The hydraulic counterblow hammer GH is considered for heavy parts demanding blow energies of more than 160 kJ.

LASCO was pioneer and inventor of the hydraulic drive system for die forging hammers.

Counterblow hammers have an upper and a lower ram, which are accelerated towards each other. The ratio of mass of upper and lower ram is between 1:4 to 1:5 depending on the hammer size.
As a result, the lower ram moves between 4 to 5 times more slowly than the upper ram, delivering an impact speed of about 6 m/s.

Construction features:

• Accurate repeatability of blow energy
• Low energy costs compared with air driven units
• Automation facilitated by the small stroke and the slower speed of the lower ram
• May be mounted on direct spring damping elements
• Hydraulic drive in block design in the hammer head
• Programmable control system with operator guidance, product data administration and modem for remote diagnostics