ALUMINUM GAS -
ROUND CRUCIBLE MELTING FURNACES
GM-A SERIES
Our versatile GM-A Series is a traditional stationary round crucible furnace and is suitable for a wide variety of casting and melting applications. A unique feature is the heat recycler that is used during startup to increase efficiency. Economically priced, this furnace is easy to install and simple to run. Like all our furnaces, the GM-A Series is controlled by a PLC and a color HMI touch screen.
TECHNICAL OVERVIEW
The GM‑A Series is a traditional stationary round crucible melting furnace designed for versatility, simplicity, and long‑term reliability. It is suitable for a wide range of aluminum casting and melting applications, making it an excellent choice for foundries, die‑casting plants, and small to medium aluminum processors. A standout feature is its startup heat recycler, which improves thermal efficiency and reduces fuel consumption during initial heat‑up. The furnace is economically priced, easy to install, and simple to operate — yet still equipped with modern automation, including a PLC‑based control system and a color HMI touchscreen for precise temperature and burner management. This combination of affordability, efficiency, and user‑friendly operation gives the GM‑A Series one of the highest returns on investment in its class.
Stationary crucible furnaces offer clean melting, stable temperature control, and low oxidation — all essential for producing high‑quality molten aluminum. Unlike open‑flame or reverberatory systems, the crucible isolates the metal from direct burner contact, reducing contamination and minimizing dross formation. The GM‑A Series enhances these advantages with its efficient combustion system and heat‑recycling startup feature, which improves fuel economy and shortens warm‑up times. Because the furnace is stationary, it has fewer moving components than tilting or automated systems, resulting in lower maintenance requirements and longer service life. For facilities seeking a dependable, cost‑effective melting solution with consistent metal quality, the GM‑A Series provides a strong balance of performance, simplicity, and operating efficiency.
The GM‑A Series is built around a durable round crucible design supported by a reinforced steel shell and thick refractory insulation for excellent thermal retention. Its high‑efficiency gas burner system ensures fast melting rates and stable temperature control, while the PLC and color HMI touchscreen provide intuitive operation and precise process management. The furnace’s heat recycler improves startup efficiency, reducing fuel usage and operating costs. Designed for maximum value, the GM‑A Series delivers more features and higher ROI than comparable furnaces in its class, offering dependable performance at a competitive price point. This makes it a practical choice for foundries and casting operations that require clean melting, low maintenance, and long‑term reliability.
HIGHEST RETURN ON INVESTMENT
We Give You More Furnace For Your Money.
To be competitive today’s economy requires that manufacturers run their operations more efficiently and cost effectively than ever before. We offer the highest ROI (return on investment) in the industry. Dynamo gives you high-quality products for a reasonable investment and with more features than any other company. Simply put, we give you the most for your money!
THICKER INSULATION
We Add Way More Insulation to Our Furnaces Than Most Manufacturers.
The result is even greater efficiency and a solid, sturdy construction which is hard to beat.
High Thermal Efficiency BY DESIGN
We Add Significantly More Insulation to Our Furnaces Than Most Manufacturers.
The result is excellent efficiency which reqires less gas per ton of aluminum, and is less expensive to operate. More insulation also makes the furnaces safe to touch.
CHOOSE YOUR CONTROL SYSTEM
We Give You Options of PLC & HMI.
Select the control system that is best for you and easiest for your maintenance team.
EASY TO OPERATE INTERFACE
Greater Control - Means Greater Efficiency.
Our GM-A Series melting furnaces feature state-of-the-art PLC control with large color HMI screens with easy-to-read graphics - all at no extra charge. See in real time all furnace functions and change any setting on the fly. Now that's control. Screen shown with optional upgraded Siemens control system.
VFD DRIVE BLOWER MOTORS
Better Efficiency and Lower Operating Cost.
Lots of air without control wastes a significant amount of energy. We use VFD Drives combined with Premium Inverter Duty Motors to give you greater RPM only when it is needed. All this translates into greater efficiency, lower operating costs, quieter operation, soft start and longer motor life. The advantage is clear. This is just one of the many ways we use to increase furnace efficiency, and reduce long term operating costs.
