How would you cut this arc?

[kmealy]

SWMBO would like one of these for Xmas.   Wondering the best way to do it, without having to spend half a day making a jig.   My initial thoughts are to cut a half-hexagon profile, then even out with a plane and finish up with a belt sander.   Other ideas?

 

[steven newman]

IF you have a lathe.....

Make two square pieces,  glue together with a sheet of paper between them.    Turn  into a cylinder.    Sand smooth.    Remove from lathe, and split them apart along the papered glue line. 

 

Option 2;   Spokeshave it  round.  

[Stick486]

rough hex cut, final shape w/ a convex spoke shave or profile plane and then smooth to happiness w/ your ROS....

too easy to make flats on it w/ a belt sander..

straight edged/bladed cutters will tend to to leave lots of ridges...

[Steve Krumanaker]

It looks like a half round. I would do it like Steven suggested, except I would probably use turners tape. A well known technique.

 

Steve

Edited November 18, 2017 by Steve Krumanaker

[kmealy]

yeah, well I have a lathe on the Shopsmith.   I maybe used it twice.  Hated it both times.  Option #2 sounds good.

[lew]

Well, if you could find a tree, just the right diameter and had a chainsaw...   

 

Just kidding. For me Steve's comment would be my preferred method.

[Gerald]

Bandsaw is the alternative

[HandyDan]

What does it do?

 

If you roughed shaped it on the band saw and refined it some with a plane and or spoke shave you could sand it with a long piece of emery like you were buffing a shoe when polishing it.

[Dadio]

Not being a turner, I would do like you suggested and cut the hex on the table saw then use a block plane or rasp  to round it and then a sanding belt by hand to smooth the marks out. Might make a template out of ply wood for a gauge.

Herb

[Fred W. Hargis Jr]

The lathe is going to give you the most consistent profile (I think). Maybe sub it out, after trying some of the other approaches (if they don't work).

[kmealy]

9 hours ago, HandyDan said:

What does it do?

 

 

My wife does quilting.   She says it's to put a seam over it, fold the allowances over and press it down with an iron.   It gets the seam flatter.  Happy wife, happy life.

[PeteM]

You can buy rod at 1.5" dia, then screw/glue it onto a 1/4" flat board, maybe 2" wide (maybe flat one side of the rod first, 1/2" wide flat).  You end up with a sharper curve top (the sample looks maybe 2" diameter?), but it will expose the seam when the quilt is laid over it.

[Stick486]

short section of large diameter hand rail...

[Stick486]

large diameter rolling pins...

come nominal 2'' dia and up to 3.5'' diameters..

need longer.. dowel them together...

pric3es are as low as 8.95$...

resaw or add a base plate...

http://www.kitchenconservatory.com/Rolling-Pins-C378.aspx

https://www.bakedeco.com/dept.asp?ID=193&Sortby=&attr4=201

https://www.webstaurantstore.com/2483/rolling-pins-and-pastry-accessories.html?filter=material:wood&utm_source=yahoo&utm_medium=cpc&utm_campaign=TEST_Smallwares_|_Core&utm_term=Wooden_Rolling_Pins

[Stick486]

large dia dowel...

https://wood-dowel.com/hardwood-dowels/large-diameter-dowels/

 

[Cliff]

lathe.

 

[Stick486]

6 minutes ago, Cliff said:

lathe.

 

 

no gots...

[Cliff]

2 minutes ago, Stick486 said:

no gots...

then what the other guys are saying about creeping up on it with shaves scrapers & planes

[kmealy]

Yep, pretty much got it done in 20 minutes or so.   Marked out octagon, cut corners on tablesaw, shaved down with a block plane and sanded out facets with ROS.

[Gene Howe]

Easy peasy. Way to go.