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Making Some Bowls Continued
Here I'm working on the inside diameter which isn't to depth here
either.
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This is how far I was able to cut with my
1/2" cutter. I'll use a flush-cut trim bit on my router table for the outside later.
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Now that both the I.D and O.D. have been established it's
time to remove all the material in the middle area. I'll be using a 1.0"
diameter Forstner bit and notice the rpm callout on the shank. It says,
"450 max rpm". so I started with about 400 rpm to see how it worked.
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This is what one hour of work looks like with that Forstner bit set at
400 rpm. Yeah, I know...way too slow. Now it's time to kick it up a
little.
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This is what one hour looks like with my mill set to 900 rpm. Much
better to say the least. Note the clamps on each corner now: this is how I
got away with that amount of rpm because of the rigid setup. Otherwise
bad things will happen.
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I used some pliers to remove all the standing pieces as
they broke off very easy. If I ever do this again, I'll buy a larger
Forstner bit. Also, I still have more than 3/8" to go on the depth
below, which I'll
do with my router and a bowl bit.
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Speaking of my router, that's how those lines were made while I was
plunging with my cutter earlier. Now it's time to sand them out.
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I could have done this by hand but I decided to use my milling machine
with a sanding drum. This worked great and didn't take long.
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More Tooling
Now it's time to work on the floor of the bowl so I'm making more
tooling. The size of the MDF is 12" X 18" X 1/4" and
this piece will ride on the top of the bowl while
I'm cutting wood on the floor of the bowl.
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What I have here is a 1 1/4" diameter bowl bit with a 1/4" radius
on the bottom, held
in an extension so I can reach the bottom of the floor.
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