Singer 281-5 - Setting the Lower Needle Bar Bushing; Setting the Needle Bar Height

POSITIONING NEEDLE IN RELATION TO THROAT PLATE
AND FEED DOG (MACHINES 281-22 AND 281-24)
NEEDLE
HOLE V
PINCH
SCREW
NEEDLE BAR
FRAME
Fig. 39. Positioning the Needle (front to rear)
on Machines 281-22 and 281-24
THROAT PLATE
SEATv
BOTTOM OF
LOWER NEEDLE
BAR BUSHING
2.599"
Fig. 40. Correct Setting: Needle Bar Bushing
THROAT PLATE
SEAT ^
NEEDLE STOP
J...
0.866" (281-24)
1.031" OTHERS
Fig. 41. Setting Needle Bar at Correct Height
(Using Gauge Distance)
Needle should not contact surfaces of throat plate
or feed dog.
Needle, needle bar and needle bar frame may be
positioned forward or backward, after loosening pinch
screw, shown in Fig. 39.
To adjust, set feed eccentrics for longest stitch,
as instructed on page 13. Insert needle correctly in
needle bar. Remove face plate and slide plate.
Loosen pinch screw and move needle bar frame,
as required. Securely tighten pinch screw and replace
all parts previously removed.
SETTING THE LOWER NEEDLE BAR BUSHING
ON COMPOUND FEED MACHINES 281-22 AND 281-24:
The lower needle bar bushing is integral with the
needle bar frame and does not require separate setting.
ON ALL OTHER MACHINES: Gauge distance from
throat plate seat to bottom of lower needle bar bushing
is 2.599 inches.
Raise or lower needle bar bushing, as required to
obtain
correct height setting, after loosening bushing
set screw shown in Fig. 40.
SETTING THE NEEDLE BAR HEIGHT
(without using timing mark)
Machine 281-5: Remove bed
raising plate.
All Machines: Remove face plate, slide plate and
throat plate.
When needle bar is at its lowest point (during rota
tion of machine pulley), the gauge
distance from throat
plate seat to needle stop in needle bar, as shown in
Fig. 41, is - - -
0.866 inch for Machine 281-24
1.031 inches for all other Machines.
To set needle bar height, loosen the needle bar
clamping screw shown in Fig. 41. Raise or lower
needle bar as may be required. Securely tighten clamp
ing screw. Replace all parts previously removed.
When replacing face plate, make certain that screw
holes in gasket align with screw holes in face plate,
to avoid injury to
gasket and subsequent oil leakage.
From the library of: Superior Sewing Machine & Supply LLC