05-19-2016, 09:04 AM
(This post was last modified: 05-19-2016, 09:10 AM by the penguin.)
I have found in sheet metal, I drill the pilot hole and have a 1/4" smooth shaft in the holesaw arbor, it helps with the wandering, as the drill bit will cut with any kind of side pressure.
About 95% of my holesaw use is with a cordless drill, usually, where I have to drill, is rarely able to put into a drill press. Just last week, I drilled 4, 6" holes, through 3/16" steel, with a hole saw in the stack assembly of some boilers, so I could weld stack sampling adapter into the stack. A 6" holesaw and a hand drill is a fun time, especially 10 feet in the air, on a step ladder,
About 95% of my holesaw use is with a cordless drill, usually, where I have to drill, is rarely able to put into a drill press. Just last week, I drilled 4, 6" holes, through 3/16" steel, with a hole saw in the stack assembly of some boilers, so I could weld stack sampling adapter into the stack. A 6" holesaw and a hand drill is a fun time, especially 10 feet in the air, on a step ladder,
jack