Hole saw for a big hole.
Hole saw for a big hole.
Rather than trying to drill and bore out a 2 1/4in hole through 1/2" plate, I thought I'd try to use a 2 1/8in hole saw. It worked well, but I had to cut some chip clearance on the inside of the curve. This and a few boring bar passes and it was done. Saved quite a bit of time. Oh and I got to use the Sebastian and May lathe from the '80's.... 1880's that is. (The 4 jaw is newer, obviously.) Couldn't grip this plate in the ATLAS 6" chuck.
OSHA would love this lathe...NO GUARDS ANYWHERE
--earlgoOSHA would love this lathe...NO GUARDS ANYWHERE
Before you do anything, you must do something else first. - Washington's principle.
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Re: Hole saw for a big hole.
Yep! Chip clearance holes are the answer when using a hole saw on anything thicker than a 1/8-3/16. Otherwise you spend lots on time retracting to clear chips.
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- SteveHGraham
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Re: Hole saw for a big hole.
You ever price one in that size??SteveHGraham wrote:No annular cutter?
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Re: Hole saw for a big hole.
I thought everyone here but me was rich.
Every hard-fried egg began life sunny-side up.
Re: Hole saw for a big hole.
Treplaining would also have worked.
Re: Hole saw for a big hole.
The machine was designed back when machinists knew where not to stick their fingers and other appendages. Nowadays, the nanny state insists that we be protected from every possible thing that could ever go wrong, even things that have never happened. I'm surprised the OSHA people haven't mandated that cutting tools not have sharp edges.earlgo wrote:OSHA would love this lathe...NO GUARDS ANYWHERE
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Music isn’t at all difficult. All you gotta do is play the right notes at the right time!
Music isn’t at all difficult. All you gotta do is play the right notes at the right time!
Re: Hole saw for a big hole.
To be fair, I've seen plenty of photos of machinists "back in the day" who apparently did not know where not to stick their appendages.BigDumbDinosaur wrote:The machine was designed back when machinists knew where not to stick their fingers and other appendages. ...earlgo wrote:OSHA would love this lathe...NO GUARDS ANYWHERE
Dave
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Re: Hole saw for a big hole.
I had need to bore a 90mm hole at a 45 degree angle through a large thick PVC tube [a round tank actually].
I couldn't find a 90mm holesaw; I did find one online but the postage they were asking was simply silly.
Besides, it wasn't deep enough to make the angle.
So, I made my own.
I couldn't find a 90mm holesaw; I did find one online but the postage they were asking was simply silly.
Besides, it wasn't deep enough to make the angle.
So, I made my own.
Re: Hole saw for a big hole.
Nicely done. I like your holding fixture.
--earlgo
--earlgo
Before you do anything, you must do something else first. - Washington's principle.
Re: Hole saw for a big hole.
That was definitely creative! I've had some questionable setups on my mill table from time to time. But when you have a part to hold and it doesn't fit in the vise, what's a guy to do? There should be a thread somewhere of questionable setups. That's likely to be scary!earlgo wrote:Nicely done. I like your holding fixture.
--earlgo
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Re: Hole saw for a big hole.
Well, it's only PVC... 10mm [3/8"] thick. it bounced around a little as the teeth hit but settled down as the groove progressed.
The tube I used for the saw is really thick, also about 10mm, but it was all I had to hand with the OD I needed. I brazed on used carbide inserts as cutting teeth.
I used a 25mm center shaft as I had one with an M2 taper on it already. Obviously, I drilled the guide hole first.
The tube I used for the saw is really thick, also about 10mm, but it was all I had to hand with the OD I needed. I brazed on used carbide inserts as cutting teeth.
I used a 25mm center shaft as I had one with an M2 taper on it already. Obviously, I drilled the guide hole first.