This standard specifies the dimensions and tolerances of needle roller and bidirectional thrust cylindrical roller combination bearings. ZARN type - needle roller and bidirectional thrust cylindrical roller combination bearing. ZARF type - needle roller and bidirectional thrust cylindrical roller combination bearing with flange. This standard applies to the production and inspection of bearings by bearing manufacturers and the selection and acceptance of finished bearings by users. JB/T 6644-1993 Dimensions and tolerances of rolling bearing needle rollers and bidirectional thrust cylindrical roller combination bearings JB/T6644-1993 Standard download and decompression password: www.bzxz.net

Machinery Industry Standards of the People's Republic of China
Rolling Bearings
Needle Rollers and Bidirectional Thrust Cylindrical Rollers
Combined Bearing Dimensions and Tolerances
Theme Content and Applicable Samples||tt| |JB/6644.-93
This standard specifies the dimensions and tolerances of needle roller and bidirectional thrust cylindrical roller combined bearings (hereinafter referred to as combined bearings): ZARN type needle roller and bidirectional thrust cylindrical roller combined bearings (see picture 1). ZARF type needle roller and bidirectional thrust cylindrical roller combination bearing with flange (see Figure 2). This standard applies to the production and inspection of bearings by bearing manufacturers and the selection and acceptance of finished bearings by users. 2 Reference standards
GB307.1 Rolling bearing tolerances
(13307.2 Measurement methods of rolling bearing tolerances (334199 Rolling bearing tolerance definitions
JB/T2974
Supplementary provisions for rolling bearing code methods|| | tt | , the symbol used in this standard, its definition is specified in GB4199. T: Nominal width of coupling bearing:
Deviation of actual width of A7 combined bearing;
1) Nominal outer ring of combined bearing. Outer diameter:
D: Nominal outer diameter of combined bearing shaft ring:
ADm: Single plane average outer diameter deviation of the shaft ring
(\: Nominal width of outer ring; ||tt| |(: stepped width of outer ring;
f: nominal inner diameter of inner ring;
dt: nominal inner diameter of shaft ring;
Admt: single-plane average inner diameter deviation of shaft ring; T,: the axial distance from the outer end surface to the bottom surface of the shaft ring; T2: the nominal thickness of the shaft ring;
\: the nominal chamfer of the outer ring; the one-way minimum chamfer of
\in\ Size;
Factory: nominal chamfer of shaft ring;
\un: minimum one-way chamfer size,
Ministry of Mechanical and Electronic Industry approved 1993-05-12 1994-01 -01 Implementation
: The central circle diameter of Youzha and Luoli;
: Shanyi Nanxu:
Lianli Zhengzheng
: The external energy variation :
: The runout of the shaft to the raceway. ZARN
A size
The size of the set shaft is smaller than the requirements in Table 1~1. tt||Axis method code
VARN :15
ZARNIA
ZARN 2052
ARN2
2ARt:
ZARN3.||tt ||ZANV 7
ZARN EBU
ZARN B
1.3
17
2
30
5|| tt||:
17
57
62
70
75
80
54||tt| |JB/T 664493
Qiu 1
8
12.5
12.5
20
20
25|| tt||3
38
5
70
78
column
j.mn
11. :
37ARE
Quantity
3.
50
Code name
Z4RF 1560
7.AR1:1762| |tt||2.ARF 2068
2ARF 2575
ZARF 3080
7ARF 3590
ZARF I00
7ARF 45105
Z. ARF S0J15
15
17
2 hearts
30
35
10
-15||tt| |Bearing code
ZARN 2062
ZARN 2572
ZARN 3080
ZARN 3585
2ARN 1090
ZARN I0
ZARN GOIIO
ZARN 55115
ZARN G0I20
ZARN GE125
7ARN 70130
ZARN 75155
7ARN 90IS0
2.4 KN H0210
ZARN 130240
7ARV 150270
D
60
fi2
68
80||tt| |90
100
105
115
20
40)
13
f
50
34
50
60
25
30
35
46)
45
50
55
60
65
70
75
90
110|| tt||130
150
26
3.
