A NEW PRECISION TOOL FOR CYLINDER GAUGING.
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TN repair shops where engine overhauls _Litre carried out,it is important to be able to test the cylinder bores to determine accurately the amount of wear from true circularity prior to regrindmg or lapping, if necessary. A new mieronieter,. produced bythe Goodell Pratt 'Co., of Greenfield, Mass., U.S.A., manufacturers of precision tools, is made. for this purpose. It is a barrel-type inside micrometer-with a range ofHorn 2'ins. to 5 use. . It has a long hollow -handle, which bads the adjustingrods for bores ot various diameters, and the readings are obtained in thousandths.of an inch direct. The acbracy a the
,micrometer' can be always maintained by adjusting the hardened steel anvil provided in the end of' each rod. The manufacturers are the Goodell Pratt 130, Queen Victoria Street, London, E. 0.4.