URBAN TR110 with Big-Bag bagging

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 Big-Bag (also full) could be lifted by tractor during moving in forest. The adjustable arms of bagging device are retractable and in the transport position does not exceed the contours of the tractor in the transport position.

The inlet hopper

The inlet hopper consists of a fixed and a folding part. The folding part of the inlet hopper gives a narrower profile in the transport position (does not exceed the contours of the tractor in the transport position).  Once is locked in the working position the hopper ensures optimised branch intake and operational safety. Additionally, the hopper is fitted with a safety cut-out frame, which by pressing down stops the chipping device. 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 connection to tractor

The minimum recommended power of the tractor is 50 hp. The optimum tractor power is 70 hp or more. A tractor with this power can run at a low speed during chipping (about 1300 rpm). The tractor's output shaft is rated at 1000 rpm (the output shaft can be rated at 540 rpm but the branch feeding would not work properly). The tractor power is transferred by a PTO with an overload clutch (it is a part of the machine) to the oil filled gearbox, which drive the logging device.The overload clutch is set to torque 1600 Nm . The overload clutch protects tractor and logger against overloading.

The flywheel

The flywheel absorbs shocks transferred to the PTO and to the tractor gearbox. The machinery is standardly supplied without flywheel. The flywheel can be ordered as an optional accessory

The adjustable frame

The adjustable sliding frame of the machine allows connection to various types of tractors while maintaining the optimal angles of the cardan.

The safety chains / Sliding legs

The logger is lifted to the tractor hydraulics at the same working height (not on the ground) during working or moving. It is used the safety chains to assure machine in that optimal position or it can it can be laid on the ground on two adjustable legs  The safety chains and sliding legs are standard of logger.

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 110 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 150 to 800 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.

The tow hitch

The Branch loggers attached behind the tractor can tow a trailer with a regular tow hitch or a tow ball ISO 50. The maximal weight of trailer is 2000 kg.