Thread is shredding, balling or breaking
There are a number of causes for breaking thread� Start with step 1 and stop as soon as the problem is resolved�
1� Lower Presser Foot
Make sure the presser foot is lowered before starting to sew�
2� Machine Threaded Correctly
Check that your thread is correctly threaded along the thread path (p� 15)�
3� Thread Snagging
Make sure the thread is not snagging anywhere from the cone/spool to the needle�
57
Thread Issues
4� Incorrectly Installed or Damaged Needle
Make sure your needle is installed correctly (p� 32)� Carefully inspect the needle for burrs, warping or damage to the point
that may be causing needle deection and shredding the thread. Bent or damaged needles must be replaced.
5� Incompatible Needle Size & Thread Weight
If the thread is too thick or thin for the needle it will not pass through the needle eye to form a loop and will instead ball at
the needle� Check the compatibility of the needle size and thread weight (p� 4)�
6� Burred Gib Hook or Retaining Ring Cap Spring
A machine bind or needle strike to the shuttle gib hook (A) or retaining ring cap spring (B) may result in a burr or damage
which can cause the thread to snag�
Remove any burrs by polishing them with emery paper or a ne le. If badly damaged, replace with a new retaining ring
cap spring (#160311) and/or new shuttle gib hook (#960122)�
7� Machine Has Gone Out of Timing
If the machine is out of timing, it may cause the gib hook point to cut or shred the thread� To reset the timing on your
machine, follow the steps outlined in “Ultrafeed Timing” (p� 45)�
Burred Area
Burred Area
> Retaining Ring Cap Spring> Gib Hook
58
A
B
39 | Sailrite�com Ultrafeed
®
LS Guidebook | 40
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