Leith Harwood
08-10-2017, 7:12 PM
Hi all,
I own a jjp12 it's just over 3 years old. The other day I was planing a small piece of walnut and i didn't realize the board had a taper to it. So what started off as a small pass ended up a bigger one. After a grunt from the machine and a bang I stopped it to find plastic underneath. When I opened the covers I could see the chainwheel plastic tensioner had broken and the shaft bent. A bit of online research shows this is a problem with this unit, so I ordered the whole replacement chainwheel assembly from my jet dealer. Had it all reinstalled in a few minutes and was off again. But annoyingly, the moment a piece of timber touched the indeed roller (light pass) bang, again, and the whole new assembly was in pieces.
I see no other damage or any obvious signs of problems. I have seen issues with the pillowblock that hold the indeed/outfeed rollers causing his, but I have lubricated mine and they spin quite freely.
The knives are original, and whilst probably due for replacement, they were giving a reasonable result.
My only 'issue' prior to this, I had found the rollers weren't grabbing the timber very well in planing mode.
Would blunt knives cause this kind of problem? I'm kinda out of ideas otherwise and don't want to keep replacing the chain wheels
I own a jjp12 it's just over 3 years old. The other day I was planing a small piece of walnut and i didn't realize the board had a taper to it. So what started off as a small pass ended up a bigger one. After a grunt from the machine and a bang I stopped it to find plastic underneath. When I opened the covers I could see the chainwheel plastic tensioner had broken and the shaft bent. A bit of online research shows this is a problem with this unit, so I ordered the whole replacement chainwheel assembly from my jet dealer. Had it all reinstalled in a few minutes and was off again. But annoyingly, the moment a piece of timber touched the indeed roller (light pass) bang, again, and the whole new assembly was in pieces.
I see no other damage or any obvious signs of problems. I have seen issues with the pillowblock that hold the indeed/outfeed rollers causing his, but I have lubricated mine and they spin quite freely.
The knives are original, and whilst probably due for replacement, they were giving a reasonable result.
My only 'issue' prior to this, I had found the rollers weren't grabbing the timber very well in planing mode.
Would blunt knives cause this kind of problem? I'm kinda out of ideas otherwise and don't want to keep replacing the chain wheels