I NTERNATIONAL STANDARD I S 0 2940/1 1 974 (E ) /ERRATUM Published 1 977 1 2 1 5 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION MEX rlYHAPOllHAñ OPTAHII3AUHI no CTAHnAPTR3AUIIM ORGANISATION INTERNATIO[.]
I N T E R N A T I O N A L S T A N D A R D I S 2940/1 -1 974 ( E ) / E R R A T U M Published I N TE R N ATI O N AL O R G AN I Z ATI O N S TAN D AR D I Z ATI O N MEX r l Y H A P O l l H A ñ FOR OPTAHII3AUHI no M i l l i n g cutters mou n ted on cen tri n g arbors having a 7/24 taper 977-1 2-1 C T A H n A P T R A U I I M O R G AN I S ATI O N - Fi t ti n g dimensions E R R ATU M Page Su bcl au se , ford for = d= view at ri g h t o f d rawi n g ; sym m etry tol eran ce on 40, replace 60, replace 0,01 0, 02 by by b: 0,1 2; 0,2 Page Su bcl au se replace 4.2, vi ew a t ri g h t o f d rawi n g ; sym m etry tol eran ce on th e value 0, 02 by 0,2 25,7 : - I N TER N ATI ON ALE DE N O R M AL I S ATI O N Centring arbors I S 2940/1 -1 974 ( E ) I N T E R N A TI O N AL S TAN D AR D I S 2940/1 M i l l i n g cu tters m ou n ted on cen tri n g arbors h avi n g a 7/2 taper - F i t t i n g dimensions - Cen tri n g arbors M O D I F I C A T I O N TO FOR E WOR D The Member Bo d y fo r France having decided th at i t can accept th e fi n al versi on o f th i s I n tern ati on al Standard, th e name "France" sh ou l d be del eted f ro m th e fi n al parag raph o f th e Foreword and i n serted i n th e l i s t o f cou n tri es whose Member Bodies approved th e I n tern ati o n al Standard - - - - , : : t t Milling cutters mounted on centring arbors having a 7/24 taper - Fitting dimensions - Centring arbors Fraises surfacer e t surfacer et dresser, montage direct sur nez de broches conicité 7/24 Dimensions d'interchangeabilité - Mandrins de centrage First edition - 974-04-01 - - ~ PT 2940 1-74 FO R E WO R D I S (th e I n tern ati o n al Organization fo r Stan dardi zati on ) i s a worl d wi d e federati on of national standards i n sti tu tes ( I S Member Bodies) The work o f developing I n tern ati on al Standards i s carried o u t th rou g h I S Technical Committees Every Member Body interested i n a subject fo r wh i ch a Technical Com m ittee has been s e t up has the ri g h t t o be represented on th at Comm i ttee I n tern ati on al organizations, governmental and non-governmental, i n liaison w i t h I SO, also take part i n th e wo rk D raft I n tern ati on al Standards adopted b y th e Technical Committees are ci rcu l ated to th e Member Bodies fo r approval before th ei r acceptance as I n tern ati o n al Standards b y th e I S Council I n tern ati on al I SO/TC 29, Standard I S 2940/1 was Small fools, and ci rcu l ated t o drawn up by Technical Com m i ttee th e Member Bodies i n October 972 I t has been approved by th e Member Bodies o f th e fo l l o wi n g countries : The Belgium Israel Th l an d Czechoslovaki a I tal y Tu rkey Egypt, Arab Rep o f Poland U.S.A Germany Romania U.S.S.R Hung ary Sou th Afri ca, Rep o f India Swi tzerlan d Member Bodies of th e fo l l o wi n g cou ntries docu ment on technical grounds : Au stri a France Japan Sweden U n i ted Ki n g dom O I n tern ati on al Org ani zati on P ri n t e d i n S wi t z e rl a n d fo r Stan d ard i zati on , 974 expressed disapproval o f the IS I N TE R N ATI O N AL S TAN D AR D 2740 PT 1-74 2940/1-I974 4851 703 (E) 0035227 T Mi l l i n g cu tters m ou n ted on cen tri n g arbors having a 7/2 taper - SCOPE A N D Fi tti n g dimensions - Cen tri n g arbors F I E L D O F AP P L I C ATI O N This I n tern ati on al Standard lays d own th e fi tti n g dimensions fo r m i l l i n g cu tters m ou n ted on cen tri n g arbors having a 7/24 taper, and th e dimensions o f cen tri n g arbors i n ten ded t o faci l i tate cen tri n g o f th e cu tter o n th e spindle nose This I n tern ati o n al Standard applies b o t h t o cu tters w i t h inserted teeth, made f ro m h i g h speed s t e e l or w i t h brazed carbide tips, and t o cu tters equipped w i t h indexable carbide ti ps I t concerns : - fi rstl y, th e so-called “single purpose m ou n ti n g ” m i l l i n g cu tter, arbor located, t o be used w i t h a wel l -d efi n ed spindle nose having a 7/24 taper - secondly, th e so-called “d u al purpose m ou n ti n g ” m i l l i n g cu tter, arbor located, t o be used w i t h b o t h spindle nose No 50 and spindle nose N o 60 having a 7/24 taper The general fi tti n g dimensions are i n accordance w i t h 297 and i t s addendum R EFER EN CES I SO/R 297, I SO/R 1 7/24 tapers for tool shanks 01 , Technical drawings - Tolerances of form and of position drawings I S 2940/1 - I S O /R - I, - Part I : Generalities, symbols, indications on Milling cutters mounted on centring arbors having a 7/24 taper - Inserted tooth cutters \ I S 40 /1 - 74 ( E ) ~ O C E N TR I N G PT 1-7 -1 51 90 0035230 AR B O R S I TABLE Di m en si on s i n m i l l i m e tres For D1 spi n d l e d I 95 m a x 40 40 60 48 /2 N o 40 44.45 45 57.1 50 55 60 69.85 88.90 x 07.95 x x x The shape o f th e spigot o f th e arbor i s a t th e manufacturer’s discretion 7/24 tapers i n accordance w i t h I S O I R 297 and i t s addendum , except fo r th e l ocati on o f th e end o f taper w i t h respect t o th e gauge plane on wh i ch i s located diameter 4 FI TTI N G D I M E N S I O N S FOR MI LLI NG Fo r single purpose m ou n ti n g cu tters Ceeti on A - A 7/2 taper - O, C U TTE R S M O U N TE D O N C E N TR I N G A R B O R S H A V I N G A /2 TA P E R b I S0 2940 TABLE PT 1-74 2940/1-I974(E) Dimensions i n m i l l i m etres * 55 60 120, 22 60 60 177 22 0, 34 25,7 14 i ao 34 25,7 14 245 Dim en sion t represents the posi ti on al tolerance of the ax i s of the holes o f d i am e t e rd l Each o f the axes of th e fou r holes should be contained wi th i n a cyl i n d ri cal zone o f diameter t the axe s o f wh ich are i n th e tru e specified posi ti on (see 4.2 I S O /R 1 01) For d u al purpose m ou n ti n g cu tters m ou n ted on 7/24 spindle noses N o or 60 Secti o n A - 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