Anyone familiar with Delta DJ20 jointer guard

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Forum topic by PBthecat posted 01-24-2010 04:45 PM 5143 views 1 time favorited 4 replies Add to Favorites Watch
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53 posts in 3072 days

01-24-2010 04:45 PM

I’m having a hard time adjusting it to swing smoothly. I think the return spring might be too short. I know the trick about snugging the spring against the pin abd then rotating the holder a little counterclockwise, but after I snug up the bolt the spring doesn’t rotate when the guard swings.

A little convoluted I know, but someone who has worked on the same problem will get it (I hope)

-- "Every hundred years, all new people"

4 replies so far

View GAVol's profile


11 posts in 3049 days

#1 posted 02-10-2010 03:33 PM

Did you ever come up witha solution to your DJ20 Guard? I’ve have a similar issue. If i pull the guard back all the way across the bed, it gets enough tension to rotate back over the cutterhead. That’s fine with very wide stock. But for if the guard is only pulled back two or three inches, there is not enough tension on the spring to swing the guard back over the cutterhead.

Did you find an answer?


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13606 posts in 3363 days

#2 posted 02-10-2010 04:02 PM

i’ve got the dj20 also ,
seems to me this made me remember a similar issue way back when ,
i’m thinking i solved it buy removing the fence ,
and running the guard over further and tightening it there ,
and then pulling it back to get the fence back on .
make sure it is clean from sawdust so it can work freely .
hope this helps .

-- david - only thru kindness can this world be whole . If we don't succeed we run the risk of failure. Dan Quayle

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11 posts in 3049 days

#3 posted 02-12-2010 04:44 AM

David, Thanks for the suggestion. I’ll try taking off the fence as you suggested and see what happens.

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53 posts in 3072 days

#4 posted 02-19-2010 05:14 PM

I solved the problem doing the following:

1. Download a copy of the G0490 jointer parts list from Grizzly’s website. Virtually the same as the DJ-20
2. Remove the allen bolt (73) that secures the guard.
3. Make sure that both ends of the spring (77) are located is their respective spots, one end locked into the notch in the guard (75), the other end inserted into a hole inside the pivot (74)
4. Make sure the base (79) is located so the flat portion of it is facing the set screw (105). Insert the base into the casting and ensure it touches bottom. Tighten the set screw
5. Insert the guard assembly into the base. The assembly includes the Guard, allen bolt, pivot and spring. Tighten the allen bolt.
6. At this point, the guard will likely not swing properly so here is how the adjustment works. There are 2 steps.

Step 1

1. Loosen the allen bolt
2. Using a pair of vice grips with the jaws protected (hockey tape works), lock onto the pivot and rotate it slightly clockwise
3. While holding the pivot in position, tighten the allen bolt.

This increases the tension on the spring making the guard swing closed. I may be wrong when I say clockwise, it could be counter-clockwise but try both, the increase in tension will tell you if you are doing it correctly.

If this works you’re done, if not grab the pivot with the vice grips, loosed the allen bolt and turn the pivot a little more. Tighten the allen bolt. If you have no luck, proceed to step 2

Step 2

1. The way the guard is designed to swing requires that the pivot (74) be stationary (no rotation) and the guard swing freely. Often the case is that both the pivot and guard both swing resulting in no tension and no swing back into position. The reason for both swinging is that when the allen bolt is tightened it creates friction between the guard and the pivot which we do not want. What we do want is the pivot to be held stationary but the guard to rotate on the pivot. The allen bolt is what holds the pivot stationary.

2. Take the guard assembly apart and place a flat washer into the base (79) and then added the spring, guard, pivot and allen bolt.

3. Repeat the process is step 1 to increase the spring tension and tighten the allen bolt

4. The guard should swing freely.

The washer adds some separation between the pivot and the guard which allowed the guard to swing freely. Experiment with the number of washers but I think the concept is clear enough.

-- "Every hundred years, all new people"

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