Annealing Weld, To anneal the weld | Grizzly T10499 instruction

Annealing Weld

When the blade ends are welded, the metal becomes hard and brittle, which is not suitable for a bandsaw blade that must continuously bend smoothly under stress.

To bring the weld strength and flexibility to accept- able levels for a bandsaw blade, the annealing process re-heats the weld area, then allows it to cool gradually.

To anneal the weld:

1.Place the blade in the clamps so that the weld is centered between the clamps.

2.Secure the blade by moving both clamp levers up.

3.Make sure the anneal strength switch is in the proper position for the width of the blade (refer to the charts in Step 8 on Page 9).

4.For Carbon Steel Blades: Rapidly press and release—DO NOT hold—the anneal but- ton (see Figure 18) until the weld zone turns a dull red color. Continue pressing the anneal button with decreasing frequency until the weld no longer glows.

Anneal

Strength Switch

Anneal Button

Figure 18. Annealing controls.

For Bi-Metal Blades: Rapidly press and release—DO NOT hold—the anneal but- ton until the weld zone starts to glow, then release the anneal button completely.

T10499/T10500 Blade Welder

5.Allow the blade to completely cool.

6.Remove the blade from the clamps.

7.Grind the weld flat on both sides so the blade will run smoothly on the bandsaw wheels.

Note: Make sure not to grind the teeth or blade body. Do not overheat the blade during grinding—this will weaken the blade.

8.For Bi-Metal Blades Only: Repeat Steps 3–5 (not Step 6).

9.Test the strength and flexibility of the weld by bending the blade in an arc (with the weld at the top of the arc) similar in size and shape of the bandsaw wheels. The blade should bend smoothly without any angles (see Figure 19).

Correct

Not Correct

Figure 19. Comparison of correct and incorrect

blade weld bends.

—If the blade does show signs of bending or breaking at the weld, use the blade shear to completely remove the weld and perform the Blade Preparation and Welding pro- cedures again that begin on Page 7.

10.Turnthe /OFFswitchOFF,thenDISCONNECT WELDER FROM POWER!

11.Thoroughly clean the welding clamps to remove debris, oily substances, or flash from previous welding operations. If necessary, lightly sand them with 120-grit emery cloth.

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