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Old Mechanical Speed Controller. - 12/14/2012 5:20 PM   
SteveR3750


 

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Status: offline 		I am trying to clean up a Tamiya SuperShot that I bought from a co-worker. It is all original, and I have opted to keep it as close to original as possible so I will be keeping the old Mechanical Speed Controller.

At this point I have everything stripped down, torn apart, cleaned up, and have started the re-assembly.

I am wondering what I might be able to use to lubricate the Mechanical Speed Controller?

Would Vaseline be a substitute for the old Tamiya Switch Lubricant?

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RE: Old Mechanical Speed Controller. - 12/14/2012 6:18 PM   
Foxy



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Status: offline 		I'm gonna stick my neck out here and say that I think (emphasis on think) you want a dielectric grease. I assume any good one from an auto or hardware store will do. Vaseline has none of the desired properties of switch grease.

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RE: Old Mechanical Speed Controller. - 12/14/2012 7:42 PM   
SteveR3750


 

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Status: offline 		Thanks Foxy.... I thought the same thing. I tried to do some re-search on the internet and from the few things that I did find it seems that dielectric grease is an insulator with the main purpose being to prevent moisture and corrosion. If I understood what I read correctly, it is the exact opposite of the type of grease needed for this situation. I always thought grease was grease, but I guess not.

The old Tamiya Switch Lubricant is actually a "conductive" type grease ( taking conductive lightly) and apparently promotes smooth flow of electricity between the contacts on the old MSC's preventing arcing. etc...

They do sell such a grease, but I cant seem to find any locally in the small amount that I require. It must be ordered so I was looking for a quick substitute.

http://www.radioshack.com/product/index.jsp?productId=12729883

http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXGS05

I read during my re-search of people using Vaseline on certain electrical type switches, but wanted to check here before trying it so see if anyone else had used it, or could tell me what they do use..

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RE: Old Mechanical Speed Controller. - 12/14/2012 8:32 PM   
CK1



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Status: offline 		Go to your nearest Auto dealer and check with the parts dept or the guys in the shop . Dielectric grease is used for wiring repairs and sealing bulb sockets .



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RE: Old Mechanical Speed Controller. - 12/15/2012 11:28 AM   
Foxy



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quote:

ORIGINAL: SteveR3750

The old Tamiya Switch Lubricant is actually a ''conductive'' type grease ( taking conductive lightly) and apparently promotes smooth flow of electricity between the contacts on the old MSC's preventing arcing. etc...


I would need to read what you have read to be convinced of that. Lots of current going through those contacts, if the grease conducts even a little bit you'll get cross talk between the contacts and MASSES of heat. Check your sources again. I'm not saying you're wrong, you may be right, but I'd want to be 100% sure before putting conductive grease on something which is gonna see 30-40amps.

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RE: Old Mechanical Speed Controller. - 12/15/2012 12:53 PM   
phmaximus



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Status: offline 		I thought the Tamiya switch lube was to prevent sparks so the contacts don't get arch marks

Why not use the Tamiya switch lube 87023 it's only $10 a tube?

Hey can't find the part number, But there was a optional dust boot for the MEC. It might keep is going for more years yet...

Good luck


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RE: Old Mechanical Speed Controller. - 12/15/2012 1:21 PM   
nitrosportsandrunner



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Status: offline 		Or you could just buy a bunch of used MSC's. I have at least 1-2 kicking around I will never use.
I started in the hobby when ESC's were the norm. The 1st time I drove a tamiya with a MSC I was like "this sucks". You cant brake without it going into reverse...which usually make the model spin out.
Nothing wrong with keeping your model original...but I cant stand MSC's myself.

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RE: Old Mechanical Speed Controller. - 12/15/2012 2:45 PM   
The Mad Modder



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quote:

ORIGINAL: CK1

Go to your nearest Auto dealer and check with the parts dept or the guys in the shop . Dielectric grease is used for wiring repairs and sealing bulb sockets .


+1
I would use dielectric grease for the reasons Foxy stated. A auto parts store would be a good place to look for dielectric grease, you may even be able to get a small packet of it for about $1.
http://shop.advanceautoparts.com/webapp/wcs/stores/servlet/product_dielectric-tune-up-grease-permatex_7730006-p?searchTerm=dielectric+grease

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RE: Old Mechanical Speed Controller. - 12/15/2012 4:59 PM   
OvalRacer99



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Status: offline 		You might also hit up the auto parts store and ask for slip ring grease. It is used on the contacts between the steering wheel and column for the connections for air bags, horn and the other electronic gadgets in the steering wheel. Yes, it is conductive!!


