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38°/52° cutter for cornice molding

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Forum topic by 404 - Not Found posted 525 days ago 591 views 0 times favorited 6 replies Add to Favorites Watch
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404 - Not Found

2544 posts in 1567 days


525 days ago

I’m in the planning stages of quite a big job, I need to make a big cornice and have found the cutter I need in MLCS, they’ll ship it to Ireland too, which I’m delighted about, but do I need to use a 38°/52° cutter for the edges or will a 45° bevel do?

I can’t for the life of me understand why you would need the 38°/52° cutter, can someone please explain?

It’s for this application


6 replies so far

View frosty50's profile

frosty50

25 posts in 945 days


#1 posted 525 days ago

You can use a 45 degree but the crown or cornice won’t sit on the piece like traditional crown. It will work have done it in a pinch on a project or 2.

-- frosty

View madts's profile

madts

1233 posts in 937 days


#2 posted 525 days ago

why don’t you cut the 52dwg/ 38deg on the table saw. One setting will do both.

-- Thor and Odin are still the greatest of Gods.

View Loren's profile

Loren

7230 posts in 2246 days


#3 posted 525 days ago

The router bit will cut both the spring angle and the 90
degree angle to it for the bottom 1/2” edge and top
1/2” face of the moulding.

-- http://lawoodworking.com

View 404 - Not Found's profile

404 - Not Found

2544 posts in 1567 days


#4 posted 525 days ago

Why 38° though? Yes I could do this on the jointer or TS, but why are crown moldings made like this and not 45° angle?
Is it to compensate for perspective?
I haven’t been able to find any information on why moldings are made like this, just curious as to why, does it have something to do with cutting compound mitres?

View Loren's profile

Loren

7230 posts in 2246 days


#5 posted 525 days ago

I think it’s a classical (as in greco-roman) thing and
perspective might be part of it to.

Crown is sometimes made with a 45 degree spring
but it’s not that common to find it an I have never
seen a moulding catalog that specified spring angles.

-- http://lawoodworking.com

View 404 - Not Found's profile

404 - Not Found

2544 posts in 1567 days


#6 posted 525 days ago

Thanks Loren, I’ll dig out my George Ellis Modern Practical Joinery and see if he had anything to say about it.

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