Jet Tools JWP-16OS owner manual Maintenance, General, Sharpening Knives

Maintenance

General

Inspect your planer each time before using. Check for the following conditions and repair or replace when necessary.

1.Loose mounting bolts.

2.Worn switch.

3.Worn or damaged cords and plugs.

4.Damaged V-belts.

5.Any other condition that could hamper the safe operation of this machine.

Buildup of sawdust and other debris can cause your machine to plane inaccurately. Periodic cleaning is not only recommended but also mandatory for accurate planing.

Close-fitting parts, such as the cutterhead slot and gibs, should be cleaned with a cloth or brush and non-flammable solvent, and free from clinging foreign matter.

Remove resin and other accumulations from feed rollers and table with a soft rag and non- flammable solvent.

Periodically check all the chains for proper tension and adjust accordingly if required.

Tip: If a foreign object nicks the knives, instead of throwing them away or trying to grind out the deep nick, simply stagger the knives in the head, moving one knife no more than 1/8" to the right and another knife no more than 1/8" to the left. The nick should no longer be noticeable.

The table should be kept clean and free of rust. Some users prefer a paste wax on exposed steel and cast iron surfaces. The wax provides a layer of protection as well as reducing friction between lumber and the table making cuts faster and smoother. Avoid any wax that contains silicone or other synthetic ingredients. These materials can find their way into lumber and can make staining and finishing difficult.

Another option is talcum powder applied with a blackboard eraser rubbed in vigorously once a week; this will fill casting pores and form a moisture barrier. This method provides a tabletop that is slick and allows rust rings to be easily wiped from the surface. Another important fact is that talcum powder will not stain wood or mar finishes as wax pickup does.

Sharpening Knives

It is recommended that knives be replaced they become dull or damaged.

If knives are to be reused, it is recommended that they be sharpened by a professional knife sharpener. Improperly sharpened knives can cause a number of defects to lumber and put unnecessary load on the motor and drive systems.

If you must sharpen the knives yourself, please take note of the following information:

Primary Grinding Angle – 40 degrees Secondary Grinding Angle – 42 degrees

The grinding angle has been determined by the factory to be the best compromise for planing a wide variety of wood types. In most cases, that angle will produce excellent results. If you choose to change the angle of your bevel, be sure to consult with a trained sharpener or with a reference book before you commit to changing the angle of bevel.

Figure 38

22