35
36
D
62||tt ||72
80
85
9o
105
110
E15
120
125
130
155
180
210
240
270
16
1| |tt||2
20
25
25
60
G
6
66||tt ||75
82
82
832
car
14
8
22.5
Things
JB/T 6644--93
Table 2
ticket
column
inch, mn
diameter is still oily| |tt||Quantity
35
2
6i0
65
0
40
1.3||tt ||50
53-
53.5
53.5
82
83
82
100||tt| |110
130
150
1Gt
53.5
53.5
53.5
65
72.5
85
100
106
7. 5
1
11.5
46
48
3
73
80
85
Table 3
Department
C
20| |tt||20
20
20
25
25
25
25
25||tt ||25
25
30
35
40
50
52
3. 2||tt ||3.2
3. 3
13. 2
6
Oil hole
3.2
.mm
D
52
62
68
7
90
95
100| |tt||105
110
115
135
160
190
215
240||tt ||T
12.5
2.
17.5
17.5
.5
21
22.5||tt ||26
29
32
20
25
5
40
1
5
60
65
70
75
90
1.13
130
1.50| |tt||螺
水度
6- 61
6. 6
6.6↓12
h.
油
2.5
2.5
3.5
3.5||tt| |3.5
3.5
3- 5
3.5
3.5
3.5
孔
数||tt| |3
3
3
[
17
.ri
0.3.6
0.30.6| |tt||200.30.6
251 0.30.6
30
10.30.6
35
10
45|| tt||. 1 0. 6
0. 3
10.
o.
0.3
501
心
Tr
n.3||tt ||0. 3
0.3
. 3
0.3
0. 3
0.3
0.3
0.3
0. 3
(). 3
0.3
0.3
0.3
0. 3
0.3
.t
. 6
0.6
(.6
0.6
0.6
0.6
1.6
.
.
1. c)
1| |tt||ZARF2590
ZARF 031051
ZARF35110
ZARF 10115
ZARF 45130
ZARF 59140
ZARF 55145||tt| |ZARF60150
ZARF 65155
ZARF70160
7.ARF 75185
ZARF 90210
f
20
25| |tt||30
35
40
15
50
55
60
65||tt ||70
75
90
80
90
105
110
115
1.30
140
145
150
155
160
185
210
T| |tt||60
60
66
75
82
82
82
82||tt ||82
82
100
110
38
38
51
1
51
51
51
62
69.5
20
20
20
20| |tt||25
25
25
25
25
25
25
30||tt ||35
重
18
18
18
JB/T 6644--93
表4||tt| |系
R
T
52
62
6
73
22.5
22.5
22.
122.
78
9
95
100
105
22.5
12.5
12.5
16
1.7.5
17.5
17.5
17.5
22.55
110
17.5
117.5
[22.5]
115
27
32
135
21
160
22.5
63
73
85
88
94|| tt||105
113
118
123
128
133
155
列||tt| |守，mm
很向油孔长向油孔
数
3.2
3.2
3.2
1801||tt ||f
3.2
3.2
节
数斑
螺
6.6
11||tt| |孔
quantity
12
12
12
12
12
2
12
12
12
12
13.5
13.5
注：（I）当电影电视剧情机架时.后置代号TN，plastics allow working temperature with manufacturing factory 台离.）油孔数圡可由电影厂与电影台商可以。5公差個
5.1内圈
兽圈的公差歌机表5的运动||ht||表5内圈||hh||rd.mm||hh||性事||hh||10||hh||18||hh||30||hh|| 50
80
120
5.2
外阁
到
18
30
50
80
120
180
上自看
外圈的公差拍表薖的运动
).mm
overcome
30
50
80
120
152
180
230| |tt||556
到
50
80
120
150
180
250||tt ||315
AD
上了分
0
Ad n
下内了
-8
10| |tt||12
-15
- 18
表6
VDe
下自定
-11||tt| |13
15
-18
-- 20
-- 25
max
7
8| |tt||10
11
14
15
19
Vd,
max
5|| tt||6
11
14
外圈
VD
max
7
8||tt ||10
11
14
15
19
Vufan
max
5
6
8
9
11
14
Kra
max
10
13| |tt||18
20
23
25
30
12
12
Ka||tt ||tmaux
7
8
10
10
13
18
a
| |0. 3: 0. 6
3
. 3
3
.. 3
0.3
0.3
0. 3
0.3
9 0.3
劓f
.6
. 6
0.
0.6
0. F
心.
1.
1.心
ftm
S.
max
7|| tt||8
1t)
um
.
