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Accurately drilling a hole in a dowel

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Forum topic by paulmon posted 11-20-2019 07:28 PM 540 views 0 times favorited 13 replies Add to Favorites Watch
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paulmon

77 posts in 693 days


11-20-2019 07:28 PM

Topic tags/keywords: drill dowel

Even if you never have to do this, it’s kind of a nifty trick anyway…

https://youtu.be/v5yx1C-maRo


13 replies so far

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bondogaposis

5569 posts in 2909 days


#1 posted 11-20-2019 07:38 PM

Same thing can be done on a lathe.

-- Bondo Gaposis

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pottz

6987 posts in 1543 days


#2 posted 11-20-2019 08:33 PM

cool tip,thanks.

-- sawdust the bigger the pile the bigger my smile-larry,so cal.

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jbmaine

64 posts in 28 days


#3 posted 11-20-2019 10:07 PM

That’s pretty neat, thanks for sharing.

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BurlyBob

6755 posts in 2824 days


#4 posted 11-20-2019 10:25 PM

That is a nifty idea.

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paulmon

77 posts in 693 days


#5 posted 11-21-2019 04:45 AM



Same thing can be done on a lathe.

- bondogaposis

Which I happen to have, but I thought there might be others who don’t.

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Planeman40

1467 posts in 3319 days


#6 posted 11-21-2019 03:55 PM

This brings to mind another trick to drill a hole in a dowel (or anything round) in the SIDE of a dowel AND GET IT CENTERED IN THE MIDDLE OF THE DOWEL!

Put the dowel in a drill press vise in a position to make the hole. Then take a straight piece of thin metal (I use a small 6” metal ruler) and lay it across the dowel where the hole will be. Then insert a small rod with a tapered point on the end into the drill press chuck and let the point rest upon the metal ruler at a point about in the middle of the dowel. The ruler will tilt away from level unless the point is exactly over the center of the round dowel. Move the ruler and dowel back and forth. When the ruler is exactly level, that will be the point where the hole will drill through the center of the dowel. Swap the pointed rod for the drill bit and drill away!

-- Always remember: It is a mathematical certainty that half the people in this country are below average in intelligence!

View HokieKen's profile

HokieKen

11521 posts in 1697 days


#7 posted 11-21-2019 04:06 PM

The idea here is good. I’m not sure the execution is so much though… He puts the drill bit in the chuck to make sure it’s perfectly aligned in the vise, right? But then he lowers the table during which it also swings sided-to-side visibly. Then once he puts the drill bit in and lowers it, he visibly swings the table back over to “eyeball” the alignment with the dowel in the chuck. Also, the drill bit visibly walks off when he starts it and when he retracts it :-/

Just a machinist’s observations :-/

-- Kenny, SW VA, Go Hokies!!!

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pottz

6987 posts in 1543 days


#8 posted 11-21-2019 04:08 PM



The idea here is good. I m not sure the execution is so much though… He puts the drill bit in the chuck to make sure it s perfectly aligned in the vise, right? But then he lowers the table during which it also swings sided-to-side visibly. Then once he puts the drill bit in and lowers it, he visibly swings the table back over to “eyeball” the alignment with the dowel in the chuck. Also, the drill bit visibly walks off when he starts it and when he retracts it :-/

Just a machinist s observations :-/

- HokieKen

i noticed that too,pretty much took away any accuracy there was.

-- sawdust the bigger the pile the bigger my smile-larry,so cal.

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paulmon

77 posts in 693 days


#9 posted 11-21-2019 04:21 PM

Actually, that’s kind of the point. When you see the drill bit walk off it is the drill will self centering on the spinning object.

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HokieKen

11521 posts in 1697 days


#10 posted 11-21-2019 04:29 PM



Actually, that s kind of the point. When you see the drill bit walk off it is the drill will self centering on the spinning object.

- paulmon

So then why put the drill in the chuck upside down to locate it in the vise? Guess I missed that point. Had to watch with no sound…

-- Kenny, SW VA, Go Hokies!!!

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paulmon

77 posts in 693 days


#11 posted 11-21-2019 04:32 PM

If you drill it ‘the normal way’, it won’t self center. But with the dowel spinning, it makes the bit automagically seek the center of the dowel.

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HokieKen

11521 posts in 1697 days


#12 posted 11-21-2019 04:34 PM

I’m tracking now. Thanks for the clarification Paul. I should have watched with sound before opening my mouth :-) I retract my earlier statement about poor execution.

-- Kenny, SW VA, Go Hokies!!!

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paulmon

77 posts in 693 days


#13 posted 11-21-2019 04:37 PM

Glad you ‘fixed’ it :)

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