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Jet jj-6-csx jointer, So Frustrated

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Forum topic by slolearner posted 04-12-2019 11:28 AM 485 views 1 time favorited 8 replies Add to Favorites Watch
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slolearner

27 posts in 679 days


04-12-2019 11:28 AM

So I went into a local tool shop to peak around at what he had because I have never been there. The employee and I had been talking and she asked me if I was in the market for any particular tools at this time and I stated I was looking for a planer and a joiner, given the fact the store was loaded to gills with high end product I figured I was out of luck. After a few minutes of dialog she tells me she has a used JET joiner and we made our way over to it, at first sight I thought buy it. I needed to clam myself because its kinda what Ive been lookin for, I was very close to buying a table top model but really wanted cast Iron but i just cant justify it because of the amount of work i would do with it is minimal. I asked her how much and she told me 375 firm with the mobil base. I shouted SOLD!!!!!!! So from there I ran the model number JJ-6-CSX and saw the current models going for 1300 give or tke and felt pretty good about my purchase, the tables were in excellent condition the fence was solid and of course the blades were dull. So when i got it home I noticed online many of the used models were selling for about 375 so I still did ok. My frustration is coming from the blade set up but iam sure you all knew that already…..The instruction state that the blade should be 3/16 above the cutter head, but when I do and I set the outfeed table…( yes I already know I never touch the outfeed table once its set but I am working on my initial set up ) the blades hit the outfeed…Then I went and bought the magnetic set up jig set tables in parallel and then it looks and performs like I do not have enough blade sitting above the cutter head. Right now I have a 375.00 cast iron thing sitting in garage and no ambition to mess with it anymore…


8 replies so far

View Fred Hargis's profile

Fred Hargis

5843 posts in 3060 days


#1 posted 04-12-2019 11:46 AM

The manual I looked at said the knives should be 1/16” above the cutterhead. My 8” Jet says “approximately .079”...which is slightly more than 1/16”. I’d reset the knives lower and not fret about it too much. The other thing is that the outfeed table may not be co-planer. If the far end is up too much it might create the problem you have. I’m not sure that you mean when you say “performs like I do not have enough blade sitting above the cutter head”. Maybe you can elaborate a little?

-- Our village hasn't lost it's idiot, he was elected to congress.

View GrantA's profile

GrantA

2001 posts in 1974 days


#2 posted 04-12-2019 11:54 AM

Forget trying to get the knives 3/16 from anything. Does the cutterhead have jack screws on this model? If so run them all the way in, pick a spot to set your out feed table, make the infeed table the same height (probably about where a zero Pointer lines up) and bring the knives up to the out feed table height.

Here's a video

View hairy's profile

hairy

3004 posts in 4099 days


#3 posted 04-12-2019 12:02 PM

I have that same jointer. I set the knives differently. I install them all the way into the cutterhead, then adjust the tables to eliminate snipe. I keep the cutterhead from rotating and hold the knife down with a scrap of wood, then tighten the screws.

They all need to be at the same height. By installing them the way I do, they will be.

Jigs, micrometers, magnets or whatever method used are ways to install them all at the same height. Then you still need to adjust the tables to eliminate snipe.

-- Genghis Khan and his brother Don, couldn't keep on keeping on...

View slolearner's profile

slolearner

27 posts in 679 days


#4 posted 04-12-2019 12:18 PM


The manual I looked at said the knives should be 1/16” above the cutterhead. My 8” Jet says “approximately .079”...which is slightly more than 1/16”. I d reset the knives lower and not fret about it too much. The other thing is that the outfeed table may not be co-planer. If the far end is up too much it might create the problem you have. I m not sure that you mean when you say “performs like I do not have enough blade sitting above the cutter head”. Maybe you can elaborate a little?

- Fred Hargis

Fred is correct I meant to say 1/16th, Fred the blade is barely above the retainer bar,it seems like the bar and the blade are hitting the material. As far as jack screws, I have two small allen screws that the bar sits on and then the retainer bar. I am using a digital height gauge off the table so I know Iam pretty much dead on whatever number I use…

View CaptainKlutz's profile

CaptainKlutz

2062 posts in 2061 days


#5 posted 04-12-2019 12:38 PM

Sorry to read. Machinery can be very frustrating.

Did you start with only aligning the out feed table and cutter head to same plane? Then, Work on in-feed table coplanarity after they are set? You can adjust the table positions to be above the knives and create this problem if you work out of order.

