ALUMINUM GAS -
ROUND CRUCIBLE MELTING FURNACES
GM-A SERIES
The GM-A Series is a gas-fired aluminum stationary crucible furnace for foundries and casting cells that need manageable aluminum batches without furnace tilting. Its round crucible supports melting and holding before metal is removed by a suitable pouring or transport ladle. A startup heat recycler, gas burner, PLC and color HMI support the operating cycle. Select crucible size and melt rate around the charge, alloy schedule and downstream casting demand.
TECHNICAL OVERVIEW
GM-A is a gas-fired stationary crucible furnace with a round crucible for aluminum batch melting. The published model range lists both melting rate and holding capacity, so it can also serve as a stationary crucible melting and holding furnace when the operating schedule fits. Its startup heat recycler is intended to improve efficiency during warm-up; actual fuel use depends on charge, duty cycle and plant conditions. PLC and color-HMI controls support temperature and burner management.
When molten aluminum is removed with a ladle instead of tilting the furnace, GM-A works as a gas-fired crucible bale-out furnace. This stationary crucible bale-out arrangement can suit a foundry that already has a planned ladle-transfer route. Compare it with the GM-B gas-fired tilting crucible furnace when hydraulic pouring is required, or the EM-B electric dip-out crucible furnace when an electric heat source and square crucible are preferred. Choose by utilities, batch size, transfer method and guarding, not by furnace name alone.
The GM-A uses a gas-heated round crucible, reinforced steel shell, refractory insulation and a startup heat recycler. As a fuel-fired crucible furnace, its gas burner supplies heat while the crucible keeps the aluminum separate from direct burner contact. Size the crucible and burner to the planned melt rate and holding reserve. External surfaces can become hot; insulation is not a substitute for guarding, clearance and operator hot-surface precautions.
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.
Thick insulation helps reduce heat loss and external shell temperature. Actual surface temperature depends on operating conditions, so the furnace must be treated as a hot surface and operators should follow the site safety procedure.
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.
For gravity, sand and permanent-mold casting, GM-A can melt and hold an aluminum batch before an operator removes metal with a suitable pouring ladle or transport ladle. The ladle-transfer route should be planned for vessel size, reach, temperature loss and safe access. This bale-out aluminum furnace configuration is different from hydraulic tilting, which may suit larger or more frequent controlled pours.
GM-A can be evaluated as a machine-side stationary crucible furnace for small HPDC or LPDC operations where batch size and ladle transfer fit the casting schedule. As a die-casting line crucible furnace, it should be sized from actual hourly demand, holding reserve and transfer distance. Unlike the GM-E mini stack, GM-A does not use a shaft charge-preheating path; unlike GM-B, it does not tilt hydraulically for pouring.
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.
GM-A can melt suitable aluminum ingots and clean, prepared returns in a round crucible. Feedstock dimensions, cleanliness and charging practice must match the selected crucible and the approved operating procedure; not every sow or bulky scrap form will fit. Keeping metal in the crucible separates it from direct burner contact, but melt quality also depends on charge condition, temperature control and treatment.
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.
GM-A is a stationary aluminum crucible melting furnace for small foundry teams that value a straightforward gas-fired batch system. Its fixed furnace body avoids the hydraulic tilt mechanism used on GM-B, but ladle handling still requires a safe transfer plan. Compare crucible capacity, burner service, insulation, operator access and controls against the real shift demand. For the wider equipment choice, see the small-foundry furnace selection guide.
Frequently Asked Questions About The GM-A Series Aluminum Crucible Melting Furnace
A stationary aluminum crucible furnace keeps the metal in a round crucible while a gas burner heats the vessel. It suits batch melting and holding when metal can be removed by a planned ladle route. GM-A avoids a furnace-tilting mechanism, while GM-B offers hydraulic tilt for controlled discharge. Compare charge, melt rate, holding reserve, utilities, ladle access and safety requirements before selecting either model.
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.
GM-A can support repeated batches and holding during a shift when the selected model has enough melt rate and reserve for the casting demand. It is not the default choice for high-volume central supply to many cells; tower or reverberatory systems should be compared for that duty. Size the furnace from average and peak hourly consumption, recovery time, alloy schedule and planned interruptions.
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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