Lincoln Electric 450, 250 Contact TIP and GAS NOzzLE Installation, Connection to hOBART Feeders

B-4 INSTALLATION B-4

CONTACT TIP AND GAS NOzzLE INSTALLATION

a.Choose the correct size contact tip for the electrode being used (wire size is stenciled on the side of the contact tip) and screw it snugly into the gas diffuser.

b.Slip the appropriate gas nozzle onto the diffuser. The proper nozzle should be selected based on the welding application. Different length nozzles are available to fit 250, 350, 450 and 550 amp gun tubes to allow either spray or short-circuiting trans- fer welding.

Choose the gas nozzle as appropriate for the GMAW process to be used. Typically, the contact tip end should be flush to .12” (3.1 mm) extended for the short-circuiting transfer process and .12” (3.1

mm)recessed for spray transfer. For the Outershield (FCAW) process, 1/8” (3 mm) recess is recommended.

CONNECTION TO FEEDER

CONNECTION TO LINCOLN FEEDERS

Gun cable assemblies which were assembled with a K466-1 or -8 Connection Kit will connect easily to any Lincoln LN-7, LN-8, LN-9 or LN-25 feeders.

a.Check that the drive roll(s) and feeder guide tubes are appropriate for the electrode size being used.

b.Fully push the brass connector end of the gun cable into the conductor block on the outgoing side of the feeder wire drive. Secure the cable using the hand screw or set screw in the conductor block.

c.Insert the control cable plug from the feeder trigger circuit into the mating socket on the feeder end cable handle (See K466-1 Installation Section.)

d.Slide the free end of the flexible hose onto the barbed gas fitting on the front of the Lincoln feeder (See K466-1 or -8 Installation Section.) Move the corresponding tubing clamp down near the end of the tube to assure a good gas seal.

CONNECTION TO ADAPTED FEEDERS

Gun cable assemblies which were assembled with a K466-2 Connection Kit will connect easily to any prop- erly adapted feeder.

a.Check that the adapter and feeder outgoing guide, as well as the drive roll, are appropriate for the elec- trode size being used.

b.Fully push the brass connector end of the gun cable into the brass adapter on the outgoing side of the feeder wire drive. Secure the cable using the hand screw or set screw in the adapter.

c.Insert the control cable plug from the feeder trigger circuit into the mating socket on the gun cable con- nector handle .

CONNECTION TO MILLER FEEDERS

Gun and cable assemblies which were assembled with a K466-3 Connector Kit will connect easily to a variety of popular Miller wire feeders.

a.Check that the gun liner, connector cap liner, drive rolls and guide tubes are appropriate for the elec- trode size being used.

b.Fully push the brass connector end of the gun and cable into the connector receptacle on the outgoing side of the feeder wire drive. Tighten the hand screw to clamp down on the connector.

c.Insert the control cable plug from the feeder trigger circuit into the mating socket on the gun cable con- nector handle.

CONNECTION TO hOBART FEEDERS

Gun and cable assemblies which were assembled with a K466-4 Connector Kit will connect easily to a variety of Hobart wire feeders.

a.Check that the gun liner, connector cap liner, drive rolls and guide tubes are appropriate for the elec- trode size being used.

b.Fully push the brass connector end of the gun and cable into the connector receptacle on the outgoing side of the feeder wire drive. Tighten the hand screw to clamp down on the connector.

c.Insert the control cable plug from the feeder trigger circuit into the mating socket on the gun cable con- nector handle.

d.Slide the free end of the flexible hose (mounted to the gun in K466-4 Installation Section) onto the gas fitting on the Hobart wire feeder. Move the corre- sponding tubing clamp down near the end of the tube to assure a good gas seal.

MAGNUM® PRO 250, 350, 450 & 550 AMP