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Delta DJ-20 Parallelogram Jointer Issue

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Forum topic by wonderand posted 03-19-2019 04:09 AM 233 views 0 times favorited 4 replies Add to Favorites Watch
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wonderand

12 posts in 1686 days


03-19-2019 04:09 AM

Topic tags/keywords: jointer delta coplanar parallelogram dj-20 dj20

Hi all,

I’ve scored a deal on a Delta DJ-20 8” parallelogram jointer that is absolutely beautiful. Everything is in perfect condition, although the bushings are a bit chewed up on their faces, and the seller told me he thought they needed to be replaced because he couldn’t adjust them. it looks like he wacked them with a chisel. I think he may have just not realized that there were double set screws holding them in place, but he gave me too good of a price for me to ask any questions.

My only issue is that after i backed out the set screws and adjusted the tables to be parallel within a thou or so, I lowered the infeed table only to find that it is now sagging in the back by a good 7-10 thou. I double checked that the set screws were snug, and the bushings never moved while I moved the table. I can’t for the life of me figure out what is happening, anyone else have this issue? The bushings are long since discontinued so no change of me getting new ones. I’ll try again tomorrow and see if it repeats, but I gave up after a few hours of messing with it today.

Just wondering if anyone else has seen this before. Thanks as always for your time.


4 replies so far

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pintodeluxe

5898 posts in 3144 days


#1 posted 03-19-2019 04:32 AM

Keep after it, you’ll get it dialed in. That is a great machine, and soo solid.
What kind of straightedge are you using? Most 4’ levels are not straight enough to tune a jointer. If you get a high reading gap, like .007-.010 try flipping the level over to see if it reads the same. If not, your straightedge isn’t dead flat. This can be a real issue with this jointer, just because of the sheer length of it.

My goal is to be within .002 in an ideal world.

-- Willie, Washington "If You Choose Not To Decide, You Still Have Made a Choice" - Rush

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wonderand

12 posts in 1686 days


#2 posted 03-19-2019 04:48 AM


Keep after it, you ll get it dialed in. That is a great machine, and soo solid.
What kind of straightedge are you using? Most 4 levels are not straight enough to tune a jointer. If you get a high reading gap, like .007-.010 try flipping the level over to see if it reads the same. If not, your straightedge isn t dead flat. This can be a real issue with this jointer, just because of the sheer length of it.

My goal is to be within .002 in an ideal world.

- pintodeluxe

Thanks, yeah I’m using one of the woodriver straightedges, and did try flipping it just to be safe. I’ll give it a go again tomorrow. Worst case scenario, I’ll just try to get it dialed in just below the cutterhead and never move it again. :-)

View ibewjon's profile

ibewjon

276 posts in 3124 days


#3 posted 03-19-2019 12:09 PM

Grizzly has a lot of parts that are interchangeable with Delta. Worth a look.

View wonderand's profile

wonderand

12 posts in 1686 days


#4 posted 03-20-2019 01:04 AM



Grizzly has a lot of parts that are interchangeable with Delta. Worth a look.

- ibewjon

Verrry interesting. Looks like they do have bearings available for their DJ-20 clone, and they’re pretty cheap. Thanks for the idea!

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