Designed for: oxy-acetylene heating for surface hardening of cog-wheels and racks with a 12mm pitch module, the coolant liquid (water or emulsion) being fed to the heating area.

Designed for: oxy-acetylene heating for surface hardening of cog-wheels and racks with a 14mm pitch module, the coolant liquid (water or emulsion) being fed to the heating area.

Designed for: oxy-acetylene heating for surface hardening of cog-wheels and racks with a 16mm pitch module, the coolant liquid (water or emulsion) being fed to the heating area.

Designed for: oxy-acetylene heating for surface hardening of cog-wheels and racks with an 18mm pitch module, the coolant liquid (water or emulsion) being fed to the heating area.

Designed for: oxy-acetylene heating for surface hardening of cog-wheels and racks with a 20mm pitch module, the coolant liquid (water or emulsion) being fed to the heating area.

Designed for: oxy-acetylene heating for surface hardening of cog-wheels and racks with a 22mm pitch module, the coolant liquid (water or emulsion) being fed to the heating area.

Designed for: oxy-acetylene heating for surface hardening of cog-wheels and racks with a 25mm pitch module, the coolant liquid (water or emulsion) being fed to the heating area.