SKU: 98939871841

Air-Cooled Metal Vertical Stirling Engine with Flywheel Fan Model Education Toy

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Description

Air-Cooled Metal Vertical Stirling Engine with Flywheel Fan Model Education ToyAir Cooled Metal Vertical Stirling Engine with Flywheel Fan Model Education ToyFeatures:. The Stirling engine model adopts aluminum alloy flywheel and fan design. The main body & bracket are made of aluminum alloy, and the surface is anodized, which is rich in metallic luster. With natural bamboo base, both beauty and texture, unique collection crafts. . It's cooled by fan and it has a stable operation at high speed. . Using high hardness precision

Air-Cooled Metal Vertical Stirling Engine with Flywheel Fan Model Education Toy

Features:

.The Stirling engine model adopts aluminum alloy flywheel and fan design. The main body & bracket are made of aluminum alloy, and the surface is anodized, which is rich in metallic luster. With natural bamboo base, both beauty and texture, unique collection crafts.
.It's cooled by fan and it has a stable operation at high speed.
.Using high-hardness precision bearings, stainless steel heating tubes and aluminum alloy ventilating pistons, alloy steel power cylinders with precision brass power pistons, it works great with good wear resistance under high-speed operation. it also has a long life maintainance. That means you don't need to worry about broken glass cylinder pistons and life, precision machining manufacturing shows high-end craftsmanship quality.


.Instructions for Use:

Please read the instructions before use. Take out the alcohol lamp and add 95% alcohol (not more than 2/3 of the container). Ignite the alcohol lamp and heat it for about one minute, then start the flywheel by hand until the machine runs.

.Note:

1. The cylinder, piston, bearing, connecting rod and other moving positions of the machine are prohibited from filling oil.

2. During the whole heating process, do not touch the hot parts of the machine to prevent burns. Pay attention to the safety of using alcohol, children should use it under the supervision of adults.

3. Before placing the machine on the desktop for heating, please place a wet towel between the desktop and the machine to effectively insulate the machine and reduce the vibration of the machine.

4. When the machine is running at high speed, it may vibrate and shift. Please prevent the machine from falling from the desktop.


.Significance and Value:

1. By observing the running process of the engine, we can understand its structure and principle, and at the same time can truly restore the principle of Stirling engine operation, hands-on operation, and popular science knowledge.

2. It has high quality, exquisite appearance, and high collection value. It can be used as a high-end exquisite gift of mechanical craftsmanship.
.For Ages: 14+

Specifications:

.Color: As Shown
.Material: Stainless Steel + Aluminum Alloy + Alloy Steel + Brass + Bamboo
.Model: M16-CF
.Cooling Method: Air cooling
.Inner Diameter of Heating Tube: 20mm
.Piston Stroke: 16mm
.Piston Diameter: 16mm
.Flywheel Diameter: 65mm
.Fan Diameter: 102mm
.Bearing Model: Precision F684ZZ
.Heating Tube Material: 304 stainless steel
.Material of Ventilating Piston: 6061 aluminum alloy
.Power Cylinder Material: SUJ alloy steel
.Power Piston Material: Brass
.Bracket Material: 6061 aluminum alloy
.Flywheel Material: 6061 aluminum alloy
.Fan Material: 6061 aluminum alloy
.Main Body: 6061 aluminum alloy
.Base Material: Bamboo
.Product Dimensions: 10.5 x 10.5 x 21.8cm
.Product Weight: 970g
.Package Dimensions: 15 x 15 x 25cm
.Package Weight: 1100g
.Packing: Box

Package Content:

.1 x Stirling Engine Model

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
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  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 98939871841