...
下自定
0
130
nax
.3
长圈
5.3
长圈的公差歌行表7的设计。
sti,mm| |tt||性交
10
18
30
50
80
120Www.bzxZ.net
5.4 使用|| tt||到
18
30
50
80
120
180
JB/T6644-- 93. |++: 90
+-107
-125
组含开合的化合公差AT.mm。
軺孔公心公差按H12选取。|| tt||軺孔位作公差取十0.1mm。
下凯线
-+32
+40
50
·60
72
85
Si
max
G1
上偏萃||tt| |20.| 、Kea、Sa的手机他件他件（reference件）
A1 流发安全电影在底的可以AT。 （见图A1）用品车或standard件件可以了了了的安全图像一间圈底面恋道4 The position of 心圆周三等分，用三支点支承，the measuring head is located at the bottom of another axle circle at the top of the fulcrum, and the width between the two axle circles is measured. T，是
ATT--T
图A1
A2 流发安全端端运动息道的跳动Sia使安全治生旅记图A1 电影，被明长圈外迈图Positioning the V-shaped block at 60° to the plane, the outer circle does not rotate, the rotation of the axis circle in contact with the measuring head is more than one week, read the maximum and the minimum value of the difference; then turn the combination bearing over, carry out the same measurement, take two个差個中-个个安全开开端端运动电道的成动Sia。 A3 combination bearing's inner circle directional jump movementKi(见图A2) will install the combination bearing's outer circle components and inner circle horizontally to the standard pitch心心之之之--处，心圈不可，使心心于内圈电影下载，明得最好与minimum值之差的内圈图向跳动Kiao
558
JB/T6644
图A2
A4 发动圈图店外圈图向跳动K（见图A2）93
外圈设计外在在发的三分在处，心圈不电视，心圈在在事年，在得得与在在值之差的外圈达向跳动K。。
A5内圈The standard of measurement according to GB307.2.所归口。本标准由洛阳起草研究和镇江起荷厂共冏起起草。本标准起草人李飞雪、朱志启女。559
F
心.
1.
1.心
ftm
S.
max
7||tt ||8
1t)
um
.
...
Lower deviation
0
130| |tt||nax
.3
shaft washer
5.3
The tolerance of the shaft washer complies with the requirements in Table 7.
sti,mm
over
10
18
30
50
80
120
5.4 Others
to
18
30
50
80
120
180| |tt||JB/T6644--93
Table? Valve circle
Ad ine
Upper deviation
+50
+61
-1 75
++: 90||tt ||+-107
-125
group includes bearing width tolerance AT.mm.
The screw hole diameter tolerance is selected according to H12.
The screw hole position tolerance is 0.1mm.
Lower deviation
-+32
+40
50
·60
72
85||tt ||Si
max
G1
upper bias
20
Aun
rm
lower bias| |tt||JB/T6644--93
Appendix A
Recommended measurement methods for ATs, Sia, Kin, Kea, Sa (reference parts)
A1 combined bearing actual width Deviation AT. (See Figure A1) Use block gauges or standard parts to compare measurements. The combined bearing is supported by three fulcrums at three equal parts of the center circle of the raceway 4 on the bottom surface of one shaft ring of the combined bearing. The probe is located on the bottom surface of the other shaft ring directly above the fulcrum for measurement. Measure several positions along the circumference and take the average. It is worth getting the width T between the bottom surfaces of the two shaft rings, so
ATT--T
Figure A1
A2 combined bearing end face runout Sia of the raceway makes the combined bearing in the figure In the A1 state, the radial plane of the outer diameter of the measured shaft ring is positioned with a 60° V-shaped block. The outer ring remains stationary, rotate the shaft ring in contact with the probe for more than one turn, and read the difference between the maximum and minimum values; then combine the Turn the bearing over, perform the same measurement, and take the largest of the two differences as the runout Sia of the combined bearing end face to the raceway. The radial runout Ki of the inner ring of the A3 combined bearing (see Figure A2). Install the outer ring assembly and the inner ring of the combined bearing horizontally on a standard taper mandrel, and support the mandrel between two precision tips. Please measure the head At one-third of the width of the outer surface of the outer ring assembly, the outer ring does not rotate, and the mandrel and the inner ring rotate for more than one revolution. The difference between the maximum and minimum values ??measured is the radial runout of the inner ring Kiao||tt| |558
JB/T6644
Figure A2
The outer ring radial runout K of the A4 combined bearing (see Figure A2) 93
The outer ring assembly of the combined bearing Install it horizontally with the inner ring on a tapered mandrel, and support the mandrel between the two precision tips. A probe is placed at one-third of the width of the outer surface of the outer ring assembly. The mandrel does not rotate, and the outer ring does not rotate. For more than one revolution, the difference between the maximum and minimum values ??measured is the radial runout K of the outer ring. .
