UCF201 Main Dimensions:
| Parameter |
Dimension (mm) |
| Bore Diameter (d) |
12 mm |
| Outer Diameter (D) |
37 mm |
| Bearing Width (B) |
26 mm |
| Base Dimensions (A × B × H) |
70 × 40 × 50 mm |
| Mounting Hole Spacing (J) |
60 mm |
| Mounting Hole Diameter (S) |
9 mm |
Dimension Diagram Description:
-
Bore Diameter (d): 12 mm, suitable for a shaft with a diameter of 12 mm.
-
Outer Diameter (D): 37 mm, indicating the diameter of the bearing's outer ring.
-
Bearing Width (B): 26 mm, representing the width of the bearing.
-
Base Dimensions (A × B × H): 70 mm (length) × 40 mm (width) × 50 mm (height), indicating the size of the square housing.
-
Mounting Hole Spacing (J): 60 mm, representing the center-to-center distance of the mounting holes.
-
Mounting Hole Diameter (S): 9 mm, indicating the diameter of the mounting bo
Precision Comparison Table:
| Precision Grade |
ABEC Standard |
GB Standard (China) |
Description |
| Z3 |
ABEC-3 |
P6 |
High precision, suitable for applications requiring smooth operation and low noise. |
| Z4 |
ABEC-5 |
P5 |
Very high precision, used in high-speed and high-accuracy applications. |
Advantages of Z3 and Z4 Bearings
-
High Precision:
-
Z3 and Z4 bearings are manufactured to tight tolerances, ensuring smooth and consistent performance.
-
Z4 offers higher precision than Z3, making it suitable for more demanding applications.
-
Low Noise and Vibration:
-
High-Speed Capability:
-
Durability:
-
Versatility:
-
Suitable for a wide range of industries, including automotive, aerospace, medical equipment, and precision machinery.
Applications of Z3 and Z4 Bearings
-
Z3 Bearings:
-
Electric Motors: Used in small to medium-sized motors for smooth and quiet operation.
-
Household Appliances: Found in washing machines, refrigerators, and air conditioners.
-
Office Equipment: Used in printers, scanners, and copiers for reliable performance.
-
General Industrial Machinery: Suitable for pumps, fans, and light-duty machinery.
-
Z4 Bearings:
-
High-Speed Machinery: Used in machine tools, spindles, and robotics for high-speed and high-precision operations.
-
Medical Equipment: Essential for MRI machines, dental drills, and other precision medical devices.
-
Aerospace: Used in aircraft components where precision and reliability are critical.
