Bobbin Case Retaining Wire - Duerkopp Adler 745-26 Service Instructions Manual

15.11 Bobbin Case Retaining Wire

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Function
The bobbin case retaining wire 1 holds the bobbin case top and
bottom in a specific position counter to the turning motion of the hook.
The needle thread loop led around the hook is pulled through between
the spring-mounted retaining wire 1 and the edge 2 of the bobbin case
top.
Here the retaining wire 1 insures an unimpaired run of the thread over
the nose 7 of the bobbin case bottom and through the cutout of the
needle plate.
Settings
–
Between the edge 7 of the support nose and the edge of the
needle plate cutout there must be a thread throughput gap of 0.6 to
1 mm.
In this position the edge 8 of the bobbin case top lies about
parallel to the needle plate.
The gap assures a throughput for thicker sewing threads, too.
At the same time a sufficient jumping back of the bobbin case top
during the throughput of the thread at the edge 2 is made possible.
–
The retaining wire 1 must extend 13 mm out of the plate 5 and lay
on exactly in front of the edge 2 of the bobbin case top 9.
1 2
0,6 - 1 mm
7
8
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