Wind a decorative thread around the bobbin ; by hand. After winding the bobbin so it is ; filled as shown below (about 80%), cut the - Page 6

Brother SB4138 Operational manual for Bobbin Work Kit. (Optional accessory: SABWRK1)

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5

h

Wind a decorative thread around the bobbin 
by hand. After winding the bobbin so it is 
filled as shown below (about 80%), cut the 
thread.

i

Using scissors carefully trim the thread tail as 
close to the bobbin as possible.

a

Beginning of wound thread

j

Install the bobbin wound with thread.

Whether or not tension should be applied to the 
bobbin thread depends on the type of thread 
being used.

When tension is applied to the bobbin 
thread

Insert bobbin into bobbin case so the thread unwinds 
from the left side.
Then correctly pass the thread through the tension 
spring as shown below.

a

Tension spring

 CAUTION

• Be sure to use the bobbin case (gray) when creating 

bobbin work. Using any other bobbin case may 
result in the thread becoming tangled or damage to 
the machine.

• Make sure that the bobbin case is correctly 

installed. If the bobbin case is incorrectly installed, 
the thread may become tangled or the machine may 
be damaged.

 CAUTION

• Be sure to use the machine’s included bobbin or one 

designed specifically for this machine. Using any 
other bobbin may result in damage or injuries.

Actual size

This model

Other models

Note

• Slowly and evenly wind the thread around the 

bobbin.

• For best results, wind the bobbin so the thread is 

snug and not twisted.

 CAUTION

• If thread extends beyond the top of the bobbin too 

much, the thread may become tangled or the 
needle may break.

11.5 mm 

(approx. 

7/16 inch)

 CAUTION

• When winding the bobbin, make sure the thread is 

not frayed. Sewing with frayed thread may result in 
the thread catching on the tension spring of the 
bobbin case, the thread becoming tangled or 
damage to the machine.

• Do not guide the bobbin thread through the groove 

in the needle plate cover, otherwise the lower 
threading cannot be done correctly.

Detailed Information for Brother SB4138 Operational manual for Bobbin Work Kit. (Optional accessory: SABWRK1)

Lists of information found in Brother SB4138 Operational manual for Bobbin Work Kit. (Optional accessory: SABWRK1) - Page 6

  • 11.5 mm (approx.
  • Be sure to use the bobbin case (gray) when creating bobbin work.
  • Make sure that the bobbin case is correctly installed.
  • Be sure to use the machine’s included bobbin or one designed specifically for this machine.
  • Slowly and evenly wind the thread around the bobbin.
  • For best results, wind the bobbin so the thread is snug and not twisted.
  • If thread extends beyond the top of the bobbin too much, the thread may become tangled or the needle may break.
  • When winding the bobbin, make sure the thread is not frayed.
  • Do not guide the bobbin thread through the groove in the needle plate cover, otherwise the lower threading cannot be done correctly.

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