







Alpha Balance Beam Dual-Cylinder Dual-Piston Stirling Engine Model
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Why You'll Love It
- Therapeutic crafting experience
- Sense of accomplishment
- Healthy stress relief activity
- Stunning decor on your bookshelf
- Museum-quality realism
Pairs well with
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Shipping Policy
Thank you for your love of surplusfun. If you are not satisfied with our product, please let us know and we can help you return it within 30 days of receipt, minus return shipping and handling.
We will process your order within 1-3 business days and shipping to most countries worldwide takes 7-21 business days!(USA, Canada, Australia, New Zealand, UK, Germany, Switzerland, France, Spain, Italy, Singapore, Norway, Denmark, Japan, Korea)
Returns are allowed
- Received damaged product (excluding outer packaging damaged in transit)
- Products received in error
Please note, returns or exchanges are not accepted for opened or used items.
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For any general questions, support, or inquiries regarding our products and services, please email us at service@surplusfun.com. Our dedicated team strives to respond to all emails within 24 hours, ensuring you receive timely assistance.Our customer service representatives are available Monday through Friday from 9 AM to 5 PM (EST) to address any concerns or questions you might have.
Experience the mesmerizing harmony of physics, engineering, and high-end craftsmanship. The Alpha Balance Beam Dual-Cylinder Dual-Piston Stirling Engine is a heavy-duty, fully functional mechanical masterpiece. Operating on the advanced $\alpha$-type configuration, this engine converts pure thermal energy into breathtaking kinetic motion, serving as the ultimate testament to precision manufacturing.
Constructed from premium aerospace-grade metals and set upon a beautiful bamboo base, this finished, ready-to-run version is designed for mechanical enthusiasts, educators, and collectors who demand nothing less than engineering perfection.
How It Works: The Power of a 500°C Temperature Gradient
Unlike standard Stirling models, this advanced $\alpha$-type configuration features two completely independent, identical vertical cylinders working in tandem. One side is dedicated to rapid heat generation, while the other handles rapid cooling—yet both cylinders generate power simultaneously.
During continuous operation, the heating side climbs up to 600°C, while the highly efficient cooling side maintains a steady 50°C even after 20 minutes of running. This massive 500°C+ temperature differential provides an incredibly powerful, continuous source of kinetic energy.
To maximize stability, the two cylinder connecting rods interact through a precision gear system with a 2:1 ratio. When the crankshaft reaches a blistering 1000 r/min, the heavy-duty, 78 mm flywheel spins at a thrilling 2000 r/min, utilizing strong rotational inertia to deliver an exceptionally smooth, quiet, and vibration-free performance.
Key Features
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Advanced $\alpha$-Type Dual-Cylinder Configuration: Separated hot and cold vertical cylinders isolated by stainless steel heat insulators, maximizing heat transfer efficiency and thermal power output.
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Micro-Precision Aerospace Engineering: The cylinder and piston liners are forged from legendary GCR15 bearing steel, CNC-machined, and quenched to an extreme hardness of 58-62HRC. Ground to a razor-thin tolerance of $\pm$0.005 mm, it ensures a near-flawless airtight seal for maximum thermodynamic compression.
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Ultra-Smooth 30-Bearing System: To achieve an incredibly quiet, friction-defying run, the entire engine is structurally supported by 30 precision bearings (including 14 specialized performance bearings).
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Exquisite Luxury Materials: Crafted from a striking blend of solid stainless steel, polished brass, and dual 10 mm heavy-duty aluminum alloy brackets, all anchored beautifully on a sustainable, anti-vibration bamboo base.
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Finished Masterpiece: This is the fully assembled, finished version—no tedious building required. Simply fill the alcohol lamp, light it, give the flywheel a manual turn, and watch physics come alive.
📐 Technical Specifications
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Model Name: Alpha Balance Beam Dual-Cylinder Dual-Piston Stirling Engine
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Product Form: Finished Version (Fully Assembled)
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Material Composition: Stainless Steel, Solid Brass, Aluminum Alloy, Sustainable Bamboo
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Product Weight: 2.2 kg (Heavy, ultra-stable desktop footprint)
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Product Dimensions: 190 × 138 × 200 mm
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Heating Tube Inner Diameter: 20 mm
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Piston Diameter / Stroke: 20 mm / 20 mm
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Flywheel Diameter / Weight: 78 mm / 155 grams
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Pulley Diameter: 20 mm
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Total Bearing Count: 30 Precision Bearings
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Starting Method: Manual Start (Hand-cranked assist)
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Cylinder Liner Inlay: Dual 2.5 mm Liners
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Recommended Age: 16+
Multifunctional Applications
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The Ultimate STEM Educational Tool: Provides an unforgettable, hands-on demonstration of thermodynamics, mechanical gear ratios, and green energy principles.
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High-End Desktop Decor: A sophisticated conversation starter for executive offices, laboratories, or home libraries.
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DIY Power Generation: The integrated 20 mm pulley allows you to connect the engine to a small external generator to light up LED bulbs or power small gadgets.
📦 Packing List
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Alpha Balance Beam Stirling Engine (Finished Version) × 1
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Specialized Glass Alcohol Lamp × 1
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Comprehensive Operations Manual × 1
⚠️ Safety Note: This product is recommended for users aged 16 and older. The heating cylinder reaches extreme temperatures up to 600°C. Please operate in a well-ventilated space away from flammable objects, and do not touch the heated components during operation.

