How to cut a massive 40mm Ovolo moulding ???

[K Dee]

I have a design in mind that requires a moulding with a 40mm radius ovolo curve. Looking at the trend website, they only do 1/2" Ovolo cutters up to 20mm radius. Understandable really. But does anyone have any ideas how I could get my desired moulding cut?

 

[Chrispy]

with a spindle moulder, or of course you could use a hand plane.

 

[K Dee]

Yeah , I thought so. I shall need to find a company that can do it for me then. Any suggestions?

I need to get about 6 meters with a totally uniform curve. I don't fancy that my hand planing skills are up for the task!

 

[Phil Pascoe]

Has it got to be wooden? Could you build it up from something else?

 

[Mike.S]

As chrispy says e.g. 'hollow' wooden planes, or a spokeshave (there's one with a 26mm radius - could alter the blade for your purpose). Alternatively, if you have a table saw with a tilt function you can take multiple cuts of the edge, moving the saw angle each time, to create a multi-faceted curve and then smooth it off by hand.

 

[doctor Bob]

trend do a 38mm radius on a 1/2 inch, not recommended for hand held.
I do it occasionally and if it bites it takes you for a ride

 

[AndyT]

Hand planing would do it. Show us the design and you'll get some more detailed tips but the basic method is to use a rebate plane (or electric router) to cut down square to define the shape, remove most of the curve with an ordinary jack plane, then tidy up the curve with hollows.
Afterwards, use a shaped block which is the reverse of your intended profile to sand out to the final shape.
Bigger mouldings are probably easier than small ones.
Choose a mild hardwood if you have the choice.

 

[Jacob]

Yes and cut to length first it's easier to work - presumably you don't want a single 6M length.
The process is simple - you pencil round a template at each end of the blank and then set about joining up the lines.
If you haven't got hollows you can finish by going progressively finer with any flat plane and finish off with sandpaper.

Personally I'd do it on a spindle with a home made cutter. Unless it's just a few bits then doing it by hand is a nice way of passing the time.

 

[Mar_mite]

What about forming a square rebate say 50mm x 50mm then fixing 40mm quadrant in, leaving a 5 mm quirk top and bottom.

 

[Phill05]

I have a design in mind that requires a moulding with a 40mm radius ovolo curve. Looking at the trend website, they only do 1/2" Ovolo cutters up to 20mm radius. Understandable really. But does anyone have any ideas how I could get my desired moulding cut?

Hi,

I have a spare Ovolo cutter on 3/8" shank max o/d 52mm with 20mm round over cut I used to use these in a hand held Elu, soft start on power up, wind up to speed and climb cut (pull it back towards you hold on tight as it can grab) in small passes until you can do a couple of finish passes.

Let me know if it will help you.

Phill