CAD Forum discussion (EN) : Hole Dimension https://www.cadforum.cz/forum_en/ Sun, 14 Jun 2026 09:10:44 +0000 Mon, 15 Apr 2013 12:16:24 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.04 360 https://www.cadforum.cz/forum_en/RSS_post_feed.asp?TID=9131 <![CDATA[CAD Forum discussion (EN)]]> https://www.cadforum.cz/forum_en/forum_images/web_wiz_forums.png https://www.cadforum.cz/forum_en/ <![CDATA[Hole Dimension : Hello N° 3 Kenjg, this is the...]]> https://www.cadforum.cz/forum_en/forum_posts.asp?TID=9131&PID=23288&title=hole-dimension#23288 Author: philippe JOSEPH
Subject: 9131
Posted: 15.Apr.2013 at 12:16

Hello N° 3 Kenjg, this is the table that you should read to adjust the tolerance of your pin to have it stucked in the hole ( or not ).
The table with small letters are for shafts, the table with capital letters are for holes.
Use the system H7 ( hole ) m6 ( pin ) if you want it fixed.
Use an other system for an other fitting ( sliding , etc... )
]]> Mon, 15 Apr 2013 12:16:24 +0000 https://www.cadforum.cz/forum_en/forum_posts.asp?TID=9131&PID=23288&title=hole-dimension#23288 <![CDATA[Hole Dimension : Hello Philippe, Thank you SOO...]]> https://www.cadforum.cz/forum_en/forum_posts.asp?TID=9131&PID=23284&title=hole-dimension#23284 Author: kenjg
Subject: 9131
Posted: 13.Apr.2013 at 16:28

Hello Philippe,

Thank you SOO much.  I didn't know the dims where in MICRONS.  Take care and I'll be back another day.

Best Regards
KenJG
]]> Sat, 13 Apr 2013 16:28:33 +0000 https://www.cadforum.cz/forum_en/forum_posts.asp?TID=9131&PID=23284&title=hole-dimension#23284 <![CDATA[Hole Dimension : Hello Kenjg, I’m coming back...]]> https://www.cadforum.cz/forum_en/forum_posts.asp?TID=9131&PID=23276&title=hole-dimension#23276 Author: philippe JOSEPH
Subject: 9131
Posted: 12.Apr.2013 at 21:32

Hello Kenjg, I’m coming back on your question about tolerances and you will find a table explaining the main fittings.

If it’s too complicated use the “H7 hole system” that is the most used and is based on the normalisation of the dimensions of holes to the tolerance H7 ( holes are much more difficult to machine than shafts ) + shafts to be mounted inside with different tolerances from e7 ( sliding ) to p6 ( assembly with press or thermal expansion ).

Small letters are for shafts and capital letters are for holes.

6 is a very precise work, 7 is medium, 11 is a rough work.

 
principaux ajustements

main fittings

pieces dont le fonctionnement necessite un grand jeu

parts that needa big clearance

dilatation, mauvais alignement, portees tres longues

expansion, bad alignment, very long bearings

cas ordinaire des pieces tournant ou glissant dans une bague

ordinary case of parts sliding in bushing

bon graissage assuré

good lubrication guaranteed

pieces avec guidage precis pour mouvement de faible amplitude

parts with good guidance for low amplitude movements

démontage et remontage possible sans deterioration des pieces

dismantling and reassembly possible without wear of the parts

démontage impossible sans deterioration des pieces

dismantling and reassembly impossible without wear of the parts

 l’emanchement ne peut pas transmettre d’effort

the fitting cannot transmit force

 l’emmanchement peut tranmettre d’effort

the fitting can transmit force

mise en place possible a la main

assembly possible by hand

 mise en place au maillet

assembly with rubber hammer

mise en place a la presse

assembly with press

mise en place a la presse ou par dilatation

assembly with press or with thermal expansion

]]> Fri, 12 Apr 2013 21:32:06 +0000 https://www.cadforum.cz/forum_en/forum_posts.asp?TID=9131&PID=23276&title=hole-dimension#23276 <![CDATA[Hole Dimension : Hello Kenjg, please find here...]]> https://www.cadforum.cz/forum_en/forum_posts.asp?TID=9131&PID=23266&title=hole-dimension#23266 Author: philippe JOSEPH
Subject: 9131
Posted: 12.Apr.2013 at 07:26

Hello Kenjg, please find here some explanations about the tolerances.
H7 is +0 , +...
For a diameter of 1.98 mm it will be +0 , +0.010 mm.
For your diameter of 1.98 that gives :
1.98 + 0 = 1.98 minimum
1.98 + 0.010 = 1.99 maximum.
 
If you do a search in Wikipedia you will find informations but it will talk about the fundamental tolerances IT + the values that you have to had to it etc... Prefer finding some complete tables like the one here under.
Ask for more 
 
 
]]> Fri, 12 Apr 2013 07:26:16 +0000 https://www.cadforum.cz/forum_en/forum_posts.asp?TID=9131&PID=23266&title=hole-dimension#23266 <![CDATA[Hole Dimension : Hello All,I have a general question.I...]]> https://www.cadforum.cz/forum_en/forum_posts.asp?TID=9131&PID=23257&title=hole-dimension#23257 Author: kenjg
Subject: 9131
Posted: 11.Apr.2013 at 22:20

Hello All, 
 
I have a general question.
 
I have a PDF file I'm re-drawing into CAD form and I show a HOLE with the following dims
 
1.98 H7.  The H7 is upward of the dim, not right next to it.  I think it reads a + something and - 0.000
 
I read that the H7 is a tolerance of 0.0025mm.  I've attached the drawing to get my meaning.  I had the part made using this dim and the part (2mm Dowel Pin) slides easily in the hole.  I measured th Pins and they are all 2mm.
 
Thanks in Advance.
 
KenJG

]]> Thu, 11 Apr 2013 22:20:49 +0000 https://www.cadforum.cz/forum_en/forum_posts.asp?TID=9131&PID=23257&title=hole-dimension#23257