Japanese Punch drill

[Texman]

I ordered one of the Japanese punch drills w/bits, and after looking at a recent thread about punching disks for engine cylinders, I got to wondering.

Exactly how large are the punch drills? As most know, I build 1/144 scale
aircraft, and was primarily looking to punch out wheels and tires. I understand the sizes are .5mm, 1.0mm, etc, but visually, how big will this
diameter be? Am I going to be sending this thing back, or will I be alright
for what I need? Even thought of the engine cylinder idea for my scale.

Someone reinforce me! I'm feeling pretty insecure!

Ray

[Ben Gal]

Works great - see my post on the Fokker. Needs a little practice if you are wanting to punch accurately from a printed page.
Punches from 1mm to 5mm - should have lots of possibilities for your scale, more so than 1:33

Keith

[shoki2000]

You should be ok for the cylinders and wheels.
Just in case
1mm = 0.039inch

[Gil]

Texman,

Just use it once and then decide...,

-Gil

[Texman]

Your thread is the exact one I was referencing. I see the pic you posted of the beginning of the cylinders. What size punch is that one?

[SCEtoAux]

Well, one of those round toothpicks like you get out of the dispensers at some restaurants is about 2mm in diameter.

5mm in inches is around .197 which is somewhere between 3/16" and 13/64". If you have a drill bit set it might have some of those sizes so you can get a good visual of what the diameters would look like.

[BARX2]

Originally Posted by Texman

I ordered one of the Japanese punch drills w/bits, and after looking at a recent thread about punching disks for engine cylinders, I got to wondering.

Exactly how large are the punch drills? As most know, I build 1/144 scale
aircraft, and was primarily looking to punch out wheels and tires. I understand the sizes are .5mm, 1.0mm, etc, but visually, how big will this
diameter be? Am I going to be sending this thing back, or will I be alright
for what I need? Even thought of the engine cylinder idea for my scale.

Someone reinforce me! I'm feeling pretty insecure!

Ray

Where'd you get it? I've been trying to locate one, but I don't know the name or web site. Thanks.

[Gil]

BARX2,

I purchased mine from here:

http://talasonline.com

-Gil

[Ben Gal]

Texman - that one is 3mm

[swiftsword]

I've had mixed experiences with a variety of punches. I'm very interested in this tool - specifically because it offers metric bits. I do have these questions, though:

- what do the edges of the cut hole look like? are they turned downward, frayed, uneven in any way?

- what does the cutting look like, is it a good usable disk, or is it frayed, bent or otherwise deformed?

- what's the life of the bits? do they get dull quickly? How do you sharpen them?

Thanks!

Oliver

[hpept]

GRIPE: READ THE FOLLOWING AT YOUR OWN RISK
I'm still wondering why the International System is not adopted worldwide
Texman, forgive me but I didn't understand what your doubt was about until I realized that some unlucky countries are still sticking to Imperial System. If someone is not familiar with metric system, I warmly recommend to start learning about this because this is the standard that hopefully will take place all over the world. Great Britain has already started the conversion, and it was not so painful. Unfortunately, expecially in the industry field, we'll have to deal with mess and confusion for a while...
I can speak about this with awareness because I worked some years dealing with integration of high-tech electro mechanical devices coming from all over the world (America, Europe, Japan) and when it came to put things together it was always a pain in the butt.

[rlwhitt]

I can't comment on longevity, as I've not had mine long. CmdrTed has had his awhile and says they are remaining sharp.

As for the hole and the cutting: The cut line of the hole is perfectly round, smooth, not frayed. The edge of the hole IS turned down a little at the back, moreso for thicker stock than thin. The cutting is likewise perfectly smooth, with not even visible rounding at the back. I use them for parts all the time.

Rick

Originally Posted by swiftsword

I've had mixed experiences with a variety of punches. I'm very interested in this tool - specifically because it offers metric bits. I do have these questions, though:

- what do the edges of the cut hole look like? are they turned downward, frayed, uneven in any way?

- what does the cutting look like, is it a good usable disk, or is it frayed, bent or otherwise deformed?

- what's the life of the bits? do they get dull quickly? How do you sharpen them?

Thanks!

Oliver

[rmks2000]

Rick,

Another question: how easy is it to get the disks out of the drill without deforming them?

[shoki2000]

Didn't have a problem at all with that. Plus, if you keep cutting, they will start coming out on their own

[rlwhitt]

Only for the larger ones, if you poke something small and sharp in there (like a toothpick). As long as you use something nearly as large as the disk, or at least flat on the end, no problem.

Originally Posted by rmks2000

Rick,

Another question: how easy is it to get the disks out of the drill without deforming them?