GB/T 24610.2-2019 Rolling bearings—Measuring methods for vibration—Part 2:Radial ball bearings with cylindrical bore and outside surface (English Version)
GB/T 24610 covers the following four parts under the general title Rolling Bearings - Measuring Methods for Vibration:
——Part 1: Fundamentals;
——Part 2: Radial Ball Bearings with Cylindrical Bore and Outside Surface;
——Part 3: Radial Spherical and Tapered Roller Bearings with Cylindrical Bore and Outside Surface;
——Part 4: Radial Cylindrical Roller Bearings with Cylindrical Bore and Outside Surface.
This part is Part 2 of GB/T 24610.
This part is developed in accordance with the rules given in GB/T 1.1-2009.
This part replaces GB/T 24610.2-2009 Rolling bearings - Measuring methods for vibration - Part 2: Radial ball bearings with cylindrical bore and outside surface, and the following main technical changes are made made with respect to GB/T 24610.1-2009:
——The part of the expression "rotational frequency" is modified (see 4.1, 4.1 of Edition 2009);
——The representation of the symbol "root mean square vibration velocity" is modified (see 5.1, 5.1 of Edition 2009);
——The "Examples of frequency ranges for non-standard rotational frequencies" table is added (see Table 3);
——Some graphs are modified and the illustration of the graph is added (see Figure 2, Figure 3 and Figure A.1; Figure 2, Figure 3 and Figure A.1 of Edition 2009);
——The "bearing cleanliness, lubrication, operator requirements" is deleted (see 6.1.2, 6.1.3, 6.4 of Edition 2009);
——The requirement of "non-prelubricated bearings" is added (see 6.1.2);
This part is identical with International Standard ISO 15242-2:2015 Rolling bearings - Measuring methods for vibration - Part 2: Radial ball bearings with cylindrical bore and outside surface.
The Chinese documents identical to the normative international documents given in this part are as follows:
——GB/T 1800.2-2009, Geometrical Product Specifications (GPS) - Limits and Fits - Part 2: Tables of Standard Tolerance Grades and Limit Deviations for Holes and Shafts (ISO 286-2:1988, MOD)
——GB/T 2298-2010, Mechanical Vibration, Shock and Condition Monitoring - Vocabulary (ISO 2041:2009, IDT);
——GB/T 6930-2002, Rolling Bearings - Vocabulary (ISO 5593:1997, IDT)
——GB/T 24610.1-2019, Rolling bearings - Measuring methods for vibration Part 1: Fundamentals ( ISO 15242-1:2015, IDT)
This standard was proposed by the China Machinery Industry Federation.
This part is under the jurisdiction of the National Technical Committee on Rolling Bearing of Standardization Administration of China (SAT/TC 98).
The previous editions of this part are as follows:
——GB/T 24610.2-2009.
Introduction
Vibration in rotating rolling bearings can be of importance as an operating characteristic of such bearings. The vibration can affect the performance of the mechanical system incorporating the bearing and can result in audible noise when the vibration is transmitted to the environment in which the mechanical system operates, can lead to damages, and can even create health problems.
Vibration of rotating rolling bearings is a complex physical phenomenon dependent on the conditions of operation. Measuring the vibration of an individual bearing under a certain set of conditions does not necessarily characterize the vibration under a different set of conditions or when the bearing becomes part of a larger assembly. Assessment of the audible sound generated by the mechanical system incorporating the bearing is further complicated by the influence of the interface conditions, the location and orientation of the sensing device, and the acoustical environment in which the system operates. Assessment of airborne noise, which for the purpose of GB/T 24610 (all parts) can be defined as any disagreeable and undesired sound, is further complicated by the subjective nature of the terms disagreeable and undesired. Structure-borne vibration can be considered the driving mechanism that ultimately results in the generation of airborne noise. Only selected methods for the measurement of the structure-borne vibration of rotating rolling bearings are addressed in GB/T 24610 (all parts).
