theoldwizard1
Well-known member
This is a brand new Diablo 3/4" auger bit. For those mathematically challenged, 3/4 is 96/128 !
Hmmm ....
- Thread starter theoldwizard1
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alfadan
Well-known member
Maybe missing something, but aren't you measuring a clearance dimension on it?
dnschmidt
Well-known member
Drill a hole and measure the diameter of the hole. What you've shown proves nothing unless you put the calipers in exactly the right place which it appears to me that you didn't.
ArcReactorKC
Well-known member
Why are you measuring in the upper jaw part of those calipers?
zimman
Well-known member
Frankly its a hole in wood, not a critical part of the International Space Station. Y'all need to relax a little.
Zim
Oh, and who has a caliper that measures in fractions? Get a chart. LOL
Zim
Oh, and who has a caliper that measures in fractions? Get a chart. LOL
Lots of digital calipers can show fractions. I’ve never wanted the feature, but people seem to like it.
zimman
Well-known member
And we won't answer why. Every Kennedy tool box has a conversion chart in the lid. Ahahahahhaha. Kidding of course.
Zim
dnschmidt
Well-known member
Now that shows pure ZEN.
Ohio Andy
Well-known member
I bought one specifically for woodworking that shows fractions.
Ironically, I was trying to identify a particular postage stamp and one of the ways to attempt to differentiate it from another was by measuring the thickness of the paper. I bought one specifically measure that paper that's rather accurate.... I'm not sure if that one does fractions or not...
And the dimensions may not be critical for a space station, but if I need it to fit a particular size. Dowel and it doesn't fit. That's kind of a problem for me.
Ohio Andy
Well-known member
I bought one specifically for woodworking that shows fractions.
Ironically, I was trying to identify a particular postage stamp and one of the ways to attempt to differentiate it from another was by measuring the thickness of the paper. I bought one specifically measure that paper that's rather accurate.... I'm not sure if that one does fractions or not...
And the dimensions may not be critical for a space station, but if I need it to fit a particular size. Dowel and it doesn't fit. That's kind of a problem for me
That's not the correct but if you're looking to get a precise (wood) dowel fit
Ohio Andy
Well-known member
Well I will admit that the first problem is if I buy a 3/4-in dowel, how big is it really.
OccupantRJ
Well-known member
Is this really Dunning-Kruger at play, or a test?
OP
theoldwizard1
Well-known member
Most electronic calipers do mm, decimal AND fractions.
OP
theoldwizard1
Well-known member
signcrafter
Well-known member
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According to Google that's 16.073 mm. Wonder if it's a Chinese bit and they just do mm?
PugetDude
ALLIANCE MEMBER
That caliper is useless, for real accuracy you need one graduated in 1/256" increments.
Ohio Andy
Well-known member
Wooden dowel. Dowels, are often not uniform or highly accurate in width. And if I will glue it in place it must fit precisely so the hole must be correct.
Think precise woodworking
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orangeblood
Well-known member
As my Dad was found of quoting "It's a fence. We're not building a piano. It's close enough."
gahrajmahal
Well-known member
Oldwizard1, I found when drilling deep holes in pressure treated wood I had better luck using a new twist drill than paddle bits or the type you show. I was attaching joists to deck posts, 6 x 6 and needed long bolts to go through and be tightish. When I used paddle type bits hey walked inside the post when it hit harder bands in the grain. Even thought the bolts would start in the holes they couldn’t follow the wavy path inside.
purplezr2
Well-known member
I like to spin bits backward between the jaws to make sure that I don't measure the narrower portion behind the area that cuts.
Appears you are measuring it wrong. Did you measure the hole sizes it drills(don't see an answer to this). Did the bolt not fitting drive you to measuring the bit?
Appears you are measuring it wrong. Did you measure the hole sizes it drills(don't see an answer to this). Did the bolt not fitting drive you to measuring the bit?
niget2002
Well-known member
They're expecting your drill to wobble while cutting :-D
alinc100
Well-known member
Ok for the rest of us, (who don't put a caliper on an auger bit for PT wood) what size hole did it drill? Are you satisfied with the hole size, cutting speed, performance?
PugetDude
ALLIANCE MEMBER
Holychit! A whole thread about holes. Must be a slow day in the cart maintenance department at Home Depot.
DAWrench
Well-known member
It's a bit for wood not metal. Drill the hole and hammer the bolt in if you need to. Tighten the nut and be done with it
PugetDude
ALLIANCE MEMBER
Excellent advice. What size plug would you recommend for welding up 1/8" holes in sheet metal?
zimman
Well-known member
Epic. Just epic and I thank you.
Zim
Ohio Andy
Well-known member
I'm thinking I don't want to see your hand cut. Dovetails on any cabinets you build.... Or maybe I do, might make me feel better about mine.
signcrafter
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OP is bolting pressure treated wood together, not fine finish work. An auger bit isn't that right tool for finish carpentry detail work. Be like using a low tooth count blade for finish cuts instead of a fine tooth finish blade. Or 36 grot sandpaper to do a smooth finish. There is a right tool for every job.
OP
theoldwizard1
Well-known member
ArcReactorKC
Well-known member
Still curious if you have plans to check it properly?
I would think you would need to check the leading edge not further down the drill, and use the tips of the calipers as designed.
I would think you would need to check the leading edge not further down the drill, and use the tips of the calipers as designed.
Did you spit on it first?
There's absolutely a difference. The snail forces a feed rate of whatever the thread pitch is. That's fine for blasting holes in studs, but it can be too fast for stuff that's harder to drill. If you look at auger bits used in braces, they have much finer threads.Not much difference (except the tip) between this and a twist drill.
RTM
Well-known member
I have three different thread pitches on different auger bits. My good RJ ones have a very fine threads. My coarse single spirals are much coarser. And some that seem in between might be double start, I’ve never counted them.
All with a tapered square tang for braces.