Metric tool conversion

[rgood]

Guys - I don't have a complete set of Metric tools.

I'm trying to figure out what size Metric socket I need to remove a bolt.

When I measure it with a set of Calipers, I get 1120 or (1100 and 20/1000)

I tried searching on the net for conversion charts with out luck.

Does anyone know what size socket or wrench I need to buy?

Thanks,

 

[MJPetersen]

RGood,

That does not make any sense to me and I live in a country which uses metrics. I am not sure what you are measuring or what standard you are using it is a mystery.

However, that aside I can help you with the conversion. 1in = 25.4 mm and 1 foot = 305 mm or 30.5 cm; other approx wrench sizes are 1/2 = 13 mm; 9/16 = 14 mm; 3/4 = 19 mm; 7/8 = 22 mm. You can figure it from all that.

Mike

 

[TrippleT]

This may help you in your measures:
1/8" 6 mm 8" 200 mm
3/16" 7 mm 10" 250 mm
1/4" 8 mm 12" 300 mm
3/8" 10 mm 14" 350 mm
1/2" 15 mm 16" 400 mm
5/8" 18 mm 18" 450 mm
3/4" 20 mm 20" 500 mm
1" 25 mm 24" 600 mm
1-1/4" 32 mm 28" 700 mm
1-1/2" 40 mm 30" 750 mm
2" 50 mm 32" 800 mm
2-1/2" 65 mm 36" 900 mm
3" 80 mm 40" 1000 mm
3-1/2" 90 mm 44" 1100 mm
4" 100 mm 48" 1200 mm
4-1/2" 115 mm 52" 1300 mm
5" 125 mm 56" 1400 mm
6" 150 mm 60" 1500 mm
You will have to separate one side from the other here the way it came out.

 

[Tig]

You need to get a cheap caliper set with both metric and imperial measurements on it. Plastics calipers can be found for a buck.

 

[TrippleT]

For those who might be interested there is a little program here to convert to metric, that is free.

MrHVAC.com Introducing Conversion Plus! - It's Free

 

[Mickey_Fx]

One of the best util prgm you could ask for for almost any kind of measurement conversion is Josh Madison's convert prgm. It's free and I wouldn't have a computer without it.

Convert @ joshmadison.com

 

[diyDave]

If you turn the 12" adjustable Wrench over, it says 300 mm on the other side!

 

[pycoed]

Guys - I don't have a complete set of Metric tools.

I'm trying to figure out what size Metric socket I need to remove a bolt.

When I measure it with a set of Calipers, I get 1120 or (1100 and 20/1000)

I tried searching on the net for conversion charts with out luck.

Does anyone know what size socket or wrench I need to buy?

Thanks,

1.120 inches is 28.45mm so it sounds like you need to get a 28mm socket?

 

[3RRL]

You could use a 1-1/8" socket for that. 1.120" is only .005" less than 1-1/8" which is about normal for that size.
If you get a 28mm socket (1.102") it will be .018" too small, or 1/2mm small IMHO.

 

[MJPetersen]

1/8" 6 mm 8" 200 mm
( 3/16" 7 mm 10" 250 mm
( 1/4" 8 mm 12" 300 mm
3/8" 10 mm 14" 350 mm
1/2" 15 mm 16" 400 mm
5/8" 18 mm 18" 450 mm
3/4" 20 mm 20" 500 mm
1" 25 mm 24" 600 mm
1-1/4" 32 mm 28" 700 mm
1-1/2" 40 mm 30" 750 mm
2" 50 mm 32" 800 mm
2-1/2" 65 mm 36" 900 mm
3" 80 mm 40" 1000 mm
3-1/2" 90 mm 44" 1100 mm
4" 100 mm 48" 1200 mm
4-1/2" 115 mm 52" 1300 mm
5" 125 mm 56" 1400 mm
6" 150 mm 60" 1500 mm
You will have to separate one side from the other here the way it came out.

