Have you reminded yourself of FAQ731-376: Forum Policies recently, or taken a look at RE: basic dimensioning of holes, c'bores & c'sinks per ISO standard ctopher (Mechanical) 14 Oct 08 15:08 Sorry if the above doesn't really answer you, turns out that maybe it's a very good question. May be relevant but I'm not sure if they're specifying the tool rather than the feature. Http ://so_catalog ue/catalog ue_tc/cata logue_deta il.htm?csn umber=9993 Http: //org/iso/is o_catalogu e/catalogu e_tc/catal ogue_detai l.htm?csnu mber=37365 shows you what the ASME symbols for these are. The table in ASME Y14.5M where it compares ISO & ASME standards indicates that the csk, cbore & depth symbols are only proposed for ISO, I don't know if they've been accepted in the 14 years since 14.5 was last updated. co.uk/Usef ul_Tables/ Drawing/Dr awing.html is a pretty good ISO info source but I don't' see much detail on countersinks. (British Standards invoke ISO) & thread1103-214348: International Drawing Standard for New Global Org. Thread1103-130938: Countersink/bore, chamfer and spotface annotation. Take a look at the FAQ section especially FAQ1103-1044: ISO Standards Handbook - Technical drawings I used to work ISO but didn't know it as well as I now know ASME. Most users on this forum are working to ASME but some do have familiarity with ISO. RE: basic dimensioning of holes, c'bores & c'sinks per ISO standard I have more questions but I will ask them later in the thread if I get some good feedback. Does anyone know what ISO standard defines how to dimension counterbores and countersinks? From what I can tell, this method will not be recognized universally by all people using ISO standards. However, I noticed that that is to DIN 6780 which is not an ISO standard. For example, you could call out a countersink by putting this at the end of a leader which points to the countersink, "Ø10x14U", where 10 is the diameter of the hole and 14 is the depth. In the Technical Drawing section of the Lehrmittle Europa Technical Book Series Mechanical and Metal Trades Handbook (the book that the German company that owns us and requires us to draw to ISO standards gave us to use as a guideline) has an abbreviated way of calling out countersinks. Another book I purchased, Paul Green's Mechanical Engineering Drawing Desk Reference Creating and Understanding ISO Standard Technical Drawings does not use symbols or truncated words but dimensions the diameter of the counterbore and depth and separately dimensions the hole. In Simmons & Maguire's book Manual of Engineering Drawing to British and International Standards they still use the truncated words C'Bore and C'SK. ANSI has shifted to symbols for this and what I understood is that ANSI was shifting to symbols to be more like the ISO standard so that eventually one day the standards for technical drawing will be identical. I would like to know the standard you reference for this.Ī second situation is that of counterbores and countersinks. Do you call out the hole and the bolt circle diameter separately or can you call it out all in one note. One situation I have is holes on a bolt circle. Therefore, I need to buy the standards to see for myself. I have bought a couple books on ISO drawing and have gotten conflicting information. I am asking for guidance on the ones I will use. What standard do you use? Granted I could purchase the, "ISO Standards Handbook - Technical drawings" but it is expensive and has standards I will not use and do not need. I am new to ISO drawing and have a question on dimensioning holes.
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