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Armatures to grind


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#1 Dan Miller

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Posted 08 March 2019 - 12:51 PM

I have a few armatures to grind to size. These are mainly Scale Eurosport arms but there are a few Open class AA/FC armatures mixed in as well as a few C-Can drag arms for a friend.

Armatures to finish 005.JPG
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#2 Geary Carrier

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Posted 08 March 2019 - 12:58 PM

More like a fleet...


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Yes, to be sure, this is it...


#3 Alchemist

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Posted 08 March 2019 - 01:54 PM

What Geary said! LOL!
 
Hi Dan,
 
Would you show a close up view of a before and after please - if it isn't an inconvenience.
 
Thanks for sharing, Dan!
 
Ernie
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#4 Racer36

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Posted 08 March 2019 - 02:13 PM

Nice collection, Dan!

Dennis Dominey

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#5 olescratch

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Posted 08 March 2019 - 03:30 PM

Wow! Who did the winding on these arms? Nice!
John Stewart

#6 Dan Miller

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Posted 08 March 2019 - 04:15 PM

Ernie... I will post a few photos in the future.
 
John... Thanks. I make these armatures. Since 1979.
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#7 Jesse Gonzales

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Posted 08 March 2019 - 04:31 PM

Absolutely beautiful, Dan, not only do you wind with top shelf skill but your blanks are like individual works of art.

Were any of these going to be capped?
 
Jesse Gonzales
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#8 Gil Gundersen

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Posted 08 March 2019 - 06:42 PM

Glad to see you haven't run out of winding flux.
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#9 Jesse Gonzales

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Posted 08 March 2019 - 07:49 PM

It's great to see you on SlotBlog, Gil! how are you doing?

I'm looking for the "winding flux" that you and John gave me when the bunch of us dropped in to Thorp's way back. Can't get the coils tight without it. :-)
 
Take care.
 
Jesse Gonzales

#10 Dan Miller

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Posted 08 March 2019 - 09:31 PM

Jesse... Most will be capped. The Scale guys now run 5/40 for gear ratios and small diameter tires. The armature RPM is quite high.
 
Boola... Winders' flux cooling in the fridge at all times.
 
Thanks to those with positive comments. I will post photos again in the future.
 
After this batch, I have another 200 Scale arms to do. Also working on a new interior design for my commutators. It has taken some time to develop but making my own commutators in-house has been a real challenge. The next design should be my final version. I hope so at least.
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#11 W. J. Dougherty

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Posted 09 March 2019 - 12:25 AM

To what diameters are you grinding these arms? What's the convention for diameters these days? Thanks...
Yortuk & Georg Festrunk

#12 Dan Miller

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Posted 09 March 2019 - 09:14 PM

W.J.,
 
The majority of 90% are Scale arms and will be ground to .485". The C-can arms for drags will be .510". The full blown rather radical AA/FC Funny car arms will be .450" to .440".
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#13 Alchemist

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Posted 12 March 2019 - 07:22 PM

Hi Dan,

 

After this batch, I have another 200 Scale arms to do.

 

Wow! You'll be busy for little bit, Dan.

 

If I may ask you please, when you provide photos, would it be possible for you to provide photos of how the arm is mounted on the device and how you grind them?

 

Of course, if your technique is to be kept confidential, I understand unequivocally.

 

Thank you just the same, Dan! 

 

Ernie


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#14 Dan Miller

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Posted 13 March 2019 - 01:05 PM

Ernie,

 

I grind arms on a 10" X 24" utility lathe that is about 1,200 pounds of old, cast iron. New lightweight lathe would vibrate. Made my own tool post grinder to save $1,000. Have used this setup for 30+ years now.

 

Contact Patrick Skene of the British Slot Car Racing Association. In the BSCRA magazine I did a three-part article on making armatures. If Pat has any back issues, you will see a ton of photos on how I make armatures.

 

If you want someone to grind arms for you, maybe ask Alpha, Camen, Jim Hahn, or Bill Bugenis. I only grind my own new arms.

 

Dan


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#15 Dan Miller

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Posted 16 March 2019 - 11:34 AM

Ground and dyed. About 6 more steps to finish them.

Attached Images

  • Armatures 098.JPG

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#16 Bill from NH

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Posted 16 March 2019 - 11:49 AM

Dan, do you ever put that red dye on using a foam brush? For my 1 or 2 arms, I often use a cotton swab, but I do have to be careful about them giving off lint.


Bill Fernald
 

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#17 Dan Miller

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Posted 16 March 2019 - 04:21 PM

Bill...
 
Years ago I came across a small 2 oz bottle with the brush attached to the cap. I have been refilling that bottle for years now. No idea where I got it. I simply load the brush up with Dykem and flow it on rather than brush it on. It seems too thick while flowing off the brush but Dykem dries rather quickly. You learn how to apply it after doing a few arms that way. You develop a way to hold the arm so the dye does not run down to one end. It's practice. I imagine a small, flat wide tipped sort of rectangular artists oil painting brush would work just fine. Maybe a tip of about 3/16" would do. Do not paint it on. Flow it on.

#18 Bill from NH

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Posted 16 March 2019 - 04:41 PM

Thanks for the response, Dan! Lucky Bob's Raceway in Milwaukee, WI, has been selling bottles of arm dyes with brushes in the cap for years. Perhaps that's where your came from. The bottles I have from there have nylon bristle brushes rather than natural hair bristles. I learned a long time ago not to paint the dye on, but to flow it on. :laugh2:

Bill Fernald
 

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