HIGH QUALITY COMPONENTS
We Use Brand Name Components You Know and Already Use.
We use only the finest quality components that are open source and readily available locally in your area, or from our online parts store.
REMOTE SERVICE
We Can Remotely Troubleshoot Your Furnace from Our Facility.
As an option, our GM-A Series crucible melting furnaces can include a Remote Connectivity Unit which allows our furnace technicians to remotely check the performance of the furnace, make any needed changes to the program or HMI, or to troubleshoot it directly from our service center. The customer is only required to connect the unit to the Internet via an Ethernet cable. We handle the rest.
INDUSTRY 4.0 REMOTE MONITORING
Remotely Monitor Your Furnace Performance From Any Device.
TEN STANDARD SIZES
Flexible Range of Applications.
Available from 77 lbs melting per hour all the way to 770 lbs, the GM-A Series round crucible melting furnaces allow for a wide range of applications.
| Item | US Standard (Al) | Metric Standard (Al) | ||
| Model | Holding | Melting/h * | Holding | Melting/h * |
| GM-A-220 | 220 lb | 77 lb | 100 kg | 35 kg |
| GM-A-330 | 330 lb | 110 lb | 150 kg | 50 kg |
| GM-A-550 | 550 lb | 187 lb | 250 kg | 85 kg |
| GM-A-660 | 660 lb | 220 lb | 300 kg | 100 kg |
| GM-A-770 | 770 lb | 265 lb | 350 kg | 120 kg |
| GM-A-880 | 880 lb | 300 lb | 400 kg | 140 kg |
| GM-A-1100 | 1100 lb | 397 lb | 500 kg | 180 kg |
| GM-A-1300 | 1300 lb | 440 lb | 600 kg | 200 kg |
| GM-A-1750 | 1750 lb | 550 lb | 800 kg | 250 kg |
| GM-A-2200 | 2200 lb | 770 lb | 1000 kg | 350 kg |
DO YOU NEED A DIFFERENT SIZE?
Let Us Make One for You.
Tell us your requirements and we will be glad to work with you to give you exactly what you need.
Applications For The GM-A Series Aluminum Crucible Melting Furnace
The GM‑A Series is ideal for foundries that require clean, consistent melting performance with minimal oxidation and stable temperature control. Because the aluminum remains inside a silicon‑carbide or graphite crucible, the molten metal is shielded from direct flame contact, reducing contamination and improving melt cleanliness. This makes the GM‑A Series a strong fit for small and medium foundries producing high‑quality castings where metal purity directly affects product performance, scrap rates, and downstream machining efficiency.
The GM‑A Series provides a dependable molten aluminum supply for gravity casting, sand casting, and permanent‑mold casting operations. Its stable temperature control and clean crucible environment ensure consistent metal quality, which is essential for producing dimensionally accurate, defect‑free castings. The furnace’s compact footprint and simple operation make it easy to integrate into existing casting workflows, supporting both manual ladle pouring and semi‑automated metal‑handling systems.
The GM‑A Series is well‑suited for feeding small high‑pressure die‑casting (HPDC) and low‑pressure die‑casting (LPDC) machines. Its fast heat‑up capability and stable temperature control ensure that die‑casting cells receive clean, consistent molten aluminum throughout the shift. The crucible design minimizes oxidation and dross formation, improving casting quality and reducing porosity‑related defects. This makes the GM‑A Series a practical melting solution for small die‑casting operations or satellite casting cells.
Crucible furnaces are widely used for alloy preparation and melt conditioning because they provide a stable, low‑turbulence environment. The GM‑A Series allows operators to add alloying elements, perform degassing, and maintain precise temperature control before transferring metal to casting equipment. The crucible’s protective environment minimizes oxidation during alloying, resulting in more uniform composition and improved metallurgical quality. This makes the GM‑A Series ideal for producing high‑performance aluminum alloys used in automotive, aerospace, and industrial applications.
