Browse Categories

Compact Vacuum Arc Melting System with Vacuum Casting Mold for 6mm Dia. Rod - EQ-SP-MSM208

Please email for lead time
Item Number: SP-MSM208
EQ-SP-MSM208 is a compact vacuum arc melting furnace with a Vacuum Suction Casting mechanismSuch a unique feature can produce cast products ( 6mm Dia. rod shape, up to 30g) by drawing the molten metal into the bottom cold copper casting mold.  The sucking force applied results in a fast-moving and cause the rapid solidification of the melt which is ideal for reducing the shrinkage cavity defects. The machine also features a built-in mechanical manipulator for tilting and rotating metal ingots if the re-smelting process is needed. The SS304 chamber ensures a clean and healthy atmosphere suitable for the most demanding experimental requirements.  ( Sealing tube option added on Dec 12, 2018)


  • Utilize the vacuum force to draw melt into the casting mold at the bottom to form a 6mm Dia. rod.
  • Designed for melting samples < 10g iron-based alloy up to 3000 °C under tiny positive pressure or low vacuum
  • Water-cooled SS vacuum chamber, electrode, and copper crucible allows arc melting of multiple samples without cross-contamination
  • Powerful arc melting power supply enables reliable, stable arc ignition
  • Easy electrode tilting and height adjustment via a handwheel
  • A built-in mechanical manipulator for tilting and rotating samples without breaking the vacuum
  • A tinted observation window on the front for monitoring the melting process
           Casting Module       Chamber Door       Front Window       Flashlight Insert        Manipulator
Vacuum Chamber
  • Water-cooled vacuum chamber with dimensions of Φ 182 mm × 225 mm H
  • A Φ120mm front door for easy sample loading and retrieving
  • A tinted observation window on the front for monitoring the melting process
  • A built-in mechanical manipulator for tilting and rotating samples without breaking the vacuum
  • Material: Made of SS304 Steel
Vacuum Suction Casting & Copper Crucible 

  • Vacuum suction casting 6mm Dia. rod, 30g max.  ( 3 - 8 mm casting mold is available upon request ). Please see picture 2 for 3 mm x 70 mm rod
  • The sucking force is generated by evacuating the bottom cold copper casting mold. This results in rapid solidification of the melt which is ideal for reducing the shrinkage cavity defects 
  • One solenoid valve is built-in for sucking operation
  • The water-cooled copper crucible has 7 cavities:
  • Central cavity (35mm dia. x 10mm depth) is for vacuum suction casting
  • The other six-round cavities (25 mm Dia. × 8 mm depth) are reserved for metal alloy pellet preparation, max. 10g
  • Optional:  You may modify crucible in 70 mm Dia. to melt and casting  max.100 g ( Fe based alloy)
  •  pic 1   pic 2       pic 3
Vacuum Pressure Gauge

Vacuum Pump (Optional)
  • The vacuum level is dependent on the vacuum pump used:
    • 10^-3 torr via a mechanical/roughing pump. (Roughing Pumps
    • 10^-5 torr via a turbopump. 
  • Using a gas purification system ca keep oxygen < 1 ppm, which is equal to 10-6 torr vacuum
Power Supply  

  • Input voltage: 110 or 220 VAC selectable, single phase
  • Input current: 34A max. (One 40A breaker is installed in the power supply. Recommended wall breaker amp ≥ 40A)
  • Output DC output:
    • 15 V / 125 A at 35% duty cycle - 110 V input ,  
    • 18 V / 185 A at 35% duty cycle - 220 V input
  • Minimum DC current output: 5 A
  • Pulse DC and AC output modes available
  • Foot pedal control of the output current
Tungsten Electrode

  • 4 mm Dia. tungsten electrode with water coolingNon-consumable tungsten arc stinger
  • Easy electrode tilting and height adjustment (30 mm max) for multiple-cavity melting
  • Capable of melting samples < 10g up to 3000 °C, which can melt all types of metals
  • Pic. A is a 4.5 g tungsten melt drop 
  • Pic.B is a 10 g tungsten melt drop
               A.4.5 g       B.10 g                
Option at extra cost
  • If you choose a larger copper crucible with  55 Dia x 10D (mm) as the pic below (Pic.1-3), with a modified electrode tip 300A power supply, the furnace can melt and cast 50 g SS304.  Please contact MTI to request a quote.
  • The furnace can be used for sealing Ta or any alloy tube by optional rotation module as the Pic below  (Pic.4-7)
       Pic.1                     Pic.2                      Pic.3                                Pic.4                                  Pic.5                               Pic.6                          Gif.7
Water Chiller & Gas (Optional)
  • Water cooling is required (not included) for the chamber, copper mold, and electrode. Please consider our KJ-5000 recirculating water chiller.
  • Water-tube for MTI Water Chiller is Size: 12mm O.D x 8mm I.D
  • High purity inert gas with at least 5N purity (>99.999%) is required (not included)
  • 5% Hydrogen + 95% Argon gas may be used to prevent oxidation during the melting process
Furnace Dimensions 

  • 540 mm W × 540 mm D × 920 mm H (exclude the power supply) 
  • Power supply dimension: 320 mm L x 185 mm W x 485 mm H
Net Weight
  • 50 kg
Shipping Weight & Dimensions
  • 500 lbs
  • 48" x 40" x 52"
  • CE certified
  • NRTL or CSA certification is available at an extra fee. Please contact us for the quote.
  • One-year limited warranty with lifetime support
Operation Manual & Video

Related Article
Application & Warning Notes

  • High purity 》5N Ar gas is required for the smelting operation. 
  • A two-stage pressure regulator must be installed on the gas cylinder to limit the pressure to below 3 psi for safe operation. Click here to learn the installation of a gas regulator (Pic.1)
  • To avoid any damages to the mechanical pump or turbopump, please install an Inline Particle Trap (maximum 1E-4 Torr vacuum with turbopump) on the pump inlet port (Pic. 2)
  • Must Wear Welder Glass or Auto Welding Shade while observing the Arc while welding. 
  • The unit is designed for arc melting operation under positive 0.01 MPa to negative 0.09 MPa pressure). Never operate the unit at a high vacuum or high positive pressure!
  • During melting operation, never allow the electrode to touch the material or the copper crucible! Do not operate the mechanical manipulator during the melting process.
  • Option: The user may use a quartz tube shielding to effectively reduce the splash and spilling while arc melting. Please click pic 3 to watch the demo video.
                1         2            3    

Related Products

Shopping Cart
Your cart is empty.
Please clear the browsing history before ordering the product. Otherwise, availability and price are not guaranteed.
Mailing Lists
MTI sponsorships:
MTI Sponsors Thermoelectrics Workshop

MTI-UCSD Battery Fabrication Lab

MTI-VISTEC Cylindrical Cell  Pilot Line

MTI Sponsors the Postdoctoral Awards

MTI KJ Group Files Lawsuit Against Shangdong Gelon LIB Group for Copyright Infringement of MTI products and Manufacture & sale of counterfeit goods 

MTI and Celgard have successfully reached a settlement under court for the litigation on patent and trademark

Upcoming Shows:

Recent Attended Shows:
IMAT Virtual Edition October 26 - 28

TMS 2020 Feb 23 - 27 San Diego CA Booth 700

AABC Europe Jan 12 - 16 Wiesbaden Germany

Click here to see our past conferences


1. Prices listed online are valid for the US market and who pay by credit card only. There will be extra charges for shipping & handling. Price various from country to country.
2. We may add extra charges for paper order and net30 terms due to extra labor costs.
3. The prices listed are subject to change without notice.