Michael, You need to look at a tolerance stack-up. What is going into the tooling holes, what is the tolerance of those features (size and distance), and what is the size tolerance of the tooling hole itself? Take a look at ASME Y14.5M-1994. Ben -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Kuczynski, Michael (H USA) Sent: Wednesday, April 04, 2012 7:16 PM To: [log in to unmask] Subject: EXTERNAL: [TN] Tooling hole tolerance All - I'm looking for supporting documentation for; the typical tooling hole to tooling hole tolerance. I've gone thru IPC-222, 2615, 610 and even defunct D-275 with no luck. Typically I specify +/- 0.003in (or 0.076mm) and sometimes +/-0.002in Any help would be appreciated. SIEMENS Michael Kuczynski Healthcare Diagnostics Inc. Product Eng. II CID 511 Benedict Ave. 914-524-3118 (Ph) Tarrytown, NY 10591 914-524-3322 (Fax) Mail Stop P25-1-C [log in to unmask] ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________