My planer blew up....

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Forum topic by Ub1chris posted 08-12-2015 03:42 AM 1454 views 0 times favorited 17 replies Add to Favorites Watch
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127 posts in 1581 days

08-12-2015 03:42 AM

OK, it didn’t actually explode, but first came the grinding sound, then the garage was filled with smoke and the lovely aroma of burning rubber. It’s just a little delta 12” about 15 yrs old, but seemed to be fine up until yesterday. For someone mechanically inclined it may be N easy fix, but I’m not that someone. So what am I looking at? The rubber smell makes me think some kind of belt is done??? Is it worth trying to fix, or do I have a good excuse to upgrade?

17 replies so far

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19708 posts in 2875 days

#1 posted 08-12-2015 03:45 AM

Is it worth trying to fix, or do I have a good excuse to upgrade?

- Ub1chris


-- Randy-- I may not be good...but I am slow! If good things come to those who wait.... Why is procrastination a bad thing?

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2175 posts in 3971 days

#2 posted 08-12-2015 03:57 AM

15 years old, upgrade for sure.

-- Tom D

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7046 posts in 2399 days

#3 posted 08-12-2015 04:29 AM

Model #?

Open it up and see what is wrong. Could be a cheap and easy fix or might be toast… won’t know without looking.


-- Brad in FL - In Dog I trust... everything else is questionable

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Shawn Herrington

28 posts in 1563 days

#4 posted 08-12-2015 06:37 AM

I acquired a free, non-working Delta 22-560 planer as a parts machine last year after the machine died in much the same way as you describe above.

It is not uncommon for the screw that secures the poly-v belt pulley to the (if you are standing on the infeed side, facing the outfeed side) right side of the cutterhead to loosen over time as a result of vibration. Once the set screw backs off far enough, the pulley can move around on the shaft eventually wearing the bore on the pulley out of round and causing a grinding noise. Finally, the pulley can move around so much that it interferes with and melts the belt guard and shreds the belt.

To diagnose, you need to remove outer plastic cover from the right side of the machine (on the 22-560 this is the side with the cutter head lock handle which will need to be removed if you have one). You will then need to remove the plastic belt guard to gain access to the poly-v belt, drive pulley, and cutterhead pulley. At this stage the cause of the failure should be obvious and you should have access to take some pictures and we can give further advice.

See parts 103, 104, and 106 in this diagram.

-- -Shawn

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2793 posts in 2497 days

#5 posted 08-12-2015 11:00 AM

“Is it worth trying to fix….”

You should buy a new one and give the broken one to someone who knows the answer to that question. If you were happy with it before just start tearing into it.

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127 posts in 1581 days

#6 posted 08-12-2015 01:56 PM

It’s a TP400, so may be a little different than yours Shawn. I think I’ll open it up and poke around a bit. Worse case scenario – I have to upgrade, and as several mentioned, that’s not such a bad thing. I’ll post pics if I think it’s fixable but need help.


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127 posts in 1581 days

#7 posted 08-12-2015 07:09 PM


You were right. It was easy to see when I opened up the right side, the belt had come started coming off and melted right through the guard.

When I removed what remained of the guard, the nut holding the pulley was not just loose, it was almost off.

I figured there’s more going on, but tried the easy fix. Got the belt back on, and tightened that nut as tight as my pipe-cleaner arms would go, but it came right off after about half a second and I got another noseful of burning rubber / plastic. Am I truly SOL now?


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7046 posts in 2399 days

#8 posted 08-12-2015 07:13 PM

-- Brad in FL - In Dog I trust... everything else is questionable

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1458 posts in 3186 days

#9 posted 08-12-2015 07:13 PM

Get some blue LocTite on there, let it sit overnight, and try again. Also, you may have to use a similar phrase to the one my dad would use when something was stuck or not tight enough: “I’m gonna need a bigger pipe wrench…”

-- Brian T. - Exact science is not an exact science

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442 posts in 2170 days

#10 posted 08-12-2015 07:36 PM

Another thing to look for if parts are still available for your unit. If so probably worth repairing.

View pintodeluxe's profile


5798 posts in 3014 days

#11 posted 08-12-2015 07:44 PM

To clarify, after you tightened the pulley nut… did the nut come loose again, or the belt came off the pulley again? If the latter happened, it may just need a new belt.
Here’s for hoping.

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

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610 posts in 2958 days

#12 posted 08-12-2015 09:27 PM

Thanks for the post. I’ve not had any problems with my unit, but I think I shall pull the covers and take a peak inside. Probably better to do so now rather than in the middle of a run.

-- Greg, No. Cal. - "Gaudete in Domino Semper"

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127 posts in 1581 days

#13 posted 08-13-2015 01:01 AM

Yes willie, the nut came right off after I tightened it. Now I know I’m not mr muscles, but it felt a little ridiculous. I tightened it and off it comes in about a second. Like I said I’m not sure if there’s something else going on besides needing a longer pipe wrench. I’ll try that tomorrow though…..

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259 posts in 1271 days

#14 posted 08-13-2015 01:10 AM

You also might want to take a look around down inside and make sure there wasn’t a jam-nut floating around…..could explain why the nut flew off so easily.

Another thing: on the back-side of the nut, was there a lock-washer? You need to check to see if it is flattened and has lost it’s spring. Another reason the nut would fly off so fast.

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39 posts in 2284 days

#15 posted 08-13-2015 01:22 AM

I enjoy using the Dewalt DW735, i have actual had no problems with it. I hope you get something to work out for you! I absolutely hate when equipment breaks on me so I always go for the best i can afford, but 15 years is a long time to have and use a tool.

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