Document R2JbvJ2mBE1kQVkRbreEev2yn

Cutter jaws should have the hardness speci fied by the manufacturer for the particular kind of material to be cut By adjustment of the bumper stop behind the jaws, cutting edges should be set to have a clearance of 0003 m when closed Wood-cutting tools Edged took should be used so that, if a slip should occur, the direction of force will be away from the body For efficient and safe work, edged tools should be kept sharp and ground to the proper angle A dull tool does a poor job and may stick or bind A sudden release may throw the user off balance or cause his hand to strike an obstruction Dress ing of wood-cutting tools is covered earlier m this chapter Wood chisek. Inexperienced employees should be instructed in the proper method of holding and using chisels Handles should be free of splinters The wood handle of a chisel struck by a hammer or mallet should be protected by a metal or leather band to prevent its splitting The work to be cut should be free of naik to avoid damage to the blade of the chisel Should metal be struck by the cutting edge, a chip from the chisel might fly The wood chisel should not be used as a pry or a wedge The steel in a chisel is hard so that the cutting edge will hold, and is there fore brittle enough to break if the chisel is used as a pry When not m use, the chisel should be kept in a rack, on a workbench, or m a slotted secbon of the tool box so that the sharp edges will be out of the way Saws should be selected for the work they must do For cutting across the gram of the wood, use a crosscut saw, for cutting with the gram, a ripping saw The difference be tween them is their teeth angle For fast crosscut work on green wood, use a coarse saw (4 to 5 points per inch), for smooth, accurate cutting of dry wood, use a fine saw (7 to 8 points per inch) Points per inch is stamped on the heel of a saw Saws should be kept sharp and the teeth kept well set to prevent binding When not in use, saws should be kept in racks or hung by the handle to prevent the teeth from being dulled A Teflon-coated saw is available that minimizes binding Axes. To use an axe safely, workmen must be taught to lift it properly, to swing correctly, and to place the stroke accurately The proper gnp for a nght-handed person is to have the left hand about 3 in from the end of the handle, and the right hand about three-fourths of the way up A left-handed person should reverse the position of the hands A narrow axe with a thin blade should be used for hard wood, and a wide axe with a thick blade for soft wood A sharp, wellhoned axe yields better chopping speed and is much safer to use because it bites into the wood (Fig 35-9) A dull axe will often glance off the wood being cut and may strike the user in the foot or leg An axeman should make sure that he has a clear circle in which to swing his axe before he starts chipping Also, he should remove all vines, brush, and shrubbery within the Fic 35-9 --Good honing saves labor and makes an axe safer to use The axe should be honed after each sharpening and each use Correct honing motion is shown here 985