BS EN ISO 4230:2016 pdf download
BS EN ISO 4230:2016 pdf download.Hand- and machine-operated circular screwing dies for taperpipe threads — R series (Iso4230:2016).
BS EN ISO 4230 is a supplenient to ISO 2568 and Iso 4231 and specifies the dimensions of hand- and machine-operated circular screwing dies intended for production of taper pipe threads. R series, in accordance with ISO 7-1.
With the exception of the die 1/16. the general dimensions of these dies (diameter, thickness and fixing dimensions) are in accordance with ISO 2568 so as to permit the driving of hand-operated dies with the aid of the die stocks defined in that document.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 2568, Hand- and machine-operated circular screwing dies and hand-operated die stocks
3 Dimensions
The general dimensions are shown in Figurci. and given in Tab1e 1.
NOTE1 The v-groove, diameter D; and clearance holes are left to the manufacturer’s discretion.NOTE2 The thread lead of the screwing die will be calculated on the basis of two threads.
NOTE3 Tolerances:
for precision screwing dies:on D: f10;
on E: js12;
for non-precision screwing dies:
-on D and E: the tolerances are left to the manufacturer’s discretion.
4Marking
Dies in accordance with this International Standard shall be marked with the letter R, immediatelyfollowed by the designation of the thread.
EXAMPLE An R series taper thread screwing die with designation 3/4 is marked as follows:
R 3/4
Where tools comply in all respects with the relevant International Standards, the Symbol lSo may beappended to the mark at the discretion of the manufacturer.
