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The Break Room (Non-Technical Discussions)

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firemandan9
Posts: 23
Registered: ‎03-17-2007
Message 1 of 8 (727 Views)

For metric dimensioning of holes what would N°8 M12X1D mean?

727 Views, 7 Replies
01-30-2013 07:26 PM

For metric dimensioning of holes what would N°8 M12X1D mean? Sorry that I am not really sure where this would go, a guide to metric hole dimensioning standards would be great. 

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Charles_Shade
Posts: 8,196
Registered: ‎04-10-2005
Message 2 of 8 (705 Views)

Re: For metric dimensioning of holes what would N°8 M12X1D mean?

01-31-2013 05:01 AM in reply to: firemandan9

What's your AutoCAD platform?

 

Regards, Charles Shade            Win8 FAQ
CSHADEDESIGN|AUTOCAD LT|LT-KB|DYNAMIC BLOCKS

 
Please mark Accept as Solution if your question is answered. Kudos gladly accepted.
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troma
Posts: 2,519
Registered: ‎05-21-2008
Message 3 of 8 (698 Views)

Re: For metric dimensioning of holes what would N°8 M12X1D mean?

01-31-2013 05:46 AM in reply to: firemandan9

I believe an M12 thread is a bolt with an outside diameter of 12mm.  So the question logically arises: are you drilling a hole to tap a thread for this bolt, or a hole that it can pass through without hitting the edges?

 

My gut feeling is that you will get the best answer if you ask the person who gave you this spec.

 

Do any of these help:

 

http://www.efunda.com/DesignStandards/screws/screwm_coarse.cfm

http://www.efunda.com/DesignStandards/screws/screwm_fine.cfm

http://www.metrication.com/engineering/threads.htm

http://en.wikipedia.org/wiki/Metric_thread

 

I think the 1D part refers to the hole being the depth of 1 diameter.

http://www.engineeringsupplies.co.uk/metric-fine-helicoil-insert-pack-1000-p-7453.html


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Charles_Shade
Posts: 8,196
Registered: ‎04-10-2005
Message 4 of 8 (690 Views)

Re: For metric dimensioning of holes what would N°8 M12X1D mean?

01-31-2013 06:22 AM in reply to: troma

I wonder if the N 8 is the grade of the bolt/screw?

 

Your answer is one of the thouroughly researched and complete ones that needs a Kudos.

Regards, Charles Shade            Win8 FAQ
CSHADEDESIGN|AUTOCAD LT|LT-KB|DYNAMIC BLOCKS

 
Please mark Accept as Solution if your question is answered. Kudos gladly accepted.
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troma
Posts: 2,519
Registered: ‎05-21-2008
Message 5 of 8 (650 Views)

Re: For metric dimensioning of holes what would N°8 M12X1D mean?

02-04-2013 01:07 PM in reply to: Charles_Shade

Thanks Charles, but with Google to hand it doesn't take much to find a few interesting sites!

 

By the way, on the subject of Kudos, your signature line is a little incongruous on this forum! :smileylol:

(mine too, I guess)


Credit where credit is due! Give kudos or accept as solution whenever you can.

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Charles_Shade
Posts: 8,196
Registered: ‎04-10-2005
Message 6 of 8 (633 Views)

Re: For metric dimensioning of holes what would N°8 M12X1D mean?

02-05-2013 04:36 AM in reply to: troma

Should we ask for an alternative signature for non-Kudos Forums?

 

You are absolutely right about Google making things easy but you took the time to look and find those sites when the OP did not do so. They looked for the easy answer; hopefully finding it here, and found out that they needed to do some research for themselves. A good local hardware store may have been an answer for them too.

Regards, Charles Shade            Win8 FAQ
CSHADEDESIGN|AUTOCAD LT|LT-KB|DYNAMIC BLOCKS

 
Please mark Accept as Solution if your question is answered. Kudos gladly accepted.
Active Contributor
Rory_M
Posts: 59
Registered: ‎04-14-2011
Message 7 of 8 (551 Views)

Re: For metric dimensioning of holes what would N°8 M12X1D mean?

02-20-2013 06:26 AM in reply to: firemandan9

It is a little confusing, and usually you would say M10 x 15 (as an example for a hole that is a 10mm metric thread by 15mm deep)

The x1D bit is odd, maybe it's a typo or dodgy old drawing that's hard to read

 

I don't suppose it actually says No8 M12x10 does it? If it did it would mean:

 

No8 is the quantity - 8 off holes

M12 is the thread - M12 thread (standard is 12mm diameter by 1.75mm pitch)

x10 Would usually be depth after the thread size, so 10mm deep

 

Hope this is useful.

 

Rory

 

 

 

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troma
Posts: 2,519
Registered: ‎05-21-2008
Message 8 of 8 (541 Views)

Re: For metric dimensioning of holes what would N°8 M12X1D mean?

02-20-2013 07:45 AM in reply to: Rory_M

Rory, the link I posted earlier show the D referes to the diameter.

So the depth of the hole is equal to the diameter.


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