JB/T 7956.1-1999 1: 50 taper pin reamer Part 1: Hand reamer

JB/T 7956.1-1999 This standard is a revision of JB/T 7956.1-95 "Hand-held 1:50 taper pin reamer". During the revision, only editorial changes were made according to relevant regulations, and the technical content remained unchanged. This standard is part of the JB/T 7956 "1:50 taper pin reamer" series of standards. This series of standards includes the following three parts: JB/T 7956.1: Hand-held reamer JB/T 7956.2: Hand-held long blade reamer JB/T 7956.3: Taper shank machine reamer This standard specifies the type and size of hand-held 1:50 taper pin reamer. This standard is applicable to hand-held 1:50 taper pin reamer with a diameter of 0.6~50mm. This standard was first issued in 1984 as GB 1136-84 and was adjusted to JB/T 7956.1-95 in April 1996. JB/T 7956.1-1999 1:50 taper pin reamer Part 1: Hand reamer JB/T7956.1-1999 Standard download decompression password: www.bzxz.net

ICS25.100.30
Machinery Industry Standard of the People's Republic of ChinabZxz.net
JB/T7956.1~7956.31999
1:50 taper pin reamer
Published on 1999-05-20
National Bureau of Machinery Industry
Implementation on 2000-01-01
JB/T7956.1-1999
This standard is a revision of JB/T7956.1-95 (formerly GB1136-84) "Hand-held 1:50 taper pin reamer". During the revision, only editorial modifications were made in accordance with relevant regulations, and the technical content remained unchanged. This standard is part of the JB/T7956 "1:50 taper pin reamer" series of standards, which includes the following parts: JB/T7956.1--1999 1:50 taper pin reamer Part 1: Hand reamer JB/T7956.2--1999 1:50 taper pin reamer Part 2: Hand long blade reamer JB/T7956.3-1999 1:50 taper pin reamer Part 3: Taper shank machine reamer
This standard replaces JB/T7956.1-95 from the date of implementation. This standard is proposed and managed by the National Tool Standardization Technical Committee. The responsible drafting unit of this standard: Chengdu Tool Research Institute. The main drafters of this standard: Lu Fuying, Fan Scope
Mechanical Industry Standard of the People's Republic of China
1:50 taper pin reamer
Part 1: Hand reamer
This standard specifies the type and size of hand-held 1:50 taper pin reamer. This standard applies to hand-held 1:50 taper pin cutters with a diameter of 0.6~50mm. 2 Referenced standards
JB/T 7956.1-1999
Replaces JB/T7956.1-95
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. At the time of publication of this standard: the versions shown are valid. All standards are subject to revision, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T4248-1984 Technical conditions for hand-held 1:50 taper pin reamer GB/T4267-1984 Shank diameter and drive square head size for straight tree rotary tools 3
Type and size
3.1 The type of hand-held 1:50 taper pin reamer is as shown in Figure 1, and the size is given in Table 1. Type A
Key back blade
Note: The angle value in the figure is for reference only.
Approved by the State Machinery Industry Bureau on May 20, 19992
Implemented on January 1, 2000
Basic limit
1 Professionally produced sensitive knives are according to Type A.
2 The reamer with diameter d≤6mm can be made into a reverse tip
3 The deviation of the square head of the vehicle body shall comply with the provisions of GB/T4267. 3.2 Marking example
JB/T7956.1-1999
The marking of the hand-held 1:50 taper pin reamer with diameter d-20mm, length/=180mm, type A, is 1:50 chain degree pin reamer 20×180AJB/T7956.1-19994 Technical conditions
The technical conditions of the hand-held 1:50 taper pin reamer shall comply with the provisions of GB/T4248. 16
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.