Vibration of rotating rolling bearings can be assessed by a number of means using various types of transducers and measurement conditions. No simple set of values characterizing the vibration of a bearing is adequate for the evaluation of the vibratory performance in all possible applications. Ultimately, a knowledge of the type of bearing, its application and the purpose of the vibration measuring (e.g. as a manufacturing process diagnostic or an assessment of product quality) is required to select the most suitable method for measuring. The field of application for standards on bearing vibration is therefore not universal. However, certain methods have established a wide enough level of application to be considered as standard methods.
This part serves to define the detailed method for assessing vibration of radial ball bearings with cylindrical bore and outside surface on a measuring device.
Rolling bearings - Measuring methods for vibration
Part 2: Radial ball bearings with cylindrical bore and outside surface
1 Scope
This part of GB/T 24610 specifies vibration measuring methods for single-row and double-row radial ball bearings, with a contact angle up to and including 45°.
It applies to radial ball bearings with cylindrical bore and outside surface.
It does not apply to bearings with filling slots and three- and four-point-contact ball bearings.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 286-2 Geometrical product specifications (GPS) - ISO code system for tolerances on linear sizes - Part 2: Tables of standard tolerance classes and limit deviations for holes and shafts
ISO 2041:2009 Mechanical vibration, shock and condition monitoring - Vocabulary ISO 5593, Rolling bearings - Vocabulary
ISO 5593 Rolling bearings - Vocabulary
ISO 15242-1:2015 Rolling bearings - Measuring methods for vibration - Part 1:Fundamentals
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 2041, ISO 5593 and ISO 15242-1 apply.
4 Measurement process
4.1 Rotational frequency
The default rotational frequency shall be 1800 min−1 (30 s−1). The tolerance shall be of the nominal rotational frequency.
Other rotational frequencies and tolerances may be used by agreement between the manufacturer and the customer, for example, it may be necessary to use a higher rotational frequency for bearings in the smaller size range (e.g. 3600 min−1) in order to obtain an adequate vibration signal. Conversely, it may be necessary to use a lower rotational frequency for bearings in the larger size range (e.g. 700 min−1) to avoid possible ball and raceway damage.
4.2 Bearing axial load
The bearing load shall be in the axial direction with default values as specified in Table 1.
Table 1 Default values for bearing axial load
Bearing outside diameter
D Single-row and double-row deep groove and self-aligning radial ball bearings Single-row and double-row angular contact radial ball bearings
10° < Contact angle ≤ 23° 23° < Contact angle ≤ 45°
Default values for axial load
> ≤ min. max. min. max. min. max.
mm N N N
10 25 18 22 27 33 36 44
25 50 63 77 90 110 126 154
50 100 135 165 203 247 270 330
100 140 360 440 540 660 720 880
140 170 585 715 878 1072 1170 1430
170 200 810 990 1215 1485 1620 1980
Other axial loads and tolerances may be used by agreement between the manufacturer and the customer, for example, depending on bearing design, rotational frequency and lubricant used, it may be necessary to use a higher load to prevent ball/raceway slip or a lower load to avoid possible ball and raceway damage.
5 Measurement and evaluation methods
5.1 Physical quantity measured
The default physical quantity to be measured is root mean square vibration velocity, νrms(µm/s), in the radial direction.
5.2 Frequency domain
The vibration velocity shall be analysed in one or more bands with default frequency ranges as specified in Table 2.
Table 2 Default Frequency ranges for default rotational frequency of 1 800 min−1
Rotational frequency Low band (L) Medium band (M) High band (H)
Nominal band pass frequencies
min. max. flow fupp flow fupp flow fupp
min−1 Hz Hz Hz
1764 1818 50 300 300 1800 1800 10000
Other frequency ranges may be considered by agreement between the manufacturer and the customer in those instances where specific ranges have greater importance to successful operation of the bearing. Common used examples are listed in Table 3.
