JB/T 3411.78-1999 Countersink Drilling Tool Arbor Dimensions

JB/T3411.78-1999 This standard is a revision of JB 3488-83 "Counter-sinking drill bar dimensions". Only the following points were modified during the revision, and the main technical content remained unchanged: - Writing format; - Standard name plus English; - Relevant reference standards and related content; - Thread drawing method. This standard specifies the type and size of counter-sinking drill bar. JB/T 3411.78-1999 Counter-sinking drill bar dimensions JB/T3411.78-1999 Standard download decompression password: www.bzxz.net

IC.5 25.080.01
Machinery Industry Standard of the People's Republic of China
JB/T3411.67~3411.82-19
Accessories of drilling machines
Accessories of drilling machines1999-05-20 IssuedbZxz.net
State Machinery Industry Bureau
2000-01-1 Implementation
■ Scope
Machinery Industry Standard of the People's Republic of China
Arbur fur reverse cuuu[ersink Drill Dianccnsions
This standard specifies the types and sizes of drill dies. 2 Referenced standards
JB/T3411.78—1999
JB348R—8.3
The following standards contain all the clauses, which are cited in this standard and become the records of this standard. When the standard is published, all versions are valid. All standards will be revised. The provisions of this standard should be used for new vehicles: GRT144? E99G (bed and workpiece with convex clamp type and size
Type and size below and table provisions. 4 mark
mark mark:
Mo Liuji No. 3, [3mm, D, 15mm countersunk hole purple rod: rod 313×152411.78--1
Qi Shi Guochang
Figure Home Machinery Industry Bureau 1999-0 5-20 approved
2000-01-0 implemented
use confirmed and based on 4
can be fake production
114177
Zhao limited thank you
11713411.78-1999
Station people
hard elimination difference
magnetic limit difference
model positive bias
- 0 027
lack of limit difference
JB/13411.78—1999
table (complete)
In addition: Fei Yafeng's knowledge of the current competition degree GT44, 26
limits are registered
investment limit difference
JB/T 3411.7H—19
Appendix A
(Suggested Appendix]
Counter-sinking hole station
.5×a5
Marking example:
=12mm, 19mm hole station
Counter-sinking 42×19
Technical requirements
1Material: Wi8r4Y
2Heat treatment: 62-65HRC
3Performance: 0.06--0.mm
Relative limit benefit
[BTUT81905
7.0 8.0 : 1.2
Basic size
Glass limit deviation
566 23
726 92
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