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Coved octagonal spindle?

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Forum topic by Ben posted 06-07-2013 10:22 PM 786 views 0 times favorited 6 replies Add to Favorites Watch
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Ben

203 posts in 1514 days


06-07-2013 10:22 PM

Was just asked to replicate 6 staircase spindles.
The turning is straightforward, except for the middle section which is an octagon with very subtle coved faces.
The octagon is also subtly tapered.

I’m trying to figure out how to pull these off without expensive tooling.

Thinking some kind of jig attached to the lathe, use my indexing head, and a router? But what bit?

Any easy way to cut the octagon on the table saw and cove them by hand?

Any bright ideas??

Thanks all!


6 replies so far

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bondogaposis

2529 posts in 1009 days


#1 posted 06-07-2013 10:33 PM

What kind of wood are you using? The only way I can think of to do that is by hand w/ curved card scraper. I’d make a special scraper just for the job.

-- Bondo Gaposis

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Ben

203 posts in 1514 days


#2 posted 06-07-2013 10:34 PM

I can use any kind of wood. It will be painted.
Maybe Maple in this case?
I like the curved card scraper idea. But how to cut the tapered octagon?

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bondogaposis

2529 posts in 1009 days


#3 posted 06-07-2013 11:58 PM

I would taper the legs square with a taper jig on the table saw then plane the corners w/ a hand plane to get the octagon.

-- Bondo Gaposis

View 404 - Not Found's profile

404 - Not Found

2544 posts in 1627 days


#4 posted 06-08-2013 12:20 AM

This is on the first page of LJ’s most favourited projects

http://lumberjocks.com/projects/20495

should do the trick.

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REO

614 posts in 731 days


#5 posted 06-08-2013 01:39 AM

The whole thing can be done on the lathe. Turn the round sections as you usualy would. for the tapered octagon turn the section round first to remove most of the wood. mount a skill saw on a 90 degree plate. Two peices of plywood with a brace. Set the lathe up witha table for the 90 degree plate to rid on and set the saw up so that ith handle is up. This will push agains the table when you use it instead of trying to rid up over the turning. on the table set up a guide set at the proper angle for your taper drag the saw mounted in the 90 degree block along the stop with your hed indexed. It will cut the cove. saw blade diameter will set the radius of the cove. To do this on my lathe I have an arbor driven by a motor so i can use any sive blade. I have used up to 16 inches. you will need only to finish sand when done. always index in a clockwise direction when looking into the headstock from the tailstock and take very light cuts on the last face because the corners between two flutes can chip fairly easily.

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REO

614 posts in 731 days


#6 posted 06-08-2013 05:18 AM

holy moly the text size was really small sorry about the previous post.lol it is not the drugs!

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