Changing the frequency of rotation should always come along with a proportional change of the filter frequencies and acceptance limits and minimum measuring time. Examples are given in Table 3.
Table 3 Examples of frequency ranges for non-standard rotational frequencies
Rotational frequency Low band (L) Medium band (M) High band (H)
Nominal band pass frequencies
nominal min. max. flow fupp flow fupp flow fupp
min−1 Hz Hz Hz
3600 3528 3636 100 600 600 3600 3600 20000
900 882 909 25 150 150 900 900 5000
700a 686 707 20 120 120 700 700 4000
a In case of 700 min−1, cut-off frequencies are rounded (not according to exact relation of the rotational frequency).
Narrow band spectral analysis of the vibration signal may be considered as a supplementary option.
5.3 Measurement of pulses and spikes
Detection of pulses or spikes in the time domain velocity signal, usually due to surface defects and/or contamination in the measured bearing, may be considered as a supplementary option. Various evaluation methods exist.
5.4 Measurement
All bearings, except for single-row angular contact ball bearings, shall be measured with the axial load applied from one side of the stationary ring and the measurement repeated with the axial load on the other side of the stationary ring. Single-row angular contact ball bearings shall be measured in their foreseen axial load carrying direction only.
Foreword I
Introduction III
1 Scope
2 Normative references
3 Terms and definitions
4 Measurement process
4.1 Rotational frequency
4.2 Bearing axial load
5 Measurement and evaluation methods
5.1 Physical quantity measured
5.2 Frequency domain
5.3 Measurement of pulses and spikes
5.4 Measurement
6 Conditions for measurement
6.1 Bearing conditions for measurement
6.2 Conditions of the measurement environment
6.3 Conditions for the measuring device
Annex A (normative) Measurement of external axial loading alignment
GB/T 24610.2-2019 Rolling bearings—Measuring methods for vibration—Part 2:Radial ball bearings with cylindrical bore and outside surface (English Version)
Standard No.
GB/T 24610.2-2019
Status
valid
Language
English
File Format
PDF
Word Count
5500 words
Price(USD)
150.0
Implemented on
2020-5-1
Delivery
via email in 1 business day
Detail of GB/T 24610.2-2019
Standard No.
GB/T 24610.2-2019
English Name
Rolling bearings—Measuring methods for vibration—Part 2:Radial ball bearings with cylindrical bore and outside surface
GB/T 24610 covers the following four parts under the general title Rolling Bearings - Measuring Methods for Vibration:
——Part 1: Fundamentals;
——Part 2: Radial Ball Bearings with Cylindrical Bore and Outside Surface;
——Part 3: Radial Spherical and Tapered Roller Bearings with Cylindrical Bore and Outside Surface;
——Part 4: Radial Cylindrical Roller Bearings with Cylindrical Bore and Outside Surface.
This part is Part 2 of GB/T 24610.
This part is developed in accordance with the rules given in GB/T 1.1-2009.
This part replaces GB/T 24610.2-2009 Rolling bearings - Measuring methods for vibration - Part 2: Radial ball bearings with cylindrical bore and outside surface, and the following main technical changes are made made with respect to GB/T 24610.1-2009:
——The part of the expression "rotational frequency" is modified (see 4.1, 4.1 of Edition 2009);
——The representation of the symbol "root mean square vibration velocity" is modified (see 5.1, 5.1 of Edition 2009);
——The "Examples of frequency ranges for non-standard rotational frequencies" table is added (see Table 3);
——Some graphs are modified and the illustration of the graph is added (see Figure 2, Figure 3 and Figure A.1; Figure 2, Figure 3 and Figure A.1 of Edition 2009);
——The "bearing cleanliness, lubrication, operator requirements" is deleted (see 6.1.2, 6.1.3, 6.4 of Edition 2009);
——The requirement of "non-prelubricated bearings" is added (see 6.1.2);
This part is identical with International Standard ISO 15242-2:2015 Rolling bearings - Measuring methods for vibration - Part 2: Radial ball bearings with cylindrical bore and outside surface.
