Festool 9mm drill bit

[Kodi Crescent]

Looking at the drill bits.  I see them in increments that go up to 8mm, and then skip to 10mm.  How come there isn't a 9mm bit?

 

[AlexThePalex]

9 mm is an odd number that is hardly used.

If you need 9 mm holes, I can point you to something else that might work.  [wink]

 

[Sparktrician]

9 mm is an odd number that is hardly used.

If you need 9 mm holes, I can point you to something else that might work.   [wink]

Too much blow-out on the back-side, Alex...

[jawdrop]

 

[epicxt]

.38 or .357 would work for that as well. Just clamp a sacrificial block where needed...

 

[Kodi Crescent]

I'm curious if there is any connection between the suggested methods and the lack of this size drill bit.  Maybe just a coincidence?

 

[semenza]

I'm curious if there is any connection between the suggested methods and the lack of this size drill bit.  Maybe just a coincidence?

I seriously doubt it.

Seth

 

[epicxt]

Sorry for the OT posts. Back OT, in a previous life I was a bike mechanic and I know that snap-on would sometimes have metric wrench sets that excluded 1 or 2 sizes as well.

 

[AlexThePalex]

It's just that in metric world, not every single number is used that often. M7 and M9 bolts are basically not used at all, so it's a little bit pointless to make drill bits for that size. People will mostly choose 6, 8 or 10 mm.

I had an office chair from which one wheel axle broke. Turned out it had a 7 mm diameter. I thought, I'd simply replace it with an M7 bolt. I was stunned to find out M7 bolts just weren't sold. Nowhere. I couldn't even find an M7 tap cutter to make my own. After a long search I found a metal company that custom made these bolts. 

Only metal sets will include those odd numbers, but generally not wood and stone sets.   

 

[tjbnwi]

Sorry for the OT posts. Back OT, in a previous life I was a bike mechanic and I know that snap-on would sometimes have metric wrench sets that excluded 1 or 2 sizes as well.

I recall the sets not having an 18 mm wrench for about 5 years. The socket sets had 18's but not the wrench sets.

Tom

 

[Kodi Crescent]

I was wondering if the lack of the 9mm bit had to do with it matching the caliber size.  I was wondering if there was some foreign "regulation" that we weren't aware of because someone may "fabricate" something that the government doesn't want them to have, hence my question.

 

[AlexThePalex]

I was wondering if the lack of the 9mm bit had to do with it matching the caliber size.  I was wondering if there was some foreign "regulation" that we weren't aware of because someone may "fabricate" something that the government doesn't want them to have, hence my question.

No, that has nothing to do with it, there is no such regulation. It's just that 9 mm is hardly used.

For metal drill bit sets it's usual to buy them with 1 or 0,5 mm increments and they do include 9 mm bits.

[attachthumb=1]

 

[greg mann]

I was wondering if the lack of the 9mm bit had to do with it matching the caliber size.  I was wondering if there was some foreign "regulation" that we weren't aware of because someone may "fabricate" something that the government doesn't want them to have, hence my question.

This was a new one on me too. It is pretty much possible to get any size drill you want, between metric and Imperial offerings, in the metalworking world these days. While gun barrels aren't typically made by simple drilling, especially with an off the shelf hardware drill (think length of barrel) how does one think the guns are made if tools to make them aren't available?

 

[RONWEN]

I was wondering if the lack of the 9mm bit had to do with it matching the caliber size.  I was wondering if there was some foreign "regulation" that we weren't aware of because someone may "fabricate" something that the government doesn't want them to have, hence my question.

This was a new one on me too. It is pretty much possible to get any size drill you want, between metric and Imperial offerings, in the metalworking world these days. While gun barrels aren't typically made by simple drilling, especially with an off the shelf hardware drill (think length of barrel) how does one think the guns are made if tools to make them aren't available?

To add to what Greg posted (but not to stray too far from the subject line) -- making a 9mm cal. gun barrel wouldn't typically be done with a 9mm drill, an under size drill would be used followed by a reamer, etc. 
Here is an over simplified illustration:
http://www.wikihow.com/Make-a-Gun-Barrel

 

[Kodi Crescent]

A legitimate gun barrel wouldn't be made with a standard drill bit.  But an illegitimate one?  What about an illegally made suppressor? 

 

[tbellemare]

What happened to the term, "gun drill", meaning a hollow drill with pressurized cutting/cooling fluid down the center to maintain the drill's rigidity?

Tom

 

[greg mann]

What happened to the term, "gun drill", meaning a hollow drill with pressurized cutting/cooling fluid down the center to maintain the drill's rigidity?

Tom

They are still around and used for many things besides gun barrels.

 

[greg mann]

A legitimate gun barrel wouldn't be made with a standard drill bit.  But an illegitimate one?  What about an illegally made suppressor? 

An 'illegitimate' gunmaker would feel pretty comfortable using 23/64. I have never heard of a single cutting tool that was off-limits because it was capable of illegitimate use.

 

[semenza]

Something to realize in this discussion is that there are also 10mm guns available. Certainly not as common as 9mm , but it is not anything rare. It is a current and readily available caliber.

Seth

 

[RONWEN]

What happened to the term, "gun drill", meaning a hollow drill with pressurized cutting/cooling fluid down the center to maintain the drill's rigidity?

Tom

They are still around and used for many things besides gun barrels.

Because "gun" has become a bad word the name has changed to be politically correct -- "deep hole drill"...  [censored]

 

[RONWEN]

Something to realize in this discussion is that there are also 10mm guns available. Certainly not as common as 9mm , but it is not anything rare. It is a current and readily available caliber.

Seth

I own two (2) of each.  [wink]