Technical details

Hopper

The dimensions of the hopper satisfy the CE requirements.

The hopper is tapered to the infeed rollers. The upperside is „open“ whereby the sound level for the user is significant lower. Additional advantage is a low construction that is more safe during driving rearward.

Hopper


Infeed system 530 (XL), A540 and A425

Designed to grip and take away the most awkward material. Twin horizontal Feed rollers are timed through a precision gearbox which allows the rollers to lock together for maximum grip on small brashy material as well as large timber. A conventional chipper has a motor powering each feed roller – the Jensen has one motor which means the power to each roller is consistently strong whatever the material. For the A530 (XL), A540 and A425 the upper roller describes a radial movement. This means that the wood and branches are pushed to the outside of the flywheel. At this spot the peripheral speed of the flywheel is at the heighest.
Infeed system 530 (XL), A540 and A425
Infeed system 530 (XL), A540 and A425


Infeed system A328, A231 und A141 (XL)

Designed to grip and take away the most awkward material. Twin horizontal Feed rollers are timed through a precision gearbox which allows the rollers to lock together for maximum grip on small brashy material as well as large timber. A conventional chipper has a motor powering each feed roller – the Jensen has one motor which means the power to each roller is consistently strong whatever the material. For the A328, A231 and A141 (XL) the upper roller is able to oscillate: the upper roller adjusts itself to the diameter of the branches. This means that the infeed channel is always well filled with material whereby a high capacity is assured
Infeed system A328, A231 und A141 (XL)


Singel propulsion infeed system

Twin horizontal feed rollers are timed through a precision gearbox which allows the rollers to lock together for maximum grip on small brashy material as well as large timber.

Variable speed of feed rollers is controlled on a hydraulic valve block. Variable speed means these machines will feed fast and furious and you can adjust the chip size to meet your exact requirement.


Blades

Changing the blades is simple and saves costs.

The blades are placed in a 3º angle on the flywheel. This results in low wearing and a low power requirement.

The blades are fixed with hexagonal screws in the bore holes of the flywheel. A special construction on the flywheel supports the back of the blades to get a solid construction. After sharpening the knives several times the distance between blade and anvil is getting bigger because of the 3º angle. By using special shims it’s possible to move the knives custom fit an parallel to the anvil.

The blades have a double grinding angle. The first angle of the blade splits and the second angle cuts the wood. This results in a lower sound level an less power requirement.
Blades


Flywheel

Outstanding performance on clearing chip. Two blades which cut the full width of the timber mounted on a large flywheel with open tops means there is nothing to hinder the chip leaving the flywheel. Four full width draught fins pick up the material and throw it out of the chamber rather than relying on air to blow the chip. This means clearing green, wet material is simply not a problem and blockages are virtually unheard of.



Flywheel


Flywheel and infeed rollers

The combination of the construction of these main machine parts effect a maximal capacity at a low power requirement.

Throught fixing extra weights on the flywheel just behind the blades, the flywheel gets a high kinetic energy (boost) after the knive has cut the wood. The infeed rollers are mould out of one piece of high quality steel. Because of this the rollers can be grinded or can be welded of a layer of material. The hight weight of the rollers result in a aggressive infeed.

Description A 530 (XL) A 540 A 425 A 328 A 231 A 141 XL
Weight of the flywheel 70 kg 120 kg 150 kg 170 kg 275 kg 385 kg
Dimensions of the flywheel 600x25 mm 650x30 mm 730x30 mm 820x35 mm 970x35 mm 1060x40 mm
Diameter upper roller 110 mm 135 mm 120 mm 160 mm
(option 200 mm)
160 mm
(option 240 mm)
200 mm
(option 280 mm)
Diameter lower roller conic 110 mm (middle) 120 mm 120 mm 120 mm 160 mm 160 mm

Auto Overload regulator

This is an electrical device which monitors the speed of the flywheel and stops the timber from feeding on to the flywheel when the flywheel rotations fall below a preset level. This lets the engine and flywheel build up to speed again before the rollers are re engaged to continue the chipping process

Feed Controls

Jensen offers two options for feed control. Either the Manual hydraulic system to remove electrics completely, or the 100% vibration & waterproof touch pads together with LED lights for extra safety in the dark (exclusively Jensen). This option offers maximum safety and is very user friendly.
Feed Controls


Comb system

For high quality wood chips there is a special double disc available with comb system. This system prevents the production of too big wood chips. After the knives have cut the timber, the bigger chips are crushed between the fingers of the comb system. By using 3 blades (in stead of 2 in the standard flywheel) the quality of the chips is assured for using them in high qualified heating and energy systems.
Comb system
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