GB/T 9217-1988 Technical Specifications for Carbide Rotary Files GB/T9217-1988 Standard Download Decompression Password: www.bzxz.net

National Standard of the People's Republic of China
Hardmetal burrs
Technical conditions
Hardmetal burrs--Technical specificatiansGB 9217 ---88
This standard refers to the international standard ISO7755/1-1984 "Hardmetal burrs--Part 1: General technical conditions".
1 Scope of application
This standard applies to:
GB9206--88 "Hardmetal cylindrical burrs" GB9207--88 "Hardmetal cylindrical ball-end burrs" GB9208-88 "Hardmetal spherical burrs", GB9209-88 "Hardmetal elliptical burrs", GB9210-88 "Hardmetal arc-shaped round-end burrs" GB9211--88 "Hardmetal arc-shaped pointed burrs", GB9212-88 "Carbide Torch-Shaped Rotary Files", (GB9213-88 "Carbide 60° and 90° Conical Rotary Files", GB9214-88 "Carbide Conical Round Head Rotary Files". GB9215-88 "Carbide Conical Point Rotary Files" GB9216-88 "Carbide Inverted Conical Rotary Files". 2 Code Usage Rules || tt || The code of the carbide rotary file consists of a group of letters and numbers arranged in the specified order, with a total of 6 symbols, representing the characteristics of the rotary file:
a. Symbol for the type of rotary file (see Table 1) - position 1; b. Symbol for the diameter of the cutting part - position 2; The digital symbol is the numerical value of the diameter of the cutting part in millimeters, and a 0 (Cen) must be added before a digit. Example: The diameter of the cutting part is 6mm -
The symbol is 06;
c. The symbol for the length of the cutting part -
position 3;
The digital symbol is the numerical value of the cutting part length in millimeters (excluding decimals). A 0 (zero) must be added before the single-digit value. Example: The cutting part length is 2.7mm - the symbol is 02; the symbol used for the tooth type
position 4 (see Table 5);
e. The symbol used for the shank diameter position 5 (see Table 2); f. The symbol used for the shank length
position 6;
The digital symbol is the numerical value of the shank length in millimeters (excluding decimals). Examples of rotary file codes:
Approved by the State Machinery Industry Commission on May 12, 1988, and implemented on January 1, 1989
Indicates that the rotary file is cylindrical (Type A)
Indicates that the diameter of the cutting part of the rotary file is 10 mm
Indicates that the length of the cutting part of the rotary file is 20 mm
Indicates that the tooth type of the rotary file is medium teeth
Indicates that the shank diameter of the rotary file is 6 mm
Indicates that the shank length of the rotary file is 40 mm
Names, types and symbols of carbide rotary files GB9217---88
The names, types and symbols of carbide rotary files are shown in Table 1. Table 1
Cylindrical rotary file
Cylindrical ball-end rotary file
Spherical rotary file
Elliptical rotary file
Arc-shaped round-end rotary file
Arc-shaped pointed rotary file
Torch-shaped rotary file
Character symbol
60°\\Conical rotary blanket
90°conical rotary file
Conical round-end rotary file
Conical pointed rotary file
Inverted conical rotary file
4 Dimensions and deviations
GB 9217.88
Continued Table 1
4.1 The numerical symbols for the diameter and length of the shank shall be in accordance with Table 2. Table 2
Numerical symbol
Shaft diameter
Note: ① The values ​​in brackets should not be used as much as possible. () The length of the shank of solid carbide rotary files is not limited by this table. ?) Extended shanks can be made according to orders.
The relationship between the cutting part diameter and the shank diameter is in accordance with Table 3. 4.2
Shaft length
30(40)
Shaft diameter
Note: The dimensions in brackets are produced according to orders.
4.3 Deviation
4.3.1 Deviation of cutting part diameter is in accordance with Table 4. Cutting part diameter
Limit deviation
Note: The values ​​in brackets can be adopted in the near future. 3
Character symbol
Extended shank Shank length
50.80,J00.
125,160,200.250
4.3.2 Shank diameter deviation: h9
4.3.3 Cone angle (a) deviation: ±1
5 Tooth type and number of teeth
5.1 Tooth type is in accordance with Table 5.
Tooth type
Character symbol
GB 9217 --88
The tooth shape has two types: ordinary shape and split-chip shape. For split-chip rotary files, the letter "X" should be added after the number 1. 5.2 The recommended number of teeth is in accordance with Table 6.
Cutting part
6 Technical requirements
12～15
14--16
28--30
32～34
36-~38
The cutting edge of the carbide rotary file should be sharp, and there should be no defects such as cracks, notches, and chipping that affect the performance on the surface, and there should be no rust on the handle.
There should be no incomplete penetration at the welding point.
6.2 The surface roughness of the rotary file shall comply with GB1031 "Surface roughness of the front and back
Outer circle of the shank
6.3 Shape and position tolerance
Radial (bevel) circular run-out of the circumferential cutting edge to the axis of the shank: end face circular run-out of the end face to the axis of the shank: parameters and their values", and its value shall not be greater than the following provisions: 0.1mm
6.4 The cutting part of the rotary file is made of K10~K30 or M10~M30 cemented carbide (according to GB2075 "Classification and grouping code of cemented carbide for cutting processing"), and the specific brand can be selected by the manufacturer. 6.5 The hardness of the handle of the rotary file shall not be less than HRC30. 6.6 Recommended angles
The grooves of the rotary file shall be made into equal rake angles and equal helix angles: Rake angle
Helix angle
Q = 3°~100
β5℃～20°
Generally, it is right-hand spiral right-hand cutting, and 60° and 90° conical rotary files (and K-type) can also be made into straight grooves.
7 Performance test Www.bzxZ.net
7.1 During the test, pneumatic and electric high-speed grinding heads are used. 7.2 Handheld grinding head feed.
GB 9217-88
7.3 The test material is 40Cr steel, and its quenched and tempered hardness is HB200~220.7.4 Cutting amount for test
The test should be carried out in the middle part of the cutting edge, and the cutting specifications are in accordance with the table. For the cutting width of D and IK type rotary files, take half of the value in Table 7.
Cutting part
Cutting width
Cutting depth
After the test, the rotary file shall not have chipping and obvious blunting. 8 Marking and packaging
8.1 Marking
8.1.1 The carbide rotary file shall be marked with: r/untin
28 000-75000
10 000--40 000
7 000~-25 000
Manufacturer's trademark, rotary file code (letter symbol, diameter, blade length), carbide application classification code. 8.1.2 The packaging box of carbide rotary files should be marked with: tn
Total length
Product name, national standard number, manufacturer name and trademark, rotary file code (for products packaged in groups, the code may not be marked on the packaging box), carbide use classification code, number of pieces, and year and month of manufacture. 8.1.3 The color of the label attached to the packaging box should comply with the provisions of GB2075 "Classification and Grouping Code of Cemented Carbide for Cutting Processing" 8.2 Packaging
Carbide rotary files should be protected from bruises during packaging, the handle should be treated with rust prevention, and the packaged rotary files should be protected from damage. Additional instructions:
This standard was proposed by the National Technical Committee for Tool Standardization. This standard is under the jurisdiction of the National Technical Committee for Tool Standardization. This standard was drafted by Chengdu Tool Research Institute and Shanghai Tool Institute.
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