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numpty measurements
dilley - 30/8/06 at 09:54 PM

ok dont laugh but how many thou to a mm.

StevenB - 30/8/06 at 09:57 PM

if memory serves its 39.37

1000 / 25.4

s

Humbug - 30/8/06 at 09:58 PM

1 inch = 1000 thou
1 inch = 25.4 mm

so there are 1000/25.4 = 39.37 thou to 1 mm

(I think?)

jon_boy - 30/8/06 at 09:58 PM

Given roughly 25mm to one inch 1000/25 is 40 thou to one mm. which is rough and could be wrong. Jon

Beaten to it


[Edited on 30/8/06 by jon_boy]

ian furness - 30/8/06 at 09:59 PM

1 DIVIDED BY 25.4=0.0393

dilley - 30/8/06 at 10:03 PM

got adrill bit with 37 stamped on it is this 37 thou?? I need to increase it but I only have a 3mm bit which not being an engineer doesnt seem much bigger.

Chippy - 30/8/06 at 10:21 PM

Well IF your drill is 37 thou, and I would guess that it is, it is just about 1mm, so your 3mm drill is three times as thick. Ray

flange nut - 30/8/06 at 10:32 PM

It's probably a number 37 drill which is .104 of an inch in diameter.

Thats 104/39.4 = 2.64mm

Geoff

[Edited on 30/8/06 by flange nut]

MikeRJ - 30/8/06 at 10:45 PM

quote:
Originally posted by flange nut
It's probably a number 37 drill which is .104 of an inch in diameter.

Geoff


Which is 2.64mm, so it would look quite simmilar to a 3mm bit.

dilley - 31/8/06 at 07:41 AM

I assume that it is a 16 thou increasement??

MikeRJ - 31/8/06 at 02:49 PM

It's actualy 14.11 thou difference.

3mm * 39.37 = 118.11

118.11 - 104 = 14.11