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BM/HG roast questions
I think I have it down now. The only problem I am having is with my heat gun. I am using a Wagner heat gun and I am on my third one. The first lasted about 1 month, the second 1 week, the third 1 roast. I am not sure what is wrong with these heat guns. They just would stop turning on. So, I ordered one from Harbor Freights. Hopefully this one will last longer.

Are you supposed to do anything special with the heat gun? I just use it to roast, turn it off, roast again on another day.
I noticed that if you hold the heatgun verticle, so the heated air goes back up into the intake, it shortens the life of the heatgun.

Roaster: CoffeeAir II 2# DIY air roaster
Grinder: Vintage Grindmaster 500
Brewers: Vintage Cory DCU DCL, Aeropress, Press, Osaka Titanium pourover
Yeah, what CHAD said. I use Wagner 775s and I burnt up a few before I realized that the hot blowback was going into the air inlet and taking out the fan. The Harbor Freight guns are easier on the budget and have an inlet that is farther away, but can burn up the same way -- unless the nose piece melts out first. :trink25:


g8rgrad2k wrote:
The only problem I am having is with my heat gun.
Are you supposed to do anything special with the heat gun? I just use it to roast, turn it off, roast again on another day.

I've had really good luck with the $10 Harbor Freight heat-gun. I've used one for over a year now.

But I always use a flat sheet of aluminum as a 'lid' for my bread machine (see photo above). I have a hole in the lid just large enough for the heat gun's 'snout' to stick thru.

I think this method (borrowed from Stu), is protecting my heat gun from overheating. Give it a try. -bill
Edited by bvwelch on 08/26/2009 12:04 AM
In my Restrictor Plate Roaster I use a piece of plywood with a couple of holes cut out for the heat gun and it seems to block most of the blow back, but i found that the part that melts the fastest is the trigger switch. So make sure you turn the HG so the switch is protected. I regularly roast 2 pound batches with my Welbuilt (Northern Tool) 1500W HG and have gone as large as a 1 Kilo batch.

I'm so Bad, I'm Good!
I'm putting the small back into Small Business!
Thanks for the responses. That is most likely the problem. I have my hg mounted almost vertical above the beans. I have already ordered one from harbor freights. I need to figure out a way to mount the hg so that it doesn't overheat. Maybe I will try bills set-up.
You can get some flexible aluminum tubing at an auto supply store and use a worm drive hose clamp to secure it to the end of your heat gun. That will get your HG back away from the roast. I put about a 6" long piece of 1 1/2" diameter tubing on the end of mine. It's called heat riser tubing.

On the Harbor Freight Orange colored HG's you can remove the screw from the bottom of the Grey nosepiece and remove it giving you plenty of room to fasten the tubing.
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