Author Topic: Different drilling tool  (Read 228 times)

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Offline coolford

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Different drilling tool
« on: January 03, 2022, 11:00:46 AM »
I have had this drill for some time, even used one like it in my early working days.  Has a special purpose.  Is not marked although some of the parts appear to be Millers Falls.  Over the years have not seen but two others.

Online skipskip

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Re: Different drilling tool
« Reply #1 on: January 03, 2022, 11:06:14 AM »
Pipe? or round stock?
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Offline coolford

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Re: Different drilling tool
« Reply #2 on: January 04, 2022, 07:33:35 AM »
You are correct here also skip-skip.  It clamps on a hot water or steam pipe (when not in use) and drills a hole for a petcock to drain off water or air depending on the need.  The correct bit has both a drill and threads.  Thus, it drills and then threads the hole in one operation.  So far I haven't been able to come up with the correct drill.

Offline JoeCB

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Re: Different drilling tool
« Reply #3 on: January 07, 2022, 09:03:50 PM »
Very cool tool !!!! ---- a tool for every job

Thanks for posting and good luck on finding the special drill/ tap

Joe B

Offline lptools

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Re: Different drilling tool
« Reply #4 on: January 07, 2022, 09:28:15 PM »
Hello, Coolford. Is it missing a chuck? Or would the bit thread on to the shaft?
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Offline coolford

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Re: Different drilling tool
« Reply #5 on: January 08, 2022, 07:50:46 AM »
It has a chuck, but it needs a drill with a 3/8" shaft to fit and tighten it correctly.  I did see one on another drill a long time ago but not since.

Offline JoeCB

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Re: Different drilling tool
« Reply #6 on: January 09, 2022, 09:52:48 AM »
If you got really creative with your tool grinding skills, a combination drill bit / 1/8 NPT tap could be made from a standard 1/8 NPT tap.

Joe B

Offline mikeswrenches

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Re: Different drilling tool
« Reply #7 on: January 09, 2022, 12:42:30 PM »
While you’re close on the application it was actually used to drill holes for sprinkler heads on irrigation pipes. The first one I had didn’t have a chuck. Just a hole in the end for the combination drill/tap and a square head set screw to hold it in. I can’t remember what I did with the second one.

I had it at the Flywheelers Antique Engine Show several times and got tired of explaining how it worked so I made up some pipes so I could hang it upside down so people could see how it worked.

I think you can buy the drill/tap’s commercially. We used to use similar ones when I was working at Buick.

It was patented in 1908 by G W Skinner. No. 893,667.

https://patentimages.storage.googleapis.com/b6/fd/76/cd8786b98a90d4/US893667.pdf

Mike
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Offline coolford

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Re: Different drilling tool
« Reply #8 on: January 09, 2022, 03:04:40 PM »
Thanks Mike & Joe---I wondered why the level seemed to be in the wrong place, but understand that they were drilling holes in the bottom of the pipe for misters.  I my youth I drilled holes in the top of hot water pipes in greenhouses so we could put in a petcock to let off air.

Offline john k

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Re: Different drilling tool
« Reply #9 on: January 10, 2022, 10:43:38 PM »
Was at a tool meet one time, fellow had brought in a half dozen different bench mount Millers Falls drills.  Some pretty big, all restored.  Looked like some of them could have used the hand crank or other bits from this one.
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