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Forum topic by RusticSmoke88 posted 03-15-2019 02:03 PM 370 views 1 time favorited 13 replies Add to Favorites Watch
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RusticSmoke88

2 posts in 5 days


03-15-2019 02:03 PM

Anyone know why my planer started to make scratches on the wood. Planer is brand new and it’s the 2nd time I’ve actually used the planer so i know the blades are sharp. Planer is a Dewalt 734.


13 replies so far

View Think0075's profile

Think0075

4 posts in 22 days


#1 posted 03-15-2019 02:30 PM

If those scratches are actually raised ridges then ur blades are nicked. You can always try flipping ur blades around since they are double sided and see if that solves the problem.

View bigblockyeti's profile

bigblockyeti

5490 posts in 2018 days


#2 posted 03-15-2019 02:38 PM

As stated ^ the blades are nicked. What did you run through it the first time? I have the same planer and provided you keep anything nasty from going through the blades, they usually last quite a while. The first time they hit anything they shouldn’t, you’ll nick them instantly.

-- "Lack of effort will result in failure with amazing predictability" - Me

View BlueRidgeDog's profile

BlueRidgeDog

279 posts in 76 days


#3 posted 03-15-2019 02:57 PM

Scratches or ridges? Likely as other say they are ridges left from small (actually in this case pretty darn big) nicks.

I have some nicks in my blades…I slid them left and right to make them cancel out and what remains is planned off by putting it through a “spring” pass through the planner flipped over.

View bilyo's profile

bilyo

559 posts in 1399 days


#4 posted 03-15-2019 03:05 PM

I have the same planer and have had the same thing happen. When it happens, I can find no obvious reason for it. I have taken the blades out and given them a light honing (just a light swipe or two with a fine diamond stone) and the “ridges” go away for a while. I find no nicks in the edges. Because I don’t find any nicks or other damiage, I have stopped being concerned. The “ridges” respond quickly to 150 or 180 grit sandpaper or a scraper. So, no big deal. However, it would be interesting to find out, for sure, what the cause is.

View Kazooman's profile

Kazooman

1283 posts in 2249 days


#5 posted 03-15-2019 04:12 PM



I have the same planer and have had the same thing happen. When it happens, I can find no obvious reason for it. I have taken the blades out and given them a light honing (just a light swipe or two with a fine diamond stone) and the “ridges” go away for a while. I find no nicks in the edges. Because I don t find any nicks or other damiage, I have stopped being concerned. The “ridges” respond quickly to 150 or 180 grit sandpaper or a scraper. So, no big deal. However, it would be interesting to find out, for sure, what the cause is.

- bilyo

Just a thought on having the ridges go away when you remove and replace the blades. I don’t have this planer, but I think the holes in the blade are a bit elongated. If you slide one over a bit when replacing it any nicks in the blades will no longer line up. That is an old trick for a quick temporary fix for nicked planer and jointer knives.

View AlaskaGuy's profile

AlaskaGuy

5112 posts in 2606 days


#6 posted 03-15-2019 04:33 PM

My opinion

A planer is a dimension tool not a finishing tool. The surface still needs sanding after going through the planer anyway. Your raised ridges will easily sand/scrape out during the finishing stage As long as the blades are sharp and just nicked I don’t worry about it. If I change blades ever time I got a nick I’d go broke. Keep your would clean a small speck of sand can nick you blades.

The job of the planer is not to eliminate sanding.
If that is the second time you have used those blades I’d you have some dirty wood.

-- Alaskan's for Global warming!

View BlasterStumps's profile

BlasterStumps

1228 posts in 736 days


#7 posted 03-15-2019 04:39 PM

My old Shopmaster will get a pitch buildup on the blades which will tend to leave marks. When it does, I just clean the blades with some WD-4

edit: maybe not pitch but a buildup of some sort which will track.

-- "I build for function first, looks second. Most times I never get around to looks." - Mike, western Colorado

View RusticSmoke88's profile

RusticSmoke88

2 posts in 5 days


#8 posted 03-15-2019 05:52 PM

Thank you guys for all the help. I will take it apart and inspect the blades or rotate them. If it solves the problem i will post an update.

View bilyo's profile

bilyo

559 posts in 1399 days


#9 posted 03-16-2019 01:22 AM


Just a thought on having the ridges go away when you remove and replace the blades. I don’t have this planer, but I think the holes in the blade are a bit elongated. If you slide one over a bit when replacing it any nicks in the blades will no longer line up. That is an old trick for a quick temporary fix for nicked planer and jointer knives.

- Kazooman

No nicks. I can run my fingernail along the edge and not feel any roughness or nicks. Can’t recall with certainty, but I don’t think the blades on this maching can slide side to side.

View TEK73's profile

TEK73

13 posts in 4 days


#10 posted 03-16-2019 06:53 AM

You should check that the sliding bord that it slides in/out on does not have something that scratched the boards, and that the top of the planer is not scratching the boards.
I think I recall that I had something on my planer (different brand) that was misaligned so that the front top of the planer scraped the wood.
You should however notice it if you look closely where the piece go in or out of the planer.

View AlaskaGuy's profile

AlaskaGuy

5112 posts in 2606 days


#11 posted 03-16-2019 07:48 PM



You should check that the sliding bord that it slides in/out on does not have something that scratched the boards, and that the top of the planer is not scratching the boards.
I think I recall that I had something on my planer (different brand) that was misaligned so that the front top of the planer scraped the wood.
You should however notice it if you look closely where the piece go in or out of the planer.

- TEK73

Good advice, need to check all possibles. Scratches would leave a depression, nicked knives will leave raise ridges. In this case I believe it’s been identified as raised ridges.

-- Alaskan's for Global warming!

View Craftsman on the lake's profile

Craftsman on the lake

2888 posts in 3735 days


#12 posted 03-16-2019 08:25 PM

Yup.. on my Dewalt if I nick the blades this will happen. Sometimes if they’re new I live with it and sand it off later as the scratches are usually proud, not gouges so I can sand them off. If not I use the other side of the blades or get new ones. Sad when it happens as planer wood is smoooooth.

-- The smell of wood, coffee in the cup, the wife let's me do my thing, the lake is peaceful.

View Jeff's profile

Jeff

504 posts in 3491 days


#13 posted 03-16-2019 08:39 PM

OP hasn’t said if they are ridges. Are they? Do these lines occur on the surface or underneath. Debris and wood chips under the board will create lines like these as the board rubs against them on the platen.

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