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D-subminiature Connectors

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bakerocb

Joined: 15 Jan 2006
Posts: 727
Location: FAIRFAX VA

Posted: Sat Oct 30, 2010 4:16 am Post subject: D-subminiature Connectors

10/30/2010



Hello Fergus, You wrote: "..... how to replace the usual jack screws on 

D-sub connector shells ..."



You could try this solution -- see posting copied below:



=======================================================

From:  <bakerocb(at)cox.net> Subject:  D-subminiature Connectors Date: 

5/29/2010



Hello Fellow Builders, Here is what we are writing about:



http://en.wikipedia.org/wiki/D-subminiature



Bob Nuckolls writes: "It's a fact that the majority of d-sub connectors come

with

    short, slotted-head 4-40 jack screws that are EXCEEDINGLY

    difficult to work with in confined spaces traversed by wire

    bundles." ..and ... "the inconvenience of stock, slot-head jack-screws."



{RESPONSE}  He offers a screw handling solution here:



http://tinyurl.com/34nrdd5



I'd like to offer another solution -- use #4-40 machine screws with hex

socket (Allen wrench) drive heads. The hex socket drive head allows one to

manuever the small screws in a manner vastly superior to a straight slot or

phillips drive head screw.



See here for a source of such screws:



http://www.microfasteners.com/catalog/products/SSC.cfm



Here is just one source of tools for handling these screws:



http://www.bondhus.com/



Conventional Allen wrenches work fine for most handling of these screws, but

these Prohold tools will give even more control if needed:



http://www.bondhus.com/features/prohold/body-0.htm



'OC' Says: "The best investment we can make is the effort to gather and

understand knowledge."



PS: An aerospace vehicle with hex socket or Torx / six lobe / star drive

fasteners is much easier to work on than a vehicle with straight slot or

Phillips drive fasteners. See here for some handy tool kits to work with the

hex socket or Torx / six lobe / star drive fasteners:



http://www.chapmanmfg.com/



=======================================================



Time: 09:27:36 AM PST USFrom: Fergus Kyle <VE3LVO(at)rac.ca>Subject: 

an aeroelectric connection article Cheers,

 I recall a recent article by Bob which showed how to replace the

usual jack screws on D-sub connector shells with modified 4-40 hardware

threaded rod (?) and 4-40 hex standoffs. I can't find it but it would answer

most of my D-Sub concerns behind the instrument panel.

 Any suggestions as to source amiably respected.......

Ferg

VE3LVO(at)rac.ca

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bakerocb

Joined: 15 Jan 2006
Posts: 727
Location: FAIRFAX VA

Posted: Sat Oct 30, 2010 6:38 pm Post subject: D-subminiature Connectors

10/30/2010



Hello Fergus, Got the picture. Here is a solution. Go to the Chapman Mfg Co 

web site:



http://www.chapmanmfg.com/



On that web site you will find that one of their tools is a very clever, 

short swing ratchet. Specifically this tool here:



http://www.chapmanmfg.com/aboutourtools.html



This ratchet is used by putting one of the hex drive adapters into the 

ratchet. If the adapter is put into the ratchet from one side the ratchet 

will rotate the adapter clockwise (in). If the adapter is put into the 

ratchet from the other side the ratchet will rotate the adapter 

counterclockwise (out).



You can start the hex socket drive 4-40 machine screw either by hand or by 

using the adapter as a handle for the machine screw. Once the screw is 

started, and there is enough friction to permit the ratchet to function as a 

ratchet, you can put the adapter into the ratchet, feel the adapter into the 

screw head socket, and ratchet away to tighten the machine screw.



Chapman standard kit # 4320 should get you started, but you might want to 

look over some of the other kits available as well. I keep one Chapman kit 

in the hangar and one Chapman kit in my pickup truck. I need to handle both 

hex socket drive machine screws and Torx drive machine screws.



'OC' Baker Says: "The best investment we can make is the time and effort to 

gather and understand knowledge."



PS: I keep one of these kits with me in my airplane at all times -- you may 

prefer one of them to the Chapman kits:



http://www.newmantools.com/wfmc.htm



===============================================

---

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