JB/T 7963.3-1997 This standard is equivalent to ISO 4875/Ⅲ-1978 "Metal Cutting Band Saw Blades Part 3: Characteristics of Various Types of Saw Blades". This standard will replace JB/T 7963.2-95 from the date of its entry into force. This standard specifies the types of various metal cutting band saw blades (hereinafter referred to as band saw blades) classified by manufacturing materials, and indicates the specifications and dimensions of various types of band saw blades according to the series specified in JB/T 7963.2-1997. The hardness and test methods of band saw blades shall be in accordance with Appendix A (suggestive appendix). JB/T 7963.3-1997 Metal Cutting Band Saw Blades Part 3 Types and Characteristics JB/T7963.3-1997 Standard download decompression password: www.bzxz.net

Machinery Industry Standard of the People's Republic of China
JB/T7963.1～7963.3-1997
Metal Cutting Band Saw Blades
Published on August 18, 1997
Ministry of Machinery Industry of the People's Republic of China
Implementation on January 1, 1998
JB/T 7963. 3—1997
This standard is equivalent to ISO4875/Ⅱ一1978 "Metal Cutting Band Saw Blades Part 3: Characteristics of Various Types of Saw Blades". Since the types, specifications and sizes of metal cutting band saw blades given in ISO4875/Ⅱ are basically suitable for domestic requirements, they are equivalently adopted. According to the market needs and production development at home and abroad in recent years, the 27 and 34 specifications are added to the "4.5 Bimetallic Band Saw Blade". According to the provisions of GB/T1.1-1993, the legal measurement units and codes of the national standard shall be used in the standard, so this standard only uses the metric dimensions and tolerances in ISO4875/!, and removes the imperial dimensions and tolerances. The code for the number of teeth per inch in the pitch is retained in brackets.
Appendix A of this standard is a prompt appendix, which is a combination of Appendix A and Appendix B of ISO4875/!. JB/T7963 is under the general title of "Metal Cutting Band Saw Blade", including three parts: Part 1 (JB/T7963.1); Definitions and terms: Part 2 (JB/T7963.3); Definitions and terms: Part 3 (JB/T7963.4); Definitions and terms: Part 4 (JB/T7963.5); Definitions and terms: Part 5 (JB/T7963.6); Definitions and terms: Part 6 (JB/T7963.7); Definitions and terms: Part 7 (JB/T7963.8); Definitions and terms: Part 8 (JB/T7963.9); Definitions and terms: Part 9 (JB/T7963.10); Definitions and terms: Part 11 (JB/T7963.11); Definitions and terms: Part 12 (JB/T7963.12); Definitions and terms: Part 13 (JB/T7963.13); Definitions and terms: Part 14 (JB/T7963.14); Definitions and terms: Part 15 (JB/T7963.15); Definitions and terms: Part 16 (JB/T7963.16); Definitions and terms: Part 17 ( 63.2); Basic dimensions and tolerances; Part 3 (JB/T7963.3): Types and characteristics. This standard was proposed and coordinated by the National Technical Committee for Tool Standardization. The main drafting units of this standard: Hunan Machine Tool Factory, Benxi Tool Factory. The main drafters of this standard: Xu Ziwen, Zhang Shuhua, Li Langgui, Deng Fang, this standard will replace JB/T7963.2~1995 "Types, specifications and technical requirements for metal cutting band saw blades (formerly GB6079.2-85) from the date of its entry into force.
JB/T7963.3-1997
ISO (International Organization for Standardization) is a worldwide alliance of national standards associations (ISO member groups). The formulation of international standards is generally carried out by ISO technical committees. . Each member body interested in a subject for which a technical committee has been established has the right to represent on that committee. International organizations (governmental and non-governmental) in liaison with ISO may also take part in the work. Draft international standards adopted by the technical committees are circulated to the member bodies for approval and then approved as international standards by the ISO Council.
International Standard ISO 4875/ was drafted by Technical Committee ISO/TC29 (Tools) and circulated to the member bodies in August 1976.
.This standard has been adopted by member bodies of the following countries: Australia
Belgium
Czechoslovakia
Sicily
Israel
Italy||tt ||Mexico
Romania
Republic of South Africa
The member bodies of the following countries have expressed their technical disagreement with this document; West Germany
Spain
Yugoslavia
1 Scope
Mechanical Industry Standards of the People's Republic of China
Metal Cutting Band Saw Blades
Part 3: Types and Characteristics
JB/T7963.3—1997
eqvISO4875/-1978
This standard specifies the types of various metal cutting band saw blades (hereinafter referred to as band saw blades) classified by manufacturing materials, and indicates the specifications and dimensions of various types of band saw blades according to the series specified in JB/T7963.2-1997. Band saw blade hardness and test methods, according to Appendix A (indicative appendix). 2 Referenced Standards
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. JB/T7963.1-1997 Metal Cutting Band Saw Blades Part 1: Definitions and Terminology JB/T7963.2-1997 Metal Cutting Band Saw Blades Part 2: Basic Dimensions and Tolerances 3 Band Saw Blade Types
3.1 Carbon Steel Band Saw Blades
Band Saw Blades made of low alloy steel with a carbon content higher than 1.0% and lower than 1.5% (m/m). The total content of manganese, silicon and chromium should not be less than 0.5% (m/m).
