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twentypoundtabby

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Reply with quote  #1 

Hi all,

I'm trying to restore a MOP covered Singer 12 that was converted to a lamp by using parts from a beater Singer 12. The person who lampified the MOP Singer 12 left the main horizontal drive shaft, but took out the gears shown here in the beater 12. How do I get these gears in the red circle out so I can put them in the MOP 12? I see what looks like a screw missing pointed to by the blue arrow. 

singer12gears.jpg 



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Singer 15-80, 15-88, 15-91, 20, 24, 115, 28, 66, 99, 201-2, 221, 301, 328, 401a, 503a, 600,  Improved Family, New Family and VS2
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HelenAnn

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Reply with quote  #2 
I would loosen the screws  on both gears. Then remove and keep track of the set screws.  I believe if you can get the top gear to move to the right on the shaft that the lower gear will lift off.
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HelenAnn central Minnesota
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OhioHills

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Reply with quote  #3 
If you only want to use the lower gear....   the set screw is removed and there is a tapered pin that must be popped out.  That means it will only be driven out in one direction.  the vertical shaft must be moved down to to free up the gear.    On the bottom side is the eccentric counter weight and the linkage that drives the shuttle.  The gears and counter weight are cast metal and will not tolerate abuse...  That glob of metal on the shaft as it passes through is also required to be released.  
The shaft looks to be very dirty / rusty , that's a problem that must be cleaned up to ensure the shaft will slide on  the shaft and down into the base.   When you assemble the parts,  the gears must mesh correctly .....  both gears have a punch mark one is one the tooth and the other is on the trough of the gears.   that is your timming.  And again the pin is tapered it will only go back when both the shaft and gear hole are in the correct line.   Get it backwards and the pin will not seat as you see it  now.  It will stick way out.


lou
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twentypoundtabby

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Reply with quote  #4 

 

I found the tapered pins on the collar of the lower gear and the collar at the bottom of the shaft. Both tapered pins came out fairly easily with a nail set and light tapping. Set screws are gone. But now the shaft appears to be very stuck despite cleaning with acetone, oiling and heat. I don't plan on messing with the counter weight and linking - will just move it over with the shaft if I can ever get the shaft out. The shaft is dirty, but fortunately no rust.  Thanks!

 

Quote:
Originally Posted by OhioHills
If you only want to use the lower gear....   the set screw is removed and there is a tapered pin that must be popped out.  That means it will only be driven out in one direction.  the vertical shaft must be moved down to to free up the gear.    On the bottom side is the eccentric counter weight and the linkage that drives the shuttle.  The gears and counter weight are cast metal and will not tolerate abuse...  That glob of metal on the shaft as it passes through is also required to be released.  
The shaft looks to be very dirty / rusty , that's a problem that must be cleaned up to ensure the shaft will slide on  the shaft and down into the base.   When you assemble the parts,  the gears must mesh correctly .....  both gears have a punch mark one is one the tooth and the other is on the trough of the gears.   that is your timming.  And again the pin is tapered it will only go back when both the shaft and gear hole are in the correct line.   Get it backwards and the pin will not seat as you see it  now.  It will stick way out.


lou


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Singer 15-80, 15-88, 15-91, 20, 24, 115, 28, 66, 99, 201-2, 221, 301, 328, 401a, 503a, 600,  Improved Family, New Family and VS2
https://www.flickr.com/photos/twentypoundtabby/albums/72157681182419630
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OhioHills

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Reply with quote  #5 
your welcome,  hope you get the gear and the thrust bearing loose.  The horizontal shaft is not of uniform tolerance along its length.  You can assume that that gear will not slide to the right far enough to result in useful clearance .....  I have broken the thrust bearing in the course of taking these part out.
And,,, these old machines are not made uniform tolerance.  A part from one machine may fit ,  too tight/ too loose.  I have posted in the past pictures of the machine all laid out on the table.

lou 
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HelenAnn

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Reply with quote  #6 
Lou thank you for the detailed instructions. I have not had to take those gears out yet. Cleaning them has been easy and effective for me so far.
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HelenAnn central Minnesota
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OhioHills

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Reply with quote  #7 
HelenAnn ,  Your also welcome,  I have several of these 12"s.  My first two were boat anchors/ total rust and devoid of paint and zero movement.  I broke a thrust bearing ,  The counter balance on the bottom was broken by previous owner, he was going to part it out, on Etsy.  I have seen broken gears,  Ebay tool box of singer parts mostly for the 12, included one that had been repaired in the past.  A Precise feat of machinist skills.  

loy
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