17 replies to this topic

[Rob Deakin]

Hi Everyone,

I've come across some old slot car motors in various states of working order and trying to identify make and model. Any assistance is most appreciated.

I have a couple of photos of the first one.





The second motor pics below is from Dynamic, although I believe that this one was manufactured by Mabuchi for Dynamic. Is this one of the "Hornet" series?





The third one... I have no idea... Tradeship Micro Motor?



Again, any help is most appreciated

Thanks,

Rob

[Tex]

I don't know anything about the first motor.
 
The only thing I know about the secnd motor is that it could be a 26D can.
 
I don't know if your guesses on the third motor are right or wrong, but two other possibilities would be Atlas or Pittman.

[Rob Deakin]

I also found another couple of motors that I cannot identify.

The first of these (see pics).



The second one (see pic).



Thanks again!

Rob

[SlotStox#53]

In your first post the first motor looks like a Pittman don't know the model number. The second is a 26D and the third one looks like a Pittman 196B.

In the next picture the first motor is one by MPC; I think it is a Dyn-O-Charger.

[Hermit #1]

Deleted - accidental double post.

[Hermit #1]

I also found another couple of motors that I cannot identify.

The first of these (see pics).



<SNIP>

Yessir, definitely a Dyn-O-Charger.  Had one given to me back in the day, rewound it and turned it into nothing more that a heat factory...   

They did make a distinctive "growl" when jaunting around the track.

[Gator Bob]

Guess:

 

#1 - DC-706

#2 - Dynamic (stock) Mabuchi 26D

#3 -  DC- 196x

#4 - MPC Dyn o Charger

#5 - Same as Atlas except for the brush set-up. The clue to who built these cars is the rear brass body mount. Looks the same as an Atlas nose piece and those are the same pinions Atlas used. (AristoCraft?)

[don.siegel]

#3 is the Pittman DC196B, not X. 

 

#5 is indeed an Atlas - the first versions of these motors had this brush setup, then they quickly changed to the one we all know, with the cylindrical brushes. 

 

Don 

[Gator Bob]

Hi Don,

 

I put 196x as I didn't know if it was A or B.

 

That's cool it is all Atlas, didn't know they used brush arms.

I got my 1/32 Atlas set in (IIRC) Christmas 1963. They had the cylindrical brushes.

Hillside NJ was just down the Parkway...

 

Is the brass rear pan the body mount for the 1/32 Ford GT? 

[bluecars]

BOB; The first one is a Pit. 705. The 706 is black. There was also a 704 that had the axle on the opposite side of the armature. Have had all three. 706 was a great improvement over the others.

[Horsepower]

Guess:

 

#1 - DC-706

#2 - Dynamic (stock) Mabuchi 26D

#3 -  DC- 196x

#4 - MPC Dyn o Charger

#5 - Same as Atlas except for the brush set-up. The clue to who built these cars is the rear brass body mount. Looks the same as an Atlas nose piece and those are the same pinions Atlas used. (AristoCraft?)

I think number 2 is an AMT motor. Dynamic was green.

[don.siegel]

Here's the DC706 - the only one with brass in the end plates, which is why his motor looks like this one. The 704 was with the axle through the motor and it came in a 704A version with the magnet reversed; the 705 was only in the latter layout, with the magnet at the front of the motor. The 706 came with the axle in the middle, but could easily be reversed since it's endplates were screwed together, not crimped. 
 

 
The later Dynamic motors were also chrome; as were Champion 26Ds and probably a few others. The AMTs were purple (Dynamic was an AMT subsidiary for a couple years); the green Dynamics were all rewinds. 
 
Here's the 196A and 196B - very similar from the bottom, not so from the top! 
 
A

 
B

[don.siegel]

PS: Bob, hate to say it, but earliest mention I see of the Atlas cars is late '65, early '66, so your memory seems to be off by two or even three years... 
 
I don't think this brush set-up lasted very long, judging by the percentages of motors left on the market. 
 
The cars are announced in the December '65 issues of MSC and MC&T, with this motor that has the conventional brushes. No mention of the sets, but that doesn't automatically mean they weren't out yet... The January '66 issue of Model Car & Track (so from Oct '66 or so) has a full review of the available sets, and no mention of the Atlas 1/32 model, only their HO sets.

They also have a couple pages on the new Atlas line, with no mention of the sets, but Atlas already has their controllers out, so the sets were probably close behind. 
 
Don

[Ecurie Martini]

Pittman 70X motors:
 
The first Pittman "sidewinder" was the 703 - called a conversion motor since it was designed as a replacement for the (cheap) Japanese motors supplied with the HO Hobbytown diesel locomotives. The pole pieces were black, the output shaft a plain 1/8" shaft extending well beyond the motor on both sides as it was designed to drive the locomotive trucks via twisted rubber bands. This version used a nylon spur gear that typically needed to be cross-drilled and pinned to the axle for reliability.
 
The next iteration was the 704. It shared the black stamped pole pieces of the 703 but substituted a brass spur gear for the nylon one. I do not recall if the 704 output shaft was plain or threaded.
 
The 705 had the same general arrangement but a very different appearance. The stamped pole pieces were bright, not black and a crude "broken from a multiple casting" magnet replaced the machined magnets of the '03 and '04 versions. This model definitely had a threaded output shaft.
 
The final 706 model discussed above was a complete revision with cast pole pieces and end plates and a return to the fully machine magnet. It was, as a consequence of the cast end plates, slightly wider than its predecessors, making a refit for those models where the earlier series was a tight squeeze problematical (e.g. motorized Merit Vanwall)
 
EM

[Rob Deakin]

Thanks for the information, everyone!

I took a few more pics of the larger Pittman, which show areas and features that may not have been readily
visible in the first two pics. I also found a reference on the 70X series:

Pittman Motors

I ruled out 706 after measuring width between axle bushings with calipers. Width is exactly 1.516".

But, even after staring (probably too long) at diagrams, I'm still having trouble figuring out whether it is a 704A or 705. It looks closer to 704A... Am I missing something?







Rob

[don.siegel]

Definitely a 706, Rob. It's the only one with the screw-on upper and lower plates in that color...
 
Don

[Rob Deakin]

Hi Don,

What about the width measure being 1.516" (which is spec for 704A or 705) between bushings as opposed to 1.532" for the 706? I measured it twice with high precision calipers and it was dead on 1.516".

Merci!

Rob

[Ramcatlarry]

The 703, 04, and 05 all used the sheet metal top and bottom plates, usually plated in the USA. The 706 had the cast (or machined) black top and bottom plates that conducted the magnetism much better. The 703 train motor was real slow. 

Strombecker and Ram also made clones of the 704/5 models.