TB 9-3439-203/1
DEPARTMENT OF THE ARMY TECHNICAL BULLETIN
CONVERSION OF WELDING ELECTRODE HOLDER
(3439-238-1638) FOR SUPPLEMENTAL AIR-ARC
METAL CUTTING
Headquarters, Department of the Army, Washington, D.C.
18 May 1967
I . GENERAL
Paragraph
Page
SECTION
Purpose----------------------------------------------- 1
Scope-------------------------------------------------
Conversion and cutting materials ------------------------- 3
Reporting of bulletin improvements ----------------------- 4
II. CONVERSION OF COMMON TYPE ELECTRODE
HOLDERS
General
-----------------------------------------------
Fabrication procedure ----------------------------------- 6
III. C O N V E R S I O N OF COLLET TYPE ELECTRODE
HOLDERS
General
-----------------------------------------------
Fabrication procedure ----------------------------------- 8
Section I. GENERAL
1. Purpose. This bulletin provides technical in-
3. Conversion and
Cutting Materials. Items
formation for field units to convert common and
required to convert the holders may be acquired
collet type manually operated welding electrode
from parts available at most installations. The
holders for use as an air-arc cutting device. The
suggested parts consist of the following items:
a. A piece of copper tubing 6 to 12 inches long,
conversion of the holder is useful to accomplish
metal cutting and/or removing and repairing of
having an inside diameter of
to
inch.
weldments.
b. Drain cock to use as an air shutoff valve and
2 . Scope. Common clamp type
and collet
fitting(s) suitable for attaching it to the available
" s t u b - s a v e r " type manually operated welding
air hose.
holders, 3439238-1638, may be used as an effi-
c. Radiator hose clamp(s) for clamping the
cient air-arc cutting device by attaching a simple
assembled attachment to the holder.
d. Friction or electrical tape to bind the attach-
air tube to the holder in such a manner as to
direct a stream of air on the workpiece at the
ment to the holder and provide insulation against
point of electrode contact. Conversion procedures
electrical shock.
do not require modification of the holders and
e. If the above materials are not locally avail-
after the conversion has served its purpose the
able it may be necessary to requisition one or
parts may be removed and the holders quickly
more of the items listed in table 1, to complete
returned to its original state.
the conversion.
TAGO
1733A-May
250-475*-67