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small spade lugs

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sportav8r(at)gmail.com
Guest

Posted: Thu Jan 04, 2007 5:23 am Post subject: small spade lugs

Bob: the barrier terminal strip in question has a terminal spacing of

.25" and with the thickness of the plastic dividers between, leaves

.180" width for spade terminals to fit under the screw heads.  I saw

none that small in the DigiKey catalog, and found none that narrow in

my junkbox.  I have an email in to "JD" at Infinity Aerospace, but no

reply so far.  Looks like I may be grinding down my own lugs if I

elect not to just clamp bare wires.  Is there a possible problem with

tinning the tips of the wires with solder, to prevent fraying when

shoving them under the hold-down plates, as far as getting a good,

lasting torque-down of the screws?  I don't want anyting coming loose

under vibration later on.  Something tells me the screws won't "mash

down" as well on solder-dressed stranded wire as they might on the

free strands.



Thanks,



-Bill B.

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nuckollsr(at)cox.net
Guest

Posted: Thu Jan 04, 2007 7:22 am Post subject: small spade lugs

At 08:22 AM 1/4/2007 -0500, you wrote:



 	  Quote: 	
		  



Bob: the barrier terminal strip in question has a terminal spacing of

.25" and with the thickness of the plastic dividers between, leaves

.180" width for spade terminals to fit under the screw heads.  I saw

none that small in the DigiKey catalog, and found none that narrow in

my junkbox.  I have an email in to "JD" at Infinity Aerospace, but no

reply so far.  Looks like I may be grinding down my own lugs if I

elect not to just clamp bare wires.


	


   Please DO NOT clamp screws down on bare wires. It is ALWAYS

   acceptable to file down the sides of a PIDG style ring terminal

   to fit between barriers on a terminal strip.



 	  Quote: 	
		     Is there a possible problem with

tinning the tips of the wires with solder, to prevent fraying when

shoving them under the hold-down plates, as far as getting a good,

lasting torque-down of the screws?  I don't want anyting coming loose

under vibration later on.


	


 	  Quote: 	
		     Something tells me the screws won't "mash

down" as well on solder-dressed stranded wire as they might on the

free strands.


	


    It's a toss-up. If that were my only choice, I'd probably

    tin the strands first. The major problem with terminal strips

    and wires is vibration support just outside the crimped, clamped

    (or soldered) connection. This is the "magic" of the PIDG

    style terminal . . . whether you crimp -or- solder, there

    is a stress concentration in the wire's strands immediately

    where they emerge from the electrical connection. The insulation

    grip immediately adjacent to this stress point prevents future

    failures at that location due to flexing under vibration.



    In articles published by two different authors . . .



http://aeroelectric.com/articles/rules/review.html



http://www.aeroelectric.com/articles/richter/response_1.pdf



    supposedly authoritative individuals hat-dance completely

    around these simple-ideas described in . . .



http://aeroelectric.com/articles/terminal.pdf



    In the 75 or so years since PIDG terminals were developed,

    there have been billions of connections made between wires

    and terminals that have run failure-free simply because the

    designer took time to recognize and accommodate this

    little vulnerability in a wire's termination.



    Bob . . .



      ---------------------------------------------------------

      < What is so wonderful about scientific truth...is that >

      < the authority which determines whether there can be   >

      < debate or not does not reside in some fraternity of   >

      < scientists; nor is it divine. The authority rests     >

      < with experiment.                                      >

      <                            --Lawrence M. Krauss       >

      ---------------------------------------------------------

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Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

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dsvs(at)ca.rr.com
Guest

Posted: Thu Jan 04, 2007 7:46 am Post subject: small spade lugs

Bob,

Allied sells "ferruls" that while not perfect, allow wire termination with support of the insulation in places that ring terminals will not fit.  One down side is the need for still another crimper.  I am suing an engine monitor that had no other good way to terminate the wires. I will report later after some flight time as to weather these "ferrules" work out.  Don  

---- "Robert L. Nuckolls wrote: 

 	  Quote: 	
		   

 

 At 08:22 AM 1/4/2007 -0500, you wrote:

 

 >

 >

 >Bob: the barrier terminal strip in question has a terminal spacing of

 >.25" and with the thickness of the plastic dividers between, leaves

 >.180" width for spade terminals to fit under the screw heads.  I saw

 >none that small in the DigiKey catalog, and found none that narrow in

 >my junkbox.  I have an email in to "JD" at Infinity Aerospace, but no

 >reply so far.  Looks like I may be grinding down my own lugs if I

 >elect not to just clamp bare wires.

 

    Please DO NOT clamp screws down on bare wires. It is ALWAYS

    acceptable to file down the sides of a PIDG style ring terminal

    to fit between barriers on a terminal strip.

 

 >   Is there a possible problem with

 >tinning the tips of the wires with solder, to prevent fraying when

 >shoving them under the hold-down plates, as far as getting a good,

 >lasting torque-down of the screws?  I don't want anyting coming loose

 >under vibration later on.

 

 

 

 >   Something tells me the screws won't "mash

 >down" as well on solder-dressed stranded wire as they might on the

 >free strands.

