JB/T3411.77-1999 This standard is a revision of JB 3487-83 "Tool bar dimensions for chip countersink drills". 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 tool bars for chip countersink drills. JB/T 3411.77-1999 Tool bar dimensions for chip countersink drills JB/T3411.77-1999 Standard download decompression password: www.bzxz.net

ICS25.080.01
Mechanical Industry Standard of the People's Republic of China
JB/T3411.77-1999
Arbor dimensions for tip type countersink drills
Arbor for tip type countersink drill Dimensions
Published on 1999-05-20
National Bureau of Machinery Industry
Implementation on 2000-01-01
Mechanical Industry Standard of the People's Republic of China
Arbor for tip type countersink drill Dimensions
This standard specifies the types and dimensions of arbors for tip type countersink drills. 2 Reference standards
JB/T3411.77—1999
Replaces JB3487—83
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards GB/T1443-1996 Self-clamping cone for machine tools and tool handles GB/T1451985
3 Types and dimensions
Center hole
Types and dimensions are as specified in the following figures and tables. Zhenshi Circle Restaurant
Approved by the State Machinery Industry Bureau on May 20, 1999
Implemented on January 1, 2000
Cone No.
28, 30, 32
37, 39, 42
31, 33, 35
37, 39, 42
43, 45, 48
50, 52, 56
JB/T3411.77—199 9
Note: The size and deviation of Morse taper shall be marked in accordance with the provisions of GBT1443. 4
Marking example:
Morse taper No. 4, b-8mm, d-28mm, blade countersink drill tool holder: tool holder
4-8X28JB/T3411.77—1999
blade countersink drill
54, 55
60, 62
66, 72, 84
84, 9 6, 98
2X center filling A
CB/T145-1986A
Basic size
Limit deviation t7
110 yuan
JB/T3411.77—1999
Appendix A
(Appendix of prompt
Sheet type countersink drill
0.2~~0.3 margin
Basic size
Note: The blade is a reverse cone of 0.06~0 .07mm.
Limit deviation 19
Basic size
Other academic
Marking example:
D.-65mm, B-10mm
Sheet hole drill:
Second hole drill 65×10
Technical requirements:
1Material: W18Cr4V
2.62-65HRC.
3. Blade shape of sheet countersink drillWww.bzxZ.net
0.06 - 0.07 mm
Limit deviation
Mechanical industry standard
Tool bar dimensions for countersink drill
JB/T 3411.77-1999
Published by the Machinery Standardization Research Institute of the Ministry of Machinery Industry Printed by the Machinery Standardization Research Institute of the Ministry of Machinery Industry (No. 2 Shouti South Road, Beijing: Postal Code 100044)*
Book size 880×1230
X number of characters xXX,XXX
Sheet X/X
Xth printing in XX month, 19XX
Xth edition in XX month, 19XX
Number of prints 1-XXX
Price XXXXX Yuan
XX-XXX
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