metric drill bits

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I bought both the metric and standard sets on sale. They are pretty good. I found a couple bits that were not true and had to replace them, but for the price I was still ahead.
 
I picked up a metric set.

I like using brad point bits very much.

However, when they dull I'll prob get a drill doctor and turn them into regular points if it works as other say.
 
Carl Fisher said:
AAAhhhh I wish it wasn't brad point. Oh well.
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I am not quite sold on either brad points or standards twist drills.

I used both on my recent 100 pen order - drilling on a drill press.

I found that the brad point drifts a lot less in blanks where grain orientation was fairly "wild"

and this was using a 10.5 mm bit
 
Correct, the set that I linked is in 0.1mm increments, major help with nibs, holders and the like. precision drilling if you will. the woodcrap link is 0.5mm which offers another field that is also needed. Truth of the matter is having both sets is a good idea.
 
The Penguin said:
Carl Fisher said:
AAAhhhh I wish it wasn't brad point. Oh well.
Click to expand...
I am not quite sold on either brad points or standards twist drills.

I used both on my recent 100 pen order - drilling on a drill press.

I found that the brad point drifts a lot less in blanks where grain orientation was fairly "wild"

and this was using a 10.5 mm bit
Click to expand...

Brad points are great for wood but absolutely terrible for any resin blanks in my opinion. Plus the drill doctor does such a wonderful job with standard twist bits I swore off brad point for good.

That said, I do think brad points do a bit better job with wild grain woods that would normally kick a twist bit to wobble.
 
Carl Fisher said:
Brad points are great for wood but absolutely terrible for any resin blanks in my opinion. Plus the drill doctor does such a wonderful job with standard twist bits I swore off brad point for good. That said, I do think brad points do a bit better job with wild grain woods that would normally kick a twist bit to wobble.
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interesting. I've never had a problem with brad points in any of the acrylic material blanks I've drilled. Did half a dozen today with a brad point with no probs.

Now that I said that I'll have a problem with the next one. :-/
 
What problems do people experience with brad points and acrylics? Not knowing any better, I have been using brad points for everything. Have not had any issues that I would attribute to using a brad point vs a regular twist bit. (Lots of issues I can attribute to the operator on both wood and acrylic. :redface: ) Am I just lucky or am I missing something?

Now watch, the next 5 acrylics blanks I drill with brad points will blow up into a hundred pieces.:eek:
 
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Some things, like ebonite metal etc, does better with non-bradpoints.

The psi link I would have serious reservations about that one. major red flags on that link. Namely 6x bits for $100, that's $16 per bit. 'durable HSS' listing is like saying they are made with a metal rod, tells us very little. The other thing they list 6x bits but only state 7,8,10,10.5 and 12. That is 5 bits not 6, so what is the size of the final bit?

If you are looking in that price range you can net much better deals than that.
 
kovalcik said:
Saw these in the new PSI catalog. Anybody tried them yet?

Acrylic Blank Drill Bit Set (6 drill bits) at Penn State Industries

No pictures on the website yet, but in the catalog they look like a twist drill with a very acute tip angle.
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These bits are made for acrylic/plexiglass. I've bought these for drilling plexi, it's the ticket for that. I don't remember that they were cheap at Meyer plastics either. I've not needed the sizes I have for pens so I can't say how they on resins. Victor Machinery has a set of regular twist up to 13mm for 42ish.
 
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