Ball bearing processing trade unit consumption standard (HDB/JB002-2000)" (commodity number 84821000)
1 Scope This standard specifies the processing trade unit consumption standard for high-carbon chromium bearing steel (product number 72283000) processing and production of conventional ball bearings (commodity number 84821000).
This standard is applicable to the Customs and Foreign Trade and Economic Cooperation Department in the processing trade single-use filing, approval and verification management of processing trade enterprises that use conventional high-carbon chrome bearing steel (product number 72283000) to produce conventional ball bearings (product number 84821000).
2 Definitions The following definitions are used in this standard: Unit consumption refers to the weight of the bearing steel used to process each set of bearings under normal production conditions, ie the net consumption, in kilograms per set. The loss rate refers to the percentage of the total weight of the bearing steel that must be used in the production process and cannot be materialized in the production process due to the requirements of the processing and production process.
3 unit consumption standard
3.1 Raw material quality specifications The raw material of the bearing ring is generally GCrl5 special bearing steel, the US material adopts the standard AISI52100, and the domestic material adopts the standard SUI-2. Bearing steel requires proper chemical composition, uniform internal organization, and high steel purity. The steel plate is hot-rolled, and the supply state can be divided into annealing and non-annealing.
3.2 Finished product quality specifications The finished product quality specifications for processing trade are generally formulated according to customer needs. The dimensional accuracy of the finished bearing and the precision of the finished product should be basically guaranteed, and the requirements of low noise and long life should also be met.
3.3 Unit consumption standard This unit consumption standard only includes the inner jacket ring on the bearing steel machining bearing. The steel ball, cage and sealing ring on the bearing are not included in the scope.
Ball bearing processing trade unit consumption standard
Preface Finished Product Name Finished Goods Product Finished Material Name Raw Material Product Number Unit Consumption (Thousand Loss Rate Number Unit No. Specification Unit gram/set) (%)
1 Ball bearing sleeve 84821000 608 High carbon chromium bearing steel kg 72283000 0.0083 74
2 Ball bearing sleeve 84821000 6201 High carbon chromium bearing steel kg 72283000 0.0277 70
3 Ball bearing sleeve 84821000 6203 High carbon chromium bearing steel kg 72283000 0.0506 68
4 Ball bearing sleeve 84821000 >6205 High carbon chromium bearing steel kg 72283000 0.1005 >72
5 Ball bearing sleeve 84821000 >6207 High carbon chromium bearing steel kg 72283000 0.2207 >69
6 Ball bearing sleeve 84821000 >6208 High carbon chromium bearing steel kg 72283000 0.3241 >68
7 Ball bearing sleeve 84821000 6304 High carbon chromium bearing steel kg 72283000 0.1079 >70
8 Ball bearing sleeve 84821000 >6305 High carbon chromium bearing steel kg 72283000 0.1627 69
9 Ball bearing sleeve 84821000 >UC205 High carbon chromium bearing steel kg 72283000 0.1450 66
10 Ball bearing sleeve 84821000 UC209 High carbon chromium bearing steel kg 72283000 0.5420 67