LumberJocks

How do I make an octagon out of crown molding

  • Advertise with us
Blog entry by MTay posted 1146 days ago 2187 reads 0 times favorited 9 comments Add to Favorites Watch

Hi,

I think this question was asked on another post but the post was pretty old, so though i would open a new entry.

I am trying to make an octagon out of crown molding in order to make a clock similiar to the picture.

I am new to woodworking, and this is my first attempt with making something like this.

I tried making a sample out of scrap using a 22.5 miter and and 22.5 bevel, with the stock laying flat on the compound miter saw, but I ended up with a six sides, not eight once i had it assembled.

Can anyone step me through this.

What am I doing wrong? The crown molding I am using is 6” wide.

Thanks



9 comments so far

View j_olsen's profile

j_olsen

155 posts in 1796 days


#1 posted 1146 days ago

are you wanting this to be flat or project out
if you are looking for it to be flat you don’t need both angles – flat leave the blade 90 degrees to the horizontal and cut the mitre at 22.5

-- Jeff - Bell Buckle, TN

View MTay's profile

MTay

5 posts in 1146 days


#2 posted 1146 days ago

projected out like in the picture of the clock. So if the clock face was sitting on a table, the inside opening would be raised. Does the molding upper edge need to sit up against the wall, or sit flat on the saw?

View GregD's profile

GregD

612 posts in 1761 days


#3 posted 1146 days ago

If you want it to be beveled, here is the formula you need.

Someone also posted a link to a program to do the calculation for you, but I don’t have that handy at the moment.

-- Greg D.

View GregD's profile

GregD

612 posts in 1761 days


#4 posted 1146 days ago

Have a look at this project. The sides of those trays are beveled and require compound cuts. Comment #8 has a link to a program that does the calculation.

If the final assembly is flat – the backs of all the sides are in the same plane – then do what j_olsen said.

-- Greg D.

View MTay's profile

MTay

5 posts in 1146 days


#5 posted 1146 days ago

OK may be a dumb question, but do I position the crown molding so the upper edge is up against the wall of the saw, then cut?

View j_olsen's profile

j_olsen

155 posts in 1796 days


#6 posted 1146 days ago

that will depend on how much projection you want
if you want the full projection of the crown follow what brantly said

-- Jeff - Bell Buckle, TN

View saddletramp's profile

saddletramp

994 posts in 1263 days


#7 posted 1146 days ago

oops

-- ♫♪♪♫♫ Saddletramp, saddletramp, I'm as free as the breeze and I ride where I please, saddletramp ♪♪♪♫♪ ...... Bob W....NW Michigan (Traverse City area)

View MTay's profile

MTay

5 posts in 1146 days


#8 posted 1146 days ago

I will give these suggestions a try.

Thanks for all your help.

I will post on whatever the outcome is:)

Thanks again.

View Dennisgrosen's profile

Dennisgrosen

10850 posts in 1740 days


#9 posted 1146 days ago

if its just a flat octagon frame
the cutting angle is 45 degree

Dennis

Have your say...

You must be signed in to post the comments.

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