URBAN EM70 with Big-Bag bagging

The electric motor

The drive is powered by a three-phase electric motor SIEMENS with a power output of 5.5 kW (rated current 11 A, socket 16 A). The motor´s output is transferred via V-belts to the oil filled gearbox which drives the blade rotors.  Upon request, a logger can be equipped by hour meter.

The Machine handling

The logger is equipped for ease of handling by handle on the hopper and by 4 wheels for manual handling. (2 fixed and 2 swivelling with brakes).

The Big-Bag bagging device

It is used aerated large-size bags of 90 x 90 x 100 cm. The Big-Bag using is faster because bags do not have to be changed so often compared to smaller raschle bags. The adjustable arms of bagging device are retractable.

The inlet hopper

The hopper is long enough to provide safety and is equipped with a safety shut-off frame, which by pressing down stops the engine. The inlet hopper is oriented horizontally, which greatly facilitates insertion of long branches compared to the vertical or sloping hopper. Surface treatment of the whole machine is made with powder paint.

The Overload protection

The logger is protected against overloading by the thermal protection of motor and by disc springs located on the torsion arm, which when compressed allow the belt to slip and stop the logger. If they do, the knife blades will be usually bite in the branch and can not be freely removed from the hopper. The supplied lever is used to release it. Release the branch by clockwise lever rotating. 

The chipping device

The working principle of branch loggers URBAN lies in two counter rotating shafts with knives. The rotating knives draw in the wood material into the feed hopper unassisted. The passage gap between the shafts is 70 mm. Each shaft has 3 fixed knives, made from high quality tool steel. It is possible to resharpen the knives repeatedly. After sharpening there is a pad to be put under the knives in order to keep the same gap between the knives (c. 0,1 mm). One single sharpening of knives is capable of producing from 100 to 500 solid meters of small logs, depending the level of contaminants (mud, nails, stones etc.). Each blade can be sharpened up about 4 mm, then it must be replaced with a new one.