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Delta DJ-20 cutterhead guard adjustment

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Forum topic by JCantin posted 07-14-2016 11:01 AM 248 views 0 times favorited 5 replies Add to Favorites Watch
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JCantin

165 posts in 2875 days


07-14-2016 11:01 AM

I just acquired a used Delta DJ-20 37-350 model jointer off CL. When trying it out I noticed the cutterhead guard had poor spring action and am now trying to correct that.

I checked a few posts including this one and both there and in the Delta manual it refers to a flat part in the “post” against which you should tighten the set screw. [Note: the Delta parts diagram however appears to refer to this part (#78) as a “support.”]

My problem is that the post/support does not seem to be removeable (not sure it is supposed to be?) and I can’t see or find any flat spot. It will rotate with the set screw removed, but only about 1/4 of a revolution. I have soaked it with WD40 and tried twisting it off with pliers and prying it gently with a screwdriver, but no luck. It still roates only about a 1/4 turn. When I tighten the set screw against it and rotate it, I cannot feel any flat spot. I assume it is the locking of the post in place with the set screw that allows the spring to coil/uncoil during use.

Is the post supposed to be removeable? If you have one, what does the “flat spot” look like and how is it oriented in relation to the post on top?


5 replies so far

View teejk02's profile

teejk02

424 posts in 588 days


#1 posted 07-14-2016 01:10 PM

Not so sure about the DJ20. Does your guide post have a slot the engages the spring like its little sister? I simply back off the fence and “wind” the guard to desired tension (not unlike the recoil start on a lawnmower) then move the fence back. I never touched that bushing.

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bigblockyeti

3668 posts in 1184 days


#2 posted 07-14-2016 03:12 PM

I’ve never had to adjust the tension on mine, it was good to go when I bought it. Here’s a couple pictures to show how it goes together.

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pintodeluxe

4854 posts in 2276 days


#3 posted 07-14-2016 05:56 PM

I just loosen the set screw and grasp the black part (shown in your original post) with channel lock pliers. Put a little tension on it and re-tighten the set screw. Then re-check the guard tension, and adjust as needed.

A little dry lube like Bostik GlideCote helps too.

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

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teejk02

424 posts in 588 days


#4 posted 07-14-2016 06:25 PM



I ve never had to adjust the tension on mine, it was good to go when I bought it. Here s a couple pictures to show how it goes together.

- bigblockyeti

Guess the DJ20 is different than the little sister (at least the newer ones…they have a spring assembly clearly visible from the bottom). But as it is, anytime I encounter a set screw securing anything with a machined flat spot I “hunt” for it. Keep the allen wrench on the set screw as you rotate the part with the flat spot. Get it semi-snug and then rotate the part. If you aren’t on the flat spot when you start you’ll find it quickly because the set screw will want to go deeper.

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JCantin

165 posts in 2875 days


#5 posted 07-15-2016 06:50 PM

Thanks everyone. With more WD40 I was able to loosen up that post and from there it was all about orienting the nub on the post closer to 180 degrees from the set screw. Once I did that the spring engaged properly and tensioned up as I swiveled the guard. From there it was just some fine tuning of the tension like pintodeluxe described.

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