Bosch GST18V-50B Operating/Safety Instructions Manual page 19

CIRCLE CUTTING
Circle cuts can be made from 5" to 16-1/2" in
diameter.
1. Determine the center point of the desired
circle.
2. Drill a 3/16" (5 mm) center hole 7/8" (23
mm) deep in workpiece. (For enhanced pre-
cision, drill the hole using a drill press, if
possible).
3. Drill or plunge cut near the circle's edge,
turn saw off, and disconnect battery pack
from the tool.
4. Insert guide bar through a clamp, then
through the slots provided in foot, from ei-
ther side of foot (Fig. 14). (If possible, place
second clamp on bar from opposite side of
jig saw).
5. Remove guide pin from end of guide, push
pin through proper hole provided in guide,
then into center hole of workpiece (Fig. 16).
– When used with a Bosch JS572 jig saw or
the GST18V-50 / GST18V-50B & GST18V-
60C / GST18V-60BC cordless jig saw, the
holes labeled for the JS572 should be
used.
– For other jig saws, one of the other holes
should be used.
6. Measure the distance from the center of the
hole to the desired circle radius. Adjust that
measurement as necessary to account for
the width of the blade:
– When cutting a hole, cut from inside the
intended radius.
– When cutting wheels or discs, cut from
the outside the intended radius.
7. Hook clamp(s) onto footplate, and position
the guide to that adjusted radius measure-
ment.
8. Place lock knob(s) on proper side of
clamp(s) and securely tighten lock knob(s)
on the clamp(s) (Fig. 13).
9. Insert battery pack onto jig saw, hold the saw
firmly, squeeze trigger (GST18V-50 model
only) or slide the on/off switch forward into
the "on" position (GST18V-50B model only)
and slowly push the saw forward (Fig. 16).
160992A88D GST18V-50 B 202302.indd 19
Operating Tips
Fig. 15
CIRCLE-CUTTING TIPS:
• Place small wedges in the cut as shown in Fig.
16, to keep the inner circle from spreading
when near the end of the cut.
• Use a thick jig saw blade, such as the Bosch
T101TP or T144DP whenever possible.
• Make sure that the jig saw's orbital setting is
at 0 (zero).
• Cut slowly so the blade will stay straight in
the cut.
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Fig. 16
Wedge
Center Pin
2/14/23 10:53 AM