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4.8 ★★★★★
Based on 26 reviews
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Ran
Draper, US
★★★★★ 5
URGENT!!!! REALLY WORKS!!!! Fact ✔️
Size: Pack of 3, 4 Ounce, Set name: B. Whitening
I was immediately convinced this would work due to its ingredients, I had a previous filling fallout. So I immediately requested he apply another filling while I was getting some other dental work done, and the dentist said there was no rush to install, A new filling, showed me a picture. It looked great still white no cavities. In the high definition, microscope photo he showed me,It almost look like the inside of a white Jacuzzi tub with molded seat, I had the rest of the work done and didn’t get to go back soon enough, and the tooth started to bother me when something sweet would hit that spot and I looked in the mirror and it was starting to turn a light brownish color, I had just heard about HA toothpaste, I did some research and this is what I found Hydroxyapatite = the SAME mineral your teeth are made of • Your enamel is mostly this material (like 70–97% of tooth structure)  • So instead of adding a chemical… it’s literally rebuilding with the original material When you brush with nano-hydroxyapatite: • Tiny particles fill in microscopic cracks in enamel • Helps reduce sensitivity • Can make teeth look whiter naturally (smoother surface reflects light better) • Strengthens teeth against future damage so I ordered 3 pack Boka HA and on everything I love in three days of brushing for 2 minutes twice a day morning at night, do not brush your teeth with tapwater ever!!! It has more chlorine than a swimming pool, calcium lead, and other harsh chemicals that will take away the layer it’s going to build always use bottled water and do not rinse this toothpaste out of your mouth. Let it settle in and pack it into your molars and in between your teeth,it was completely healed and no sensitivity to sugar, hot or cold, it tastes great, and the fluoride free is the only way to go fluoride will destroy your tooth enamel, I gave the other two tubes to my kids and they love it, I am looking forward to less dental appointments for sure!!!!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 21, 2026
N
Verified Purchase
Nicky Goldsmith
Lowell, US
★★★★★ 5
Five stars for BOKA without hesitation.
Size: Pack of 1, 4 Ounce, Set name: A. Ela Mint
I have tried a lot of natural toothpastes over the years and I can honestly say that Boka completely surprised me in the best possible way. From the very first use it felt like I had finally found a toothpaste that balances modern science with a clean ingredient philosophy. You will not be disappointed. The standout ingredient here is nano hydroxyapatite, which is the same mineral that naturally makes up tooth enamel. That immediately caught my attention because instead of simply masking dental issues it actually supports remineralization. After learning more about nano hydroxyapatite and how it interacts with enamel I felt confident giving this toothpaste a real trial. The texture is smooth and creamy and it spreads easily across the teeth. Some fluoride free toothpastes can feel chalky or thin but this one feels refined and well formulated. It produces a gentle foam that feels pleasant while brushing but never overwhelming. The flavor is another area where this toothpaste shines. It is refreshing without being harsh or overly minty. My mouth feels clean and balanced after brushing rather than blasted with artificial intensity. That subtle freshness actually lasts much longer than I expected. After about two weeks of consistent use I started noticing that my teeth felt smoother throughout the day. That polished feeling you normally get right after a dental cleaning lasted longer than usual. My teeth also appeared brighter which was a welcome bonus. Another thing I appreciate is the ingredient transparency. There are no questionable additives and it is completely fluoride free which is important for people who prefer alternatives that still support enamel health. Knowing that nano hydroxyapatite is widely used in advanced dental care products in other parts of the world made this even more compelling. The packaging is clean and modern and the tube dispenses easily without making a mess on the cap. It feels like a premium product from start to finish. What really impressed me is how well this toothpaste balances effectiveness, comfort, and thoughtful formulation. It manages to feel gentle while still leaving my teeth incredibly clean and refreshed. If you are looking for a high quality fluoride free toothpaste that focuses on enamel support and a healthier approach to oral care then I highly recommend giving this one a try. It has absolutely earned a permanent place in my daily routine and it is one of the few natural toothpastes I genuinely look forward to using every day.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 12, 2026
M
Verified Purchase
Mary
Carnegie, US
★★★★★ 5
Great toothpaste.
Size: Pack of 1, 4 Ounce, Set name: B. Whitening
This is by far really great toothpaste. I can tell the difference in the color of my teeth. And sometimes my teeth are kinda sensitive to harsh toothpaste. But this is good for sensitive teeth. And minty flavor is not to strong either. Try it. I hope it works for you as well as It does for me. 🤗
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 13, 2026
E
Verified Purchase
Elsviel
Pawtucket, US
★★★★★ 4
Gentle and Pleasant to Use
Size: Pack of 2, 1.3 Ounce, Set name: A. Ela Mint
This toothpaste feels gentle on sensitive teeth and has a clean, refreshing taste without being too strong. The texture is smooth, and it leaves my mouth feeling fresh after brushing. I also like that it uses nano hydroxyapatite instead of fluoride, which makes it an interesting alternative to traditional toothpaste. Overall, a good toothpaste for sensitive teeth and daily use.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 24, 2026
K
Verified Purchase
Kyle Mackison
Birmingham, US
★★★★★ 5
Great natural fiber soap bags
I'm a soap maker who lives with teenagers who always seem to get everything absolutely soaked in the bathroom. I invested in these bags as a way to help my soap last longer while providing some scrub without adding exfoliators to the formula. They are well made, a good value, and I love that they are made out of natural fibers. They dry out quickly, are not too rough, but still provide nice exfoliation. I will definitely purchase again.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 9, 2026

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