Junkarri HJ10 Woodchipper

[garyf]

Hi.We have used our new junkarri hj10 chipper today.The chips are coming off too big.They are coming through the machine as 5mm discs,which are fine,but some are the size of your hand.We are running it at 540rpm PTO speed,but what engine speed should we running it at,should it be about 2000rpm,or more(on a 60hp Same Dorado Tractor) What else could be the problem.The chipper is brand new.The chips are for a woodchip boiler,so need to be a lot smaller.

[Steve Bullman]

sounds like you need to slow the machine down if you want smaller chips

[Robert_S]

The junkari always threw out big chips, some had a valve to slow down the rollers you could try that.

[firewoodman]

slow down the in feed and have blades spinning faster and adjust til you get the right size

[Mr Ed]

Its because your running the pto too slow. There is no gearbox on the Junkkari, the Farmi is the same. You need to run the PTO at 1000 rpm, and you'll get lovely chips.

[garyf]

I will increase the tractor revs and slow the roller speed down and try thet.The timber I am putting through is spruce at 20% moisture content.What engine revs should I be trying it at ?

[garyf]

What engine revs should I run it at 1000rpm PTO speed ?

[Mr Ed]

Green power band on your tacho - it will be different for different tractors.

[Mr Ed]

BTW, spruce at 20% is very dry for a disk chipper. You will need to change the knives daily, and possibly set up a sprinkler on the infeed. The dry timber can cause the disk to get very hot, cooking your bearings. You will also tend to get splintering of the timber when your chipping...

[firewoodman]

What engine revs should I run it at 1000rpm PTO speed ?

 

the speed where the chips come out the right size, and not too slow that it stalls