Guitar Construction: Make your own radius dish of any size easily!
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- Опубліковано 1 кві 2020
- This video shows how to inexpensively create radius dishes of any size using basic woodworking tools. These dishes are used in the construction of the top and back arch of acoustic and semi-acoustic guitars. I found the commercial ones to be overpriced and limited in size. You can use 60 or 80 grit self adhesive sandpaper or simply glue ordinary sandpaper to them to place them into service. My first one is three years old and only now needs a change of sandpaper! I used a 1/4" bolt as the center spindle - Make sure you place a washer under the dish to allow it to spin freely. Cut the dish radius in several passes, and be careful near the outside as teh router will want to take over and spin the dish quite aggressively as it turns. Finish the disk by coating back and sides with shellac or whatever you have to hand to prevent warping over time.
People like you are the reason I love UA-cam. Thank you.
Brilliant solution for marking a long arc.
Not mine - Mr Archimedes I believe...
This is Soooooooo Cool! The "LONG COMPASS" blows me away, pure 'Da Vinci'!!!!! Thanx mate, Cheers1 Gb g
That’s what I call short and sweet! Eggzellent mate!
Thanks for this mate. You have solved all my needs for making the radius dish. The calculations worked for me too! And the compass I saw at Engels coach shop but forgot about it. Brilliant.. Thanks from the UK.
Great no nonsense explanation. Thanks for going to the effort of putting it up.
This is extremely helpful. Thank you so much for this tutorial!
Thanks a lot for the idea on the jig. I'll be building something similar pretty soon !
It works well and is inexpensive. Good luck with your building
Thank you a lot! Very usefull and a rare explation here YT!
Greetings from SoCal. 🖐. Brilliant! I may just build a guitar after all 😁🥳👍.
This is great. Thanks
Oh. So that's how.
Yes, easy to make any radius.
Bit late to the party but this is a great explanation. I'll definitely be making a few dishes myself soon. Thanks
Glad it’s useful. If you buy a piece of large belt sander paper and slit it you can glue it to the dish. I also use with a go bar deck for gluing.
@@Jeff034 yes I plan to make a go bar deck also. Thanks again
Thanks for the excellent video. Very helpful! How is the dish being constrained to rotate about its axis? Thanks!
these can be priced like saffron and if you gonna make guitars surely you can make these thanks
Thank you for making this video.Can I use plywood instead of MDF?
What are the measurements for 25 foot and a 15 foot? Are the boards typically 2x2? Did you get the chip board to make it round before starting?
Why go through the trouble of making curved rails when you can use the long compass for that as well? A v shaped router sled would be much easier,, and if you add hinges and a way to change the angle of the V you can effectively create different radii...
Nice idea, as I need to build a25' dish, I'll try this out! Thanks!
If I want to create a 25' raduis, do I enter the width and radius in the calculator in 'mm' or " (inches) please? And I take it that the calculated height is of a straight plane above the center (lowest point) of the arc? Thanks.
Enter the value in inches, ft or mm as long as the units are the same. So a 30’ ft radius is for example 9000mm, and the (standard) dish width is 6000mm, which using the calculator provides for a height of 5mm (5.001389661030771mm to be precise, but 5mm will do!)
Once you’ve made the sled and router rail base you can churn out dishes as mean as you like. I have a number of them in each size, one for sanding the radius and one cut into the shape of a guitar that has the braces down on it so I know which area to sand to achieve a perfect brace fit and can also be used in my go bar deck for gluing said braces.
Cheers
Thanks.
Guess it's not really a fixed radius plate, but a compound radius plate or a curved plate.
Its a fixed radius plate based on the formula. Cheers
What is a radius dish used for?
Forming the front and back of a classical Guitar.
Thank god you guy's are around, but either i'm stupid or just dense. In the example below the gent asked you what dimensions are entered in the calculator (web site one) and you said as long as all are the same....... ok......... now further he needs a 30' radius dish and you said enter 9000mm and 6000 mm is a standard dish??? I'm confused what standard dish??? ...... So please help me I need a 40' radius dish for continued sanding....... your video does not show the cutter on your router?? Also I sure wish I'd have found you BEFORE I spent 150 for 2 dishes, a 28 and a 15...... ouch. Thanks so much for your help.
I use a 15' (foot) dish and a 30' dish for my instruments. 15' on the top and 30' on the back - I understand these are pretty common radii for steel instruments, certainly used by Martin guitars so I called it 'standard'but You are correct it isn't really 'standard', but just a common/popular size. you can use a bag end bit, bit I just use a 3/4" trenching bit - or whatever I have to hand - it all works ok, and you end up with a useable dish. I recently left a couple of dishes where they could get damp (wet) and they weren't much use afterwards.