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Rosette Installation Cutter

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Project by HankLP posted 06-24-2019 06:01 AM 416 views 1 time favorited 4 comments Add to Favorites Watch

Store bought jigs for cutting sound holes and routing rosette channels can cost from $100 to $200. There are circle cutting jigs for a lot less, but they lack a means for precise adjustment. The jig here was made after studying several commercial designs. Metal bushings were used to minimize play in the 1/4” metal pivot pin. The radius is adjusted using wing nuts to push or pull the carriage on the threaded rod, and lock it in place. The 10-32 threaded rod allows for fine adjustment – one full turn of the wing nut moves the carriage 1/32” or one half turn 1/64”. The pictures show the very first use of the jig to route a rosette channel in a 1/8” plywood scrap. My original thought was that this would be a “prototype”. However, it worked so well I don’t see a need for further refinement.





4 comments so far

View Ivan's profile

Ivan

14669 posts in 3289 days


#1 posted 06-24-2019 07:50 AM

Interesting…man how I love those various jigs!!

-- Ivan, Croatia, Wooddicted

View LittleBlackDuck's profile

LittleBlackDuck

2854 posts in 1243 days


#2 posted 06-24-2019 09:19 AM

Nice jig H’.P. Have always had my eye on those StewMac gizmos for my noble Dremel(s).

When I first discovered them I had to mortgage my, the parents, grandparents and kids house just for the shipping to Australia… fortunately houses are cheaper now.

I abandoned my fetish to make copies of a Gibson J-160E when the Beatles tossed me out of the band… my band!

-- If your first cut is too short... Take the second cut from the longer end... LBD

View therealSteveN's profile

therealSteveN

3116 posts in 996 days


#3 posted 06-24-2019 05:08 PM

How do I follow up after the late Beatle, Mr Duck’s entry. :-) It had me LMAO

Just wanted to say congrats on a prototype turned final edition. Especially when you can use it to do what it was intended for, and it works as well as it appears to have worked.

Nice job, thanks for sharing.

-- Think safe, be safe

View HankLP's profile

HankLP

101 posts in 924 days


#4 posted 07-01-2019 06:00 AM

Thanks for the comments. I made my first Purple Heart rosette, and installed it in a top for a ukulele. Turned out very well. Still working my way up to building a guitar – much to learn about the feel of the wood.

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