The Chinese documents identical to the normative international documents given in this part are as follows:
——GB/T 1800.2-2009, Geometrical Product Specifications (GPS) - Limits and Fits - Part 2: Tables of Standard Tolerance Grades and Limit Deviations for Holes and Shafts (ISO 286-2:1988, MOD)
——GB/T 2298-2010, Mechanical Vibration, Shock and Condition Monitoring - Vocabulary (ISO 2041:2009, IDT);
——GB/T 6930-2002, Rolling Bearings - Vocabulary (ISO 5593:1997, IDT)
——GB/T 24610.1-2019, Rolling bearings - Measuring methods for vibration Part 1: Fundamentals ( ISO 15242-1:2015, IDT)
This standard was proposed by the China Machinery Industry Federation.
This part is under the jurisdiction of the National Technical Committee on Rolling Bearing of Standardization Administration of China (SAT/TC 98).
The previous editions of this part are as follows:
——GB/T 24610.2-2009.
Introduction
Vibration in rotating rolling bearings can be of importance as an operating characteristic of such bearings. The vibration can affect the performance of the mechanical system incorporating the bearing and can result in audible noise when the vibration is transmitted to the environment in which the mechanical system operates, can lead to damages, and can even create health problems.
Vibration of rotating rolling bearings is a complex physical phenomenon dependent on the conditions of operation. Measuring the vibration of an individual bearing under a certain set of conditions does not necessarily characterize the vibration under a different set of conditions or when the bearing becomes part of a larger assembly. Assessment of the audible sound generated by the mechanical system incorporating the bearing is further complicated by the influence of the interface conditions, the location and orientation of the sensing device, and the acoustical environment in which the system operates. Assessment of airborne noise, which for the purpose of GB/T 24610 (all parts) can be defined as any disagreeable and undesired sound, is further complicated by the subjective nature of the terms disagreeable and undesired. Structure-borne vibration can be considered the driving mechanism that ultimately results in the generation of airborne noise. Only selected methods for the measurement of the structure-borne vibration of rotating rolling bearings are addressed in GB/T 24610 (all parts).
Vibration of rotating rolling bearings can be assessed by a number of means using various types of transducers and measurement conditions. No simple set of values characterizing the vibration of a bearing is adequate for the evaluation of the vibratory performance in all possible applications. Ultimately, a knowledge of the type of bearing, its application and the purpose of the vibration measuring (e.g. as a manufacturing process diagnostic or an assessment of product quality) is required to select the most suitable method for measuring. The field of application for standards on bearing vibration is therefore not universal. However, certain methods have established a wide enough level of application to be considered as standard methods.
This part serves to define the detailed method for assessing vibration of radial ball bearings with cylindrical bore and outside surface on a measuring device.
Rolling bearings - Measuring methods for vibration
Part 2: Radial ball bearings with cylindrical bore and outside surface
1 Scope
This part of GB/T 24610 specifies vibration measuring methods for single-row and double-row radial ball bearings, with a contact angle up to and including 45°.
It applies to radial ball bearings with cylindrical bore and outside surface.
It does not apply to bearings with filling slots and three- and four-point-contact ball bearings.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 286-2 Geometrical product specifications (GPS) - ISO code system for tolerances on linear sizes - Part 2: Tables of standard tolerance classes and limit deviations for holes and shafts
ISO 2041:2009 Mechanical vibration, shock and condition monitoring - Vocabulary ISO 5593, Rolling bearings - Vocabulary
ISO 5593 Rolling bearings - Vocabulary
ISO 15242-1:2015 Rolling bearings - Measuring methods for vibration - Part 1:Fundamentals
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 2041, ISO 5593 and ISO 15242-1 apply.
4 Measurement process
4.1 Rotational frequency
The default rotational frequency shall be 1800 min−1 (30 s−1). The tolerance shall be of the nominal rotational frequency.
