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Induction Valve Seat Removal (IVSR) Systems

Non-contact, Flameless Induction Valve Seat Removal (IVSR) and Powertrain Reman Systems

Ajax TOCCO Magnethermic’s IVSR systems have revolutionized heavy-duty engine remanufacturing operations, specifically in the time-consuming task of removing pressed-in valve seats from engine cylinder heads. Ajax TOCCO’s IVSR process has increased the profitability of engine reman facilities globally, while simultaneously increasing quality, efficiency, core retention rates, operator safety, and ergonomics. Our IVSR technology is so effective, valve seats can be easily removed with minimal force, saving valuable time and money. By way of induction, valve seats are heated and cooled in seconds, resulting in the mechanical shrinking of the pressed-in seats. No subsequent machining is needed for valve seats or seat recesses, which means the valve seats can be replaced over and over, extending the life of the cylinder head.

  • Eliminates open flame, cutting, welding, and kinetic force
  • Increases core recovery rates
  • Eliminates collateral damage to heads
  • Increases production rates
  • Reduces time-consuming machining and labor hours
  • Improves operator comfort and safety
  • Compatible with all cylinder head makes and models, including passenger car engine applications, from aluminum to cast iron

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Providing Heat Treating Solutions Since 1916

Focused, Selective Non-Contact Electromagnetic Heating Only Heats Valve Seats

Ajax TOCCO’s exclusive IVSR induction heating technology only heats the valve seat without directly heating the cylinder head as seen in this thermal image.  Seats are heated in just a few seconds while the cylinder head remains cool.

ValveSeat Selective Heating Thermal Image

Precision Fabricated Inductors and Tooling with the process “Built-In”

Operator-friendly ergonomic tooling with the “process built-in” improves operator comfort and efficiency. Repeatability is built-in with application-specific tooling eliminating guesswork and ensuring application success.  Heating inductors are built using the latest manufacturing techniques including CNC machining and 3D additive-manufactured copper heating inductors. 

ValveSeat Inductor GH

Reduce force and time required to extract pressed-in valve seats

Once the seats are heated, and cooled, they permanently shrink, allowing much less force than would normally be required for removal.  In some cases, basic hand tools are all that is required to pull the seats.

ValveSeat Inductor GH


Ajax TOCCO Magnethermic Corporation Quality Certificate

Ajax TOCCO Magnethermic Corporation Quality Certificate

Dec 15, 2022 by Ajax TOCCO Magnethermic

Ajax TOCCO Looking For Growth In Reman Market

Ajax TOCCO Looking For Growth In Reman Market

Nov 29, 2017 by Ajax TOCCO Magnethermic

Ajax TOCCO Magnethermic, with more than 100 years of experience supplying heat treat equipment, is targeting the remanufacturing industry as a significant growth area.

Induction Fastener Applications

Induction Fastener Applications

Oct 19, 2018 by Ajax TOCCO Magnethermic

Induction Heating for Fastener Manufacturing Applications

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