Marine Corps Naval cannon project #5: Fitting hardware and mortising out crossmembers.

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Blog entry by Trapper brandenburger posted 07-25-2016 08:21 PM 954 reads 0 times favorited 3 comments Add to Favorites Watch
« Part 4: Trunnion mounts Part 5 of Marine Corps Naval cannon project series Part 6: Another boring adventure. »

It doesn’t seem like it but I put in a long day and got a lot done. I put the main runners together and fit the hardware. Then measured again and did some layout work. I was then able to cut the cross members. Once I had that done I started to cut out the main runners to accept the crossmembers. These will be all threaded as well as glued. Any members have any tips for boring thru main runners and cross members?

The paint turned out really nice.

-- -Trapper

3 comments so far

View Mean_Dean's profile


4948 posts in 2571 days

#1 posted 07-26-2016 12:42 AM

You’re right—that paint really turned out great!

Can’t help you with the boring, but will definitely keeping up with this project!

-- Dean

View tblank's profile


57 posts in 2393 days

#2 posted 07-26-2016 02:42 AM

For boring the holes I am thinking perhaps the same as a hole boring jig for door hanging. You can use a pipe (i.d.) the same diameter as the hole to run the bit through. Mount the pipe PVC or other to the members in line with the hole layout, and run the bit through. In beam building we try to come from each end to meet in the middle. The pipe is your line guide. The pipe can be mounted to a couple of layers of 3/4” plywood like a floor flange in galvanized piping. I’m assuming you are going to use a ship’s auger so my choice would be to use PVC. Hope this makes sense. SEMPER FI Devil Dog!

View Trapper brandenburger's profile

Trapper brandenburger

18 posts in 126 days

#3 posted 07-26-2016 12:06 PM

Semper Fi!! Yeah I’ll be using a 5/8” ship auger and I’d planned on boring from either end. I just wasn’t sure how to keep my line straight. Thank you for the tip! I will make a jig and give that a try!

-- -Trapper

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