Drill Sizes

[alpha1]

Anyone know what drill sizes are a suitable replacement for 10.4mm and 12.1mm.

 

[Eddski]

Are you meaning the imperial equivalent?

 

[alpha1]

Are you meaning the imperial equivalent?

Yes, do you know what the imperial equivalent is? I bought a kit that states the drill sizes as 10.4 and 12.1. I would not even know where to find them two sizes so I was hoping to replace them with an imperial equivalent.

 

[Curly]

10.4mm. HSS DRILL BIT 10.4 MM | Chronos Engineering Supplies

12.1mm. HSS-Co Cobalt Drills 10.0-13.0mm - Arc Euro Trade

Amazon and eBay too.

Pete

 

[Neil]

From memory, those are 27/64 and 15/32. There are many conversion charts available on the internet.

 

[Dalboy]

I find most drill bits will drill slightly oversize anyway so tend not to follow pen manufacturers recommended sizes instead will measure each type of pen tube and work from that.

 

[alpha1]

Thanks guys.

 

[Gert Fitcher]

http://www.hutproducts.com/images/DecimalEq.pdf

 

[monophoto]

I use an iPhone app called 'iEngineer' to obtain information about drilling, threading and related subjects. The imperial version is free, but there is a small charge to get the metric add-on. I don't know if its available for Android phones.

 

[Penpal]

Very few drills come to us as accurate measures as stamped I tend where it matters to take calipers with me or buy sets of drill wgherethe price per drill is really low.Then buy special purpose that same way.

Peter.

 

[wm460]

I think this was the app I had on my android phone.

Drill Bit Charts - Apps on Google Play

 

[alpha1]

Drill sizes annoy me to bits. I use the drill sizes quoted on the kit instructions and lots of times they are nowhere near. I bought the suggested sized drills and not cheap ones. I ended up wrecking two blanks. I gave up on the kits.

 

[Bammer]

Get a set of these, and never have to worry about it again

Set 2 Stainless Steel Drill Gauges metric & Imperial gauge 1/16 -1/2" & 1-13mm | eBay