Other rotational frequencies and tolerances may be used by agreement between the manufacturer and the customer, for example, it may be necessary to use a higher rotational frequency for bearings in the smaller size range (e.g. 3600 min−1) in order to obtain an adequate vibration signal. Conversely, it may be necessary to use a lower rotational frequency for bearings in the larger size range (e.g. 700 min−1) to avoid possible ball and raceway damage.
4.2 Bearing axial load
The bearing load shall be in the axial direction with default values as specified in Table 1.
Table 1 Default values for bearing axial load
Bearing outside diameter
D Single-row and double-row deep groove and self-aligning radial ball bearings Single-row and double-row angular contact radial ball bearings
10° < Contact angle ≤ 23° 23° < Contact angle ≤ 45°
Default values for axial load
> ≤ min. max. min. max. min. max.
mm N N N
10 25 18 22 27 33 36 44
25 50 63 77 90 110 126 154
50 100 135 165 203 247 270 330
100 140 360 440 540 660 720 880
140 170 585 715 878 1072 1170 1430
170 200 810 990 1215 1485 1620 1980
Other axial loads and tolerances may be used by agreement between the manufacturer and the customer, for example, depending on bearing design, rotational frequency and lubricant used, it may be necessary to use a higher load to prevent ball/raceway slip or a lower load to avoid possible ball and raceway damage.
5 Measurement and evaluation methods
5.1 Physical quantity measured
The default physical quantity to be measured is root mean square vibration velocity, νrms(µm/s), in the radial direction.
5.2 Frequency domain
The vibration velocity shall be analysed in one or more bands with default frequency ranges as specified in Table 2.
Table 2 Default Frequency ranges for default rotational frequency of 1 800 min−1
Rotational frequency Low band (L) Medium band (M) High band (H)
Nominal band pass frequencies
min. max. flow fupp flow fupp flow fupp
min−1 Hz Hz Hz
1764 1818 50 300 300 1800 1800 10000
Other frequency ranges may be considered by agreement between the manufacturer and the customer in those instances where specific ranges have greater importance to successful operation of the bearing. Common used examples are listed in Table 3.
Changing the frequency of rotation should always come along with a proportional change of the filter frequencies and acceptance limits and minimum measuring time. Examples are given in Table 3.
Table 3 Examples of frequency ranges for non-standard rotational frequencies
Rotational frequency Low band (L) Medium band (M) High band (H)
Nominal band pass frequencies
nominal min. max. flow fupp flow fupp flow fupp
min−1 Hz Hz Hz
3600 3528 3636 100 600 600 3600 3600 20000
900 882 909 25 150 150 900 900 5000
700a 686 707 20 120 120 700 700 4000
a In case of 700 min−1, cut-off frequencies are rounded (not according to exact relation of the rotational frequency).
Narrow band spectral analysis of the vibration signal may be considered as a supplementary option.
5.3 Measurement of pulses and spikes
Detection of pulses or spikes in the time domain velocity signal, usually due to surface defects and/or contamination in the measured bearing, may be considered as a supplementary option. Various evaluation methods exist.
5.4 Measurement
All bearings, except for single-row angular contact ball bearings, shall be measured with the axial load applied from one side of the stationary ring and the measurement repeated with the axial load on the other side of the stationary ring. Single-row angular contact ball bearings shall be measured in their foreseen axial load carrying direction only.
Contents of GB/T 24610.2-2019
Foreword I
Introduction III
1 Scope
2 Normative references
3 Terms and definitions
4 Measurement process
4.1 Rotational frequency
4.2 Bearing axial load
5 Measurement and evaluation methods
5.1 Physical quantity measured
5.2 Frequency domain
5.3 Measurement of pulses and spikes
5.4 Measurement
6 Conditions for measurement
6.1 Bearing conditions for measurement
6.2 Conditions of the measurement environment
6.3 Conditions for the measuring device
Annex A (normative) Measurement of external axial loading alignment
