LumberJocks

How to turn an oval

  • Advertise with us

« back to Woodturning forum

Forum topic by grafiks posted 06-04-2014 07:59 PM 782 views 2 times favorited 14 replies Add to Favorites Watch
View grafiks's profile

grafiks

4 posts in 106 days


06-04-2014 07:59 PM

Hello,
I am new to the forum and have a project that I need some advice on. I am making some wooden tools to use making jewelry. Will be working with copper and silver mostly. This is a mandrel used to make bracelets that I want to duplicate out of wood

. I would appreciate any ideas on how to make this. It is 8 1/2” long, largest part of oval 2 1/4” x 2 1/2” and the smallest part is 1 5/8” x 1 7/8”. I want to use hard wood, persimmon or beech.
Thanks,
Bob
Banner Elk, NC


14 replies so far

View mrjinx007's profile

mrjinx007

1446 posts in 422 days


#1 posted 06-04-2014 08:13 PM

Welcome to LJ’s. I doubt it can be done like that. You could make each individual ovals separately out of solid wood by turning the and then trimming the corners with a router.

-- earthartandfoods.com

View mtenterprises's profile

mtenterprises

827 posts in 1347 days


#2 posted 06-04-2014 09:21 PM

I know there is a way to lathe turn it but i cannot remember where I have seen it. The only thing that comes to mind is Rose Engine Lathe but they are few and far between. I’m sure someone else on here will have the answer.
MIKE

-- See pictures on Flickr - http://www.flickr.com/photos/44216106@N07/ And visit my Facebook page - facebook.com/MTEnterprises

View SASmith               's profile

SASmith

1590 posts in 1641 days


#3 posted 06-04-2014 09:36 PM

I think what you need is an oval/elliptical chuck.

More info on oval turning here.

-- Scott Smith, Southern Illinois

View FellingStudio's profile

FellingStudio

41 posts in 337 days


#4 posted 06-04-2014 11:03 PM

This is not really that hard guys … it can be done with a simple spur drive.

Starting with a square blank, first mark the center of both ends by drawing straight lines corner to corner. Next mark points on one of your diagonals that are an equal distance from the center point. Mount on the lathe on the center points and turn the blank round. Mount on the lathe using one set of your off center points, and cut away half of the remaining wood. Mount on the lathe using the other set of your off center points, and cut away the remaining wood. You now have an oval.

Basically you are turning the wood three times on parallel axes.

-- Jesse Felling - http://www.fellingstudio.com

View grafiks's profile

grafiks

4 posts in 106 days


#5 posted 06-04-2014 11:47 PM

Thanks for all of the replies. Looks like a special chuck may be in my future.
Bob

View Wolfdaddy's profile

Wolfdaddy

259 posts in 488 days


#6 posted 06-05-2014 12:00 AM

There’s some great info about multi axis turning here: http://www.barbaradill.com/paper.html>

-- Your failures do not take away your possibilities.

View REO's profile

REO

614 posts in 728 days


#7 posted 06-05-2014 12:15 AM

for one off jesse nailed it. unless you have an oval turning chuck (very expensive) or want to build one. the OT lathe will do it to but then that is an additional piece of equipment to buy for a one off.

View Mip's profile

Mip

318 posts in 732 days


#8 posted 06-05-2014 12:59 AM

Vicmarc makes an oval chuck to fit on a lathe, but the downside is the cost: $2600! I think that would be an awful lot to pay to make one little oval mandrel. I would go with FellingStudio’s idea.

View bondogaposis's profile

bondogaposis

2528 posts in 1005 days


#9 posted 06-05-2014 01:53 AM

FellingStudio nailed it, it can be done easily using a technique called offset turning, no fancy equipment required. Here’s a link to how Roy does it.

-- Bondo Gaposis

View Rick M.'s profile

Rick M.

3961 posts in 1034 days


#10 posted 06-05-2014 03:58 AM

If I remember correctly, Roy also covers the math to get the oval you want rather than just guessing.

-- |Statistics show that 100% of people bitten by a snake were close to it.|

View TheFridge's profile

TheFridge

828 posts in 140 days


#11 posted 06-05-2014 04:39 AM

Damn. That is a good idea.

-- "We build our workshops. Then we enjoy the fruits of our labor by laboring for more fruits." - Me

View ScrubPlane's profile

ScrubPlane

187 posts in 850 days


#12 posted 06-15-2014 03:24 AM

I did one of these for my Mother a couple of years ago. Mine didn’t come out as good as the one in the video but the technique is fairly simple and doesn’t require any special tools or complicated geometry.

https://www.youtube.com/watch?v=cDq5oHVD294

View grafiks's profile

grafiks

4 posts in 106 days


#13 posted 06-17-2014 01:56 AM

ScrubPlane
Thanks for the suggestions and youtube. My friend glued up some stock and turned an oval today. It worked great. He was going to try to build a jig and use a router but this is much easier. We want to sell these to people that make jewelry to use as a bracelet mandrel.
Thanks again for your post.
Bob

View Richard Hillius's profile

Richard Hillius

129 posts in 335 days


#14 posted 06-17-2014 02:05 AM

The Woodwright Shop has a episode on turning oval mortise chisel handles that explains the layout really well. Check out PBS’s website, it should be there to watch.

Have your say...

You must be signed in to reply.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics

HomeRefurbers.com

Latest Projects | Latest Blog Entries | Latest Forum Topics

GardenTenders.com :: gardening showcase