How I made the Large Routed bowl.
I have had some questions about how I made the bowls I posted in the Projects area. I thought a Blog entry would be the best way to respond. This one is for the larger bowl. It is 16” outside diameter. The center bowl is 3-7/8” in diameter. The wall thickness is 1/2” all around.
I bought the CMT Bowl & Tray kit which has two MDF templates, a collet extension, and a bowl bit. It worked great. If you already have a collet extension you can just get the bit and make your own templates. If not, get the kit you get all four pieces for about what you would pay for the extension and bit.
You use the bottom template for the large bowl and the top one for a tray. The included DVD says to place the template on your wood, draw your lines, then move it a quarter turn and make another set of marks, continuing around the piece until you have all four quadrants drawn. After hogging out the excess wood you do the same thing using the template to route out the bowls to size. Too Many Moving Parts for me. I followed the process to make a full sized template. That way if I messed up I just ruined my template not my walnut and maple stock.
The process is pretty straight forward. Glue up your stock (I have seen some pretty wild patterns in the Projects folder), draw lines using the template, hog out the majority of the wood using a large Forstner bit in your drill press, the use the template to guide the router bit around to finish off the design.
Once the inside is done you need to draw a circle 1/2” larger than the bowls, cut it on using a bandsaw or jig saw, sand it down and apply a finish.
This winter I got a trammel to cut large circles using a router. For my next bowl I am going to use it to cut a template for the outside diameter and use my router to trim the outside to size thus cutting down on the amount of sanding I have to do.
I hope this answers the questions that were raised. If not, give me a shout.