JB/T 9921.1-1999 This standard is a revision of ZB J55 049-90 "Precision of bearing inner ring groove superfinishing machine and bearing outer ring groove superfinishing machine". This standard is part of the JB/T 9921 "Bearing inner ring groove superfinishing machine and bearing outer ring groove superfinishing machine" series of standards, which includes the following two parts: JB/T 9921.1-1999 Bearing inner ring groove superfinishing machine and bearing outer ring groove superfinishing machine Precision inspection JB/T 9921.2-1999 Bearing inner ring groove superfinishing machine and bearing outer ring groove superfinishing machine Technical conditions This standard specifies the requirements and inspection methods for the geometric accuracy inspection and working accuracy inspection of bearing inner ring groove superfinishing machine and bearing outer ring groove superfinishing machine. This standard is applicable to four-station two-step superfinishing machine for processing the maximum bore diameter of the bearing inner ring of 25~100mm and the maximum outer diameter of the bearing outer ring of 40~125mm. Other types of superfinishing machines can be used for reference. This standard was first issued in March 1990. JB/T 9921.1-1999 Bearing inner ring groove superfinishing machine and bearing outer ring groove superfinishing machine precision inspection JB/T9921.1-1999 standard download decompression password: www.bzxz.net

[CS 25.080.50
Machinery Industry Standard of the People's Republic of China
FB/T9921.1-9921.2-—1999
Bearing Inner Ring Groove Superfinishing Machine
And Bearing Outer Ring Groove Superfinishing Machine
1999-05-20 Issued
National Machinery Industry Bureau
2000-01-01 Implementation
9921.1-1999
This standard is revised on the basis of ZBJ5504990 "Bearing Inner Ring Groove Superfinishing Machine and Bearing Outer Ring Groove Superfinishing Machine Accuracy". This standard should be consistent with the technical content of ZBJ5504990, and has been revised according to relevant regulations. This standard is part of the JD/T9921 series of standards, which includes the following two parts:
B/T9921.1-19W Bearing inner groove superfinishing machine and bearing outer ring groove superfinishing machine with inspection and testing JBT9921.2-199 Bearing inner groove superfinishing machine and bearing outer ring superfinishing machine according to the technical plan This standard replaces 2BJSS04990 from the date of implementation. This standard is proposed by the National Technical Committee for Standardization of Cutting Machine Tools. This standard is proposed by the National Technical Committee for Standardization of Cutting Machine Tools. The responsible unit of this standard is Wuqi Machine Tool Factory. This standard was first issued in March 1990. bzxZ.net
Standard of the Machinery Industry of the People's Republic of China
Precision Inspection of Bearing Inner Groove Superfinishing Machine and Bearing Outer Groove Superfinishing Machine
1 Scope
JB/T5921.1—1999
ZBJ55049.90
This standard specifies the requirements and inspection methods for the geometrical precision inspection and the mechanical precision inspection of the bearing inner ring groove superfinishing machine and the bearing outer ring groove superfinishing machine.
This standard is applicable to the four-step superfinishing machine with a large bore diameter of 25-100mm and a maximum outer diameter of 40-125mm for the bearing outer ring. Other types of superfinishing machines can also be used as a reference. Referenced Standards
The references contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards are subject to revision. All parties using this standard shall consider the possibility of using the latest version of the following standards. GB/T 103I—1993
Surface roughness reference and its value
GB/T17421.1—199S General rules for machine tool inspection Part 1: Geometric accuracy of machine tools under no-load or finishing conditions JB/F9924—1999
3 General requirements
Grinding surface waviness
3.1 When using this standard, the relevant provisions of GB/T17421.1 should be referred to. In particular, the installation before inspection, the idle running temperature rise of the spindle and other components, the inspection method and the precision of the inspection tools should be adopted. 3.2 According to the provisions of 3.1 in GB/T17421.1—1998, the installation water level should be adjusted, and the readings of the water gauge in the longitudinal and transverse directions should not exceed 0.04/1000.
3.3 Before inspection, the actual inspection order can generally be arranged according to the requirements of the installation and disassembly tools, inspection convenience, and thermal inspection items. 3.4 When the measured length is different from the length specified in this standard, the tolerance shall be converted to the measurable length according to the provisions of 2.3.1.1 of GB/T 37421.1-1998. When the conversion result is less than 0.001mm, it shall still be calculated as 0.001mm. 3.5 When inspecting the working accuracy, the test piece shall be inspected after precision separation. 3,6 According to the agreement between the user and the manufacturer, the inspection items can be increased or decreased. Approved by the State Administration of Machinery Industry on May 20, 1999 and implemented on January 1, 2000. JBT 9921.1-1999 JB/T 9921.1-1999 JH/T 9921.1 - 1999 IB/T 9921.1 -1999 JB/T 9921.1 - 1999
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