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Forum topic by Xoda posted 04-10-2017 01:01 PM 1251 views 0 times favorited 10 replies Add to Favorites Watch
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Xoda

6 posts in 947 days


04-10-2017 01:01 PM

At 60 i decided i needed an activity to keep my mind and hands active. I remember a time long ago….

i want to make an item with six sides and if i remember correctly i need a 60 degree angle? my table saw does not cut 60 degrees. My thought is to make a jig that would hold my work piece at 30 degrees to the table and set the saw at 30. How do i determine the width each segment for a given outside diameter? 17” for example hint hint. The formula would be better than just the answer. My last class in algebra was more than 30 yrs ago. Calculating doses in my head i can do, this no so good.
Been reading Lumberjock posts often enough i thought i would like to join the family.

Xoda


10 replies so far

View JayCee123's profile

JayCee123

200 posts in 1300 days


#1 posted 04-10-2017 01:15 PM

The width of each of the segments is equal to 1/2 the outside diameter … or the radius.

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JayCee123

200 posts in 1300 days


#2 posted 04-10-2017 01:28 PM

Might also help if you visualize your regular hexagon as being made up of 6 equilateral triangles. Each equilateral triangle by definition having 3 equal length sides.

View TungOil's profile

TungOil

1343 posts in 1030 days


#3 posted 04-10-2017 01:44 PM

Assuming you are mitering the sides, a hexagon has six sides but 12 cuts- so each cut is 360/12 = 30 deg. No special jig needed.

-- The optimist says "the glass is half full". The pessimist says "the glass is half empty". The engineer says "the glass is twice as big as it needs to be"

View Robert's profile

Robert

3553 posts in 2016 days


#4 posted 04-10-2017 01:56 PM

Make an auxiliary fence high enough to support your board then set your saw to 30° and run vertically this will give you a 60° cut.

If you’re making a segmented ring or flat circular item you divide 180° by the number of segments, not 360.

If you’re making a tapered item like a flower pot, there are formulas to calculate the compound angle.

-- Everything is a prototype thats why its one of a kind!!

View Rich's profile

Rich

5001 posts in 1124 days


#5 posted 04-10-2017 02:45 PM

These are all good responses. I read your post, saw the 30º part but didn’t realize you were talking about making a 60º cut. You are correct that the angles are 360/6 = 60º, but just as a 90º corner requires 45º miter cuts, your 60º angles will require 30º cuts.

I’d recommend spending $30 or so on a digital angle gauge. You can attach it to the side of the blade using its magnetic base after zeroing it on the tabletop, and set your 30º angle.

View jerryminer's profile

jerryminer

960 posts in 1976 days


#6 posted 04-10-2017 07:10 PM

Calculating angles and setting up miters can be confusing because most miter gauges are 90 degrees off from reality.

Your gauge probably reads “0” when you make a 90 degree cut.

Likewise, it will read “30” when you make a 60 degree cut.

Your table saw can make a 60 degree cut by setting the gauge to 30. Try it.

-- Jerry, making sawdust professionally since 1976

View Lazyman's profile

Lazyman

4080 posts in 1922 days


#7 posted 04-10-2017 07:36 PM

Welcome to Lumberjocks!

Here is a handy calculator for figuring out the various dimensions to get a hexagon of the size you want.
https://rechneronline.de/pi/hexagon.php
You enter the dimension you know and it gives you the others.

Note that a small error in cutting the miter, adds up with the more sides you have. Even a little bit of slop in your miter gauge will show up in the final assembly. I recommend using some scraps to make a small version to check and dial-in on the the angle before you cut the actual pieces.

-- Nathan, TX -- Hire the lazy man. He may not do as much work but that's because he will find a better way.

View Xoda's profile

Xoda

6 posts in 947 days


#8 posted 04-28-2017 12:58 AM

Thanks guys. My wife will like the cat tree i am making. I do projects she wants to get me “Wife Faction” so i can get more play time in my shop

View Rrrandy's profile

Rrrandy

212 posts in 1014 days


#9 posted 04-28-2017 04:19 AM



Thanks guys. My wife will like the cat tree i am making. I do projects she wants to get me “Wife Faction” so i can get more play time in my shop

- Xoda


What’s wife faction?

-- Y'all need to locate a sense of humor. Borrow one if you can't find yours...

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Xoda

6 posts in 947 days


#10 posted 04-29-2017 01:14 AM

In the context above the word faction can be substituted with favor. When I do projects or do honey-do’s for her my faction, or favor, increases and i can spend the faction woodworking, computer time, or poker.

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