Question about Delta Jointer Blades 6 Inch Fits , Jet Jointers

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Need to find out haw to adjust cutter head and blades.

I have inherited an older Jet JJ-6 jointer without the manual. I did locate a manual on line however it is for a newer model that has allen set screws holding blade. On mine it appears that there are nuts. Can you help me find an older manual?

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I called Jet and they e-mailed me a pdf file with the older manual. There is a toll free number on their website.

Posted on Jan 27, 2009


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Feb 06, 2011 | Delta Jointer Blades 6 Inch Fits , Jet...

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I can't get the blades on my Delta 37-190 Jointer to move up and down using the allen head screws. The screws move up and down but the blade does nothing. What is the problem??

You have to loosen the nuts behind the knife blocks before those allen screws will be able to raise or lower the height. They are only meant as a fine adjustment for dialing in the height. (So the tip of the knife at the highest arc of the cutterhead revolution is in line with the height of the outfeed table, as measured, for example, with a steel straightedge or rule.)
You'll need a small open end wrench to loosen the nuts on one knife only, then replace and adjust the heights, then retighten, then move to the next knife, etc. As you retighten, be careful not to tweak the knife out of alignement, and tighten back and forth across the cutterhead, rather than in a straight line from one side to the other, so the torque is spread evenly across the cutterhead...
Here's a link to a parts guide and owner's manual if that would help you out...If you don't find one there check here and maybe there's something close enough to guide you through the process....
Be careful...If those knives aren't properly tightened you'll destroy the beds, and make sure you unplug the power to the machine before working on it.

I hope this information allows you to resolve this issue. If you need further assistance, please post back with a comment to this thread.
If I've managed to answer your question or solve a problem, please take just a moment to rate this post....thanks!

Apr 29, 2010 | Delta Jointer Blades 6 Inch Fits , Jet...

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I need to find blades to fit a delta 6" X5 jointer, model 37-866x

go to and under the service locator on the right hand side type in your information. The blade set number that I came up with is 37-658 and they show that as qty 3 in one package.

Mar 19, 2010 | Delta Jointer Blades 6 Inch Fits , Jet...

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Can not find replacement blades for delta jointer

I can't get a hit on that number, the model must be other. But it shouldn't be too hard.
Try to find a reliable sharpening service in your area; someone who does saw blades and knives for the cabinet shops will have a source for tool steel and carbide and can make you a set of knives for your jointer. Just get tool steel. While it won't hold it's edge quite as long as carbide knives, it will take a sharper edge to begin with, and should last just fine if you don't run sand through it.
If you have the original knives, hang onto them as they most likely can be resharpened to like new condition, and steel today ain't necessarily what it used to be.
The critical factor is the height. It's usually between 5/8" and 3/4" tall. You want them to be able to rest all the way down on the adjustable pistons without sticking up more than 10-15 thousands above the cutterhead. That will give you the most resharpenings from a set. You might want to invest in a magnaset to help with setting the knives in place.
Here's a link to the sharpening service I use:,+NM&fb=1&split=1&gl=us&view=text&latlng=15322695688682105671
Finally, I would almost bet some contemporary delta replacement knives would work. If you find a place that will return your funds if they don't, you might be able to order them online. These guys will carry them if you can't find someone nearer you:

If I've answered your question or solved a problem, please take a moment to rate this posting...thanks!

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You may want to Call 800-727-9787 x5617 and request Part J-31 Cutter Hand Guardmoz-screenshot-1.jpgmoz-screenshot.jpg

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