Pillow Block Ball Bearings UCP201 UCP204 UCP205
Introduction to UCP Series Spherical Bearings
The UCP series pillow block bearings are renowned for their durability, ease of installation, and versatility. These bearings are designed to accommodate misalignment and heavy loads, making them ideal for various industrial applications such as conveyors, agricultural machinery, and material handling equipment.
Comparison of UCP201 and UCP204 Bearings
Feature | UCP201 Bearing | UCP204 Bearing |
Load Capacity | Moderate | High |
Size | Compact | Larger |
Application | Light to medium-duty applications | Heavy-duty applications |
Cost | Lower | Higher |
Durability | Good | Excellent |
Conclusion
UCP201 and UCP204 pillow block bearings each provide distinct benefits tailored to specific application needs. The UCP201 is an economical choice for lighter load applications, whereas the UCP204 is better suited for heavy-duty conditions.

UCP Series Pillow Block Bearing Parameters

Wide Applications of Pillow Block Bearings
- Industrial Machinery
- Agriculture
- Construction and Mining
- Automotive and Transportation
- Energy and Power Generation
- HVAC Systems
- Marine and Shipbuilding
- Paper and Pulp Industry
- General Manufacturing
Customization Welcomed:
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We can printing your brand (logo,artwork)on the shield or laser engraving your brand on the shield.
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We can custom your packaging according to your design.
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All copyright owned by clients and we promised don't disclose any information.
Packing and Shipping:
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The deep groove ball bearings will be securely packaged individually, or tube packing or packed as customization packing
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Shipping method is negotiable.
Other Technical Data of Bearings

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 |