Hydraulic Bar Cropper
power tool to cut the old ladder supports from sewer access shafts
to within 5 mm of the wall. The material is 12 x 50 mm mild steel
flat bar which is set into the access shaft walls. The cutting is
necessary to remove the ladders for replacement when they are no
longer safe to use.
the cutting was done with pneumatic hacksaws; oxy/acetylene and
friction blades are unsuitable because of the explosive
machine is actuated by an ENERPAC hydraulic hollow cylinder powered
by a servo controlled air/hydraulic pump.