The Ford Barn

RockHillWill · 06-23-2011, 04:01 PM

Can some one tell me what the thread size is on a Stewart Warner horn armature ?

I am quite certain that it is left hand treads, but I cannot measure the diameter or threads on the broken one that I have.

I appreciate any information.

BRENT in 10-uh-C · 06-23-2011, 06:12 PM

Will, ...I totally forgot about that I was supposed to send you a couple of horns. If you recall, I told you that I needed you to send me an e-mail to remind me!!

I leave in the morning for San Diego. I can send you a S/W horn or two when I get back if you still need them by then.

.

RockHillWill · 06-23-2011, 06:41 PM

You're right, I forgot as well. I may have to learn to fix this issue. So far, I have heard of over 38 SW horns w/ broken armatures.

Bruce Lancaster · 06-24-2011, 09:46 AM

I believe that MSC industrial sells a range of LH taps and also taps in the odd thread sizes that appear some places on old Fords.

d.j. moordigian · 06-24-2011, 11:01 AM

Bruce,

I believe Will is looking for a die, which MSC should have as well.

Dudley

28 Special Coupe · 06-28-2011, 01:09 PM

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Quote:

Originally Posted by RockHillWill

You're right, I forgot as well. I may have to learn to fix this issue. So far, I have heard of over 38 SW horns w/ broken armatures.

Make it 39! I found out that they were left hand threads after I broke mine.

I had to glue the ratchet wheel on with JB Weld. It worked for a while until the windings started shorting out due to age.

RockHillWill · 06-29-2011, 05:52 AM

This seems to be a prevalent problem, so I guess I better try to figure a way to repair mine. Replacements are VERY hard to find and folks are quite proud of them if they have one.

So far I have identified the threads (thanks Don), acquired a tap and a die, ordered #8-32 left hand threaded rod from McMaster-Carr and have ordered the #27 (.144") tap drill.

I have been able to cut off the broken remains of the original threads and have cut a flat surface and cut in a 'starter drill' and am waiting for the tap drill to get here.

It is my intentions to tap a left hand thread, insert a piece of the threaded rod and loctite it in place.

28 Special Coupe · 06-29-2011, 11:59 AM

Sounds like a great plan. Unfortunately that exceeds my skill set. Please let us know how it turns out.

06-23-2011, 04:01 PM	#1
RockHillWill Senior Member Join Date: May 2010 Location: Rock Hill, S.C. Posts: 985	Stewart Warner Armature Threads Can some one tell me what the thread size is on a Stewart Warner horn armature ? I am quite certain that it is left hand treads, but I cannot measure the diameter or threads on the broken one that I have. I appreciate any information. __________________ Uncle Bud says "too soon old, too late smart!"

06-23-2011, 06:41 PM	#3
RockHillWill Senior Member Join Date: May 2010 Location: Rock Hill, S.C. Posts: 985	Re: Stewart Warner Armature Threads You're right, I forgot as well. I may have to learn to fix this issue. So far, I have heard of over 38 SW horns w/ broken armatures. __________________ Uncle Bud says "too soon old, too late smart!"

06-24-2011, 09:46 AM	#4
Bruce Lancaster Member Emeritus Join Date: May 2010 Location: Madison, NJ Posts: 5,230	Re: Stewart Warner Armature Threads I believe that MSC industrial sells a range of LH taps and also taps in the odd thread sizes that appear some places on old Fords.

06-24-2011, 11:01 AM	#5
d.j. moordigian Senior Member Join Date: May 2010 Location: Fresno, Ca. Posts: 3,636	Re: Stewart Warner Armature Threads Bruce, I believe Will is looking for a die, which MSC should have as well. Dudley

06-29-2011, 05:52 AM	#7
RockHillWill Senior Member Join Date: May 2010 Location: Rock Hill, S.C. Posts: 985	Re: Stewart Warner Armature Threads This seems to be a prevalent problem, so I guess I better try to figure a way to repair mine. Replacements are VERY hard to find and folks are quite proud of them if they have one. So far I have identified the threads (thanks Don), acquired a tap and a die, ordered #8-32 left hand threaded rod from McMaster-Carr and have ordered the #27 (.144") tap drill. I have been able to cut off the broken remains of the original threads and have cut a flat surface and cut in a 'starter drill' and am waiting for the tap drill to get here. It is my intentions to tap a left hand thread, insert a piece of the threaded rod and loctite it in place. __________________ Uncle Bud says "too soon old, too late smart!"

06-23-2011, 06:12 PM	#2
BRENT in 10-uh-C Senior Member Join Date: May 2010 Location: Eastern Tennessee Posts: 12,248	Re: Stewart Warner Armature Threads Will, ...I totally forgot about that I was supposed to send you a couple of horns. If you recall, I told you that I needed you to send me an e-mail to remind me!! I leave in the morning for San Diego. I can send you a S/W horn or two when I get back if you still need them by then. . __________________ . BRENT in 10-uh-C . www.model-a-ford.com ...(...Finally Updated!! ) .

06-29-2011, 11:59 AM	#8
28 Special Coupe Member Join Date: Jun 2010 Location: Broken Arrow, Oklahoma Posts: 63	Re: Stewart Warner Armature Threads Sounds like a great plan. Unfortunately that exceeds my skill set. Please let us know how it turns out.

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