Also called surfacers, planers are used to dress and size rough-sawed lumber on one or more sides. They plane boards to an even thickness. Stock passes under or between cylindrical cutter heads with multiple knives. Planers are similar to jointers except that the cutter head is above, or above and below, the stock. The operator adjusts for the cut and then feeds stock into the in-feed side of the machine. The surface board is retrieved from the out-running end.
Safety Hazards of Power-Feed Electric Planers/Moulders
Automatic feeding mechanisms make this equipment less hazardous. However, operators' hands may be pulled into the cutting area, and can come in contact with the point of operation while adjusting blades. Operators' hands also may be pinched between the stock and in-running rolls, if the feed system is not properly guarded.
Point of OperationãContact with the cutter head may occur during blade adjustment or other maintenance activities.
In-running rollsãClothing, hair, or hands may be caught by and pulled into the automatic feed mechanism.
KickbacksãStock may be thrown back at the operator after being caught by the cutter head.
Flying objectsãWorkpiece, wood chips and splinters may be thrown by the cutting action.
Vibration (and noise) may be produced if the machinery is not anchored to, and insulated from, a solid foundation
Completely enclose belts and pulleys of line shaft with sheet metal or heavy mesh guards; guards must be used regardless of the location of the line shaft
Cover cutting heads with a metal guard or cage. The exhaust system may be integrated with the guard
Guard feed rolls with a wide metal strip or bar that will allow boards to pass but that will keep operators' fingers out.
Provide barriers at the loading and unloading ends to keep hands out of point of operation.
Install anti-kickback fingers on the in-feed side across the width of the machine.
Use a barrier or guardrail when the machine is running.
Stand back once the boards have been put through to avoid injuries from kickback and flying splinters.
Do not feed boards of different thicknesses. Thinner boards will be kicked back.