This standard specifies the basic requirements for position tolerance, material and hardness, appearance and surface roughness, marking and packaging of cemented carbide reamers. This standard applies to cemented carbide straight shank and Morse taper shank machine reamers produced in accordance with GB/T4251 and GB/T4252. GB/T 4253-2004 Technical conditions for cemented carbide reamers GB/T4253-2004 Standard download decompression password: www.bzxz.net

ICS25.00.30
National Standard of the People's Republic of China
GB/T 42532004
Replaces G/T4253-1984
Technical Conditions
Reaners with carbide tips-Technical Regulations2004-02-10Published
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Implemented on August 1, 2004
This standard replaces (T/\425-:934 Technical Conditions for Hard Alloy Reamers. Compared with G3/T4253
33:
Cancel GB/1253--1\4 The test part; modified (/42531984 in the forget printing packaging department to increase the surface roughness.
This right is approved by the China Machinery Industry Association. Ten standards are under the jurisdiction of the National Tool Standardization Technical Committee GR/T4253-2004
This standard is jointly owned by the Crown Crown South First Factory and the factory, the factory and the sea" company, Xinyang Xinguang Huacheng Automobile Engine Co., Ltd. The main drafters of this cup pile: Fu Jianxiao, Kong Chunyan, Huang Dedu, Gong Yiyan. The previous market situation of the new generation of parts management: GHT =7531S84.
Carbide reamer
Technical conditionswww.bzxz.net
GB/T4253—2004
This standard specifies the basic requirements for the appearance and surface material of hard alloy reamer and its decoration. This standard is applicable to the existing products produced in accordance with GB/T4251CB/T42:2: 2 Normative references
The following clauses are used as standards through reference to this standard: For any reference without a business date, all subsequent amendments shall apply to the following: (Not including the current error content) or will not be used in the revised version of this standard, however, the latest version of these documents may be used in accordance with the agreement reached on the revision of the standard. The latest version of the referenced documents is applicable to this standard: T! 2025-1998.i150513.1551)
(B/T1251 hard straight handle with enterprise need to select GB/T4252 chain quality Mo Min cylinder machine with relatively large] 3 bell knife position tolerance and example work degree
3. 1 According to the position of the blade, see Table 1. HS. 9 level 3.2 According to the calibration part, there is a risk of reverse sharing of the bottom diameter 4 Materials and hardness 4.1 Material The standard translation is bright rice cf:>3u Chain link (T3/T2C75, relatively strong! The body is made of 40Cr or other grade of steel with equivalent performance. 4.2 Hardness
The hardness of the part is SOHRC--45HRC5 Appearance and surface roughness
5.1 Appearance
There shall be no cracks on the small piece, no high marks on the front edge, no high marks on the surface, no rust, no grinding and burning, etc. that affect the performance. The joints shall be round and there shall be no obvious welding width. 5.2 Surface roughness
1. Limitation of surface roughness:
CB/T42532004
Front and rear surface, R3.2
Pull surface. R1.5Ptl;
Handle outer network, Ral, 4ur
6 Marking and packaging
6.1 Marking
6.1.1 The product is marked with:
: Manufacturer's or seller's trademark:
... Direct price;
First roughness grade:
Carbide blade brand number.
6.1.2 The packaging tray should be marked with:
· The name, address and trademark of the manufacturer or distributor; the mark of the knife
hard steel blade: the brand of the alloy blade:
the number of pieces:
-year of manufacture.
6.2 Packaging
The stainless steel blade should be rust-proofed before packaging. The packaging surface must be firm to prevent improper transportation.
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.