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Making doo-dads Is kewl


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#1 havlicek

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Posted 04 February 2017 - 07:27 AM

So with the new cute little Grizzly lathe I got, I can make more doo-dads than ever before, but I have to learn how to use it. I gathered up some parts to make a motor, a set of EPX magnets, a ball bearing (unshielded this time so it looks a little more "not-so-unvintage") and a Mabuchi 16D can that had lost its rotating bushing. Now, while those bushings are OK when new and tight, I still don't like them at all. It's a goofy design the way I see it. Overly complex for what it has to do, large (waaay bigger than it needs to be), and prone to loosening up with time.
 
In the past, I simply reamed out the hole and soldered (or epoxied) a bearing or bushing into the can. That's a good way to have at it, because it leaves the circlip mounting method in tact, but there are all sorts of ways to mount a motor and I like to keep an already-large (by today's standards) motor as compact as possible. N-e-waze, I have a lathe and some brass and need "learning projects," so I made me up a doo-dad.   :D

After grinding off the old bushing carrier so I could measure what I needed to make, I got busy making big brass rod into smaller brass and a pile of chips. Here's what's left of the brass I didn't need:

IMG_1964_zpsy99pinka.jpg
 
All that for a piece the size of a small coin. :D

IMG_1960_zpson154bqy.jpg

Installed into the can, it's pretty trick... I think.

IMG_1961_zpskzhnayqp.jpg
 
... and inside, I kept the flange as thin as possible and recessed the bearing flange so as not to crowd the tail end of the armature:

IMG_1962_zps5x6yvzch.jpg
 
Dood-dads... I love making doo-dads! Now I gotta go clean up the mess. :D
 
-john
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#2 Samiam

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Posted 04 February 2017 - 08:12 AM

Neat doo-dad.
 
On the same line as "Duffies," can we call it a "Doo-Cek"?
Sam Levitch
 
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#3 airhead

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Posted 04 February 2017 - 08:13 AM

​Nice tire lathe you got there.
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#4 Mr. Hollywood

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Posted 04 February 2017 - 08:15 AM

John,

Looks like you are having too much fun! Keep up the good work. Always enjoy your posts.

back in the late '70s 79-80-ish we made parts for a Kawasaki drag bike trans with a Craftsman lathe like yours. Anything is possible.

Have fun.
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Joseph Gerencser

#5 havlicek

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Posted 04 February 2017 - 08:25 AM

On the same line as "Duffies," can we call it a "Doo-Cek"?

 
I have a catchy name for it already... I call it a "can bushing adapter"!
 
-john
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John Havlicek

#6 havlicek

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Posted 04 February 2017 - 10:05 AM

So with a doo-dad on the can end, I made some more doo-dads up that work for the endbell. I had originally gotten some of these from someone (I forget who!?) along with some other vintage stuff. All it is, is an adapter that will fit a 5 mm bushing or bearing into the bearing pocket on Mabuchi 26D endbells, and Chamption 16D and 26D endbells. It only looks like a short piece of tubing, but it solves some problems and is a really handy little guy:

IMG_1965_zpsyguwr8to.jpg
 
I have a way of adapting a 6 mm bearing for these applications that's kind of crude, but works like a charm and doesn't involve a lathe, but the resulting tubing is really thin... and I'm a little "askeered" of doing it on the lathe. After all, I'm a lathe-newbie. In any case, a 5 mm bearing works well and this way is faster/easier... at least after you make up the pieces, and these can be made up easily in "batches" so I made several of them in one shot:

The bearing is a nice slip fit into the adapter doo-dad:

IMG_1966_zpspwgsgfbn.jpg

The bearing adapter and bearing are a tight "snap-fit" into the bearing pocket:

IMG_1967_zpshrm2zoxc.jpg
 
Jeepers... there's doo-dads all over this motor (and now there are nice bearings on both ends)!
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#7 Steve Deiters

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Posted 04 February 2017 - 10:08 AM

It's always fun watching you resurrect the "dead."
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#8 havlicek

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Posted 04 February 2017 - 10:22 AM

Thanks, Steve. :)  

What I do is a lot less impressive than resurrecting the dead, but it is rewarding to see these old motors have a new purpose in retirement.  ;)  After all, modifying Mabuchis was important and even necessary even when they were brand-spanking new. I can almost smell the oil of wintergreen and cigar smoke mixed with melted endbells, and hear the guy behind the counter enticing me to get this week's "revolutionary" motor after last week's became obsolete.   :D
 
-john


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#9 SlotStox#53

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Posted 04 February 2017 - 11:31 AM

See you're putting you new toy to good use, John!

The adaptor thingies look really cool :D Being essential for perfecting the frail nature of the original parts.



#10 olescratch

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Posted 04 February 2017 - 04:04 PM

Always nice to be able to "produce" that necessary part whenever needed to finish the job, without waiting on it to arrive in the mail!  

 

It's gonna be interesting to see the things you come up with; keep'em coming! 


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#11 havlicek

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Posted 04 February 2017 - 04:15 PM

Thanks, guys.  :)

 

Always nice to be able to "produce" that necessary part whenever needed to finish the job, without waiting on it to arrive in the mail!