Alpha Balance Beam Dual-Cylinder Dual-Piston Stirling Engine Model
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What Makes It Special
Mental Refresh
Immersing yourself in detailed crafting stimulates the mind, helping you reset, relax, and step away from everyday routines.
Meaningful Time Together
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Perfect as a Gift & Display Piece
Give more than a gift—offer a memorable experience that transforms into a unique decor piece to be proudly displayed.


Why Our Craft Kits Are So Popular
🧘♀️ 98% say the moment the wooden pieces fit together, stress simply melts away.
💑 97% of couples now enjoy creative evenings together — more fun, more connection, and better than another night of TV.
🎁 95% agree: “The best gift ever!” — far more meaningful than gift cards or chocolates.
FAQs
Please read our FAQs page to find out more.
What does your DIY Craft Kits comes with?
Our DIY craft kits come with everything you need, from detailed instruction guides, cutting tools, craft paper, solid plywood, and lights. However, due to shipping restrictions, we are unable to provide glue. However, we recommend that you purchase silicone glue for your craft projects at a bookstore or art store!
Shipping time and return policy
Thank you for your choice and support. Your order will usually ship within 72 hours, air freight to most countries is expected to take 7-21 business days.
We offer a 30-day return policy (30 days from receipt of your order) and only accept unused, undamaged merchandise.
Damaged and missing parts
Don't worry if parts are lost or damaged, we offer free replacement parts Contact Us
Problems encountered during model assembly
All our models are carefully selected, designed and tested many times. The quality is no problem. Considering the difference in hands-on ability of each person, it is inevitable that some problems will occur. Here we share some tips for model assembly
Due to the natural properties of wood, wooden parts are fragile and you need to use proper force to put them together
All wooden model drive parts or modules. Always use sandpaper to sand and wax block to lubricate. Make sure that the drive parts will work properly. This is the key to successfully completing your wooden model.
Stay patient, follow the instruction steps, pay attention to the front and back of the parts and orientation and you're done.
Good luck completing your model!
Thank you again for choosing our models and for your support!
✨ Designed with Care — for Quiet, Meaningful Moments
Each kit is thoughtfully designed with meticulous attention to detail, precisely crafted, and safety tested. Our Book Nooks are more than craft kits—they open the door to magical miniature worlds, invite shared moments, and create lasting joy. A quiet adventure you’ll never want to take off your shelf.