-
Automotive: Found in transmissions, wheel hubs, and electric vehicle motors for high performance.


UCF Series Pillow Block Ball Bearings Parameters


ABEC-1 Tolerance Class ABEC-1 (P0)
|
Inner Ring
|
Tolerance in um/s
|
|
d mm
|
Δdmp
|
9
|
Vdp²)0,1 Diameter Series
|
2,3,4
|
Vdmp
|
Kia
|
ΔBs
|
Vbs
|
|
over
|
including
|
high
|
low
|
max
|
max
|
max
|
high
|
low
|
max
|
|
1)0.6
|
2.5
|
0
|
-8
|
10
|
8
|
6
|
6
|
10
|
0
|
-40
|
12
|
|
2.5
|
10
|
0
|
-8
|
10
|
8
|
6
|
6
|
10
|
0
|
-120
|
15
|
|
10
|
18
|
0
|
-8
|
10
|
8
|
6
|
6
|
10
|
0
|
-120
|
20
|
|
18
|
30
|
0
|
-10
|
13
|
10
|
8
|
8
|
13
|
0
|
-120
|
20
|
|
30
|
50
|
0
|
-12
|
15
|
12
|
9
|
9
|
15
|
0
|
-120
|
20
|
|
50
|
80
|
0
|
-15
|
19
|
19
|
11
|
11
|
20
|
0
|
-150
|
25
|
|
Outer Ring
|
Tolerance in um/s
|
|
D mm
|
Δdmp
|
VDp2)4)Open Bearings Diameter Series
|
Capped Bearings2)3)
|
Vdmp
|
Kia
|
ΔBs
|
Vbs
|
|
9
|
0,1
|
2,3,4
|
2,3,4
|
|
over
|
including
|
high
|
low
|
max
|
max
|
max
|
high
|
low
|
max
|
|
1)2.5
|
6
|
0
|
-8
|
10
|
8
|
6
|
10
|
6
|
15
|
Identical to ΔBs and VBs of inner ring of same bearing
|
|
6
|
18
|
0
|
-8
|
10
|
8
|
6
|
10
|
6
|
15
|
|
18
|
30
|
0
|
-9
|
12
|
9
|
7
|
12
|
7
|
15
|
|
30
|
50
|
0
|
-11
|
14
|
11
|
8
|
16
|
8
|
20
|
|
50
|
80
|
0
|
-13
|
16
|
13
|
10
|
20
|
10
|
25
|
|
80
|
120
|
0
|
-15
|
19
|
19
|
11
|
26
|
11
|
35
|
|
120
|
150
|
0
|
-18
|
23
|
23
|
14
|
30
|
14
|
40
|
ABEC-3 Tolerance Class ABEC-3 (P6)
|
Inner Ring
|
Tolerance in um/s
|
|
d mm
|
Δdmp
|
9
|
Vdp²)0,1 Diameter Series
|
2,3,4
|
Vdmp
|
Kia
|
ΔBs
|
Vbs
|
|
over
|
including
|
high
|
low
|
max
|
max
|
max
|
high
|
low
|
max
|
|
11)0.6
|
2.5
|
0
|
-7
|
9
|
7
|
5
|
5
|
5
|
0
|
-40
|
12
|
|
2.5
|
10
|
0
|
-7
|
9
|
7
|
5
|
5
|
6
|
0
|
-120
|
15
|
|
10
|
18
|
0
|
-7
|
9
|
7
|
5
|
5
|
7
|
0
|
-120
|
20
|
|
18
|
30
|
0
|
-8
|
10
|
8
|
6
|
6
|
8
|
0
|
-120
|
20
|
|
30
|
50
|
0
|
-10
|
13
|
10
|
8
|
8
|
10
|
0
|
-120
|
20
|
|
50
|
80
|
0
|
-12
|
15
|
15
|
9
|
9
|
10
|
0
|
-150
|
25
|
|
Outer Ring
|
Tolerance in um/s
|
|
D mm
|
Δdmp
|
VDp2)4)Open Bearings Diameter Series
|
Capped Bearings2)3)
|
Vdmp
|
Kia
|
ΔBs
|
Vbs
|
|
9
|
0,1
|
2,3,4
|
2,3,4
|
|
over
|
including
|
high
|
low
|
max
|
max
|
max
|
high
|
low
|
max
|
|
1)2.5
|
6
|
0
|
-7
|
9
|
7
|
5
|
9
|
5
|
8
|
