Читать книгу The Handyman's Book of Tools, Materials, and Processes Employed in Woodworking - Paul N. Hasluck - Страница 162

Emery oilstones have been made for the last twenty-five years, but until quite lately they were too poor in quality to come into general use. The Whelden emery oilstone is manufactured from Turkish emery, one face being of fine and the other of medium coarse material. The coarser side is very fast cutting, and on it a 2-in. plane iron about 1/32-in. thick at the edge has been sharpened to a fine cutting edge in three minutes, as against seventeen minutes on a good Washita stone and thirty-six minutes on an Arkansas stone. The coarse side leaves the tool in about the same condition as a good Washita stone, and the fine side in about the same condition as a fine Turkey or soft Arkansas, better than a Washita, but not so fine as a good hard Arkansas. The emery oilstone has the advantage over any natural stone that it is quite uniform in texture, there being no hard or soft spots, cracks or fissures. They are not brittle, and can be dropped a reasonable distance without breaking. The stock size is the No. 10, which is 8 in. long, 2 in. wide, and 1 in. thick, but the makers advise the use of Nos. 12 and 15, the former being 8 in. long, 1 3/8 in. wide, and 1 3/8 in. thick, and the latter 2 in. wide and otherwise the same as No. 12. The lubricant used with these stones is water or paraffin, and therefore iron cases are preferable to wooden ones. All the usual shapes of slips, etc., are made in this emery stone.