INTRODUCTION
The SP-9 and SP-10 Welding Gun is intended for use as part of a complete package for
control of gas shielded consumable metal arc welding. The package includes the SP-9
or SP-10 Gun and the CV-2 Control when used with a constant potential welder. When
arc spot welding is to be performed with a constant voltage welder, the CVS-2 Control
and the CVAS-2 Timer is used. The guns may be used with a constant current DC Welder
when the CC-2 Control is used. The WCP-1 Welder, a constant potential welder with a
built-in gun control, may also be used with these guns.
DESCRIPTION
The SP Welding Gun
Type SP-9 Welding Gun is designed for use with 1/16-inch to 3/64-inch diameter a-
luminum welding wire on one-pound spools, 0.035-inch to 3/64-inch diameter Type MS
21 mild steel welding wire on 1-1/2 pound spools, and 0.035-inch to 3/64-inch dia-
meter stainless steel welding wire on one-pound Spools. It can also be used with
10-pound spools of 3/64-inch diameter aluminum wire.
The SP-10 Welding Gun is designed for use with 0.020-inch and 0.030-inch diameter
aluminum welding wire on one-pound spools, 0.020-inch to 0.030-inch diameter Type
MS-21 mild steel welding wire on 1-1/2 pound spools, and 0.020-inch to 0.030-inch
diameter stainless steel welding wire on one pound spools.
The Welding Gun SP-9 and SP-10 are compact, light-weight units designed to give
dependable service over an extended period. All exposed parts of the gun are fully
insulated from welding voltage for operator safety and prevention of accidental
shorts. The distribution of weight and the cable and hose arrangement give excel-
lent balance which make the welding guns easy to handle in all positions. The total
weight of either welding gun (including a one-pound wire spool) is less than four
pounds.
Each welding gun consists primarily of a gun barrel housing with a removable tapered
nozzle, a mounting bracket with a shielding gas valve operated by the trigger, a
handle of high impact plastic which contains the wire drive motor, a protective
shield with electrode speed control, a plastic reel cover, a control cable, a welding
current cable, and a gas hose.
The tapered nozzle (Part 1 on Drawing 483A756)
is
held
by
a
nozzle holder (2) which is threaded to the gun barrel housing (3). A copper guide
tube (4) passes thru the gun barrel and is secured by a thumbscrew (5). Mounted with-
in the mounting bracket are a front guide bushing (6) and a rear guide bushing (7).
The mounting bracket also includes a ball type shielding gas valve operated by the
trigger (8) through a plunger. The trigger also actuates the weld switch (9). Pivoted
on the side of the mounting bracket is a swing arm (10) on which is mounted an idler
roll (11).