Junkkari HJ252
The Junkkari HJ252 is the most popular size in our chipper range. It is a reliable and efficient chipper with steplessly adjustable blades that produce a consistent quality of wood chips. This tractor-mounted chipper chips wood up to 25 cm in diameter.
Powerful chipper
The 45 degree feed angle of Junkkari’s HJ252 minimizes power consumption compared to other chippers in its size class. The wood is transported diagonally to the chipper, which gives the best possible efficiency from the cutting motion of the blades. Under optimal conditions, the HJ252 can chop up to 30m3 per hour.
The HJ252 is equipped with two horizontal feed rollers. The advantage of two feed rollers is particularly beneficial with airy brushwood, which it can feed efficiently towards the blade. In the G model, the rollers are powered by the tractor’s hydraulics and their rotation speed is steplessly adjustable via a valve on the chipper.
Hand feed or crane feed
The G, GT, GTC models are all tractor-driven chippers. The difference is that the G model requires the tractor to provide not only a PTO drive and an electric socket, but also a pair of hydraulic blocks for the feeder. The GT and GTC models are equipped with their own hydraulics and do not require oil from the tractor. This is a good option when the chipper is used with more than one tractor and you do not want the oils to mix.
The G and GT models are hand fed and the GTC model always requires the wood to be fed by the loader.
Infeed chute
Manual infeed chute
The manual infeed chute is spacious and easy to use. The front is fixed and the rear folds up easily for transport. The infeed is easily controlled by power buttons on both sides of the hopper. The standard no-stress rotation guard ensures smooth working. If the tractor RPM drops, the feed stops, the rollers retract the wood away from the blades and automatically resume feeding when the RPM rises back to the working level. A safety bar around the chute ensures operator safety by cutting off the feed if necessary.
The GTC model of the HJ252 has a crane infeed chute into which the wood should always be fed by the loader.
Crane infeed chute
The HJ252 model can be equipped with a crane infeed set. The difference to the manual infeed model is the strong feed chute and the electronic management with Wizard-C+ controller. Using the control unit and pedals, the infeed can be operated from the tractor, while also controlling the discharge chute.
Blade disc
Chop sharp
The chipper’s disc is equipped with four steplessly adjustable blades, allowing you to precisely determine the size of the chips. From the blades, the chips are transferred to the peripheral blower blades of the disc, where they are crushed, and the blades blow the chips through the chute to the desired location. Optional brush blades are available for the disc. Additionally, the chipper can be converted to a two-blade setup with optional cover plates.
No-Stress
Smooth and safe operation
In the HJ252 model, wood is always fed with the assistance of hydraulic feed rollers. This ensures that wood is transported efficiently and evenly into the chipper.
The No-Stress RPM rotation guard improves smooth operation and safety. It automatically stops the feed if the tractor’s RPM drops below a set limit and resumes feeding automatically when the RPM returns to working level. The No-Stress feature saves the tractor’s engine and reduces fuel consumption.
Accessories
Blade options
A brush blade set is available as an accessory for the HJ252 chipper. It ensures high-quality chip production even from smaller wood material.
With optional cover plates, the disc can be converted to a two-blade model, which is ideal when using a lower-powered tractor.
The chipper chute can be made tiltable with an optional tilting hinge.
Technical information
| Feature | HJ172 | HJ252 | HJ262 | HJ320 | HJ500 | HJ550 |
|---|---|---|---|---|---|---|
| Feed opening size, cm | 20×20 | 26×26 | 26×26 | 35×35 | 45×45 | 50×50 |
| Maximum tree diameter, cm | 17 | 25 | 26 | 32 | 45* | 50* |
| Number of knives | 4 | 4 | 4 | 4 | 2 | 4 |
| Chipping capacity (m³/h) | 3-15 | 7-30 | 7-30 | 10-80 | 20-100 | 30-130 |
| Power demand kW (hp) ** | 30-50 (40-70) | 30-66 (40-90) | 40-90 (55-125) | 120-185 (160-250) | 110-185 (150-250) | +135 (+180) |
| Blade disc diameter, cm | 74 | 94 | 98 | 126 | 138 | 170 |
| Blade disc weight, kg | 106 | 172 | 240 | 520 | 650 | 930 |
| Revolutions, r/min | 540-1000 | 540-1000 | 540-1000 | 540-1000 | 540-1000 | 750-1000 |
| Blade setting, mm | 3-20 | 3-20 | 3-20 | 5-18 | 5-20 | 4-20 |
| Weight, kg | 672 (G model) 727 (GT model) | 825 (G model) 853 (GT model) 854 (GTC model) | 870 (G model) 920 (GT model) 930 (GTC model) | 2400-2900 | 3300-4200 | 7000 |
| Length in transportation position, cm | 200 | 210 (G- & GT model) 230 (GTC model) | 200 (G model) 210 (GT model) 230 (GTC model) | 280-320 | 430-483 | 705 |
| Width in transportation position, cm | 209 | 229 | 134 | 230 | 245 | 254 |
| Height in transportation position, cm | 301 | 320 | 290 | 315 | 295 | 390 |
** Knife adjustment, sharpness, knife setting, chip size and tree species have a significant impact on power demand.
Pictures
Videos
Read the brochure online
An introduction to Junkkari’s extensive range of chippers can also be found in our brochure. You can browse the brochure online here.