 

     It's a toss-up. If that were my only choice, I'd probably

     tin the strands first. The major problem with terminal strips

     and wires is vibration support just outside the crimped, clamped

     (or soldered) connection. This is the "magic" of the PIDG

     style terminal . . . whether you crimp -or- solder, there

     is a stress concentration in the wire's strands immediately

     where they emerge from the electrical connection. The insulation

     grip immediately adjacent to this stress point prevents future

     failures at that location due to flexing under vibration.

 

     In articles published by two different authors . . .

 

 http://aeroelectric.com/articles/rules/review.html

 

 http://www.aeroelectric.com/articles/richter/response_1.pdf

 

     supposedly authoritative individuals hat-dance completely

     around these simple-ideas described in . . .

 

 http://aeroelectric.com/articles/terminal.pdf

 

     In the 75 or so years since PIDG terminals were developed,

     there have been billions of connections made between wires

     and terminals that have run failure-free simply because the

     designer took time to recognize and accommodate this

     little vulnerability in a wire's termination.

 

     Bob . . .

 

 

 

       ---------------------------------------------------------

       < What is so wonderful about scientific truth...is that >

       < the authority which determines whether there can be   >

       < debate or not does not reside in some fraternity of   >

       < scientists; nor is it divine. The authority rests     >

       < with experiment.                                      >

       <                            --Lawrence M. Krauss       >

       ---------------------------------------------------------

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

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sportav8r(at)gmail.com
Guest

Posted: Thu Jan 04, 2007 12:03 pm Post subject: small spade lugs

It suddenly dawned on me that I can crimp on a .250" FastOn male

connector and grind down the sides to correct width and slot the

center to straddle the little #4 screw, thus making my own mini-spade

lug.  All the spades I have in my assortment have such wide slots,

there'd be almost no material left after filing the sides down.  I

think this is what I will do.  Thanks for the review of options.



-Bill



On 1/4/07, Robert L. Nuckolls, III <nuckollsr(at)cox.net> wrote:

 	  Quote: 	
		   



 At 08:22 AM 1/4/2007 -0500, you wrote:



 >

 >

 >Bob: the barrier terminal strip in question has a terminal spacing of

 >.25" and with the thickness of the plastic dividers between, leaves

 >.180" width for spade terminals to fit under the screw heads.  I saw

 >none that small in the DigiKey catalog, and found none that narrow in

 >my junkbox.  I have an email in to "JD" at Infinity Aerospace, but no

 >reply so far.  Looks like I may be grinding down my own lugs if I

 >elect not to just clamp bare wires.



    Please DO NOT clamp screws down on bare wires. It is ALWAYS

    acceptable to file down the sides of a PIDG style ring terminal

    to fit between barriers on a terminal strip.



 >   Is there a possible problem with

 >tinning the tips of the wires with solder, to prevent fraying when

 >shoving them under the hold-down plates, as far as getting a good,

 >lasting torque-down of the screws?  I don't want anyting coming loose

 >under vibration later on.



 >   Something tells me the screws won't "mash

 >down" as well on solder-dressed stranded wire as they might on the

 >free strands.



     It's a toss-up. If that were my only choice, I'd probably

     tin the strands first. The major problem with terminal strips

     and wires is vibration support just outside the crimped, clamped

     (or soldered) connection. This is the "magic" of the PIDG

     style terminal . . . whether you crimp -or- solder, there

     is a stress concentration in the wire's strands immediately

     where they emerge from the electrical connection. The insulation

     grip immediately adjacent to this stress point prevents future

     failures at that location due to flexing under vibration.



     In articles published by two different authors . . .



 http://aeroelectric.com/articles/rules/review.html



 http://www.aeroelectric.com/articles/richter/response_1.pdf



     supposedly authoritative individuals hat-dance completely

     around these simple-ideas described in . . .



 http://aeroelectric.com/articles/terminal.pdf



     In the 75 or so years since PIDG terminals were developed,

     there have been billions of connections made between wires

     and terminals that have run failure-free simply because the

     designer took time to recognize and accommodate this

     little vulnerability in a wire's termination.



     Bob . . .



       ---------------------------------------------------------

       < What is so wonderful about scientific truth...is that >

       < the authority which determines whether there can be   >

       < debate or not does not reside in some fraternity of   >

       < scientists; nor is it divine. The authority rests     >

       < with experiment.                                      >

       <                            --Lawrence M. Krauss       >

       ---------------------------------------------------------

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

bakerocb

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

Posted: Fri Jan 05, 2007 8:21 am Post subject: small spade lugs

1/5/2007



Hello Don, You wrote: "I am suing an engine monitor that had

no other good way to terminate the wires."



Would you please identify the manufacturer of this unit to all of us? Just a 

simple statement of who made it and a description of the configuration at 

issue would be helpfull. Thanks.

OC -- The best investment we will ever make is in gathering knowledge.

Time: 07:46:44 AM PST US

From: <dsvs(at)ca.rr.com>

Subject: Re: small spade lugs

Bob,

Allied sells "ferruls" that while not perfect, allow wire termination with 

support

of the insulation in places that ring terminals will not fit.  One down side

is the need for still another crimper.  I am suing an engine monitor that 

had

no other good way to terminate the wires. I will report later after some 

flight

time as to weather these "ferrules" work out.  Don

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

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