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7. ADJUSTMENT
BAS-311G, BAS-326G
92
7-6. Adjusting the needle clearance
Turn the machine pulley to align the tip of the rotary hook with the center of the needle, and then loosen the set screw (1)
and turn the eccentric shaft (2) to adjust so that the clearance between the needle and the rotary hook is 0.01 − 0.08 mm.
7-7. Adjusting the shuttle race thread guide
Install the shuttle race thread guide (1) by pushing it in the direction of the arrow so that the needle groove is aligned with
the center of the needle plate hole.
NOTE:
If the shuttle race thread guide is in the wrong position, thread breakages, soiled thread or tangling of the thread may
occur.
The position of the shuttle race thread guide is adjusted at the time of shipment from the factory. It should not be
changed if possible.
7-8. Rotary hook lubrication amount
The optimum position is when the head of the set screw (1)
is aligned with the edge of the bed. The rotary hook
lubrication amount can be adjusted within three turns to the
right from that position.
• If the set screw (1) is turned clockwise, the lubrication
amount becomes smaller.
• If the set screw (1) is turned counterclockwise, the
lubrication amount becomes greater.
0.01 − 0.08mm
3574Q
0138Q 4995Q
4996Q
Less oil More oil
Aligned