Jet Tools J-4401A, J-4400A Operating instructions, Belt sander, Adjusting the belt sander table

6.0Operating instructions

These sanders can be used to remove stock from a wide variety of machinable materials. Different materials require different grit types and grades to achieve the desired stock removal rate and surface finish. Please consult with your abrasive materials supplier for specific recommendations on the correct grit material and grade required for your specific needs.

When removing stock from soft materials (wood, plastic, etc.) these machines are typically called "sanders." When removing stock from hard materials (cast iron, steel, etc.) they are referred to as "grinders". The word "sander" is used, more-or-less consistently, throughout this manual. It refers to the machines and not the type of abrasive finishing being performed.

Before operating your sander, please read the basic instructions on safe machine usage on the preceding pages.

6.1Belt sander

The sanding belt must be in good condition, at proper tension, and tracking correctly, before doing any sanding, grinding or other abrasive machining operations. Refer to the section on Track Mechanism Maintenance if you have any problems with belt tension or tracking.

6.2Adjusting the belt sander table

You can tilt the table in a range between 20° upward and 45° downward. A single locking handle on the side of the table is used to lock and unlock the table to permit adjustment.

There are two positive lock stop positions: at 90° (that is, at a right angle to the platen) and at 45° downward (essentially 90° + 45° or 135° total to the platen.)

Never adjust the table angle while the sander is running. Always turn the motor off before adjusting the table angle.

To Tilt the Belt Sander Table:

1.Unlock the locking handle on the side of the table.

2.Using the pointer and scale, set the angle to any required angle between 20° upward and 45° downward.

3.Lock the lock handle.

To Tilt the Table to Exactly 45o:

1.Flip out the stop bracket (see Figure 20).

2.Unlock the locking handle.

3.Move the table until it contacts the stop bracket.

4.Lock the table lock handle.

Figure 1: Locking handle for belt table

6.3Using the indexing lock handle

The lock handle (Figure 1) is spring loaded and can be repositioned on its shaft to permit easy locking and unlocking.

To Reposition the Handle:

1.Pull outward against its spring.

2.Rotate the handle to the position you require.

3.Release the handle and its spring will return it to the correct operating position.

6.4Adjusting the belt sander arm

The arm which holds the sanding belt can be positioned at a full vertical position, a full horizontal position, or at any angle in between which is convenient to the type of sanding you are doing.

A positive stop mechanism is used to permit quick adjustment to the vertical or horizontal positions.

Never adjust the arm angle while the sander is running. Always turn off the motor before adjusting the arm angle.

To adjust to vertical:

1.Unlock both lock bolts. These are located under the arbor cover.

2.Move the arm to vertical until it contacts its stop.

3.Tighten both lock bolts, and replace arbor cover.

Figure 2: Lock bolts for belt arm

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