Identical to ΔBs and VBs of inner ring of same bearing
|
|
6
|
18
|
0
|
-7
|
9
|
7
|
5
|
9
|
5
|
8
|
|
18
|
30
|
0
|
-8
|
10
|
8
|
6
|
10
|
6
|
9
|
|
30
|
50
|
0
|
-9
|
11
|
9
|
7
|
13
|
7
|
10
|
|
50
|
80
|
0
|
-11
|
14
|
11
|
8
|
16
|
8
|
13
|
|
80
|
120
|
0
|
-13
|
16
|
16
|
10
|
20
|
10
|
18
|
|
120
|
150
|
0
|
-15
|
19
|
19
|
11
|
25
|
11
|
20
|
ABEC-5 Tolerance Class ABEC-5 (P5)
|
Inner Ring
|
Tolerance in um/s
|
|
d mm
|
Δdmp
|
Vdp²)Diameter Series
|
Vdmp
|
Kia
|
Sd
|
Sis3)
|
ΔBs
|
Vbs
|
|
9
|
0,1,2,3,4
|
|
over
|
including
|
high
|
low
|
max
|
3
|
max
|
max
|
max
|
High
|
Low
|
max
|
|
1)0.6
|
2.5
|
0
|
-5
|
5
|
4
|
3
|
4
|
7
|
7
|
0
|
-40
|
5
|
|
2.5
|
10
|
0
|
-5
|
5
|
4
|
3
|
4
|
7
|
7
|
0
|
-40
|
5
|
|
10
|
18
|
0
|
-5
|
5
|
4
|
3
|
4
|
7
|
7
|
0
|
-80
|
5
|
|
18
|
30
|
0
|
-6
|
6
|
5
|
3
|
4
|
8
|
8
|
0
|
-120
|
5
|
|
30
|
50
|
0
|
-8
|
8
|
6
|
4
|
5
|
8
|
8
|
0
|
-120
|
5
|
|
50
|
80
|
0
|
-9
|
9
|
7
|
5
|
5
|
8
|
8
|
0
|
-150
|
6
|
|
Outer Ring
|
Tolerance in um/s
|
|
D mm
|
Δdmp
|
Vdp²)Diameter Series
|
Vdmp
|
Kia
|
SD4) SD15)
|
Sea4)5)
|
ΔBs
|
Vbs
|
|
9
|
0,1,2,3,4
|
|
over
|
including
|
high
|
low
|
max
|
|
max
|
max
|
max
|
High
|
Low
|
max
|
|
1)2.5
|
6
|
0
|
-5
|
5
|
4
|
3
|
5
|
8
|
8
|
|
5
|
|
6
|
18
|
0
|
-5
|
5
|
4
|
3
|
5
|
8
|
8
|
5
|
|
18
|
30
|
0
|
-6
|
6
|
5
|
3
|
6
|
8
|
8
|
5
|
|
30
|
50
|
0
|
-7
|
7
|
5
|
4
|
7
|
8
|
8
|
5
|
|
50
|
80
|
0
|
-9
|
9
|
7
|
5
|
8
|
8
|
10
|
6
|
|
80
|
120
|
0
|
-10
|
10
|
8
|
5
|
10
|
9
|
11
|
8
|
|
120
|
150
|
0
|
-11
|
11
|
8
|
6
|
11
|
10
|
13
|
8
|
ABEC-7 Tolerance Class ABEC-7 (P4)
|
Inner Ring
|
Tolerance in um/s
|
|
d mm
|
Δdmp
|
Δds
|
Vdp²)Diameter Series
|
Vdmp
|
Kia
|
Sd
|
Sia
|
ΔBs
|
Vbs
|
|
7,8,9
|
1,7,2,3,4
|
|
over
|
including
|
high
|
low
|
high
|
low
|
max
|
max
|
max
|
max
|
max
|
High
|
low
|
Low
|
max
|
|
1)0.6
|
2.5
|
0
|
-4
|
0
|
-4
|
4
|
3
|
2
|
2.5
|
3
|
3
|
0
|
-40
|
-40
|
2.5
|
|
2.5
|
10
|
0
|
-4
|
0
|
-4
|
4
|
3
|
2
|
2.5
|
3
|
3
|
0
|
-40
|
-40
|
2.5
|
|
10
|
18
|
0
|
-4
|
0
|
-4
|
4
|
3
|
2
|
2.5
|
3
|
3
|
0
|
-80
|
-80
|
2.5
|
|
18
|
30
|
0
|
-5
|
0
|
-5
|
5
|
4
|
2.5
|
3
|
4
|
4
|
0
|
-120
|
-120
|
2.5
|
|
30
|
50
|
0
|
-6
|
0
|
-5
|
6
|
4
|
3
|
4
|
4
|
4
|
0
|
-120
|
-120
|
3
|
|
50
|
80
|
0
|
-7
|
0
|
-5
|
7
|
5
|
3.5
|
4
|
5
|
5
|
0
|
-150
|
-150
|
4
|
|
Outer Ring
|
