I was using a mini Kreg Jig to attach two legs together as a brace. Initially the drill went through the wood like a hot knife through butter, but the drill bit must have been dulled during the process as the bit no longer went through the wood easily. Is this normal? Can the bit be sharpened? What would’ve caused the bit to become dull so quickly? If anyone has experience with this, I’d appreciate the advice. Can the drill bit be replaced inexpensively?
Wowie that’s going to be a hard drillbit to sharpen.
Usually, if it happens quickly during drilling softer materials, overheating from high rpm is the cause of it dulling.
That could have happened.
I’ve been using the same kreg drill for about eight years, only on hardwood, and it works well. You can sharpen them easily enough with a file. If you can do without it for a week, Kreg will sharpen it for the cost of postage - $5 ea. For me, living outside the US, it’s cheaper to buy a new non-Kreg one from amazon or such than the ten weeks and $40 return to Kreg. https://www.kregtool.com/tool-specs/drill-bit-sharpening-service.aspx
Thanks Mike!
I just got a replacement from Amazon today so have not tried it. It gets good reviews though and it was only $12 . . . https://www.amazon.com/gp/product/B00002240L/
@Jim_In_Ashland Thanks Jim. I think I’m going to try the sharpening service first. But I didn’t realize they were that inexpensive.
I’ve used my Kreg jig a bit and the drill it came with seems to be holding up to me. I use pocket holes as my crap joinery. So that means I use it on pretty crappy stock too. Like scrap particle board etc.
Of course they could be sharpened. Still, you have to have a special jig and the “special how to”. 
@Alex_Paverman When my bit gets dull I won’t use any kind of a special jig. I’ll try to muster up some special how to though. I’ll probably just hit it up with some tool room sticks and see if I can’t restore an edge like that.
@Paul_Frederick I assume you are talking about drills. They can be sharpened by hand by one who knows what he’s doing. Probably like you. But it’s better to usa a jig to achieve the correct simetry and the right angles.
@Alex_Paverman Kreg drills are stepped counterboring drills. So they would be hard to do on a machine. At the factory I imagine they have custom profile dressed grinding wheels they sharpen the drills on. They may even use a CNC grinder?
Off handing plain old twist drills is easy enough to do if someone just studies the geometry of the tool some. What most don’t do is dress their grinding wheels right to do a decent job of it. Then they’ve failed before they even get a chance to start.
I worked for a while in a tool and die shop that made wheel dressers though so they were pretty in tune with wheel dressing there. I picked up what I know about it there too.