3.2 Medium Alloy Steel Band Saw Blades
Band Saw Blades made of steel with an alloy content between carbon copper and high-speed steel. That is: high carbon alloy steel (carbon content 0.8%~1.25% (m/m)) containing carbide-forming elements such as chromium, vanadium, molybdenum or tungsten, with a total content higher than 8% but lower than 14% (m/m). 3.3 High-speed steel band saw blade
Band saw blade made of high-speed steel. High-speed steel is an alloy steel containing carbide-forming elements such as chromium, vanadium, molybdenum or tungsten, with a total content of at least 14% (m/m) (excluding carbon).
3.4 ​​Double Gold Flag Band Saw Blade
Band saw blade with a cutting edge made of a material different from the back edge (usually high-speed steel) and docked to the back edge made of low-alloy steel. 3.5 Friction Band Saw Blade
Band saw blade made of fatigue-resistant steel, and cutting is performed by the heat generated by friction. [The main function of the saw teeth is to generate the required heat and inhale air to maintain combustion. Friction saws usually operate at speeds exceeding 40 m/s (8000 ft/min). Appropriate protective devices should be installed on the machine tool.
4 Specifications and dimensions
Tolerances are shown in JB/T7963.2-1997.
4.1 Specifications and dimensions of carbon steel, hard edge, flexible back edge band saw blades are shown in Table 1 Approved by the Ministry of Machinery Industry on August 18, 1997
Implementation on January 1, 1998
Width × thickness
3.15 × 0.63
4. 75X0. 63
6.3 × 0.63
8. 0 × 0. 63
9.5X0. 63
12.5 × 0. 63
16.0×0.80
19.0× 0.80
25.0×0.90
31.5×1.06
37.5X1.25
Oblique tooth pitch
JB/T7963.3--1997
Wave tooth pitch
Number of teeth/25
(Number of teeth/in)
For the specifications of carbon steel, hardened edge and tempered back edge band saw blades, please refer to Table 2. Table 2
(Width×Thickness)
4. 75×0. 63
6.3×0.63
9.5×0.63
12.5×0.63
16.0×0.80
19.0×0.80
25.0×0.90
Oblique tooth pitch
Wave tooth pitch
Number of teeth/25mm
(number of teeth/in)
JB/T7963.3-1997
4.3 The specifications and dimensions of alloy steel band saw blades in Table 3. Table 3
(width×thickness)
12.5×0.63
19.0×0.80
25.0×0.90
The specifications and dimensions of high-speed steel band saw blades are shown in Table 4. Size
(width×thickness)
19.0×0.86
25. 0×0. 90
31.5×1.06
4.5 The specifications and dimensions of bimetallic band saw blades are shown in Table 5. Size
(width×thickness)
19.0×0.80
25. 0× 0. 90
27.0×0.90
31.5X1. 06
34.0×1. 06
37.5×1.25
50.0×1.25
Number of teeth/25mm(number of teeth/in)
Normal tooth oblique tooth pitch
Number of teeth/25mm(number of teeth/in)
Normal tooth oblique tooth pitch
Number of teeth/25mm(number of teeth/in)
Wave-shaped tooth pitch
Hook-shaped tooth pitch
For the specified dimensions of friction band saw blades, see Table 6.
(width x thickness)
12.0×0.80
16.0×0.90
19.0×0.90
25.0×0.90
JB/T7963.3-1997
Normal tooth pitch
Number of teeth/25mam (number of discs/in)
Hardness test
JB/T 7963.3-1997
Appendix A
(Indicative appendix)
The hardness test of band saw blades is a special technology and can be carried out according to the following test methods: a) Vickers hardness test:
b) Surface Rockwell hardness 15N test;
e) Microhardness test.
Any reading obtained by the above method is converted into HRC equivalent hardness - Hardness of various types of band saw blades
-Use the approximate conversion table (see Table A1).
The hardness of the tooth edge of the band saw blades of carbon steel, medium alloy steel, high-speed steel and composite steel is higher than that of the saw blade body below the tooth groove. The hardness of the tip of the saw tooth shall not be less than 62HRC.
After heat treatment, the hardness of the saw blade body shall not be less than: a) For band saw blades made of carbon steel, hardened edge and flexible back edge, the hardness is 264HV (25HRC); b) For band saw blades made of carbon steel, hardened edge and tempered back edge, the hardness is 373HV (38HRC); c) For band saw blades made of medium alloy steel, high speed steel and composite steel, the hardness is 363HV (37HRC). A3
Hardness conversion table
See Table A1 for the hardness conversion method.
HV (98N scale)bzxZ.net
Note: 1) The listed hardness is for reference only and will be specified in subsequent documents. HR (15N scale)
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