1 3/8" holes without a drill press?

[alex grams]

the freud forstner bit worked out well with a hand drill. My concern that the bit would tend to walk on me was pretty well alleviated. I would feel pretty comfortable making a jig out of wood for it for the doors I am doing.

Thanks again for all of the advice.

[Lee Schierer]

As a related note, most Euro hinges require a 35mm bore...be sure to use the correct size for a snug fit.

35 mm is so close to 1-3/8" that it isn't worth the extra cost for the 35 mm bit. The difference in diameter is only.0029", which should be plenty close for wood.

[alex grams]

the difference between the 1 3/8" and 35 is just enough to make the hole snug where i can push it in with my hand and it holds it tight while I am mounting them.

[Chris Padilla]

35 mm is so close to 1-3/8" that it isn't worth the extra cost for the 35 mm bit. The difference in diameter is only.0029", which should be plenty close for wood.

3 mil might be the difference but a little runout on the DP, or an unsteady hand, or worn bits or bits with a wide tolerance can change that number.

However, overall, I agree. In a pinch or if you don't feel like it, the 1.375" forstner bit will work fine. I happen to have standard and metric of just about everything because I got tired of dealing with some of the minute differences that turned out to be not-so-minute at times....

[Lee Schierer]

3 mil might be the difference but a little runout on the DP, or an unsteady hand, or worn bits or bits with a wide tolerance can change that number.

Wouldn't the same problems exist with a 35 mm bit? A worn 1.375 would most likely be undersize which would make it even closer to 35 mm. Most likely the tolerance on the cups isn't held closer than +/-.005 which would be fairly tight for mass production tolerances.

[Nissim Avrahami]

Correct me if I'm wrong but...
1" = 25.4 mm
3/8" = 9.525 mm

1-3/8" = 34.925 mm....
It looks like 1-3/8" is smaller than 35 mm....

I have a drill press but sometimes, the door is too big to be supported on the DP table so I'm using Drill-stand



























Regards
niki

[Greg Cole]

Ive done alot of them with a good cordless and the bit. It works fine. Thats it no jig necessary.

I did 28 doors in my kitchen that way too. I had all intentions of using the scrap wood jig I was going to make... but never got 'round to the building the jig part.
If you can drill a straight hole all ya need to do is control the depth which isn't tough either.

Greg

[Lee Schierer]

Correct me if I'm wrong but...
1" = 25.4 mm
3/8" = 9.525 mm

1-3/8" = 34.925 mm....
It looks like 1-3/8" is smaller than 35 mm....

You are quite correct, I forgot that I converted mm to inches not the other way around. 35 mm = 1.3779 inches. so 1-3/8 is about .003 smaller.

[Nissim Avrahami]

You are quite correct, I forgot that I converted mm to inches not the other way around. 35 mm = 1.3779 inches. so 1-3/8 is about .003 smaller.

No problem Lee

If I had $1 for every mistake that I made, I would not post in this forum but in the "Millionaires" forum (if there is such a thing)

Regards
niki

[Art Travers]

Use 1 3/8" forstner ..they work fine for euro hinges ...If you are so concerned run a few holes in scrap to make sure..