Please check your browser settings or contact your system administrator. I have since looked at the end of the set screw and it looks like the contact is more like trying to hold the drill krdg place with the end of a needle! When attempting to use the very first one, the collar slipped. Sign Up or Sign In. Miter Kreg jig stop collar event Workbench.

Don Chris Clute said: Thanks Don, Those split rings look like they should do the trick even better than trying to put a flat on the drill. I suppose it is quite possible to get a number of duds along the way. Perhaps tightening the collar before inserting the bit would confirm the clamping ability of the collar. You would want to do this often as the metal will fatigue. Did you still end up with a split ring collar as opposed to the standard depth collar?

Another option would be to approach a good bearing supply house and get a quality single piece shaft collar as an alternate. I personally never cared for using a set screw on drill bit flutes. The Kreg supplied collar works, but is not the best design for this application. Don John P. Stombaugh said: You might want to try one of these collars before purchasing them.

Regarding the collar slippage. Thousands of holes, wide variety of materials, not once a slip. Being a HD Mechanic for thirty-three years, I've been around set screw applications bazillions of times.

Before you decide to grind a flat on your step drill, consider the following analogy. Would you rather have a two hundred pound man wearing flat soled shoes stand on your foot, or a ninety pound lady wearing high heels? It translates to psi in any event. The localized pressure of the set screw on a curved surface results in a surprisingly high 'dig' factor spread over a tiny area.

The collar doesn't want to tilt because it has a large bearing surface. This is the lady in the high heels, who by now has poked a hole right through your foot. When the man with the flat soled shoes takes his turn, he applies a force of greater weight over a much larger area, and the resultant crush would be painful, but not life-altering to your foot.

When you offer the drill bit to the jig, I suggest you Kreg Jig Support Stop Network have it stopped until inserted and centered, then fire up to full speed before contacting the wood, feather the feed rate as you feel it pull in to the fiber, back off a time or two to prevent plugging, and only make the contact as firmly as the minimum needed to know the collar has met the jig.

It is, after all, a guiding device, and not intended for shock or impact. Pardon me if this is already your habit.

Like almost anything in life, you need to develop a feel for the application, and most things work predictably well. I also suggest that after the hole has been milled, do not make additional plunges, these won't improve the hole, and without the resistance of the fiber you began with, the impact to the collar could overcome it's designed stability.

Regards, Art. Well it appears that I am not the only person to have problems with the drill stop as you can see if you read some of the other replies of what other people have done to correct the issue.

I have since looked at the end of the set screw and it looks like the contact is more like trying to hold the drill in place with the end of a needle!

I will try a new set screw first then try a new collar which I think Kreg should think about providing. Art S. Hamilton said: Regarding the collar slippage. There is probably no right solution. I would happily agree with your footwear analogy on a standard shaft because not only do you get the concentrated "dig" where the set screw contacts the shaft, but you get a goodly amount of surface friction opposite the set screw. I will stand with my preference to have the clamping force distributed around the circumference because I do not believe the "dig" into the flute of the bit is desirable, and the amount of surface area available on the opposite side is minimal relative to a solid shaft.

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