Tacker Tip for hand welding when used with any of the 40s Series and FUSION Series welders. Applications for the KT tip are as follows: For a temporary weld having sufficient tensile strength to hold plastic pieces together until further welding is performed to complete the part or product being produced; For correct alignment of the plastic pieces being tacked into place prior to speed welding to yield the finished product and For use prior to generating permanent welds on the particular structure being fabricated.

OD = 0.54

ID =   0.41

Tack welding is a shallow fusion of the mating surfaces of the material. It possesses little tensile strength. It holds the pieces

together until the regular bead is welded. Tack welding eliminates the need for clamps, jigs and additional manpower.

For practice welding, prepare the material as follows:

1. Take two pieces of 1/8” thick PVC sheets, each about 2” wide by 6” long. Bevel one of the long edges of each piece to

about 30º for a total included angle of 60º. Do not bevel to a feathered edge.

2. Remove all dust and chips. Do not use a solvent. This will soften the material and result in a poor weld.

3. Clamp one of the beveled pieces flat on a work bench with the bevel pointed upward. Place the other pieces so that the

beveled edges face each other. Install the tacker tip. Hold the welder upright at an angle of about 80º perpendicular to

the surface of the material.

4. Hold the loose PVC piece firmly against the clamped piece. Touch the point of the tacker tip quickly but firmly along the

mating surfaces, making short (½” to ¾”) tacks at intervals of about 1 ½ to 2” along the joint.

5. Then draw the point of the tacker tip along the entire joint, fusing the edges together. This operation must be

performed quickly. Hesitation at any point can result in charred spots that must be removed before further welding.

The two pieces are now fused together with sufficient strength for handling.