Comments by "Paul Frederick" (@1pcfred) on "Best Hole Saw Brand? DeWalt vs Milwaukee vs Irwin, Bosch, Lenox, Diablo, Bosch, MK Morse" video.

@darkwinter6028 I've cut enough metal to appreciate the effect speed has on the process. It does not sound like you've had quite that much experience to me. Or you're just not receptive to subtle things. Some people are not. But that's why the foreman had me rebuild dressers and not other guys that had been in the shop for decades. I still put in my time doing production boring though. Let's just say there's a magic speed for every tool to run. There's many factors that go into determining exactly what that speed is too. When you know all of the factors it isn't even magic. The results just look like magic.
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Maybe not much higher. HSS is 100 SFPM and carbide is 400 SFPM. This test was run at 173 SFPM. So a bit on the speedy side for the HSS.
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@darkwinter6028 you do realize that time was a factor that was used in this test, don't you?
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@Eric12886 there are other fields beyond construction. But you do bring up a valid point. Poor practices are going to produce less than optimal results. So that condition does need to be tested. It is surprising what can be achieved when things are done right though. In the name of productivity Project Farm could do a video on speeds and feeds. It is a topic more should be aware of.
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@Turbochargedtwelve I have a mill so I will.
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@woopimagpie without the centering bit hole saws do tend to wobble. That just makes them cut a wider kerf. So they do have to remove more material. Running hole saws without centering bits is a technique I've used on a lot of jobs though for various reasons. I've even used hole saws to cut semicircles. Like this https://i.imgur.com/kn1eyOt.jpg
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@dpmulvan there's really no way to compare HSS to carbide as they both need much different operating parameters.
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I left a comment with similar sentiments. Carbide is not HSS. Being different they do like different running parameters too.
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If you need to punch a big hole into a piece of steel a hole saw can be the ticket.
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@darkwinter6028 what you say is only true in a non-competitive environment. On race day if you expect to win you'd better have second gear.
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@darkwinter6028 in this situation we're just trying to determine the highest performing tool. We can't do that unless each tool is pushed to its limit. That's how we make the determination.
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I have heard that carbide tooling benefits from a rigid machine. Being brittle it just does not like to bounce around a lot. Carbide is also made to run faster than HSS. So they may have been factors that influenced results? Still great testing though.
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