BS ISO 3292:2016 pdf free download.Extra-long parallel shank twist drills.
BS ISO 3292 specifies the dimensions of extra-long parallel shank twist drills in the range of 2 mm to 14 mm diameter with an overall length range of 125 mm to 400 mm.
2 Normative references
The following documents, in whole or in part, are normatively referenced in BS ISO 3292 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 10899. High-speed steel two-flute twist drills — Technical specifications
3 Dimensions
See Figure 1 and Table 1.
4 Technical specifications
Unless otherwise specified, technical requirements shall comply with ISO 10899.
5 Designation
Extra-long parallel shank twist drills in accordance with BS ISO 3292 shall be designated by the following:
a) twist driII
b) a reference to BS ISO 3292, i.e. ISO 3292;
c) drill diameter, d, in millimetres;
d) overall length, 1, in millimetres.
EXAMPLE An extra-long parallel shank twist drill of diameter d = 10 mm and overall length I = 250 mm is designated as follows:
Twist drill ISO 3292 – 10- 250.