Roast looks pretty even to boot.

    Be interested to know some more details on the wiper / rotisserie setup.

  3. #3
    Senior Member artman's Avatar
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    Are you using organic carrots?



    Great setup, nothing like a successful DIY.

    How do you cool the beans?

    Cheers
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  4. #4
    Senior Member artman's Avatar
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    Forgot to mention, re the Behmor you have probably just blown the main thermal fuse. Could be easy fix.

    Cheers

  5. #5
    Senior Member matth3wh's Avatar
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    And is it a hugh organic carrot 🥕?

  6. #6
    Senior Member fatboy_1999's Avatar
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    Is the carrot a mandatory requirement?
    I've been BBQ roasting for 13 years and never felt the need.
    Dimal, matth3wh, noonar and 2 others like this.

  7. #7
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    Its still fully functional but wasn't keen to roast in it after tons of smoke poured thru it and the blackest of beans came out

  8. #8
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    There's no gear reduction on the output, I've just jury rigged a fitting to the shaft of the motor to marry up to the shaft of the rotisserie/drum
    matth3wh likes this.

  9. #9
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    Currently I have an industrial fan that once I open the hood it blows right on top of the drum. I'm having a plenum made up to blow from underneath and a catchment filter for the chaff
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  10. #10
    Senior Member csutak40's Avatar
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    If it is anything like mine, it isn't :-( I did the same thing, also straight after converting it to the 1600+) Mine still works, but no matter what, I couldn't get all the soot out of it, so every roast tastes burned

  11. #11
    Senior Member greenman's Avatar
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    Behmor Coffee Roaster
    There is a guy is Perth who has built a coffee roaster out of a spit roasting bbq and runs a successful cafe/roastery in Hazelmere, I think he does 10kg roasts on this beast--his cafe is in a rural setting and they have live music on the weekends, super laid back atmosphere and the coffee tastes pretty good to boot!!!
    coffeechris and matth3wh like this.

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