[GreenKeys] Model 15 casting repairs (JB Weld?)

[Scott Johnson]

I would suspect those rods were nickel, not magnesium.  Magnesium rods would
simply burn.  Nickel is the standard filler metal for cast iron and steel,
it alloys easily and is more ductile than the cast iron, so it will not
cause further cracking.  

 

Scott V. Johnson W7SVJ

5111 E. Sharon Dr.

Scottsdale, AZ 85254-3636

H (602) 953-5779

C (480) 550-2358

scottjohnson1 at cox.net <mailto:scottjohnson1 at cox.net> 

scott.johnson at ieee.org <mailto:scott.johnson at ieee.org> 

 

From: greenkeys-bounces at mailman.qth.net
[mailto:greenkeys-bounces at mailman.qth.net] On Behalf Of Nick
Sent: Thursday, June 1, 2017 6:27 AM
To: GreenKeys at mailman.qth.net
Subject: Re: [GreenKeys] Model 15 casting repairs (JB Weld?)

 

To me, JB Weld is nothing else than a strong adhesive - good for a temporary
and cosmetic fix.

 

Any cast metal can be welded with the right material and a very experienced
welder will get the job done no matter how difficult the task will be. The
downside is he will charge a minimum of  $100-150 an hour - no matter how
short that hour is.

 

Long time ago I had an antique cast iron kitchen stove with a broken corner.
The guy used some special magnesium rods and did a fantastic job - almost
invisible. The welding scar was only 5 inches long and my wallet was  $100
lighter. 

 

Nick  -  N0NCQ 

 

 

 

Sent from my T-Mobile 4G LTE Device

-------- Original message --------
From: Kenneth Gartland <trnsrme at gmail.com <mailto:trnsrme at gmail.com> > 
Date: 6/1/17 9:04 AM (GMT-05:00) 
To: greenkeys <GreenKeys at mailman.qth.net <mailto:GreenKeys at mailman.qth.net>
> 
Subject: [GreenKeys] Model 15 casting repairs (JB Weld?) 

Hi all! 

 

As mentioned in an earlier posting, it is really

sad when a base or frame fracture/breakage

happens to our treasured machines...

 

I had an almost mint condition M26 base broken

completely in half, despite the shipper ensuring

the machine had been very carefully packed...

 

It had been quite obvious, the carton had been dropped

from a height on its' bottom edge to inflict such

damage...

 

More to the point, shipping damage is by far, the main

cause of damage to equipment...

 

Back to the topic of "JB Weld"...

 

I had considered trying to repair my fractured base

on the M26, but wasn't sure if it cud handle the

stress and operational vibration etc...

 

Another problem is the base casting is so thin,

I don't. think it can be welded...

 

I am going to have to re-visit, and re-think the problem...

 

It wud be nice to hear from list members of their

experiences with JB good and bad...

 

Perhaps now with advances in metal epoxy products,

a better solution may be available

 

When I worked in the Teletype shop many years ago,

I had encountered several Model 15 typing unit 

frames, (Legs) that had been successfully welded...

 

What say you all?

 

Cheers!

 

Ken

VE3-HMQ

i-Telex 6163

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