I have a keyless on my 12volt cordless but all my other drills are keyed. I use two holes. I have found that often there is a minute bit torque left in the second twist.
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From the "deep south" part of Canada
Richard in Smithville
http://richardspensandthings.blogspot.com/ -
I've absolutely had better luck getting tighter, straighter bits by using all three holes.Comment
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In a perfect world one hole would give even torque all around but chucks just aren't that much of a precision device, so I use all three holes to get even torque all the way around.Sometimes the old man passed out and left the am radio on so I got to hear the oldie songs and current event kind of thingsComment
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I worked for a machine shop for awhile and was taught that to get a true center to use all three. This applied to the lathe, milling machine, bore dog and anything else that had a chuck. We were rather picky 40 years ago. The shop was all belt driven then and the machines were not as good as todays, well, maybe. But, I still do all three sides.
Just my thoughts.Cork,
Dare to dream and dare to fail.Comment
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Thanks for posting that as I find it interesting. Maybe... just maybe that all three is better and there is a technical reason why? But.. I really don't have any problems doing one but again... if I do have one in the future I will go to all three.
As far as key-less chucks.. I hate them. The DP has key.. my 1/2" drill has keyed.. I changed out both key-less on my two 3/8" to Jacobs keyed.Comment
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I've always used all three. I guess the reason being that I was taught that way many years ago.
EdDo you know about kickback? Ray has a good writeup here... https://www.sawdustzone.org/articles...mare-explained
For a kickback demonstration video http://www.metacafe.com/watch/910584...demonstration/Comment
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I was taught to use all three but I only use one if it is a easy/quick hole. I don the same on a metal lathe. I was told using all three ensures all three jaws are equally tight.Opportunity is missed by most people because it is dressed in overalls and looks like work. - Thomas EdisonComment
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I use all three on the high speed air drills I use at work and go over them twice sometimes three times on small bits.The jaws tend to loosen on these for some reason.I tighten the chucks on slower drill motors for bigger bits with a small cheater pipe and do all three.These have lots of torque and the bits will spin in the chuck when breaking through the material.I think therefore I .....awwww where is that remote.Comment
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I was never taught anything, but I do tighten all 3, the reason is that I just tried it one day and noticed that even though the 1st one seemed tight, the 2nd one could still be tightened slightly. I'm sure this was because there was some play in that chuck, but it got me started doing all 3, and I still do it.Keith Z. Leonard
Go Steelers!Comment
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If nothing else you are triple checking that the chuck it tight enough to fight you when you try to loosen it to change bits.Opportunity is missed by most people because it is dressed in overalls and looks like work. - Thomas EdisonComment
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I bought a keyed chuck for my portable hammer drill, but honestly I cannot get the keyless off. They certainly make sure the chuck itself is attached, even if it lets go of the drill bitsAs far as key-less chucks.. I hate them. The DP has key.. my 1/2" drill has keyed.. I changed out both key-less on my two 3/8" to Jacobs keyed.
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