Driil Bits Question

[Whiterook]

Hi All! Question for those in the know concerning drill bits used in model kit building:

I have a model I'm going to be starting soon. It requires a couple holes be drilled. The instructions designate numbers I'm not familiar with, and I was hoping you could "educate" me. The designations have a O with an angle slash (/) through it, followed by 1,2 mm and 0,1 mm.

I was looking through Model Expo - Historic Wooden Ship Kits, Airplanes, Hobby Tools, Shipmodeling Books And More at their twist drill sets, and saw a metric drill set with sizes such as 1.5, 2.0, 2.5, etc,; and sets that designate by "sizes", such as #61-80.

This has me all kinds of confused. In the end, I can at the very least, figure out what the actual part is that is to be connected, match up the locating pins to a drill size, and presto-chango; but I'd rather know what the actual size designation is the kit in question.

Any ideas?

[McCoy]

You sure 'bout Ø 0.1mm? That's quite thin n' my smallest is Ø 0.3mm.

[Wolster]

The 'Ø' is just the symbol for diameter. 1mm is very small, I normally just use a pointed scalpel blade depending on the thicknes of the plastic.

[Geek44]

Sorry I couldn't be more helpful Whiterook.
Peace.

[Whiterook]

Originally Posted by McCoy

You sure 'bout Ø 0.1mm? That's quite thin n' my smallest is Ø 0.3mm.

Hi!

McCoy -- It's not o.1, it's listed as 0,1

A coma, not a decimal point. This what part of the confusion to me; are they saying either a 1 mm or 2 mm hole can be drilled? That's a bit of a difference in itself (no pun intended).

Wolster -- Thanks Mate. I was fairly certain the o with a / through it meant diameter. Been a long time since my drafting days!

Geek44 -- Not a problem, Mate. I appreciate you reading through my long blatherings!

A lot of this stuff is either new to me (to the high degree the model building game has advanced), or drastically different than how I 'used" to do it.....so, I try not to

[Freightshaker]

Never worried much about the sizes called for in instructions. I just matched up the bit with the alignment peg like you would with a bolt and a drill bit. If you're too big, that's what they make Zap-Gap for!!

[Whiterook]

Wise words, FS! I'm not too concerned about it, but was curious about what the designations mean. It doesn't help that their metric either, which you might as well be showing us Yanks Eygptian Hieroglyph's!!!

[Geek44]

There's a protocol used in Europe where the comma stands in place of the decimal point. Thus 0,1 means 0.1. Freight has supplied the best answer I think.

[Whiterook]

Geek44......you 'da man! Now that answered the biggest question for me! I thought maybe it was a different way to annotate it...decimal/comma being the same thing. It makes more sense than, het Mate, just pick 1 mm or 2 mm, whichever suits your mood at the moment! Thanks Mate!

And yes, Freights method was the one I was palnning to use anyway, as I've quickly learned (eben from my short run of build lately) that trusting the instructions for knowing what they're actually talking about is not the course of the wise Grasshopper.

[Geek44]

As I said...those Roden kits require work.