Juki 1541s Clone Bobbin Case Comparison

[Foiler]

Hello all.

I am new here, but I have learned much by searching the forums.

My wife and I just purchased a barely-used Econosew DNU-1541s (Jukie 1541s Clone) in beautiful condition.  My wife is a very experienced sewer, and I am just learning to sew.

We recently hired an experienced technician to check over and adjust the machine, as this is our first walking-foot machine.  The technician sold us a replacement "M-size" bobbin case, as the original bobbin case's tension spring was slightly out-of-round.  The replacement bobbin case is shown on the right-hand side of the attached picture.  The original bobbin case is shown on the left - inserted into the hook's carrier.  I removed the carrier to clean and investigate.

Notice that the original bobbin case's spring latch and protrusion are oriented at 90-degrees, relative to the bobbin case opening at the 12-o'clock position.  This bobbin case inserts with a definitive "click", as the protrusion matches the notch in the hook's carrier.

In contrast, the new bobbin case's spring latch and protrusion are oriented at approximately 110-degrees, relative to the bobbin case opening.  The new bobbin case's protrusion does not match the notch in the hook's carrier.  Therefore, the bobbin case doesn't appear to lock into the carrier or onto the carrier's post.

My wife sewed an entire day with this new case, before experiencing a thread jam and needle break.  It appeared to me that the new bobbin case had rotated within the hook carrier.

My Questions:  Does Juki (and the clones) sell two styles of "M-sized" bobbin cases for their machines?  How can we ensure that we are ordering the correct bobbin case - with the latch and protrusion at 90-degrees, relative to the bobbin case opening?

I just ordered a Juki OEM bobbin case the other day, but I'm now concerned that I will be receiving the wrong style bobbin case.

Thanks in advance for your help!

Dale

[Wizcrafts]

Call your technician and tell him that he sold you the wrong part. It should be on the installer to install a correct part.

[kgg]

The one on the right appears to be the same as the one in my Juki 1541S (I have it in my hand) however it could be the angle of the photo but it appears to be missing the flat bluish coloured tension spring that puts pressure on the bobbin.  The one on the left maybe specific to the Consew line or someone changed it. I agree with Wiz that the mechanic should be notified and he/she has made a mistake.

kgg

[Foiler]

Wiz & Kgg,

As a follow up:

I have contacted the technician about the part discrepancy.  He will be refunding me the purchase price, but we are both having difficulty finding the correct bobbin case P/N.  I also called MJ Foley about this, and they only show one P/N (B1837-247-S00) for the Juki DNU-1541S model.  I will be taking my "90-degree latch" bobbin case to MJ Foley tomorrow to try to match parts.

I suspect that my Juki clone is using a generic M bobbin case, like P/N BC-DBM(1)-NBL.   We will see.

Both bobbin cases pictured have the anti-backlash spring installed.  The camera angle was deceiving.

Regards,

Dale

 

 

 

[shoepatcher]

Ask for Luke when you get there!!

glenn

[Foiler]

Juki 1541s Clone - Bobbin Case Summary

My search for a spare "M-sized" bobbin case for my Econosew DNU-1541s has been an educational journey.

My machine and many other Chinese-manufactured, cloned Juki 1541s machines (i.e. Consew P1541S-CC, Reliable 4200SW, Yamata 1541S, etc.) share many common internal parts with the Japanese Juki.  However, the bobbin case and bobbin case carrier are not one of them.  Perhaps for patent-infringement reasons or others, the clones seemed to have chosen a more traditional design.

My Econosew DNU-1541s (and many other clones) use a generic M-sized bobbin case P/N: BC-DBM(1)

This walking foot, bobbin case design has the bobbin case latch and locking protrusion oriented at 90-degrees, relative to the elliptical bobbin case opening at the 12 o'-clock position. 

The Juki DNU-1541s uses a generic M-sized bobbin case P/N: BC-DBM(2).

This bobbin case design has the bobbin case latch and locking protrusion oriented at approx. 110-degrees, relative to the elliptical bobbin case opening at the 12 o'-clock position.

Summary:  Don't assume that your Juki 1541s Clone machine uses the same bobbin case as the original Juki 1541s.  The Juki bobbin case will "fit" in the clone's bobbin case carrier, but it will not lock.

Uwe Grosse has posted an excellent YouTube video on the subject of bobbin cases here.

Regards,

Dale

 

 

[Gregg From Keystone Sewing]

Juki DNU-1541, and DNU-1541S both use different hooks, and the same bobbin case.  

The Econosew, even if it has a safety clutch, does not have a bobbin case opening lever, like the Juki S model does.  Not a problem, in my opinion, but would indicate that they may be using a different hook and bobbin case?

Also, why not contact EconoSew in regards to this, I'm sure they are eager to help.  They love selling parts, too.

[Foiler]

2 hours ago, Gregg From Keystone Sewing said:

The Econosew, even if it has a safety clutch, does not have a bobbin case opening lever, like the Juki S model does.

Hello Gregg,

Perhaps the newer Econosew models have changed.

My Econosew DNU-1541s has a safety clutch, and the original bobbin case definitely has an opening lever - as pictured on the left in my first post above.  The original instructions also make note of the lever (called “gib” in manual).

 Maybe my perception is wrong, but I’m detecting some sarcasm in your advice to contact Econosew (e.g. The Feit Co. in CA)

What can I say?  I purchased this machine on CL from the original owner at less than 1/3 the cost of a new Juki, so I accepted the risk of a used clone.

After replacing the original clutch motor with a servo motor, a professional tune-up, and routine oiling, it has been working and sewing great.

Kind Regards,

Dale

 

 

 

[JJN]

@Foiler, I think Gregg was referring to the part in this photo when he said 'bobbin case opening lever'. Not the latch on the bobbin case itself.

 

[Foiler]

Thanks for the photo, JJN.

I misunderstood Gregg’s statement, if that was the lever he referred to.  I stand corrected.

My Econosew does not have the lever pictured.

Does that Juki lever assist with the removal of the bobbin case?

Thanks,

Dale