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Christy

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Reply with quote  #1 
I've had a few Singer 401's 403's 500's and they all seem to have this sound like an airplane taking off.  My 301's are much quieter.  Is that normal?  I had someone ask me about it concerned maybe a bearing was going out.  To me it's the normal sound.  What would it sound like if a bearing were going bad?



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  • Christy
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WI Lori

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Reply with quote  #2 
Hmm, my 401 definitely has a higher pitch to it than the 301, comparatively quiet. Perhaps because the 301 has a lighter, straight stitch mechanism to drive? The 401 has to push a lot of steel. My 404, though, sounds...tight, a harder working sound. I need to oil that motor bearing. I haven't used the 503 yet. It had a bad bearing, but was beyond the early stages, it had a grating feel to it.


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Christy

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Quote:
Originally Posted by WI Lori
Hmm, my 401 definitely has a higher pitch to it than the 301, comparatively quiet. Perhaps because the 301 has a lighter, straight stitch mechanism to drive? The 401 has to push a lot of steel. My 404, though, sounds...tight, a harder working sound. I need to oil that motor bearing. I haven't used the 503 yet. It had a bad bearing, but was beyond the early stages, it had a grating feel to it.



That was my understanding that a bad bearing would be more of a grating feel.  I don't think any other machine I have makes quite the same kind of sound that the 400's and 500's do.  The 500's even have an image on the stitch length guide that looks like an airplane.


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Chaly

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Reply with quote  #4 
My 500 and 401 have a soft humming sound from the motor when the clutch is disengaged. With the clutch engaged it is a bit more mechanical hearing the needle bar's movement.  No detectable sounds coming from the cam assemble or bobbin area.

It is a very different sound than my potted motors, featherweight's, or 301. But I would describe it as a smooth running sound, not grinding, high pitched, or in anyway noisy.  Just more of a humming that is produced by this motor type.
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Cari-in-Oly

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Reply with quote  #5 
Ahh, the famous Singer slant whine. I have hearing issues in that I have a hard time hearing low tones but high pitched tones can make me want to jump out of my skin. I can definitely tell when that upper bearing needs oiled. Luckily I have never had one needing to be replaced,  a drop of 30wt. quieted them right down.

Cari

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WI Lori

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Reply with quote  #6 
Mulling over my 503 with the alleged crunchy bearing...
The bearing wasn't bad, but was replaced anyway, as the bearing cost only $3.
Igor had been playing with the unit prior. I remember a set screw on the motor shaft was impossible to remove...
Off to find my email chain regaling Igor's antics, and our expert's resolution.

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Lori in Wisconsin
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WI Lori

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Reply with quote  #7 
Managed to get a drop of 4 stroke oil on the 404 bearing. It seems much happier now.
Did not find the email chain re: 503 repairs. I tend to be trash can happy (mad?). Lol

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Christy

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Reply with quote  #8 
I completely cleaned and oiled the 401 I had on  my desk and the sound is exactly like 2 other 401's in the house so I am pretty sure the sound I am hearing is the normal sound.  The chances that I have 3 401's all with bad bearings is far less likely!  I joined a 401 slant group and found a few videos allowing me to hear the sound and yep, normal.  So then I pop a 503 up on the table and once again--weird sound!  I isolated the motor and that's not it.  It seems to come from the handwheel.  I really don't like the handwheel on the rocketeers.  They are made to look very streamlined but it does put the wheel right up extremely close to the machine body.  It feels like it should have a washer there to give just a bit of space, but in all my research I only came up with the same three pieces-the handwheel, the clutch wheel and the stop washer.
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  • Christy
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Chaly

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Reply with quote  #9 
I've only had two rocketeers so I have little experience with sound on these models- but at least on my two (including my current one) the change in sound when the clutch is engaged is only coming from the front part on the machine - needlebar - and no added sound from the hand wheel.  To me, my 401 sounds like my 500.
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