Tolerances of the thread being cuted Dies presented in the catalogue are destined for cutting the most often occuring basic tolerances for the given k

Tolerances of the thread being cuted Dies presented in the catalogue are destined for cutting the most often occuring basic tolerances for the given kind of thread: for metric thread 6g, for threads UNC, UNF etc. 2A. We can produce the dies destined for the other tolerance zone if demanded, e.g. for metric threads: 4h for tight threads, 6e for threads under the thin galvanic coatings. 4.4. Variants of execution and their usage Kind of work Desti- nation Execution of thread Blade geometry properties Symbol of execution variant Die material Usage Machine High performance Cutted Without spiral face 800 HSS Constructional steel, cast steel up to Rm < 800 MPa With spiral face 0 N O CL 00 со HSS Steels as above, higher thread quality, for work with automatic lathe Lapped Without spiral face Ms HSS Brass, short chipping bronze With spiral face INOX HSSE Stainless steels, cast aluminium, spheroidal cast iron 4.5. Technological recommendations for machine dies Machining material Cutting speed m/min Cutting fluid Carbon constructional steels 4 - 8 Oil Free - cutting steels 8 - 12 Oil Carburizing steels 4 - 8 Oil, special oil Heat - treatable steels 3 - 6 Oil INOX steels 2 - 4 Special oil Grey cast iron 3 - 8 Oil, kerosene Short chipping bronze 15 - 25 Oil, special oil Long chipping brass 10 - 16 Oil Long chipping bronze 5 - 8 Oil, emulsion Short chipping bronze 7 - 11 Oil, emulsion Cooper 11 - 15 Oil, special emulsion Long chipping aluminium 12 - 18 Special oil, kerosene Cast aluminium 8 - 12 Special oil, kerosene Q 294 TECHNICAL INFORMATION 4.3.