Litz wire is insulated. Each 44 AWG wire is insulated with a thin film coating. The best way to terminate it is solder. The solder removes the film and you obtain a really good connection. -----Original Message----- From: TechNet [mailto:[log in to unmask]]On Behalf Of Paul Edwards Sent: Monday, April 06, 2009 2:37 PM To: [log in to unmask] Subject: Re: [TN] Wire Crimps: Machine Vs Hand Tool Specs Sounds to me like you have a litz-type wire which would have a slightly lower effective yield diameter than the equivalent AWG wire when the connector is crimped to it... I have found successful wire crimps are more a function of pressure then die height setting... Once the wire strands plastically deform you are done. So a manual crimp allows the operator to feel the force and compensate for different materials and process parameters... Current crimping machines are designed to supply a max. force and rely on die height settings to control the crimp... I would recommend you take the height data from the manual crimps you made and set up the machine to obtain that setting then experimentally verify optimum die setting for the pull strength around it... Paul Paul Edwards Surface Art Engineering -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Forrester, Michael (H USA) Sent: Monday, April 06, 2009 9:05 AM To: [log in to unmask] Subject: [TN] Wire Crimps: Machine Vs Hand Tool Specs We have an application that uses a tyco 350550-2 crimped on connector. It is being crimped onto a 14AWG wire made up of 1050 strands of 44 AWG wire. The wire has a nom. wall of .015" and an nom OD of .115". The standard pull test calls out for min 50 lbs. If we crimp it in automated machines per spec to .069" crimp height, we fail the pull test at an avg of 47 lbs. If we hand crimp it to spec at .063", we get a pull strength avg of 55 lbs., which passes. Due to the volume, the automated machine process is preferred. I have two questions: 1) Why are the automated and hand tool crimp height specifications different? 2)Is there an issue with just setting up the automated tool to the hand tool crimp height specifications? Thank you. Best Regards, Michael Forrester Sr. Product Engineer Siemens Healthcare Diagnostics 101 Silvermine Rd. Brookfield, CT 06804 PH: (203) 740-6452 The attachment named could not be scanned for viruses because it is a password protected file. ---------------------------------------------------------------------------- This message and any included attachments are from Siemens Medical Solutions and are intended only for the addressee(s). The information contained herein may include trade secrets or privileged or otherwise confidential information. Unauthorized review, forwarding, printing, copying, distributing, or using such information is strictly prohibited and may be unlawful. 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