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Chris Owens - Bearhawk
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Date:  2-3-2012
Number of Hours:  2.00
Manual Reference:  
Brief Description:  Deburring nose ribs

I purchased a couple of Scotch-Brite wheels and a mandrel for the drill press so I could buff out the edges of the wing ribs. In hindsight, the router did a really fantastic job of cutting out the ribs, that I doubt that this process was really necessary. But the one thing that I want to avoid is splitting the metal during the pressing process of flanging the lightening holes. So I went ahead and did it to be safe.

The subject of Scotch-Bright comes up often, not only in the Bearhawk mailing lists and newsgroups, but in others as well. At the recommendation of one of the Bearhawk group members, I chose the Scotch-Brite EXL 8A Medium wheels purchased from Wicks Aircraft Supply. I bought both 1" and 2" wheels and required mandrels:

Wicks #936 Deburring Wheel Mandrel - 3/16"
Wicks #2XLUW8A Scotch Brite Unitized Wheel (2" dia. x 1" thick)
Wicks #1XLUW8A Scotch Brite Unitized Wheel (1" dia. x 1" thick)

I also purchased Wicks #F3753 Scotch Brite 7A Medium (6" dia x 1" thick) that is meant for a bench grinder, but turns out I didn't need it. I'll keep it around, though, as I'm sure it'll have use later.
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Those ribs put a nice ridge in the Scotch-Brite wheele

Those ribs put a nice ridge in the Scotch-Brite wheele

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93 nose ribs, deburred and ready for action

93 nose ribs, deburred and ready for action

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A close up view of the nice job that the Scotch-Brite wheel does on the lightening holes.

A close up view of the nice job that the Scotch-Brite wheel does on the lightening holes.

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