I started building my worktop today. 3mm holes were no problem, holes in the rulers were a bit tight to get the guide pins in but a firm push did the trick.
After drilling all the 3mm holes, the 20mm holes proved to be more difficult. The first hole went well. Second hole the boring bit locked up in the guide. I was able to tap the bit out of the guide, checked the bit and guide for damage, but could not find anything. Inserted the bit back in and it was able to move freely.
So, attempted to finish the second hole, went without problem. Third and fourth holes also no problem. The during the fifth hole, the bit locked up again. This time tapping it out is far more difficult, to the point that I am afraid to apply more force, and the bit is still stuck...
I was drilling at high speed with a Festool C15, wile applying minimal force. Pulled up regularly to clear chips, vacuum hose near the guide to suck up all debris.
What did I do wrong? And what should I do with the bit and guide, to separate them?
I had no patience and searched the forums for more info. Found the info about the possible burr. I tapped out the bit with a little more vigor, and checked both bit and guide. I found burrs on the bit. I hit the burrs gently with a file, and now the shaft of the bit feels smooth again. I can get the bit into the unused bushing, but the bushing used for the 4 holes feels much tighter. I can see scratches in the bushing...
I can't fathom how the burrs got on the bit though. One was on a part of the shaft that is not in the chuck at all... I guess I need to contact Axminster about this?