JB/T 3753-1999 JB/T 3753-1999 Dimensions of spindle end for 3:20 taper hole of jig boring machine JB/T3753-1999 Standard download decompression password: www.bzxz.net

ICS25.080.20
Machinery Industry Standard of the People's Republic of China
JB/T3753—1999
Spindle end dimensions of 3:20 taper holes for jig boring machinesWww.bzxZ.net
Published on May 20, 1999
National Bureau of Machinery Industry
Implemented on January 1, 2000
JB/T3753—1999
This standard is a revision of JB375384 "Spindle end dimensions of 3:20 taper holes for vertical jig boring machines". During the revision, only editorial changes were made according to relevant regulations, and the technical content remained unchanged. Appendix A of this standard is the appendix to the standard.
This standard replaces JB3753—84 from the date of implementation. This standard was proposed by the National Technical Committee for Standardization of Metal Cutting Machine Tools. This standard is under the jurisdiction of the Jig Boring Machine Branch of the National Technical Committee for Standardization of Metal Cutting Machine Tools. The responsible drafting unit of this standard is Kunming Machine Tool Co., Ltd. This standard was first issued in August 1984.
1 Scope
Machinery Industry Standard of the People's Republic of China
Spindle end dimensions of 3:20 taper holes for jig boring machines
This standard specifies the types and dimensions of the spindle ends and tool taper shanks with 3:20 taper connections. This standard applies to jig boring machines with 3:20 taper connections on the spindle ends. 2 3:20 taper holes on the spindle ends
2.1 See Figure 1 and Table 1 for the end types and dimensions. D
National Machinery Industry Bureau approved the spindle end type in Figure 1 on May 20, 1999
Replaced JB375384
Implemented on January 1, 2000
Cone hole number
JB/T3753-1999
1)m is the maximum allowable error from the locating surface D to the gauge measuring surface. 2 The structural type of slot B is shown in Figure 2
a Straight slot
Spindle end size
M64×4
M70×4
M80×4
Figure 2 Structural type of slot B
Not less than
b Fan-shaped slot
The structural type of type I and type II end slot B allows the use of straight slots or fan-shaped slots. 2.4 Marking example:
a) Spindle end type I, taper hole number Z40, marked as Z40: b) Spindle end type II, taper hole number Z40, marked as I-Z40. 33:20 Tool taper shank
3.13:20 Tool taper shank type and size See Figure 3 and Table 2. 2
Dimension number
Not less than
JB/T3753-1999
[(4°17°20°
Figure 3 Tool taper shank type
Table 2 Tool taper shank size
1)n is the minimum distance from the locating surface d to the gauge measuring surface Large tolerance 3.2 Marking example:
a) Type I, taper shank number is Z40, marked as Z40:70
b) Type II, taper shank number is Z40, marked as II-Z40. 0.65
not less than
Type II deviation
not less than
JB/T3753—1999
Appendix A
(Appendix to the standard)
Type and size of the small end of the tool taper shank
1 For the spindle structure with a pull rod device, the type and size of the small end of the tool taper shank connected thereto are recommended to be in accordance with the provisions of Figure A1 and Table A1. Al
Type of small end of tool taper shank
1 Size of small end of tool taper shank
Taper shank number
Mechanical industry standard
Jig boring machine
3:
Spindle end size of 20 taper hole
JB/T3753—1999
Published and distributed 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)*
2 Number of characters 1Q000
Format 880×12301/16 Printing sheet 1/2
First edition in July 1999
First printing in July 1999
Print number 1—500
Price 500 yuan
99-328
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