Due geometry of the out feed table and cutter head; there can only be one of two problems:
1) The out feed table is too low.
- Did you check that the gib screws are snug ( and out feed table is not moving up/down)?
If these are too loose, there can be too much up/down movement in table. If too tight, can not adjust out feed table position. It’s a balancing act to get them set right.
- Have you checked that the gib(s) for out feed table are not missing or damaged?
If the gib is missing, or badly worn, it could cause the out feed table to be lower.
- Cast iron is damaged.

2) The cutter head is too low.
Considering the cutter head bearing blocks rest in a pocket in main casting, hard to see how this could happen unless the cutter head bearing caps are damaged? Regardless, since the bearing caps are held into casting from bottom with one bolt each side, you could insert some wide shim stock under each bearing cap and raise the head slightly. If adjusting the out feed table doesn’t work, and only need small lift; might try this. Be warned, to remove the cuter head bolts, have to remove/lift the entire cast iron assembly off the base.

PS – Once tool is out of warranty, Jet technical service/parts department does not really care if you bought machine new or use. They just want your machine working. If the checking/adjusting the gib(s) doesn’t fix the out feed height issue, give them a call. They helped me once over the phone fix a damaged CL purchased jointer.

Best Luck.

-- I'm an engineer not a woodworker, but I can randomly find useful tools and furniture inside a pile of lumber!

View Aj2's profile

Aj2

2574 posts in 2365 days


#6 posted 04-12-2019 01:56 PM

The manual I looked at said the knives should be 1/16” above the cutterhead. My 8” Jet says “approximately .079”...which is slightly more than 1/16”. I d reset the knives lower and not fret about it too much. The other thing is that the outfeed table may not be co-planer. If the far end is up too much it might create the problem you have. I m not sure that you mean when you say “performs like I do not have enough blade sitting above the cutter head”. Maybe you can elaborate a little.

- Fred Hargis

Fred is correct I meant to say 1/16th, Fred the blade is barely above the retainer bar,it seems like the bar and the blade are hitting the material. As far as jack screws, I have two small allen screws that the bar sits on and then the retainer bar. I am using a digital height gauge off the table so I know Iam pretty much dead on whatever number I use…

- slolearner

If you post a pic of the knives and gibs as they sit in the jointer we can at least check that you have the correct parts.

-- Aj

View slolearner's profile

slolearner

27 posts in 679 days


#7 posted 04-12-2019 02:49 PM


Sorry to read. Machinery can be very frustrating.

Did you start with only aligning the out feed table and cutter head to same plane? Then, Work on in-feed table coplanarity after they are set? You can adjust the table positions to be above the knives and create this problem if you work out of order.

Due geometry of the out feed table and cutter head; there can only be one of two problems:
1) The out feed table is too low.
- Did you check that the gib screws are snug ( and out feed table is not moving up/down)?
If these are too loose, there can be too much up/down movement in table. If too tight, can not adjust out feed table position. It s a balancing act to get them set right.
- Have you checked that the gib(s) for out feed table are not missing or damaged?
If the gib is missing, or badly worn, it could cause the out feed table to be lower.
- Cast iron is damaged.

2) The cutter head is too low.
Considering the cutter head bearing blocks rest in a pocket in main casting, hard to see how this could happen unless the cutter head bearing caps are damaged? Regardless, since the bearing caps are held into casting from bottom with one bolt each side, you could insert some wide shim stock under each bearing cap and raise the head slightly. If adjusting the out feed table doesn t work, and only need small lift; might try this. Be warned, to remove the cuter head bolts, have to remove/lift the entire cast iron assembly off the base.

PS – Once tool is out of warranty, Jet technical service/parts department does not really care if you bought machine new or use. They just want your machine working. If the checking/adjusting the gib(s) doesn t fix the out feed height issue, give them a call. They helped me once over the phone fix a damaged CL purchased jointer.

Best Luck.

- CaptainKlutz

SUCCESS…!!! I USED THIS METHOD…I think I was so wrapped up in trying to use what I found and read on internet that I didnt stop to understand the mechanics of it and why snipe happens. Right now I have the cutterhead damn near flush with the apex of the blade and checked all 3. Never will I ever again coplane the in/out feed table then bring the blades in. From now on outfeed and blades then infeed to that, the biggest thing is the cutter head flush with the outfeed though….

View CaptainKlutz's profile

CaptainKlutz

2062 posts in 2061 days


#8 posted 04-12-2019 03:25 PM

Glad you figured it out.
FWIW – the Jet manual is available online and it shows same alignment sequence.
http://content.jettools.com/manuals/man_708457K.PDF

Remember, can believe less than half of what you read on internet. Biggest challenge is always figuring out which half. :-)

Cheers!

-- I'm an engineer not a woodworker, but I can randomly find useful tools and furniture inside a pile of lumber!

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