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GE Collar Gear CAD


Louis Luu

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Done with the nose cone.  I added room for new bushings which is readily available 12x15...8mm ID.

 

Edited by Louis Luu
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Dave Dalsin brass reproductions of past. BTW...I called Dave in recent past, he is not active here anymore, and has health issues, but it was nice to talk with him again. Nice friendly guy.

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Edited by Russ Huber
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I have one I got for free when an electronics firm got rid of their old ones. Once you use one these you will wonder why you didn't get one earlier. You can pull a hair out of a gnat's butt with one these.

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Vin McMaster did an article for the Fan Collector magazine years ago. It’s titled “Working On The Dreaded GE Collar Oscillator”.

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I've been playing around with the idea of reproducing these parts for a while,   I have 4 of these,   one of them fully works,  I have a 3d scanner if that could help with your work.

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Need to get this first before I start drawing...will be here by Wednesday for the front housing.  (Bearing Sleeve 8mm Bore x 12mm OD x 15mm Length Self-Lubricating Sintered Bronze Bushings).  I got two different styles...don't really know which ones to use yet.  I like to get everything ready before drawing.

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I have a 12' and 16" and neither has handles.  Based on where the 'hole' is the handle would have to be pretty wide to traverse the long tag.

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I asked for several reasons...

        Let's remember that some fans with a similar motor carried handles...

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        I imagine GE engineers and draughtsmen found it ill-advised to place the neck of a collar fan in such tension as bearing full fan weight might inflict... though a handle (my opinion) is always useful and good for the fan itself, one of the features making the loop handle a great design--- but that's another subject.

 

 

   Primarily though, my curiosity was aroused due to this photo:

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     Considering that the low end of the strap lacks rounded corners, I have viewed this as being an experimental or laboratory model, and to date I have never seen a production unit nor a photo of a production collar fan thus drilled and tapped and wearing a handle... until possibly now... The hole shown in Louis' photo is measurably lower than the screws holding the motor caps, while I'd judge that in the old photo they are higher up, but the tag isn't really a complicating feature in any event (look at the coin-op for perspective)...

    So two thoughts: it remains to be seen whether the soon-to-arrive residence collar fan has a second such hole; and for what other possible purpose would such a feature serve?

 

        This whole project is exciting, and a great asset in bringing this fan design to full relevance and functionality........

 

 

 

Edited by Steve Rockwell
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Nice 6 wing,   I've seen another member have one,  but they are pretty rare,   all 4 of mine are 4 bladed versions.  I'll try and get the parts scanned tomorrow

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I was able to get the lower gears out of one of the fans that needs restoring and clean them up as well as the box,  I'll probably glass bead the box to give a better surface to scan on the front.

If these bevel gears scan good and you can use the scans I'll go ahead and take apart one of my ones with good nose gears in it (just don't want to do that if the scans turn out not to be helpful)

It was interesting to find someone had already put a bronze sleeve bearing in this nose.

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You know,  thinking how this mechanism works,  it has a fatal flaw,    the pin that keeps the fan head from rotating 360 degrees will also cause the mechanism to "crash" or bind up if you engage the oscillator too close to one of the stops. 

Since you don't have an idea where the mechanism is in its sweep until you engage it,  it may be safer to remove that pin.  Or at least know to engage it only with the fan head facing straight forward, well away from either stop.

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1 hour ago, Louis Luu said:

Nose Cone:

Nose cone layout positioning:

image.png

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Large Bevel Gear:

Mating surface for large and small bevel gears:

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Small Bevel Gear:

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Worm Gear and Spur Gear:

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Spur Gear:

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That spur gear with the wheel has an extreme amount of wear on it,  you'll want to recreate the teeth back to their original size, about half of each tooth is missing

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This pin that is under the main body of the fan motor is shown close to one of the stops, if you were to tighten the collar with the motor in this position it would try to sweep past this point and either stall out the motor, slip the disk attached to the lower bevel gear, or break something 

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I wonder if they eliminated that pin (or added it) mid way during the production, the fan could rip its own headwire out if it was wrapped around the neck too much and the osc engaged without it, my fan pictured is the late model with the brass speed tag and steel struts, i have two earlier ones with painted numbers as well

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This process, your knowledge and determination amazes me.   Wish I was born 50 years later than I was.  I’d be all over this.  
 

On a personal note, you thing this process would work to recreate the rear gearbox for a GE AK1 AOU 75425?

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On 8/13/2022 at 5:09 PM, Louis Luu said:

Picked this up last night.  This should motivate me to make the front housing and gears.  I will make the front housing available in stainless steel and brass with bushing and oiler.  Original front housing had no bushing and oiler.

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Whatever happened to the GE kidney boxes????

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Just now, Louis Luu said:

Labor Day weekend.  I have contacted my caster yet.  Will do end of week and see if there is any to pick up.

Ah ok was just wondering as I'm not on this site that often and things may be getting posted about it without me even knowing it. Thanks!

 

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Just now, Charlie Wicks said:

Ah ok was just wondering as I'm not on this site that often and things may be getting posted about it without me even knowing it. Thanks!

 

I have you on my list...I remember.  My last batch ran out so I will be getting some more.

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Yeah, those are a worm wheel/gear rather than a spur gear,  each tooth is curved to match the worm itself as well as being on a slant,   also note that the worm on the intermediate set is a double start,  if its done as a single start the fan will oscillate at about half the speed it would with the factory gear.

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