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Thread: Increasing the life of a heat gun

  1. #1
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    Increasing the life of a heat gun

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    I have noticed that a lot of people have talked about heat guns failing after only a few roasts.

    I havent had this problem yet.
    One thing that I do is while I am cooling the beans I do not turn off the heat gun, I run it on its lower setting for a couple of minutes.

    If a heat gun is used flat out for a while the nozzle and element are very hot. When you switch off the gun the heat energy in element and nozzle combine, the gun gets too hot and can prematurely fail.
    By running it in the lower setting the internal fan will slowly reduce the heat.
    Blowing an external fan may reduce the heat too quickly. It also wont get to where the heat is.

    Hope this helps!

  2. #2
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    Re: Increasing the life of a heat gun

    I havent had that issue, My Heatgun is 2 years old and done at least 200+ roasts.

    I use a fan during roasting to blow chaff away and keep the gun cool and leave the fan running after i turn the HG off and dump the beans

    Mal

  3. #3
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    Re: Increasing the life of a heat gun

    I used to run a hire company that hired out heat guns. After having a number of expensive HGs fail, we finally settled on Ryobi HGs with the variable temp control. The only problem we ever had with them was clients would use them on full heat for long periods and when they turned them off then the thermal cut out would trigger because they were so hot, then they wouldnt go again until they had cooled down. We solved this problem by instructing the clients to turn the heat fully down and let the gun run for a little while before switching it off.
    We didnt have any problems with them tripping the thermal cut out after this.
    I use one of the same model Ryobis for my roasts and have a fan blowing over the HG during the roast to keep it cool then swing the HG out of the way at the end of the roast without turning it off as Im in a hurry to dump the roast into the bean cooler as quickly as possible. Once the roast is in the cooler and the beans are cooling down then I turn the heat down on the heat gun and let it run till the roast is cold (about a minute) before turning off the HG.
    Never had a problem with the HG which had seen plenty of general purpose use before I started using it for roasting coffee beans last January, and its done plenty of roasts since then.

    Cheers,
    Alan

  4. #4
    Senior Member greenman's Avatar
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    Re: Increasing the life of a heat gun

    Ill back up the Ryobi, Ive done 150+ roasts with mine now and its still going strong. Have used the cooling/chaff dispersal fan since new, Im sure it prolongs the guns lifespan.

  5. #5
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    Re: Increasing the life of a heat gun

    Definitely back up the suggestion in the OP of letting the HG cool before you turn it off. *My Bosche has 300+ roasts to it and still going strong. *In addition to the Greenmans suggestion for a cooling fan, I also have a paint brush I use to quickly remove any chaff / dust that still manages to settle on it as a way of further preventing cr^p from getting into its workings.

    Cheers,

    -A-

  6. #6
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    Re: Increasing the life of a heat gun

    After several cheap HG failures I got a digital model. When I finish the roast, it has a cool setting, cools itself off, then shuts down. It was middle of the road Wagner brand here in the states. John

  7. #7
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    Re: Increasing the life of a heat gun

    I have used my own cheap and nasty GMC heat gun and also a fellow CSers Ryobi, both benefited from being left to run on their low heat setting for a few minutes after a typical roast session on the corretto or they will cut out on their internal over temp devices.

  8. #8
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    Re: Increasing the life of a heat gun

    Just one more thing to extend the life a little once in a while split the heat gun and blow any acumulated chaff and dust off the elements. Any build up will cause that part to run hot and can burn out the wire. Also will reduce the chances of the fan jamming.

    I did notice that with some of the chaffier beans some of it getting sucked back into the gun and you can smell the bits burning when doing other jobs with the heatgun.

    BTW Happy owner of a Ryobi for around 10 years :)

  9. #9
    Senior Member Lovey's Avatar
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    Re: Increasing the life of a heat gun

    Behmor Coffee Roaster
    One tip I have is to take the HG off the stand after the roast and stand it on its base so that the nozzle is pointing up. That way the heat is exiting the HG through the nozzle, and not through the body. A fan blowing over the HG would also help in the cool down.



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