This standard specifies the basic requirements for position tolerance, material and hardness, appearance and surface roughness, marking and packaging of machine reamers. This standard applies to high-speed steel machine reamers produced in accordance with GB/T1132, GB/T1134, GB/T1135, GB/T4243 and GB/T4244. GB/T 4245-2004 Technical conditions for machine reamers GB/T4245-2004 Standard download decompression password: www.bzxz.net

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National Standard of the People's Republic of China
GB/T 42452004
GB42451981
Technical conditions for machine reamers
Technical conditions for machine reamers2004-02-10 Issued
National Quality Supervision, Inspection and Quarantine Administration of the People's Republic of China
2004-08-01 Implementation
This standard replaces (1/T4245--1984 Technical Record 3 for Machine Reamers) from the date of implementation. The main changes of this standard compared with H/T42451S84 are as follows: 1. Added "parameter group"
Added "normative reference documents"
"Discrimination" "performance test" requirements!
The material used is\W. 4V was changed to \w6Mo5Cr4V2\; the requirement of "surface roughness" was added: in the table "! The position of the blade when the diameter tolerance is the center was added: the requirements of the mark and package taste were changed:
This standard is proposed by the China Machinery Industry Federation. This standard is only established by the National Standardization Technical Committee (SAC/TCUI) and belongs to the factory. The original founder of this standard is: Chengdu Tool Research Institute. The original founder of the standard is: Fan, Xu Gang.
The history of the standards represented by this standard and the release of this standard G/74245-1984
CB/T4245-2 004
1 Scope
Technical conditions for machine reamer
GB/T4245—2004
This standard specifies the basic requirements for the position, cutting and cutting depth, external and surface roughness, marking and packaging of machine reamer. This standard is based on the high-quality machine tools produced in accordance with G13/T1132, G15/T11H4, B/T1155.GB/T1243.G:B/T4214.
2 Normative reference documents
The clauses in the following documents become part of this standard through reference. The provisions of the standard. For all referenced documents with a date of month, all subsequent correction units [excluding errata] are not applicable to this standard. However, parties that reach an agreement based on this standard are encouraged to study whether to use the latest versions of these documents: For referenced documents without an errata date, the latest version applies to this standard. G/T11.42 Straight and total maintenance machine comparison (C/T1132-2504.1S0521:1$75, M03) Blade balance angle British taper shank machine control
GB/T1134
G/T1135
GB/T 4243
GB/T 2244
3 Position tolerance
Sharp shaft for type machine (/1135-4,10:1, M)) Fluorescent handle blade machine 2-knife
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