This standard specifies the dimensions and tolerances of Morse taper shank flat bottom countersinks with replaceable guide pins. GB/T 4261-2004 Morse taper shank flat bottom countersinks with replaceable guide pins GB/T4261-2004 Standard download decompression password: www.bzxz.net

ICS 25. 100. 30
National Standard of the People's Republic of China
CB/T 4261—2004
Recommended GR/T 4261-1934
Cuunterhores with morse taper shanks and detachable pilots (IS0 42071977.M0D)
2004-02-10 Issuedwww.bzxz.net
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China Standardization Administration
2004-08-01 Implementation
This standard adopts TS1207:1977 Chain link drill with replaceable guide (Text Version). Compared with 1S0)4207::$77, this standard has the following technical differences and editorial corrections: GB/T4261-204
In the hot standard [application document, TS296.15)4208 are replaced by (GI3/T1413, GD/T4266); [S0)4204 is deleted. Appendix A (Diamond taper shank flat bottom drill with series): - Cancel the tolerance - Chapter, the dimensions are listed in the table; added notation examples:
use the symbol "" instead of the decimal point, ":" instead of "this international standard"; delete the front of the international standard,
from the date of implementation of this standard, the recommended GB/T42611984 with replaceable guide pins and flat bottom pins. This standard has the following changes compared with GB/T4261--1334: the writing format is 11/11,1--200(I;
1: the footnotes of the symbols "" and "" are adjusted, and corresponding changes are made in Table 1: Table 1 is the same as 1S0420%, the drill code is deleted: the cutting diameter and the guide diameter are given in range segments, the commonly used cutting diameter, guide diameter and applicable screw selection specifications are listed in the appendix, the dimensions of which are in accordance with GB/T15 2.3—1988 GB/T152.4—1S8 has been adjusted. In the standard for surface material variation, Appendix A (common series of flat drill bits) has been added. Appendix A of this standard is an informative appendix. The China Machinery Industry Federation proposed this standard and the National Technical Committee for Tool Standardization was responsible for drafting this standard. Chengdu Institute of Technology was responsible for drafting this standard. The main authors of this standard are Shen Shiwu and Zuihe Jian. The previous publication of the standard replaced by this standard is: CI5/1426:·1984. 1 Scope
Flat bottom drill bits with replaceable guide pins
This standard specifies flat bottom drill bits with replaceable guide pins. 2 Normative references
08/T4261200 4
The clauses in the listed documents become the clauses of this standard through standard reference. For any referenced document of a certain period, all subsequent correction orders (excluding those with errors or revisions) are not applicable to this standard. However, the research conducted according to the agreement reached between the parties is to use the new version of these documents: the documents with no date are applicable to this standard. GR/T4252 Bottom specification for drilling technology. Standard conditions
G3/T4266 Conductive gauge for drilling (GBT4266-2004, FSO4208-1977.M01) 3 Dimensions
3.1 Dimensions and tolerances
Drilling is based on type dimensions and tolerances according to the drawings! As shown in Table 1, Figure 1 only illustrates the diagram of this standard and is not used as a design detail drawing. The dimensions of the button handle are specified in GB/T14: The dimensions of the guide cylinder are specified in GB/T4366. The diameter of the guide cylinder is d, = 24mm, and the guide cylinder with a diameter of 5.mm is marked with a flat bottom inscription: 34×15.5GB/T 4251—20M
Classic demasculine drill
Technical conditions for replaceable Morse polished flat bottom drills are in accordance with the specifications of GB/122, Appendix
(Informative Appendix)
Commonly used Morse taper shank flat bottom drills
GB/T 4261—2004
Table A, 1 gives the cutting diameter of the applicable low-end drill, that is, the applicable guide diameter or guide diameter. This size is applicable to the full addition. 1. GB/7152.31088 anti-slip for the stud of the fastener, GB/T152.4-198R fasteners with large angle head bolts and hexagonal head countersunk sockets, Table A.1 Cutting straight line guide post point diameter in millimeters for use with gland needles or gauges
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.