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