The runout Sd of the inner diameter of the reference end face of the A5 inner ring is measured according to the method specified in GB307.2.
Additional notes:
This standard is proposed by the National Rolling Bearing Standardization Technical Committee. This standard is under the jurisdiction of the Yang Bearing Research Institute of the two mechanical and electronic industry tribes. This standard was jointly drafted by Luoyang Bearing Research Institute and Zhenjiang Bearing Factory. The drafters of this standard are Li Feixue and Zhu Zhiqi. 559
F
心.
1.
1.心
ftm
S.
max
7||tt ||8
1t)
um
.
...
Lower deviation
0
130| |tt||nax
.3
shaft washer
5.3
The tolerance of the shaft washer complies with the requirements in Table 7.
sti,mm
over
10
18
30
50
80
120
5.4 Others
to
18
30
50
80
120
180| |tt||JB/T6644--93
Table? Valve circle
Ad ine
Upper deviation
+50
+61
-1 75
++: 90||tt ||+-107
-125
group includes bearing width tolerance AT.mm.
The screw hole diameter tolerance is selected according to H12.
The screw hole position tolerance is 0.1mm.
Lower deviation
-+32
+40
50
·60
72
85||tt ||Si
max
G1
upper bias
20
Aun
rm
lower bias| |tt||JB/T6644--93
Appendix A
Recommended measurement methods for ATs, Sia, Kin, Kea, Sa (reference parts)
A1 combination bearing actual width Deviation AT. (See Figure A1) Use block gauges or standard parts to compare measurements. The combined bearing is supported by three fulcrums at three equal parts of the center circle of the raceway on the bottom surface of one shaft ring of the combined bearing. The probe is located on the bottom surface of the other shaft ring directly above the fulcrum for measurement. Measure several positions along the circumference and take the average. It is worth getting the width T between the bottom surfaces of the two shaft rings, so
ATT--T
Figure A1
A2 combined bearing end face runout Sia of the raceway makes the combined bearing in the figure In the A1 state, the radial plane of the outer diameter of the measured shaft ring is positioned with a 60° V-shaped block. The outer ring remains stationary, rotate the shaft ring in contact with the probe for more than one turn, and read the difference between the maximum and minimum values; then combine the Turn the bearing over, perform the same measurement, and take the largest of the two differences as the runout Sia of the combined bearing end face to the raceway. The radial runout Ki of the inner ring of the A3 combined bearing (see Figure A2). Install the outer ring assembly and the inner ring of the combined bearing horizontally on a standard taper mandrel, and support the mandrel between two precision tips. Please measure the head At one-third of the width of the outer surface of the outer ring assembly, the outer ring does not rotate, and the mandrel and the inner ring rotate for more than one revolution. The difference between the maximum and minimum values ??measured is the radial runout of the inner ring Kiao||tt| |558
JB/T6644
Figure A2
The outer ring radial runout K of the A4 combined bearing (see Figure A2) 93
The outer ring assembly of the combined bearing Install it horizontally with the inner ring on a tapered mandrel, and support the mandrel between the two precision tips. A probe is placed at one-third of the width of the outer surface of the outer ring assembly. The mandrel does not rotate, and the outer ring does not rotate. For more than one revolution, the difference between the maximum and minimum values ??measured is the radial runout K of the outer ring. .
The runout Sd of the inner diameter of the reference end face of the A5 inner ring is measured according to the method specified in GB307.2.
Additional notes:
This standard is proposed by the National Rolling Bearing Standardization Technical Committee. This standard is under the jurisdiction of the Yang Bearing Research Institute of the two mechanical and electronic industry tribes. This standard was jointly drafted by Luoyang Bearing Research Institute and Zhenjiang Bearing Factory. The drafters of this standard are Li Feixue and Zhu Zhiqi. 559
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