Miller Bobcat 260 User Manual

OM-286504 Page 64
12-9. Welding Lap Joints
1-1. Welding Lap Joints
≤ 30
°
≤ 30
°
1
1
2
3
1-2. Welding Groove (Butt) Joints
30
°
2
1
1/16 in.
(1.6 mm)
3
4
1-3. Welding T-Joints
≤ 45
°
1
2
1
3
2
1-4. Weld Test
2 3 in.
1/4 in.
3
2
1
2 3 in.
3
2
1
(51-76 mm)
(6.4 mm)
(51-76 mm)
1 Electrode
2 Single-Layer Fillet Weld
Move electrode in circular motion.
3 Multi-Layer Fillet Weld
Weld a second layer when a heavier fillet is
needed. Remove slag before making anoth-
er weld pass. Weld both sides of joint for
maximum strength.
12-10. Welding Groove (Butt) Joints
1-1. Welding Lap Joints
≤ 30
°
≤ 30
°
1
1
2
3
1-2. Welding Groove (Butt) Joints
30
°
2
1
1/16 in.
(1.6 mm)
3
4
1-3. Welding T-Joints
≤ 45
°
1
2
1
3
2
1-4. Weld Test
2 3 in.
1/4 in.
3
2
1
2 3 in.
3
2
1
(51-76 mm)
(6.4 mm)
(51-76 mm)
1 Tack Welds
Prevent butt joint distortion by tack welding
the materials in position before final weld.
Workpiece distortion occurs when heat is ap-
plied locally to a joint. One side of a metal
plate will curl up toward the weld. Distortion
will also cause the edges of a butt joint to pull
together ahead of the electrode as the weld
cools.
2 Square Groove Weld
3 Single V-Groove Weld
4 Double V-Groove Weld
Materials up to 3/16 in. (5 mm) thick can
often be welded without special preparation
using the square groove weld. However,
when welding thicker materials it may be
necessary to prepare the edges (V-groove)
of butt joints to ensure good welds.
The single or double V-groove weld is good
for materials 3/16 - 3/4 in. (5-19 mm) thick.
Generally, the single V-groove is used on
materials up to 3/4 in. (19 mm) thick and
when, regardless of thickness, you can weld
from one side only. Create a 30 degree bevel
with oxyacetylene or plasma cutting equip-
ment. Remove scale from material after cut-
ting. A grinder can also be used to prepare
bevels.

Miller Bobcat 260 Specifications

General

Brand	Miller
Model	Bobcat 260
Category	Welding System
Language	English