Posted Sun Dec 31, 2006, 4:31pm Subject: How I made my Bottomless PF
Inspired by lyketalurn's thread I thought I'd post my process of going bottomless in pictures. I didn't actually take the pics as I did it but kind of recreated it so that you get the idea.
The items needed are: - a 2 3/8" hole saw drill bit and mandrel (the part that you attach the bit to). make sure the hole saw bit is rated for cutting metal. Some are only for wood, such as ones that are made for installing deadbolts in doors. -a drill -a file -sand paper -Eye protection
Posted Sun Dec 31, 2006, 4:33pm Subject: Re: How I made my Bottomless PF
As you can see the mandrel (what you attach the bit to that holds it onto the drill) is the type that has a smaller drill bit in the center. This was somewhat helpful for lining up the drill bit but not necessary as the 2 3/8" bit is such a good fit that it mostly probably would have lined itself up anyway.
Here's a closer look at the pilot bit that is attached to the mandrel:
Posted Sun Dec 31, 2006, 4:37pm Subject: Re: How I made my Bottomless PF
Wear eye protection. Try and keep the drill straight up and down with some downward pressure on it as you drill. If you don't put pressure on the drill it can move around or possibly kick out and it you won't get anywhere.
Posted Sun Dec 31, 2006, 4:39pm Subject: Re: How I made my Bottomless PF
The danger of just drilling and doing nothing else would be sharp edges that can cut hands. You need to make those edges dull by rounding and/or flattening them. I used a file first. Round for the inside:
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