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Planing Bowed Boards

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Forum topic by MT_Stringer posted 07-18-2015 02:36 AM 1780 views 1 time favorited 13 replies Add to Favorites Watch
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MT_Stringer

2851 posts in 2693 days


07-18-2015 02:36 AM

Topic tags/keywords: tip jig pine planer milling

I don’t now if this method has been posted before, but this is what I did.

I had three 2×4’s that were bowed on the wide side, not the edges. Instead of throwing them in the trash, I decided to plane ‘em flat.

I have done this before by gluing a piece of wood to each side, just as the board lay on the table. This time, I used pocket screws and attached a piece of plywood to each edge. You might be able to see the bow in the boards vs the plywood. To do this I placed the 2×4 on my workbench so the bow was up and the two end rested on the table.

Then I pre-drilled the plywood runners and screwed them to the 2×4’s.

This method worked perfect. I didn’t have to wait for the glue to dry or build some kind of planing sled.

Don’t worry about the screws hitting the planer blades. There is too much timber in between them.

After running the boards through the planer until the tops were even with the runners, I turned them over and ran them through again.

It appears I now have three boards that are about 1 1/4 inch thick…and flat! No dumpster for these guys.
Mike

Fastening the plywood runners to the 2×4.

Ready…

Done.

-- Handcrafted by Mike Henderson - Channelview, Texas


13 replies so far

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ChrisBarrett

99 posts in 519 days


#1 posted 07-18-2015 12:15 PM

Yeah I have seen this method before, downside is just the screw holes.

View waho6o9's profile

waho6o9

7172 posts in 2039 days


#2 posted 07-18-2015 02:30 PM

Great idea thanks Mike!

View WoodWorkingJunkie's profile

WoodWorkingJunkie

5 posts in 506 days


#3 posted 07-18-2015 05:59 PM

I do this on the reg, works great!

-- Please visit the WoodWorking Junkie on YOUTUBE at https://www.youtube.com/channel/UCGkDwuvbtRZZVbWYZq-cx5Q

View distrbd's profile

distrbd

2227 posts in 1908 days


#4 posted 07-18-2015 10:14 PM

Excellent idea Mike.

-- Ken from Ontario, Canada

View misterbig's profile

misterbig

43 posts in 1139 days


#5 posted 07-18-2015 10:29 PM

Doesn’t the glue in the plywood destroy the planner knives. I am sure I read that you are never to plane plywood, or mdf unless you plan on replacing blades.

I seen a method using a mdf sled and the. Place the boards on it one by one and shim(hot glue even) and once you have boards attached to sled then run the sled through until they are flat.

M

View MT_Stringer's profile

MT_Stringer

2851 posts in 2693 days


#6 posted 07-18-2015 11:08 PM


Doesn t the glue in the plywood destroy the planner knives. I am sure I read that you are never to plane plywood, or mdf unless you plan on replacing blades.
M

- misterbig

Well, if you read it on the internet, it must be true, huh? :-)

My blades are still in one piece and working just fine. Who knows, they may dull sooner than the last set. If they do, I’ll turn ‘em around and go again. It’s not like I took off a lot of material, most of which was the 2×4 sticking up.

I will say this, if I had some soft wood like white pine, I would have used it. But I didn’t have anything long enough to rip up.

-- Handcrafted by Mike Henderson - Channelview, Texas

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misterbig

43 posts in 1139 days


#7 posted 07-19-2015 12:24 AM

Well I was asking a question to people that may know…. not slamming the idea, just want to understand if that is acceptable approach. At a price of $65 for a set of blades don’t want to burn up $32.50 to save $6 worth of boards

M

Doesn t the glue in the plywood destroy the planner knives. I am sure I read that you are never to plane plywood, or mdf unless you plan on replacing blades.
M

- misterbig

Well, if you read it on the internet, it must be true, huh? :-)

My blades are still in one piece and working just fine. Who knows, they may dull sooner than the last set. If they do, I ll turn em around and go again. It s not like I took off a lot of material, most of which was the 2×4 sticking up.

I will say this, if I had some soft wood like white pine, I would have used it. But I didn t have anything long enough to rip up.

- MT_Stringer


View Tim's profile

Tim

3112 posts in 1423 days


#8 posted 07-19-2015 01:53 AM

Since it was a good save on those 2×4s, I really don’t mean to sound negative, but with only 1/8” bow each side, I could flatten them with a hand plane in less time than it would take to rip the plywood strips and screw them on. It’s really pretty quick to hand plane them but I suppose not everyone wants to do that or may have back/neck issues etc.

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exelectrician

2327 posts in 1889 days


#9 posted 07-19-2015 02:26 AM

Yeah!! I remember as a noob straightening bad cuts on plywood on my jointer – Result deep grooves in my new blades where the glue was… lesson learned, the hard way.

-- Love thy neighbour as thyself

View AlaskaGuy's profile

AlaskaGuy

2406 posts in 1771 days


#10 posted 07-19-2015 06:14 AM

Yes that work but why not buy a jointer and save a ton of time and screws holes.

-- Alaskan's for Global warming!

View MT_Stringer's profile

MT_Stringer

2851 posts in 2693 days


#11 posted 07-19-2015 03:58 PM



Yes that work but why not buy a jointer and save a ton of time and screws holes.

- AlaskaGuy

I have a jointer, but this was easier. :-)

-- Handcrafted by Mike Henderson - Channelview, Texas

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AlaskaGuy

2406 posts in 1771 days


#12 posted 07-19-2015 05:26 PM


Yes that work but why not buy a jointer and save a ton of time and screws holes.

- AlaskaGuy

I have a jointer, but this was easier. :-)

- MT_Stringer


Somehow that just doesn’t compute my mind.
Please explain how your process is easier than the tool that was specifically designed to flatten and straighten the face and edges of lumber.

-- Alaskan's for Global warming!

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MT_Stringer

2851 posts in 2693 days


#13 posted 07-19-2015 05:31 PM


Yes that work but why not buy a jointer and save a ton of time and screws holes.

- AlaskaGuy

I have a jointer, but this was easier. :-)

- MT_Stringer

Somehow that just doesn t compute my mind.
Please explain how your process is easier than the tool that was specifically designed to flatten and straighten the face and edges of lumber.

- AlaskaGuy

They were bowed badly. What I did worked just fine for me and they are ready for whatever project may come along. Very easy to do. Just feed ‘em, through the planer, repeat…drink a beer. :-)

-- Handcrafted by Mike Henderson - Channelview, Texas

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