Tolerance in um/s
|
|
D mm
|
Δdmp
|
Δds
|
Vdp²)Diameter Series
|
Vdmp
|
Kia
|
Sd
|
Sia
|
ΔBs
|
Vbs
|
|
7,8,9
|
1,7,2,3,4
|
|
over
|
including
|
high
|
low
|
high
|
low
|
max
|
max
|
max
|
max
|
max
|
High
|
low
|
max |
|
1)2.5
|
6
|
0
|
-4
|
0
|
-4
|
4
|
3
|
2
|
3
|
4
|
5
|
Identical to ΔBs and VBs of inner ring of same bearing
|
2.5
|
|
6
|
18
|
0
|
-4
|
0
|
-4
|
4
|
3
|
2
|
3
|
4
|
5
|
2.5
|
|
18
|
30
|
0
|
-5
|
0
|
-5
|
5
|
4
|
2.5
|
4
|
4
|
5
|
2.5
|
|
30
|
50
|
0
|
-6
|
0
|
-6
|
6
|
5
|
3
|
5
|
4
|
5
|
2.5
|
|
50
|
80
|
0
|
-7
|
0
|
-7
|
7
|
5
|
3.5
|
5
|
4
|
5
|
3
|
|
80
|
120
|
0
|
-8
|
0
|
-8
|
8
|
6
|
4
|
6
|
5
|
6
|
4
|
|
120
|
150
|
0
|
-9
|
0
|
-9
|
9
|
7
|
5
|
7
|
5
|
7
|
5
|

Tolerance Data for Vibration of Single Bearing
|
D
|
V
|
V1
|
V2
|
V3
|
V4
|
|
mm
|
Low
|
Medium
|
High
|
Low
|
Medium
|
High
|
Low
|
Medium
|
High
|
Low
|
Medium
|
High
|
Low
|
Medium
|
High
|
|
3,4
|
80
|
44
|
44
|
60
|
35
|
32
|
48
|
26
|
22
|
31
|
16
|
15
|
28
|
10
|
10
|
|
5,6
|
110
|
72
|
60
|
74
|
48
|
40
|
58
|
36
|
30
|
35
|
21
|
18
|
32
|
11
|
11
|
|
7,8,9
|
130
|
96
|
80
|
92
|
66
|
54
|
72
|
48
|
40
|
44
|
28
|
24
|
38
|
12
|
12
|
|
10,12
|
160
|
120
|
100
|
120
|
80
|
70
|
90
|
60
|
50
|
55
|
35
|
30
|
45
|
14
|
15
|
|
15
|
210
|
150
|
120
|
150
|
100
|
85
|
110
|
78
|
60
|
65
|
46
|
35
|
52
|
18
|
18
|
|
17
|
210
|
150
|
120
|
150
|
100
|
85
|
110
|
78
|
60
|
65
|
46
|
35
|
52
|
25
|
25
|
|
20
|
260
|
190
|
150
|
180
|
125
|
100
|
130
|
100
|
75
|
80
|
60
|
45
|
60
|
25
|
25
|
|
22,25
|
260
|
190
|
150
|
180
|
125
|
100
|
130
|
100
|
75
|
80
|
60
|
45
|
60
|
30
|
32
|
|
28
|
260
|
190
|
150
|
180
|
125
|
100
|
130
|
100
|
75
|
80
|
60
|
45
|
60
|
35
|
40
|
|
30,32
|
300
|
240
|
190
|
200
|
150
|
130
|
150
|
120
|
100
|
90
|
75
|
60
|
70
|
35
|
40
|
|
35
|
300
|
240
|
190
|
200
|
150
|
130
|
150
|
120
|
100
|
90
|
75
|
60
|
70
|
42
|
45
|
|
40
|
360
|
300
|
260
|
240
|
180
|
160
|
180
|
150
|
130
|
110
|
90
|
80
|
82
|
50
|
50
|
|
45
|
360
|
300
|
260
|
240
|
180
|
160
|
180
|
150
|
130
|
110
|
90
|
80
|
82
|
60
|
60
|
|
50
|
420
|
320
|
320
|
280
|
200
|
200
|
210
|
160
|
160
|
125
|
100
|
100
|
95
|
70
|
70
|
Maximum Vibration Acceleration of Single Bearing
|
D
|
Diameter Series(0)
|
Diameter Series(2) |
Diameter Series(3) |
|
mm
|
Z
|
Z1
