JB/T 8045.2-1999 Machine tool fixture parts and components - replaceable drill bushings

JB/T 8045.2-1999 JB/T 8045.2-1999 Machine tool fixture parts and components Interchangeable drill sleeves JB/T8045.2-1999 Standard download decompression password: www.bzxz.net

ICS 25. 080. 01
Mechanical Industry Standard of the People's Republic of China
The parts and units of jigs and fixtures
The parts and units of jigs and fixtures1999-08-06Promulgated
State Machinery Industry Bureau
Implementation on 2000-01-01
Mechanical Industry Standard of the People's Republic of China
Parts and units of jigs and fixturesIntee hangeable bit holder
This standard specifies the replaceable drill sleeves with specifications greater than 0 to 85 mm. 2 Reference standards
JB/T 8045.2-1999
Replaces JB/T 8045.2-1995
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/T 699-1988
GB/T1298—1986
JB/T 8044—1999
JB/T 8045.5---1999
3 Size
Technical conditions for high-quality carbon structural steel
Technical conditions for carbon cable tool steel
Technical requirements for machine tool fixture parts and components
Drill sleeve screws for machine tool fixture parts and components
The sizes are shown in the figure and table below.
Reticulation #0.3
JB/T8045.5
Approved by the State Machinery Industry Bureau on 1999-08-06 258
Implemented on 2000-01-01
Basic size
>10 12
>12~15
>15 -18
>18 ~22
>22 26
>26 -30
>30 ~35
>35~42
>42 ~48
> 48 ~ 50
>50 ~55
>55 -62
>62-70
>70 78
>78-80
>80 -85
Limit deviation
Basic size
JB/T8045.2-1999
Limit deviationLimit deviation
110104
120114
130124
When used as a sleeve, the tolerance band of d is recommended as follows 10
Matching screw
JB/T 8045.5
Use the reamer specified in GB/T1132-1984 "Straight shank machine reamer" and GB/T1133-1984 (taper shank machine reamer). For H7 holes, take F7; for H9 holes, take E7. When reaming (expanding) other precision holes, the tolerance zone is selected by the design. 2 (expanding) sleeve marking example: d~12mm tolerance zone is E7, D-18mm tolerance zone is m6, H=16mm interchangeable (expanding) sleeve: bell (expanding) 12E7×18m6×16JB/T8045.2259
Technical conditions
JB/T 8045.2—1999wwW.bzxz.Net
Material: d≤26mmT10A according to GB/T1298: 4.1
d>26mm20 steel according to GB/T699.
4.2 Heat treatment: T10A is 58~64HRC: 20 steel carburizing depth is 0.8~1.2mm, 58~64HRC. 4.3 Other technical conditions are in accordance with JB/T8044. 5 Marking
5.1 Marking example:
d=12mm, tolerance band is F7, D18mm, tolerance band is k6, H=16mm replaceable drill sleeve drill sleeve 12F7×18k6×16JB/T8045.2—1999260
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