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RE: Old Mechanical Speed Controller. - 12/15/2012 6:55 PM   
The Mad Modder



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quote:

ORIGINAL: OvalRacer99

You might also hit up the auto parts store and ask for slip ring grease. It is used on the contacts between the steering wheel and column for the connections for air bags, horn and the other electronic gadgets in the steering wheel. Yes, it is conductive!!


Still think that'd be a bad idea for lubricating a switch.

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RE: Old Mechanical Speed Controller. - 12/16/2012 3:26 AM   
phmaximus



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quote:

ORIGINAL: OvalRacer99

You might also hit up the auto parts store and ask for slip ring grease. It is used on the contacts between the steering wheel and column for the connections for air bags, horn and the other electronic gadgets in the steering wheel. Yes, it is conductive!!



Good idea,

I'm starting to think Tamiya switch lube is conductive. The new version Mini 4WD Switch Lube

This item is a set of optional parts for Mini 4WD car models.  
Lubricate those switches with this handy tube of switch glue! Enhances the conductivity of battery terminals. 

That makes me think, if there is a smear of non conductive grease on a contact how is that going to improve conductivity?
IMO a coating of non conductive grease will increase the resistance, and would be more prone to arching.....

Come to think of it.... I'm positive it's conductive. My first electric what a Tamiya Wild Dagger, it had a twin motor MSC and after a while when the crease wore off from cleaning, the contacts started to get deep pitting marks, and were very worn down.
I suspect these marks were from arching because lack of lube and Not from friction wear.


I'm interested to know for sure


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RE: Old Mechanical Speed Controller. - 12/16/2012 3:42 AM  1 votes
OvalRacer99



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quote:

ORIGINAL: The Mad Modder

quote:

ORIGINAL: OvalRacer99

You might also hit up the auto parts store and ask for slip ring grease. It is used on the contacts between the steering wheel and column for the connections for air bags, horn and the other electronic gadgets in the steering wheel. Yes, it is conductive!!


Still think that'd be a bad idea for lubricating a switch.


Wouldn't a non conductive lubricant effect the conection between the wiper arm and the contacts?

P.S. Been there, done that and works good as long as you do not over apply it!!!!



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RE: Old Mechanical Speed Controller. - 12/16/2012 4:42 PM   
The Mad Modder



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quote:

ORIGINAL: OvalRacer99


Wouldn't a non conductive lubricant effect the conection between the wiper arm and the contacts?

P.S. Been there, done that and works good as long as you do not over apply it!!!!



No, unless your contacts are very wide and flat, they will press through the grease to make contact.

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RE: Old Mechanical Speed Controller. - 12/16/2012 10:22 PM   
phmaximus



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Status: offline 		I've got a MSC in hand, so if u apply some marine grease I won't see a increase of resistance?

Are u guys 100% sure about it been non conductive. I'm struggling to believe it. And wonder if u are just assuming?

If u believe it's a fact please share the link to the information


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RE: Old Mechanical Speed Controller. - 12/17/2012 2:03 PM   
The Mad Modder



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Status: offline 		"Lubricants in large quantities act as insulators. So it's not surprising that some people mistakenly think that lubricants used on switch contacts need to be electrically conductive."
Quoted from...
http://machinedesign.com/article/lubricating-electrical-switches-1025

Realistically, though, most greases should work fine as long as they aren't specially formulated to be conductive or have too much applied.

Edited to be more visible.

< Message edited by The Mad Modder -- 12/17/2012 4:09 PM >

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RE: Old Mechanical Speed Controller. - 12/17/2012 3:23 PM   
Foxy



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quote:

ORIGINAL: phmaximus

I've got a MSC in hand, so if u apply some marine grease I won't see a increase of resistance?

Are u guys 100% sure about it been non conductive. I'm struggling to believe it. And wonder if u are just assuming?

If u believe it's a fact please share the link to the information


I said from the start it was an assumption, I'm not sure about it at all, but I also can't be assed to find out for sure. A cursory search provided little info. But I don't see why you should need conductive grease on a metal to metal contact. I would want to isolate the other contacts. Anywho...

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