The glass piston has a crack. Can I buy a new piston?

Please contact us though Amazon message system, which is private, and we will mail you a new piston free by USPS. Thank you. Regards, Maria

Does it work on your hand ?

It requires temperature difference of about hot water (~200F) vs room (~70F) so ~130F either way to run great. Assuming your hand is 98F and you are in Minnesota in February (-30F) then it will work just fine ;)

How do you lubricate it with graphite?

Look for lock/key lubricant. It is sold at DIY, Hardware, and Stirling engine stores.

Once Best Seller Most Classical Ltd

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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HK$664

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Sold byAmazon Hong KongDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚙️ Ignite curiosity and time your coffee with classic mechanical charm!

STEM POWERHOUSE - Perfect for science projects, physics demos, and sparking curiosity in mechanics.
EFFORTLESS IGNITION - Just place on hot water and watch it spin—instant kinetic magic.
ELEGANT ENGINEERING - Beautifully crafted with stainless steel and PVC for a sleek, timeless look.
ENDLESS FASCINATION - Keeps running as long as temperature difference lasts—like a desk conversation starter on repeat.
RISK FREE INVESTMENT - 365-day free replacement and 1-year free spare parts—confidence guaranteed.

The DjuiinoStar DLTD-303 is a compact, low-temperature Stirling engine model that runs on the heat from a mug of hot water. Crafted with precision stainless steel and PVC, it serves as both an educational tool for physics and mechanics and a unique coffee timer. With a 4.7-star rating and safety certifications, it’s a perfect gift and conversation piece that combines art, science, and functionality.

Specifications

ASIN	B077LHS81K
Age Range Description	Kid
Best Sellers Rank	#126,292 in Toys & Games ( See Top 100 in Toys & Games ) #1,139 in Educational Science Kits
Brand Name	DjuiinoStar
Customer Reviews	4.7 4.7 out of 5 stars (2,151)
Educational Objective	Mechanical
Item Dimensions	4.06 x 4.06 x 4.92 inches
Item Weight	8.48 ounces
Manufacturer	DjuiinoStar
Manufacturer Part Number	DLTD-303
Manufacturer recommended age	13 years and up
Material Type	PVC, Stainless Steel, Steel
Model Number	DLTD-303
Number of Items	1
Set Name	Most Classical Low Temperature Stirling Engine
Size	103x103x125mm/4.06x4.06x4.92in
Theme	Physics

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