Jet Tools JBG-6A operating instructions Operation, Adjustments

Operation

A bench grinder is designed for hand-grinding operations such as sharpening chisels, screwdrivers, drill bits, removing excess metal, and smoothing metal surfaces.

A Medium Grain Abrasive Grinding Wheel is suitable for rough grinding where a considerable amount of metal must be removed or when obtaining a smooth finish is not important.

A Fine Grain Abrasive Grinding Wheel should be used for sharpening tools of grinding to close size tolerances because it removes metal more gradually for precision grinding and gives work a smooth finish.

Always use approved safety glasses or face shields! Failure to comply may cause serious injury!

Switch

The switch is located on the front of the grinder near the bottom. To turn the tool on, depress the rocker switch at the top near the word ON. To turn the tool off, depress the bottom part of the rocker switch near the word OFF.

Precautions

Before starting the grinder, turn the wheels by hand making sure they are clear of obstructions and that they turn freely. The tool rests and spark guards should not touch the wheel.

Turn on the grinder and allow it to reach full running speed before starting to grind.

Keep a steady, moderate pressure on the workpiece and keep it moving at an even pace for smooth grinding. Pressing too hard overheats the motor and prematurely wears down the grinding wheels. Note the original bevel angle on the item to be sharpened and try to maintain the same shape. The grinding wheel should rotate into the object being sharpened. Keep a tray filled with water and dip your work into in regularly to prevent overheating. Overheating can weaken metals.

Do not use the side of the grinding wheel; this puts dangerous stress on the wheel.

When the wheel becomes loaded of dull, use an approved grinding wheel dresser and dress the wheel face.

Keep the tool rest and spark guard to within 1/16" of the grinding wheel. See the Adjustment section to adjust.

Adjustments

Eye Shield Tilt Adjustment

1.Loosen lock knob (A1, Fig. 3).

2.Adjust eye shield to the desired tilt angle (A2, Fig. 3).

Spark Guard

As the wheel wears down, the spark guards must be re-adjusted to maintain a 1/16" distance.

To adjust:

1.Loosen two hex cap screws (B1, Fig. 3) with a 10mm wrench.

2.Slide the spark guard (B2, Fig. 3) to 1/16" distance from the grinding wheel surface.

3.Tighten screw (B1, Fig. 3).

Figure 3

Tool Rest

As the wheel wears down, the tool rests must be re-adjusted to maintain a 1/16" distance.

1.Loosen two hex cap screws (C1, Fig. 3) with a 12mm wrench.

2.Slide the tool rest (C2, Fig. 3) to a distance of 1/16" from the grinding wheel.

3.Tighten screws (C1, Fig. 3).

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