cause the Plexiglas⢠to crack.) 4. Drill holes at your desired radius dimensions, large enough for the end of the cutting tool bit to fit through. (You could use a ...
By MARK E. EMINGER EAA 379500 RR 2 Otterbein, IN 47970
In reading a column by Tony Bingelis in which he described the circle cutter tool as one of the most dangerous tools in the shop . . . I couldn't agree more. Even the most cautious can receive torn shirt sleeves, skinned knuckles or worse, when using this tool, and the main reason is that you don't always concentrate on the arc of the "tool holding bar." I was thinking of a guard to make this tool safer and was explaining this to my wife Tina, when she expressed
her own idea. So together we came up with the following guard. The nice thing about it is that it takes only about 30 minutes to build, costs just a few dollars, and you can see your work through the clear Plexiglas™. 1. Cut a 7" diameter circle from
1/8" Plexiglas™. (I used a handheld scroll saw.) 2. Using sandpaper and a block of wood, make the circumference round and smooth, and deburr the edges to a nice radius. 3. Drill a 1/2" diameter hole in the center using a step drill. (I found that this was very easy to do and didn't cause the Plexiglas™ to crack.) 4. Drill holes at your desired radius dimensions, large enough for the end of the cutting tool bit to fit through. (You could use a slotted hole, but I was concerned about cracking the Plexiglas™, so opted for individual holes.) 5. Deburr all holes with a countersink.
6. Attach the Plexiglas™ guard to your circle cutter using a 1/2" diame-
ter shaft collar. The Plexiglas™ guards circumference gives you a very easy visual reference as to where or how close you can be without contacting the circle cutter tool. 90 JANUARY 1994
Using the aluminum template, scribe the outline on. Vs in. plexiglas, then mount the aluminum template on the airplane, securing it to the attachment tabs. 5.
sion Test,â December 2018). Ideally this is performed on a warm engine, but even on a cold one it can reveal some problems. What you as a buyer are look-.
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we have cut and trimmed quite a few â even added a couple of cracked ones to our old "boneyard" of ruined. Plexiglas. We experimented with dif- ferent tools ...
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