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Starter Brushes #4690963
03/10/18 11:02 PM
03/10/18 11:02 PM
Joined: Apr 2012
Posts: 19
AZ
junksta Offline OP
junksta  Offline OP

Joined: Apr 2012
Posts: 19
AZ
What type of solder should I use on starter brushes? Searched a lot but either its not mentioned or gets too technical for me. I have 96tin 4silver, 422deg melting point on hand.


2012 Kia Sedona- QSUD
1990 Daihatsu Rocky
Re: Starter Brushes [Re: junksta] #4691021
03/11/18 12:38 AM
03/11/18 12:38 AM
Joined: Dec 2016
Posts: 7,997
Waco, TX
Linctex Offline
Linctex  Offline

Joined: Dec 2016
Posts: 7,997
Waco, TX
Rosin core "electronics" solder.


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Starter Brushes [Re: junksta] #4691022
03/11/18 12:39 AM
03/11/18 12:39 AM
Joined: Dec 2016
Posts: 7,997
Waco, TX
Linctex Offline
Linctex  Offline

Joined: Dec 2016
Posts: 7,997
Waco, TX


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Starter Brushes [Re: junksta] #4691025
03/11/18 12:41 AM
03/11/18 12:41 AM
Joined: Dec 2016
Posts: 7,997
Waco, TX
Linctex Offline
Linctex  Offline

Joined: Dec 2016
Posts: 7,997
Waco, TX


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Starter Brushes [Re: junksta] #4691125
03/11/18 07:43 AM
03/11/18 07:43 AM
Joined: Mar 2004
Posts: 21,813
Upstate NY
Donald Offline
Donald  Offline

Joined: Mar 2004
Posts: 21,813
Upstate NY
You do not want anything plumbing related or brazing or silver solder. Just rosin core solder and use a soldering iron or gun.


2015 Subaru Forester 2.5 engine/CVT
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Re: Starter Brushes [Re: junksta] #4691139
03/11/18 07:55 AM
03/11/18 07:55 AM
Joined: Jan 2012
Posts: 438
hawthorne, Ca.
46Harry Offline
46Harry  Offline

Joined: Jan 2012
Posts: 438
hawthorne, Ca.
Use a solder meant for electronics work which has a rosin core either in the 60/40 or 63/37 formulation. The use of anything else will cause a connection failure in short order. Also make sure that you use a soldering iron or gun with a high enough wattage to completely heat the solder and surrounding metal or you will end up with a cold solder joint which is guaranteed to have an early failure.

Re: Starter Brushes [Re: junksta] #4691144
03/11/18 07:59 AM
03/11/18 07:59 AM
Joined: Dec 2009
Posts: 788
Battle Creek, MI
SVTCobra Offline
SVTCobra  Offline

Joined: Dec 2009
Posts: 788
Battle Creek, MI
I would also suggest buying some rosin flux. Most plumbing flux is acid based (at least what I could find) and even "electrical flux" at big box stores if found is still acid flux. Acid flux causes corrosion and isn't that big of a deal in plumbing but electronics obviously a different story.

https://www.sra-solder.com/rosin-paste-flux-135-in-a-2-oz-jar


Think twice, speak once.
Re: Starter Brushes [Re: SVTCobra] #4691149
03/11/18 08:05 AM
03/11/18 08:05 AM
Joined: Dec 2016
Posts: 7,997
Waco, TX
Linctex Offline
Linctex  Offline

Joined: Dec 2016
Posts: 7,997
Waco, TX
Originally Posted By: junksta
422deg melting point on hand.


That's a tiny bit low, but HEY - if your starter ever sees 421*F you are doing something WRONG!

Originally Posted By: SVTCobra
I would also suggest buying some rosin flux.


Why do suggest this over the (very common) standard of Rosin CORE solder?


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Starter Brushes [Re: junksta] #4691214
03/11/18 09:02 AM
03/11/18 09:02 AM
Joined: Jan 2015
Posts: 972
missouri
ragtoplvr Offline
ragtoplvr  Offline

Joined: Jan 2015
Posts: 972
missouri
dont listen to these folks. They are not in the business.

60 40 will NOT hold up. Not even on alternator brushes.

3.5% usually does not holdup unless the starter is from the 60 or older. Flux must be completely removed after solder. this solder is OK for alternator brushes.

15% silver strip (Phos copper brazing alloy). Flux is not needed and a spot welder is best.

these days everything has been so reduced in size high heat is common.

Someone will be along to say they used it and it was fine. If a rebuilder used that low temp solder the warranties would put them out of the business.

Rod

Last edited by ragtoplvr; 03/11/18 09:05 AM.
Re: Starter Brushes [Re: Linctex] #4691238
03/11/18 09:30 AM
03/11/18 09:30 AM
Joined: Dec 2009
Posts: 788
Battle Creek, MI
SVTCobra Offline
SVTCobra  Offline

Joined: Dec 2009
Posts: 788
Battle Creek, MI
Originally Posted By: Linctex

Originally Posted By: SVTCobra
I would also suggest buying some rosin flux.

Why do suggest this over the (very common) standard of Rosin CORE solder?

Maybe I'm not good at it but the soldering I do I find works better when I use flux first instead of just heating up wires and melt the solder.


Think twice, speak once.
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