Sailrite Leatherwork - Page 23

41 | Sailrite�com Leatherwork
®
Guidebook | 42
Check the Rotational Timing of the Shuttle Gib Hook
The Shuttle Gib Hook (A) is driven by the Shuttle
Driver (B)� To change the rotation of the hook,
the driver must be repositioned�
1� Turn the balance wheel so the gib
hook point (C) is at its furthest position
counterclockwise (47)�
2� Useyourngertopushthegibhook
counterclockwise to remove any gap at (D)�
3� Measure the distance between the gib
hook point (C) and the needle (E)� The
driver is correctly positioned when the
point is between 1/8 inch and 3/16 inch
counterclockwise of the needle (F)�
If spaced properly, the driver is set correctly�
If not, continue to adjust the driver (p� 42)�
Hook/Driver Gap
Oscillating hook sewing machines have loose tolerances between the Shuttle Gib Hook and the Shuttle
Driver� This play between the parts is intentional and allows the Leatherwork to sew a wide variety of
thread sizes� The typical play between parts is 0�04 inch�
47
B
A
F
C
E
D
48
Adjust the Driver
4� The driver is secured to the lower shaft with two set screws (G)� Loosen the screws and gently
twist the Shuttle Driver to match (47, F).Ifthettotheshaftistight,carefullyuseascrewdriver
as leverage� Do not allow the driver to move to the left, which would be evident by any play
between H and I� Once proper position is found and there is no play between H and I, retighten
the two set screws (G)
After adjusting the driver, check the left-right positioning of the Shuttle Gib Hook (p� 43)�
G
H I