I would not want someone to be mislead by this table. It is not correct. I often use 1/2 in wrench for a 13mm nut and 19 mm is very easily worked with a 3/4 in. The problem is the rounding off of standards has resulted in errors in the extrapolated measurements. 1 inch is 25.4 mm and 12 inches is 305 mm. Those are close for making estimates.

I had a mental block and could not see that that only the "." was missing and I should have read 1.120. Opps. I will blame the late hour for my error.

3RRL is right in that a 1 1/8 in socket will work well.

Mike

 

[rgood]

You guys are correct - I found out and tested a 1 1/8 socket late this afternoon.

However, how is it that a 1 1/8" socket works on a Japanese Yanmar tractor. Before I took the measurement and tried the 1 1/8" socket, I bought every metric socket the store had and none of them seemed to work, unless I missed one - I was buying and then returning them as they were not cheap and I only wanted the one that fit.

 

[3RRL]

Beats me?

 

[MJPetersen]

RGood,
What part is this "bolt" on. Where is it? Could it have been changed to US equiv by a previous owner?

As Rob pointed out the 28 mm would be too small. So the closest that would work is 29mm and, since Crafstman sells such a beast, it must be used at least occasionally. 29mm actually works out to be 1.142, which is a bit sloppier than the 1 1/8, but would work.

Mike

 

[RoyJackson]

English to metric, multiply the English measurement by 25.4
Metric to English, multiply the measurement by .03937

Convert fractions to decimal, divide the top number by the bottom (3/4 = .750, for example)

Using English sockets on a metric bolt can result in rounding off the bolt or nut. Very few English fit the metric fastener snugly (same thing applies going the other way) so use good judgment when using sockets that aren't exactly the correct size...especially when torquing.

 

[scott_vt]

You could use a 1-1/8" socket for that. 1.120" is only .005" less than 1-1/8" which is about normal for that size.
If you get a 28mm socket (1.102") it will be .018" too small, or 1/2mm small IMHO.

Mornin Rob,
Gee its amazing how toolmakers think alike ! I thought the exact same thing reading the first post and then scrolled down to your reply !

Oh BTW, thanks for the Halloween joke, the modelshop thanks you also !!!

 

[mrutkaus]

So...try putting the sockets on the bolt or nut?

 

[3RRL]

Scotty,
I was thinking that size 1.120" is a standard hex head for a 1-1/8" socket. Tool makers rule! Hahaha

Glad you like the Halloween wake up call. It got me and scared the bejezus out of me.

 

[rgood]

MJ, the 29 mm probably would work - However the place I was buying the sockets at had a 27mm and then it jumped to 30mm - So, I didn't know what was up with that - But I believe you when you say there's a 29.

I need to just buy a complete set

Thanks for your help.

 

[MJPetersen]

The problem in the metric wrench department is that there is a variety of head sizes for a "standard" bolt size. A 6 mm bolt "normally" has a 10 mm head, the next standard size is 8 mm which normally has a 13 mm head, but every set of metric sockets will include an 11mm and 12 mm because there are non-standard bolt sizes, and head sizes vary also within a given bolt size.

I recently bought bolts of 22 mm (7/8) to use as 3 pt pins. While they are non-standard, they are available. The standard is 20 mm and then 24mm.

I believe this kind of thing used to be the case in the US. My first socket sets always included a 19/32, which I never used and would often grab thinking I had a 5/8. I would look when it did not fit. I do not believe I ever did use those sockets. Maybe 3RRL could enlighten us on that.

For your situation, since 1 1/8 works I would not worry about a 29 mm. What for?

Mike

Mike

 

[TrippleT]

When I posted I cut and pasted the chart and did not study it close enough. And, the little program that Mickey FX, suggested is a good little program with more information than the one I suggested. It has conversions for newton meters that torque conversions need for todays engines etc.
In addition, the chart was from a pipe chart. I saw at least one commonly used size on there that was not correct. SO, check before buying the whole thing. Sorry if anyone was mislead by that. In the future I will double check the thing. You can get a set of metric at Wal Mart if your just going to be a casual user. Made by Stanley
I have one set of those and have not had any problems with them. I would probably want Snap On, or something equivalent, if I were going to make a living with them.