Chip removal in tap holes

[Openwater]

I'm a newbie trying to learn, but I have read about using a can of aerosol duster to clean out holes and figured I'd try it this year. I do have a proper tapping bit on the drill, but with the skinny straw on the duster can, I think you could easily blow-out the hole with just a quick spray of air; probably without even having to contact the wood/tree.

[t-ciccarello]

Sticking anything into the tap hole, unless the item is sanitized between holes, is a good way to prematurely introduce bacteria into the hole and shorten it’s production lifespan.

Being a nurse by trade, I’m used to seeing the sterile wrapped q tips on the long wooden shafts. I wondered if I bought a sleeve of them, & used one per tap hole if that wouldn’t keep it at lower risk for bacteria.

[Sugar Bear]

Part of my living is made from woodworking these days and been doing it for a while now. It has taken me several years to accept the fact that not all bits are equal for removing wood chips from a bored hole.

Some bits remove chips from the hole substantially more effectively then others. The sharpness of the tip has something to do with that but just recently I lost or had stolen a box of original Craftsman drill bits passed on to me by my father, that were in mint condition. I noticed that the bits had an outstanding ability to hold and remove cut/drilled wood because of the design of the helical fluting up the shaft of the bit. The fluting had a more circular cross section in it allowing the bit to better grasp and remove the wood out the flutes of the bit itself. Makes for some frustrating cleanup of the bit after the hole is drilled and perhaps that works against you sanitation wise for the next hole drilled but the design removes chips from the hole more effectively.

Additionally a dull bit or bit with dull side blades is more likely to rip wood rather then cut it as it spins through the hole, causing bigger chips that are more difficult to slide out the helical fluting of any drill bit whether it be a well designed flute or not.

Finding that old craftsman box of bits is one of my biggest problems these days. My girlfriend bought me six locator beacons for Christmas. But so far I only have locator beacons on my phone and keys. The old Craftsman drill box is next. If I ever find it.

I am not sure how the expensive Leader "tapping bit" works as I have been too cheap to buy one but the extra cost and design may well be worth it if chips in the hole are the problem of your day.

[ennismaple]

Run the drill at full speed in and out in one motion and there shouldn't be any bits left in the hole. Acknowledged that we're only using 5/16" tubing on mechanical vacuum so our fittings are less likely to get plugged up than 3/16" gravity lines.

[johnallin]

Being a nurse by trade, I’m used to seeing the sterile wrapped q tips on the long wooden shafts. I wondered if I bought a sleeve of them, & used one per tap hole if that wouldn’t keep it at lower risk for bacteria.

That could work, but it's lots of wrapping and Q-Tips going to the trash, also not sure you wouldn't be just pushing chips further up into the hole.
A twig acts sort of like a brush or a pick and seems to pull chips out at you withdraw it. You're still on the right track though trying to eliminate chips with 3/16 tube fittings as small as they are...

[Sugar Bear]

Run the drill at full speed in and out in one motion and there shouldn't be any bits left in the hole. Acknowledged that we're only using 5/16" tubing on mechanical vacuum so our fittings are less likely to get plugged up than 3/16" gravity lines.

Yes this would be good sage advice. And have been using that approach for a few years now.

But incorrect bit design of the tip and flutes and poor condition of the blades can still leave some of the flute core in the hole even when the in out in one stroke approach is taken.

The absolute answers are always in the absolute details.

[mainebackswoodssyrup]

Ennismaple is right, remembering to pull the drill out without letting up is key. I catch myself every now and then not paying attention. If you let off ever so slightly; you may get chips. We never used tapping bits until we tried one. Now I buy a new one every year, 2 at the most. They’re worth it.

[Sugar Bear]

If you let off ever so slightly; you may get chips

The statement

"Because you will give any chips in the flute of the bit, as it is coming out of the hole, the time and thus friction needed to grab the wall of the tap hole and be pulled back down the flute of the bit and back into the hole"

will make thorough believers out of that.