|
Z2
|
Z3
|
Z
|
Z1
|
Z2
|
Z3
|
Z4
|
Z
|
Z1
|
Z2
|
Z3
|
Z4
|
|
3
|
35
|
34
|
32
|
28
|
36
|
35
|
32
|
30
|
-
|
37
|
36
|
33
|
31
|
-
|
|
4
|
35
|
34
|
32
|
28
|
36
|
35
|
32
|
30
|
-
|
37
|
36
|
33
|
31
|
-
|
|
5
|
37
|
36
|
34
|
30
|
38
|
37
|
34
|
32
|
-
|
39
|
37
|
35
|
33
|
-
|
|
6
|
37
|
36
|
34
|
30
|
38
|
37
|
34
|
32
|
-
|
39
|
37
|
35
|
33
|
-
|
|
7
|
39
|
38
|
35
|
31
|
40
|
38
|
36
|
34
|
-
|
-
|
-
|
-
|
-
|
-
|
|
8
|
39
|
38
|
35
|
31
|
40
|
38
|
36
|
34
|
-
|
-
|
-
|
-
|
-
|
-
|
|
9
|
41
|
40
|
36
|
32
|
42
|
40
|
37
|
35
|
-
|
-
|
-
|
-
|
-
|
-
|
|
10
|
43
|
42
|
38
|
33
|
44
|
42
|
39
|
35
|
30
|
37
|
44
|
40
|
37
|
32
|
|
12
|
44
|
43
|
39
|
34
|
45
|
43
|
39
|
35
|
30
|
47
|
45
|
40
|
37
|
32
|
|
15
|
45
|
44
|
40
|
35
|
46
|
44
|
41
|
36
|
31
|
48
|
46
|
42
|
38
|
33
|
|
17
|
46
|
44
|
40
|
35
|
47
|
45
|
41
|
36
|
31
|
49
|
47
|
42
|
38
|
33
|
|
20
|
47
|
45
|
41
|
36
|
48
|
46
|
42
|
38
|
33
|
50
|
48
|
43
|
39
|
34
|
|
22
|
47
|
45
|
41
|
36
|
48
|
46
|
42
|
38
|
33
|
50
|
48
|
43
|
39
|
34
|
|
25
|
48
|
46
|
42
|
38
|
49
|
47
|
43
|
40
|
36
|
51
|
49
|
44
|
41
|
37
|
|
28
|
49
|
47
|
43
|
39
|
50
|
48
|
44
|
41
|
37
|
52
|
50
|
45
|
42
|
38
|
|
30
|
49
|
47
|
43
|
39
|
50
|
48
|
44
|
41
|
37
|
52
|
50
|
45
|
42
|
38
|
|
32
|
50
|
48
|
44
|
40
|
51
|
49
|
45
|
42
|
38
|
53
|
51
|
46
|
43
|
39
|
|
35
|
51
|
49
|
45
|
41
|
52
|
50
|
46
|
43
|
39
|
54
|
52
|
47
|
44
|
40
|
|
40
|
53
|
51
|
46
|
42
|
54
|
52
|
47
|
44
|
40
|
56
|
54
|
49
|
45
|
41
|
|
45
|
55
|
53
|
48
|
45
|
56
|
54
|
49
|
46
|
43
|
58
|
56
|
51
|
47
|
44
|
|
50
|
57
|
54
|
50
|
47
|
58
|
55
|
51
|
48
|
45
|
60
|
57
|
53
|
49
|
46
|
|
55
|
59
|
56
|
52
|
49
|
60
|
57
|
53
|
50
|
47
|
62
|
59
|
54
|
51
|
48
|
|
60
|
61
|
58
|
54
|
51
|
62
|
59
|
54
|
51
|
48
|
|
61
|
56
|
53
|
50 |
Wide Applications of Pillow Block Bearings

Customization Welcomed:
-
We can printing your brand (logo,artwork)on the shield or laser engraving your brand on the shield.
-
We can custom your packaging according to your design.
-
All copyright owned by clients and we promised don't disclose any information.
Packing and Shipping:
-
The deep groove ball bearings will be securely packaged individually, or tube packing or packed as customization packing
-
Shipping method is negotiable.
