Blank Firing Busts Hydraulic Hammers

September 28, 2010

Tramac urges hammer operators to avoid blank firing at all times. Blank firing happens when the tool slips off the material to be broken or the material separates, but the breaker keeps firing. The piston hammers the tool while it is not preloaded against material that can absorb the shock.

The piston hits the tool shank with full impact. Shock waves bounce back up through the tool, colliding violently with other shock waves still traveling down it. Tramac says the disorganized energy causes extensive wear to the tool, retainers, piston, chuck housing, and tie rods.

To avoid blank firing, operators must learn to anticipate the break—to stop firing the hammer just before the broken material falls to pieces.