8194; The HB880 has an operating weight of 232 kg, works with flow rates from 30-65 l/min and provides a blow rate
from 755-1150 bpm for work on soft ground and a blow rate
of 860-1310 bpm when working on hard ground.
The Caterpillar H55Ds hydraulic hammer features a higher blow rate
and 25 percent more power, when compared to the previous model H50s, for superior production from a 436-pound work tool.
The introduction of an IR tunnel modifies sectional profile temperature gradient between the extruder exit and the UHF exit; as a result, higher temperature of the exposed portions has affected the expansion phase through an earlier skin consolidation and a higher average blow rate