 

... and these couldn't even come in the mail, at least from a store! That makes them even better!


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#12 havlicek

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Posted 04 February 2017 - 04:17 PM

... and... bam! All dressed-up in "Grabber Green" and with both bearings installed in their doo-dads:

IMG_1968_zpstml1tjxb.jpg

IMG_1969_zps8gk6ujuo.jpg
 
-john
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#13 havlicek

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Posted 05 February 2017 - 07:35 AM

So after some minor cleanup to get rid of the "shmooshout" of the JB Weld in the can doo-dad and test-fitting of the magnets, I gathered up some lams and pressed and spaced a stack in preparation for winding an arm for this bad-boy. Nor real drama here, as a D motor (whether old or new) is a known quantity.  

Keeping the can doo-dad as thin and close-to-flush as possible with the bearing recessed left me with a nice length tail spacer, which isn't always the case with the EPX and other similar-length magnets in these old cans. The arm stack is .460" long, which will yield some more revs over the often longer D motor arms, and the wind can be anything from a #30 all the way up to the line between bravery and better judgement. :D

IMG_1970_zpsvqlwu5dc.jpg
 
-john
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#14 Eddie Fleming

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Posted 05 February 2017 - 08:12 AM

Love them doo-dads and that Green can. Nize.
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Eddie Fleming

#15 havlicek

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Posted 05 February 2017 - 09:06 AM

Thanks, Eddie!  

I have some work to do on the endbell hardware, but the motor's definitely coming along. I was thinking of setting things up for anglewinder, but on second thought, the endbell will get a more or less "regular" treatment, and there will be enough shaft for it to go either can drive or endbell drive, with endbell drive being preferred.
 
-john
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#16 MarkH

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Posted 05 February 2017 - 09:14 AM

It is all the little "doo-dads" that make up the difference between being at the top of your game or just hiring it out. Those small tools, rings, shims, holders, drill guides, alignment jigs all improve the sum of the whole. Fill the toolbox up and have fun.
 
I bet you lay awake at night thinking about the next one.
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#17 havlicek

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Posted 05 February 2017 - 11:14 AM

Nah, not really Mark. It's just nice to know the machine is there and I can use it to whip up something other than doing a workaround. I'm sure I'll be making some slugs for magnet-setting and turning down the odd endbell.  

In the not-to-distant future I'll add a micro mill as well, which will expand the possibilities further. Then a CNC water jet... just kidding.   :D
 
-john
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#18 Eddie Fleming

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Posted 05 February 2017 - 11:18 AM

John's tiny machine shop?


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#19 slotbaker

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Posted 05 February 2017 - 04:16 PM

Good stuff, John. It's great to see what can be done with a bit of imagination.
 

... In the not-to-distant future I'll add a micro mill as well, which will expand the possibilities further.


How about a CNC micro mill??? :shok:
 
Then you could make some real nice endbells as well.

:huh:
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#20 havlicek

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Posted 06 February 2017 - 06:45 AM

How about a CNC micro mill??? :shok:
 
Then you could make some real nice endbells as well.

 
Yeah... all I need is a new life and a winning lottery ticket!   :D
 
Anywho... heading towards the finish line, and with the plan almost fully implemented (as if I ever start these things with a plan), I got busy and wound me up a nifty 37t/27 arm on a .460" long blank I pressed with .560" lams. In this can, with the magnets epoxied-in, another boring step I skipped-over, the hole winds up at pretty much dead-bang .590". After removing the powder coat and cleaning things up, the arm still measures about .560" OD, so it will get just a bit of light grinding to true-up the stack before balancing.

IMG_1972_zpshod4zkdn.jpg
 
I soldered a set of 36D-sized (i.e. the modern standard) brush tubes to a set of bulletproofing plates, and capped those with a set of the larger 36D-sized "pentroof" hoods for some extra heat-dissipation and added some brass post sleeves. Everything got clearanced so as to avoid shorting between the hoods and the end bell bearing/sleeve assembly.  

When the arm comes back from grinding/balancing, final assembly will include a set of my .014" stainless steel springs for a bit more of the "custom" vibe, even though modern springs will fit the old 16D motors. I actually like mine better for these anyway, because I can cut the short spring leg long enough to reach both sides of the brush tube slots. I like to think it makes for a more positive spring-control sorta deal.

Here she is all mocked up for her "pinup" shot (I really gotta get me a life!):

IMG_1971_zpsinoab5qt.jpg
 
-john
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#21 olescratch

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Posted 06 February 2017 - 05:50 PM

Another fine job. 


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#22 havlicek

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Posted 07 February 2017 - 11:58 AM

Thanks, John!
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#23 havlicek

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Posted 19 February 2017 - 10:23 AM

...and this bad boy is dun-dee-dun-dun.  Pretty much threw everything AND the kitchen sink at this one, and boy does it sound like it!

e8ea9fcf-d9ff-41f5-b5d8-ee34dbc52fa2_zps4b03f831-58b9-474d-a80f-7774c117908c_zps


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