site name Bruks-Siwertell

Drum chipper (gravity)

drum chipper gravity bruks siwertell

Back to Chipping

Optimized solution for chipping short wood waste

Bruks drum chippers with vertical drop-feeds are the optimum solution for chipping short logs. They are also used as re-chippers, Bruks Klöckner re-chipper, to reduce oversized chips after a screening process.

The wood chips from our machines can be used for high-quality applications in pulp mills as well as by the veneer industry, particle board producers and as microchips for direct drying in pellet mills. Our drum chippers can process the most difficult-to-handle, contaminated cheap wood and produce a quality end product that can be used for energy-generation.

Bruks Drum chipper gravity

Highest number of chips per hour for the lowest production costs

Our drum chippers deliver quality wood chips for a long service life, offering owners maximum chips per machine hour for the lowest production costs possible.

Drop-fed drum chippers are available for small residue processing units up to large-scale units producing wood chips at a rate of between 10 to 1,000m3 of chips per hour, with drive units from 22 to 500kW.

As standard, chip length is adjustable between 20 and 35mm and other chip lengths are accommodated with special designs. Their size is determined by the number of chipping knives, the screen geometry as well as the chipping speed. Controlling these elements ensures the production of uniform chips.

The chips are discharged from the base of the machine at an upward angle, depending on chipper type. To eliminate oversized chips, the discharge opening is fitted with a screen.

Minimizing maintenance, maximizing safety

Around the chipper knife, all parts are easily accessible and exchangeable, cutting downtime to a minimum. Knife length is adjusted prior to fitting, eliminating the need for knife adjustments in the chipper.

Some of our chippers are fitted with a swing-away anvil holder and bolted anvil. The anvil holder has two mounting points: one pivoting and one with a shear bolt that breaks if metal has accidentally been fed into the machine. This causes the anvil holder to swing down and prevent any serious damage to the rotor, anvil and chipper frame.

Both the high-quality steel chipping and counter-knives can be reground several times for cost-efficient operations.

Clamping plate

Image: The clamping plate is secured in the rotor body for quick, easy and safe knife change

operating unit

Image: The operating unit is equipped with safety and maintenance functions

Wear plate

Image: The wear plates on the wear plate rotor are replaceable and turnable, and placed underneath the chipping knives to reduce wear in the chip pockets

ware plates

Image: The wear plates on the counter knife holder are bolted and replaceable, as well as partly able to extract

Technical data

Type Infeed with (mm) Rotor ø (mm) Motor power (kW)
DG 200 400, 600 450 22 - 55
DG 300 600, 800 580 37 -132
DG 300 540 600 37 -75
DG 365 560, 825 800 55 - 2 x 132
DG 400 600, 800, 1000 700 55 - 160
DG 500 1000, 1200 1000 110 - 250
DG 540 680 1160 90 - 250
DG 600 1200, 1600 1300 132 - 2 x 250
DG 650 870 1500 160 - 450

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