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 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.

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:
- The precise manufacturing process reduces noise and vibration, making these bearings ideal for applications where quiet operation is essential.
High-Speed Capability:
- Z3 and Z4 bearings are designed to operate at high speeds with minimal friction, ensuring efficiency and longevity.
Durability:
- The high-quality materials and precision manufacturing enhance the durability and load-carrying capacity of these bearings.
Versatility:
- Suitable for a wide range of industries, including automotive, aerospace, medical equipment, and precision machinery.

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)

Outer Ring									Tolerance in um/s
D mm		Δdmp		VDp²)⁴)Open Bearings Diameter Series			Capped Bearings²)³)	Vdmp	Kia	ΔBs		Vbs
D mm		Δdmp		9	0,1	2,3,4	2,3,4	Vdmp	Kia	ΔBs		Vbs
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)

Outer Ring									Tolerance in um/s
D mm		Δdmp		VDp²)⁴)Open Bearings Diameter Series			Capped Bearings²)³)	Vdmp	Kia	ΔBs		Vbs
D mm		Δdmp		9	0,1	2,3,4	2,3,4	Vdmp	Kia	ΔBs		Vbs
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)

ABEC-7 Tolerance Class ABEC-7 (P4)

Outer Ring												Tolerance in um/s
D mm		Δdmp		Δds		Vdp²)Diameter Series		Vdmp	Kia	Sd	Sia	ΔBs		Vbs
D mm		Δdmp		Δds		7,8,9	1,7,2,3,4	Vdmp	Kia	Sd	Sia	ΔBs		Vbs
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

Maximum Vibration Acceleration of Single Bearing

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.

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