The GM‑A Series is an excellent choice for research labs, prototype shops, and low‑volume production environments that require clean molten aluminum in small batches. Its compact size, fast melting capability, and precise temperature control make it ideal for testing new alloys, validating casting designs, or producing short‑run components. Facilities benefit from lower operating costs, reduced metal loss, and the ability to melt small quantities without the overhead of a large industrial furnace.
The GM‑A Series efficiently melts a wide range of aluminum feedstock, including ingots, sows, and clean scrap. The crucible design ensures uniform heat transfer and stable melting performance, even with varying charge sizes. Because the metal is contained within the crucible, oxidation is minimized and melt quality remains consistent. This makes the furnace suitable for operations that rely on both primary and secondary aluminum sources while maintaining strict quality standards.
The GM‑A Series is ideal for facilities that need a reliable melting furnace with minimal maintenance requirements. Its stationary design has fewer moving components than tilting or automated systems, resulting in lower long‑term maintenance costs and improved uptime. The PLC‑based control system and color HMI touchscreen simplify operation, making the furnace easy to run even for small teams or facilities with limited technical staff. This makes the GM‑A Series a practical, dependable melting solution for small foundries, job shops, and casting operations.
The GM‑J Series is built for continuous operation, making it ideal for plants that run extended production cycles. Its heavy‑duty refractory lining, high‑efficiency burners, and robust tilting mechanism ensure stable performance with minimal maintenance interruptions. This reliability is essential for facilities that cannot afford downtime, such as automotive casting plants, large foundries, and high‑volume aluminum processors. The furnace’s ability to maintain consistent melt quality over long periods enhances overall process stability and production efficiency.
Frequently Asked Questions About The GM-A Series Aluminum Crucible Melting Furnace
A stationary crucible furnace provides clean melting, stable temperature control, and low oxidation — all essential for producing high‑quality molten aluminum. Because the metal is contained inside a silicon‑carbide or graphite crucible, it is shielded from direct flame contact, reducing contamination and minimizing dross formation. The GM‑A Series enhances these advantages with its efficient burner system, thick refractory insulation, and a startup heat recycler that improves thermal efficiency during warm‑up. For facilities seeking a dependable, cost‑effective melting solution with consistent metal quality, a stationary crucible furnace offers an excellent balance of simplicity, reliability, and performance.
The GM‑A Series is designed to melt a wide range of aluminum feedstock, including ingots, sows, and clean scrap. Its crucible‑based design ensures uniform heat transfer and stable melting performance, even with varying charge sizes. Because the molten aluminum remains isolated from direct burner contact, oxidation is minimized and melt quality remains consistent. This makes the GM‑A Series suitable for operations that rely on both primary and secondary aluminum sources while maintaining strict quality standards.
The crucible acts as a protective barrier between the molten aluminum and the combustion environment, significantly reducing oxidation and dross formation. The GM‑A Series uses a closed‑door melting process and optimized burner placement to maintain a stable, low‑oxygen environment inside the furnace. The startup heat recycler improves thermal efficiency and reduces temperature fluctuations during warm‑up, further enhancing melt stability. These features allow the GM‑A Series to consistently produce clean, high‑quality molten aluminum suitable for demanding casting applications.
Yes — the GM‑A Series is well‑suited for continuous melting in small and medium‑scale production environments. Its efficient burner system, durable crucible materials, and robust refractory insulation support long operating cycles with stable temperature control. While stationary crucible furnaces are typically used for lower‑volume applications compared to large reverberatory or tower furnaces, the GM‑A Series provides reliable, repeatable performance for gravity casting, sand casting, permanent‑mold casting, and small die‑casting cells that require consistent melt quality throughout the shift.
Yes — GM‑A Series aluminum crucible melting furnaces are available throughout the United States, Canada, and Mexico. Foundries, die‑casting plants, and aluminum processors across North America rely on these furnaces for clean melting, stable temperature control, and low operating costs. Regional availability ensures faster delivery, dependable technical support, and access to replacement parts. Units can be configured with various crucible sizes, burner systems, and automation options to meet specific production requirements.
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