The Mettle Works     

Induction Forges and Heating Machines
The same reliable machines sold by Grant Sarver.


InductionForges.com

Tools and Supplies 

             

The SP-15A

The SP-25A

Comparisons and customizing

Water Coolers

Accessories

About Induction Heating

Warranty

How to Order


The SP-15A a 208-240v Single Phase Machine
With enough capacity to heat 1.5" bar stock.

SPA-15

Specifications:

★ Input voltage : Single-phase 208-240V, 50 or 60 HZ
★ Max input current : 32A,
★ Output Oscillation Frequency : 30-100KHZ
★ Solid State Power
★ Duty cycle : 80%
★ Max input power : 7KW,
★ Minimum water cooling required: 10,500 btu, 1.3 gal/min (0.2Mpa, 5 L/min)
★ Dimensions: 18 x 8 x 17" - 44lbs (46 x 20 x 44cm - 20kg)

PDF spec sheet.



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The SP-25A a Three Phase Machine in either 208-240v or 440v
With enough capacity to heat 2.5" bar stock.

SPA-15

Specifications:

208-240V 3-phase, 50 or 60 HZ
★ Max input current :'40A,
★ Duty cycle : 80%
★ Output Oscillation Frequency : 30-80KHZ
★ Solid State Power
★ Max input power : 15KW,
★ Minimum water cooling required: 22,000btu, 3 gal/min (0.4Mpa, 10 L/min)
★ Dimensions: 18 x 8 x 17" - 44lbs (46 x 20 x 44cm - 20kg)

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★ : 440V 3-phase, 50 or 60 HZ
★ Max input current : 22A,
★ Duty cycle : 80%
★ Output Oscillation Frequency : 30-80KHZ
★ Solid State Power
★ Max input power : 15KW
★ Minimum water cooling required: 22,000btu, 3 gal/min (0.4Mpa, 10 L/min)
★ Dimensions: 18 x 8 x 17" - 44lbs (46 x 20 x 44cm - 20kg)


How do you compare these Machines?
Here are a couple videos heating the same 1.75" bar with an SP-15A and a 440v SP-25A.

As you can see, the SP-15A altough rated at 1.5" heats the 1.75 bar quite effectively though the extra 21% mass slows it some and part of the heat has time to conduct away due to the longer heat time. The 440v SP-25A on the other hand, heats the surface of the bar so quickly that it starts to melt, one would have to either keep the part moving under the coil or turn down the field to keep it from overheating like that.

All off these machines may be custom configured for your specific use.
For example: This machine has a separate transformer unit to isolate excess heat from the electronics.

SP-25ABD an Industrial 100% duty cycle 25KW Machine with built in timer

SPA-25abd

Specifications:

★ : 440V 3-phase, 50 or 60 HZ
★ Max input current : 33A,
★ Duty cycle : 100%
★ Output Oscillation Frequency : 30-80KHZ
★ Solid State Power
★ Max input power : 25KW,
★ Minimum water cooling required: 22,000btu, 3 gal/min (0.4Mpa, 10 L/min)
★ Cable length: 6.5 ft / 2 m
★ Dimensions:    Main unit: 24 x 12 x 10.5" (60 X 26 X 50cm) - 62lb / 28kg
   Transformer: 18.5 x 10.5 x 14" (47 X 27 X 35cm) - 57lb / 26kg



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Water Coolers

These Machines require water heat exchange cooling units, we recommend Tig coolers with 15000 btu capacity for the small machine and 30,000 btu for the larger. We now handle DynaFlux tig coolers and can provide package deals.


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Accessories

Additional heating coils and metric flare nuts for making your own are available.
(regular flex copper from the hdwe store will work with them)




Flexible Wands and custom coils.

Stock Items

(SHIPPING COSTS for small parts ordered are added to your total by Paypal)

Supplies to make your own coils.

Coil kit components
Coil making kit:
Fluxless silver solder, 8mm Flare nuts, Flared tubes, 3/16 tube for the coil, Woven Ceramic tube slides over 3/16 tube, it withstands radiant heat from hot steel and helps prevent accidentally shorting out the work to the coil. ,
$29.99 each
8mm Flare Nuts
8 mm Flare nuts (connect the coils to the machine)
these fit 5/16 std copper refrigeration tubing
$2.99 each
ceramic fiber tube shown over copper tube
Ceramic fiber fabric tube inulation for 3/16" to 1/4" copper tubing. 6mm $1.35/ft
Ceramic Fiber fabric tube inulation for 5/16"to 3/8" copper tubing. 10 mm $1.59/ft
Ceramic fiber insulating tape on 3 inch core 10mm tape $67.00
20mm tape $89.00
32" Flexible wand adaptor
(flat coil sold separately)
$379.99

Flat coil A.
3x3 coil with mica/ceramic sheet insulator
$89.99
Flat coil B.
4x2.5 coil with mica/ceramic sheet insulator
$109.99
8mm Flare Wear Fittings
Wear Fittings
8mm Flare fittings with O rings fit onto your machine and take the abuse of changing coils.
$10.99 / pair
Foot Pedal (not shown)
Replacement Foot Pedal with cord and connector.
$39.99


Induction Heating

Induction Heating is a time tested way of heating metals and other things.
It is used for, forging, melting, brazing, heat treating, and other things, even cooking.
It takes changing magnetic fields, like those that make a transformer work and applies them over and over again at high frequency to generate low voltage high amperage currents which exceed the conductivity of the part being heated. The electrical resistance in the part causes it to heat up when the generated current tries to flow. It is very good for spot heating. It has no flame and can be used in an inert atmosphere, making it ideal for heating, brazing, melting, forming materials without the formation of slag or scale. .


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Warranty

As Grant Sarver and Larry Langdon have done before me, we guarantee these machines under normal use for replacement parts and labor for one year from purchase .


How to Order These Machines

Email Gene Olson Orders are 50% down, 50% when shipped. plus ground freight to your door. Lead time is around 3 weeks. Sometimes we have one of the smaller machines in stock.


 




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Questions?? Comments!! - Email me gene (at) mettleworks.com
Thanks for your feedback.





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