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Will Phenolic be perfectly flat?

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Forum topic by ChrisCarr posted 1331 days ago 773 views 0 times favorited 7 replies Add to Favorites Watch
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ChrisCarr

196 posts in 1500 days


1331 days ago

I need A perfectly flat sheet for a project and I haven’t had much luck with the batlic birch recently as my sheets are close but slightly twisted. Will Phenolic sheets work? Will phenolic stay flat? I would use steel but its too expensive for the thickness I need.


7 replies so far

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Howie

2656 posts in 1524 days


#1 posted 1331 days ago

Have you thought of MDF?
A lot of people use phenolic for jigs and it will stay flat.
What kind of envoirenment will this project be subjected to? That has a lot of bearing on the type of material.

-- Life is good.

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ChrisCarr

196 posts in 1500 days


#2 posted 1331 days ago

I can never find MDF sheets that are perfectly flat. The project will be inside my house which is heated/cooled throughout the year. (unless its nice outside)

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Chip

1904 posts in 2694 days


#3 posted 1331 days ago

Giving us some idea of what you’re using it for might be helpful Chris. But the Phenolic I’ve bought (mainly for jigs) has always stayed flat and true.

-- Better to say nothing and be thought the fool... then to speak and erase all doubt!

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ChrisCarr

196 posts in 1500 days


#4 posted 1331 days ago

Its actually going to be the table for a Homemade Bandsaw.

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Chip

1904 posts in 2694 days


#5 posted 1331 days ago

Well, unless it’s super humid in your shop, Phenolic is always a very safe choice for that sort of thing IMHO.

-- Better to say nothing and be thought the fool... then to speak and erase all doubt!

View Gofor's profile

Gofor

470 posts in 2388 days


#6 posted 1330 days ago

I would think 3/4 BB would work if edge banded with rabbeted (rebated) hard stable wood (i.e quarter-sawn white oak) about 1 1/2” wide, or even edge banded with strips of the ply rabbeted in about 3/8”. Depending on table size, and allowable thickness for your design, laminating two 3/4” sheets together should render a stable surface that could be routed out for mounting attachments, blade guide/cool block clearance etc as needed.

Phenolic is stable and dense (heavy) but is not necessarily more ridgid. It is also expensive. It bends in thinner sheets so you would have to ensure you get it thick enough not to flex at the length you want. It will also probably need support on the edges.

Go

-- Go http://ncwoodworker.net/pp/showgallery.php?cat=500&ppuser=730

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Howie

2656 posts in 1524 days


#7 posted 1330 days ago

Gofor’s idea sounds good.
I don’t think mdf would be a good choice for this anyway.

-- Life is good.

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