Work Setup, Blade Break-in Procedures | Jet Tools J-7040, J-7020

A minimum of three teeth should be on the work piece at all times for proper cutting. The blade and workpiece can be damaged if the teeth are so far apart that they straddle the workpiece.

For very high production on cutting of special mate- rials, or to cut hard-to-cut materials such as stainless steel, tool steel, or titanium, you can ask your industrial distributor for more specific blade recommendations. Also, the supplier who provides the workpiece material should be prepared to provide you with very specific instructions regarding the best blade (and coolant or cutting fluid, if needed) for the material and shape sup- plied.

Blade Break-in Procedures

New blades are very sharp and, therefore, have a tooth geometry which is easily damaged if a careful break-in procedure is not followed. Consult the blade manufacturer’s literature for break-in of specific blades on specific materials. However, the following proce- dure will be adequate for break-in of JET -supplied blades on lower alloy ferrous materials.

1.Clamp a round section workpiece in the vise. The workpiece should be 2 inches or larger in diameter.

2.Set the saw on low speed. Start the cut with a very light feed rate.

3.When the saw has completed 1/3 of the cut, in- crease the feed rate slightly and allow the saw to complete the cut.

4.Keep the same hydraulic cylinder setting and begin a second cut on the same or similar workpiece.

5.When the blade has completed about 1/3 of the cut, increase the feed rate. Watch the chip formation until cutting is at its most efficient rate and allow the saw to complete the cut (see Evaluating Blade Effi- ciency). The blade is now considered ready for regular service.

Work Setup

Securing the Workpiece for Square Cuts

1.Raise the saw head (refer to Figure 5).

2.Slide the left vise jaw far enough to the left to allow the workpiece to be placed in the vise.

3.Place the workpiece on the work table. If the workpiece is long, provide support at the other end. It may also be necessary to provide additional down- ward clamping to hold the workpiece securely on the work table.

4.Turn clamping hand wheel clockwise to clamp the workpiece in position against the fixed (right) vise jaw.

5.After completing the cut, turn the clamping hand wheel counterclockwise and slide the left jaw away from the workpiece.

Clamping
Hand
Wheel		Saw Head
	Left Vise Jaw	Saw Head
	Left Vise Jaw
Work Table

Figure 5: Securing workpiece

Adjusting the Vise for Angle Cuts

1.Referring to Figure 6, loosen the angle locking screw and the pivot screw on the left vise jaw.

2.Turn the locking handle on the round, angle-setting block counterclockwise to unlock the block. Slide the block until the pointer on the block is aligned with desired angle (see figure 7). Tighten the lock- ing handle to set the angle.

3.Set the workpiece in the vise. Put the front end of the workpiece against the corner of the right vise jaw. Put the rear end of the workpiece against the angle-setting block.

4.Turn clamping hand wheel clockwise until the left vise jaw is parallel with the workpiece. Tighten the pivot screw and angle locking screw on the left vise jaw. Clamp the workpiece in position.