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The Quik-Lok chuck #42-66-0055 (fine print) says it also accepts "3 flat shank bits". Someone at K-Drill had the foresight to make the input shaftto 3 FlatShankBit specs. The drive adapter that comes with a K-Drill fits right in the #42-66-0055 Quik Lok Chuck.
While I was at it I also submitted a comment to Milwaukee asking for a powerhead specifically design for ice fishing and / or a full ice auger to go in there line up. They have weed whips and chain saws now, why not add a feature built auger. In doing so I suggested adding an option for the QUIK-LOC to be standard on the mud mixer.Doubt anything will happen, but perhaps the more people that ask the more likely. Also, can't complain unless I've submitted a request
You guys are trying to install some BOGUS ADAPTERS into the Milwaukee #42-66-0055 Quik-Lok chuck. I simply stated the K-drill shaft, also the Eskimo Pistol shaft slide right into the Milwaukee #42-66-0055 Quik-Lok chuck. They go in and stay in. They will release when you pull the release coller. Again: BOGUS ADAPTERS need not apply.
Maybe the "newest" k drills (can't speak for the Pistol) have a different shaft configuration than the k drill I got last year?At that time the k drill did not fit the 42-66-0055, it had to be machined to 6 sides and the locking groove added.I have 4 of the 42-66-0055 chucks on the shelf and they measure the same as the one I used on mine.We can only hope that K drill and Pistol listened and changed the shaft!
Surprisingly, the groove does not seem necessary to hold it in place, actually it seems to serve no purpose at all.
I agree with Whitefish, our adapters are not bogus and do not fit into the QUIK-LOC system. Stock from K-Drill (few years old however) they did not fit into the Milwaukee Quik-LOC assembly at all. We have two K-Drills in the family and neither of them would slide into the quik-loc without modification. This weekend I took the stock shaft / adapter and machined the 3 extra sides onto it to make it hex and turned a groove into it (see pictures below). Surprisingly, the groove does not seem necessary to hold it in place, actually it seems to serve no purpose at all. The QUIK-LOC seems to be designed such that you can push any hex shaft into it but not pull it out until you pull the release collar. So when you are pushing down on the auger (with just the weight of the drill) the K-drill modified shaft and the extension shaft push into the QUIK-LOC past the retaining groove until it bottoms out. Strangely the shaft can't be pulled out at all...not even back such that the retaining balls are in the groove if that makes any sense. I still like the idea of having the groove incase something does wear a little and the shaft does start to slide back it certainly will not fall out once the retaining balls hit that groove. I don't really have any pictures that depict what I'm trying to say. In any event, I did attach the pictures of the stock K-Drill adapter AFTER I machined 3 extra flats on it (the original 3 flats were chewed up pretty good, I tried to clean them up the best I could).Will be testing the system on the new Mud Mixer for the first time over the new year up on Red Lake. Hope its all its cracked up to be, slightly worried about the mixer cutting out due to thermal issues as a few other noted.
The way the the chuck is designed it would appear that it is holding the bit in, and in fact it will "sorta" hold the bit in with out the groove but it's really only spring pressure.There is a wedge type spring loaded "cam" in the chucks that puts pressure on the 3 balls which in turn pushes the balls against the bit shaft, if pushed far enough the balls will "snap" and lock into the groove so it really is locked in!I had a couple of applications in the log home industry as well as a local company that make mud mixing bits that had bits made that did not have the groove in the ends to start with.If there is any pulling force on the bit like a long auger bit it "WILL" eventually come out especially if the bit wiggles a little while using it.The Quik-lock was designed back in the day for lineman so the bits were easy to put in and take out while up on a power pole.You did the right thing by putting the groove in.
The pictures in your post are not the #42-66-0055 Quik-Lok. The attached picture shows the regular Quik-Lok (On the left) that accepts a 7/16 (.437) HEX.The mentioned #42-66-0055 Quik-Lok on the right accepts 7/17 HEX. tools, and the 3-Flat shafts as the Concrete Drills and the Eskimo Pistol, newer K-Drill have. If some other BOGUS adapters don't fit please blame the manufacturer of them and not Milwaukee. The Milwaukee #42-66-0055 Quik-Lok only fits the Milwaukee SuperHawg and the MudMixer.