The recommended operational speed is 4700 RPM plus or minus 50 RPM. This typically is the highest speed of a drill press with four sheaves on the drive pulleys. At this speed the "Rotary Planer" runs very smoothly. Operating at lower speeds can cause vibration and chattering to occur due to the frequency of the contact of the three blades, and poor results.
When Planing a piece of wood, care should be taken to keep force down on the wood to keep it firmly on the drill press table. If the wood is allowed to drift up from the drill press table while it is under the "Rotary Planer" it can cause the blades to cut into the surface of the wood, causing divots in the surface resulting in an uneven surface.
The maximum depth of the cut with this "Rotary Planer" is 1/8 of an inch, which is the height of the step in the casting opposite the edge of the blades. No attempt should be made to make a cut in the wood deeper than 1/8 of and inch. Shallower cuts, of course, can be made as desired.
The best way to begin planing a piece of wood is to start the wood into the rotor turning toward the wood so the wood has a slight push toward the operator rather than a slight pulling of the wood away from the operator. This could cause a lack of control.
Large expensive planners typically can not plan wood shorter than 7 inches long. This "Rotary Planer" can cut wood that is as short as 4 inches long, but care must betaken to hold the wood so that there is no risk of hands being contacted by the whirling blades of the rotor.
With boards less than 3 feet long the table of the drill press will be adequate to plane wood wit this "Rotary Planer". Longer boards may work better with a longer wooden table top made up and bolted to the existing table of the drill press table, but it is not required.