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SR540/SR800 Glass Extension Tube

Your Price $79.00


SR540/SR800 Extension Tube is 10.25" Tall. It comes with high-temperature silicone bands for the bottom and one double lip seal for the midsection. This glass extension tube is made to help the SR540/SR800 with bean movement and better heat output. This tube is to be used with the original chamber and chaff basket. This SR540/SR800 Extension tube will allow the machine to run on lower fan and heat settings once the beans get lighter in weight. We usually finish with FAN 2, and HEAT 1. This will be very useful for any users that have a harder time with their supply voltage being slightly inadequate.


Customer Reviews

Average Rating
February 27, 2024

Enables the use of lower fan and heat settings - you get good fluidization ("bean bounce"). Lower fan settings mean lower noise. It does make the unit significantly taller.

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January 17, 2024

Very worthwhile upgrade! Better bean movement resulting in a better roast no comparison! The first one arrived broken and I dreaded the process ahead of me to get a replacement but I was quite surprised at how easy that process went! Excellent customer service!!

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August 26, 2023

If you have an SR800 Freshroast you MUST get the extension. What a difference it makes. It cut the roast time 75% and increased the control tremendously. Because of my electric company's inadequate power, it used to take 20+ minutes to get a nice Vienna roast, and the result was a rather "baked" tasting product. Now I can bring up the roast to first crack within a few minutes, then back off the heat to bring the roast up to the precise shade and surface texture in less than 7 minutes. The roast is much more uniform, and the chaff separated off more efficiently. It used to take hours to roast a weeks supply of beans, and now it is done in minutes. The ability to roast at much lower fan speed and temp also makes it much easier to hear the "cracks". As I said before, this extension is a "must". I wish Freshroast would just go ahead and make a tall roast chamber and save us the extra 80$!

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January 16, 2023

No joke, this is truly a gamechanger. Before the extension tube, i had a really tough problem getting the beans to move around (without a lot of fiddling with cannister) and a tough time getting the beans up to temperature. Now, its not even close to an issue. Getting a nice roasting temperature curve is not a problem now. easy to control temperature and movement. Able to finally get a nice consistent roast, with no real work on my side :) LOVE IT. I'd say the only "con" is that it can feel a bit fragile at first (before getting the rubber gaskets installed), but once its in place, it seems pretty solid. Maybe a bit top heavy now, but ya know, its totally worth it.

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April 19, 2022

Buy It, This extension tube makes roasting beans on a breeze. A must for roasting 8oz of beans. The design creates a Bernoulli effect, which increases the air speed within the chamber. The beans are lofted effortlessly in the roast chamber. Higher temps are achieved at lower power setting. I start my roasting at Fan 8 Power 2 and Finish roasting at Fan 4 Power 5. The beans are evenly roasted every single time. The extra bean loft helps with removal of chaff. I have noticed rolling first crack and no stalling of the roast. Its even easy to achieve second crack. The lower Power and Fan setting for roasting will extended the life of the SR800 motor and heat element.

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February 17, 2022

This makes such a difference, It should be standard equipment not a upgrade.

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February 9, 2022

Pros: The unit itself, once assembled, feels solid. Its about the same thickness as a drinking glass, but not as thick or durable as say a pint glass. Everything you’ve already read about it is is correct. It drastically increases not only air flow, but the temperature control. The roasts appear to come out “more even” perhaps due to the increased movement. Overall the unit increases temperature, movement and control. It feels exactly like getting an upgraded roaster version from the same company, a version “tube.0” if you will? Larger batch size is possible, although you may need a chaff collector tweak. Cons: Its expensive for what it is. It is a “clunky” non-elegant solution, especially the way it fits into the other chamber. The product is top heavy and just assembling the parts in preparation to roast induces anxiety. Removing a rocket hot chaff collector at the end of the roast….doubles that anxiety. Although everything is available online these days, there were no assembly instructions or links in the packaging I received. Once assembled it no longer fits into the box it came in, so you will need to find another way to store it. As others have said this absolutely should be standard equipment for the FreshRoast(s). It should also include some kind of port for a bean probe(s). Conclusion:If your beans aren’t moving at the start of your roast, you could absolutely benefit from the extension tube. If you have uneven roasts you may benefit. If you have ham hands, are inherently clumsy or can’t sleep at night when things are “jury rigged” together, you might want to look elsewhere for another solution.

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October 26, 2021

This extension tube dramatically improved the ability to roast specialty coffee.

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September 21, 2021

Great product! This should be included in original equipment. I have been roasting a half pound at a time and finally achieved the level of dark roast that I enjoy.

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September 15, 2021

I had a very old sr500 and loved it. Replaced roasting chamber and lid a few times along the years. It finally died and I was happy to purchase the sr800 from a company that made such a good product that lasted me so long. The sr800 was just irritating to use… until I got the extension tube. It made it a totally different (and much much better) machine. I love roasting coffee with it now. So the question I have is…. Why would freshroast make a product which they KNOW needs to be modified to be as good as their old model? If it is so much better with the extension tube, why not just charge 50 bucks more and sell it as the stock unit with the extension tube? It would make their customers much happier and much better roasters… which would keep them interested longer. Anyway, that is a very long winded way of saying that I LOVE this extension tube. If you are considering buying one, just do it. You will be grateful each and every time you roast.

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August 20, 2021

This extension tube works great it allows the coffee beans to rotate and allows a more even roast.

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July 9, 2021

This tube is a little pricey. But, it allows A LOT more control over the SR800 roast. I have only roasted 1/2 lb batches so far. But, I can see maybe 3/4 lb roasts for sure. Very pleased with this add to my equipment.

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July 5, 2021

First one arrived in 1000 pieces. Poorly packed. Replacement arrived and it was a great add! CBC service was outstanding in replacement. Sad that tube isn’t shipped in a styrofoam case. But, all is well now and the tube really makes roast control easy. Very pleased, overall!

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June 11, 2021

When I purchased the SR800 Roaster for my husband, it was one of the best purchases we have made. He then told me about this extension tube and we had to try it. It is great. The coffee beans roast so much easier. He loves it and I love the coffee he roasts up for me.

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January 3, 2021

This item appears to be out of stock for the moment, but that doesn't surprise me. It works GREAT and exactly as I hoped it would. The extra length and agitation has added a whole level control to the roasting process that the SR800 should have had from the beginning. I absolutely love this product. Note - now that your roaster is very tall, do something to support it so that you don't knock it over :)

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