Читать книгу The Handyman's Book of Tools, Materials, and Processes Employed in Woodworking - Paul N. Hasluck - Страница 160

When an oilstone becomes uneven with wear it is necessary to level it. This may be done by glueing or tacking a sheet of glasspaper on a level board and rubbing the stone on the glasspaper. If the stone is of a very hard nature, emery cloth may be used. If the cloth is tacked down it can be taken up frequently and well shaken or beaten on the back to get rid of the oilstone dust, and so doing lengthens the life of the emery cloth. Another method is to use fine sand and water sprinkled on a level iron plate or sheet of glass, emery powder being used instead of the sand for hard stones. The face of the stone is rubbed on the metal or glass, the grit and water being replenished as required. This leaves a smooth and even surface. Some workmen level the stone with an old file, or hold it on the side of a revolving grindstone. The “strickle” method, described below, has just the same effect as emery cloth has, with, however, more trouble. Some workers will use no other method, however. An emery strickle is used by carding engine minders in cotton and woollen mills, from whom they can be obtained. For the benefit of those who cannot get an old strickle, make a substitute as follows: To (say) one gill of hot glue add about a dessert spoonful of ordinary glycerine, stirring well, and keep the mixture hot. Get a pine board 1 in. thick, from 4 in. to 6 in. wide, and any length up to about 2 ft., and having planed one surface true, and bored a 1/2-in. or 5/8-in. hole to hang it up by, lay it face upward upon a large sheet of paper. Coat the board with the hot glue, rubbing it in well and evenly with the brush, and at once cover quickly with a thick layer of coarse emery; pat this down all over with the flat of the hand; raise the board, shake off the superfluous emery, and give the board a smart rap or two on the bench or table top. Then put aside in a warm, dry place for twelve hours, and repeat the glueing, and covering with emery on the top of the first coat. Rap off all the loose emery, and again put aside to dry. Finally, give the surface a thin coat of boiled oil (with or without the addition of a little black paint), taking care that the interstices between the emery grains are well filled. It will be dry in two or three days, and then will be found to be a most effective appliance for keeping oilstones level.

Fig. 446.—Section of Cased Oilstone.

Fig. 447.—Section of Oilstone Case showing Points.

Fig. 448.—Section of Oilstone Case showing Rubbers.

Fig. 449.—Bench Oilcan.