Housing:
- Made of cast iron or stamped steel, the housing provides a sturdy base for the bearing unit.
- It features a four-bolt mounting design, which ensures secure attachment to flat surfaces and enhances stability.
- The housing is designed to absorb vibrations and provide reliable support for the shaft.
Insert Bearing:
- The insert bearing is typically a deep groove ball bearing (model 204).
- Made from high-quality chrome steel (GCr15), it offers excellent durability, wear resistance, and load-carrying capacity.
- The bearing is designed to handle both radial and axial loads, making it versatile for various applications.
Sealing:
- The UCT204 can be equipped with rubber seals (2RS) or metal shields (ZZ) to protect the bearing from contaminants and retain lubrication.
- Seals help extend the bearing’s lifespan by preventing dust, dirt, and moisture from entering.
Lubrication:
- The bearing is pre-lubricated with high-quality grease, ensuring smooth operation and reducing the need for frequent maintenance.
- Lubrication holes or fittings may be provided for easy re-lubrication in some designs.

2. Dimensions of UCT204 Bearing

The UCT204 follows standard dimensions (in millimeters):

Parameter	Dimension (mm)
Bore Diameter (d)	20 mm
Outer Diameter (D)	47 mm
Bearing Width (B)	14 mm
Housing Hole Diameter	20 mm
Overall Length (L)	104 mm
Overall Width (W)	80 mm
Overall Height (H)	46 mm
Mounting Hole Spacing (A)	70 mm
Mounting Hole Diameter (B)	11 mm
Weight	Approximately 0.9 kg

3. Applications of UCT204 Bearing

The UCT204 is widely used in various industries due to its durability and versatility. Common applications include:

Conveyor Systems:
- Used to support rollers and pulleys in material handling equipment.
- Provides reliable performance in industrial environments.
Agricultural Machinery:
- Found in tractors, harvesters, and irrigation systems.
- Withstands harsh conditions such as dust, dirt, and moisture.
Industrial Fans and Blowers:
- Supports rotating shafts in fans and blowers, ensuring smooth and efficient operation.
- Suitable for high-speed applications.
Food Processing Equipment:
- Used in mixers, conveyors, and packaging machines.
- Stainless steel variants are available for corrosion resistance in wet or hygienic environments.
Pumps and Compressors:
- Provides support for rotating shafts in pumps and compressors.
- Handles moderate to heavy loads with ease.
General Machinery:
- Used in various types of machinery where shaft support and alignment are required.
- Ideal for applications with limited space and moderate loads.

UCT Series Pillow Block Ball Bearings Parameters

Wide Application 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.

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
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
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)

Inner Ring									Tolerance in um/s
d mm		Δdmp		9	Vdp²)0,1 Diameter Series	2,3,4	Vdmp	Kia	ΔBs		Vbs
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
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)

Inner Ring									Tolerance in um/s
d mm		Δdmp		Vdp²)Diameter Series		Vdmp	Kia	Sd	Sis³⁾	ΔBs	Vbs
d mm		Δdmp		9	0,1,2,3,4	Vdmp	Kia	Sd	Sis³⁾	ΔBs	Vbs
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
D mm		Δdmp		9	0,1,2,3,4	Vdmp	Kia	SD⁴⁾ SD1⁵⁾	Sea⁴⁾⁵⁾	ΔBs		Vbs
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
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	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
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

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

Company brand KYODO YUSHI	Product	Base oil	Usage range	Characteristics


EXXON	Multemp SRL	Polyol ester+Diester	(-50,+150)	Excellent noise suppressantproperty and extended performance life
	Multemp PS	Diester+Refined mineral oil	(-50,+130)	Excellent low temperature performance,has outstanding noise suppressant property
	Multemp SM-B	Synthetic hydrocarbon	(-50,+200)	Long service life under high temperature,Excellent low temperature performance,has high speed operation,low noise property
	Multemp ET-K	SyntheticEther +Polyol ester	(-40≥,+200)	Has more extended life under high operating temperature condition
MOBILE	Polyrex EM	Mineral grease	(-40,+180)	Long life and high temperature
	Beacon325	Synthetic grease	(-54,+150)	General purpose grease
	Andok C	Channeling petroleum grease	(-27,+120)	Smooth running,long life with minimum migration
CHEVRON	Mobil 28(MIL-G-81322)	Synthetic hydrocarbon	(-54,+177)	Wide temperature range,good low temperature torque
CHEVRON	Mobil HP	Lithium complex	(-30,+110)	Vibration,moderate speed and good corrosion resistance
SHELL	SRI-2	Mineral grease	(-30,+180)	High temperature range,good water resistance
DUPONT	Alvania 2	Mineral grease	(-35,+120)	Long life and high temperature
DUPONT	RLQ #2	Mineral grease	(-50,+150)	Low noise,high speed and high temperature
KLUBER	ASONIC	Synthetic hydrocarbon	(-50,+140)	High temperature stability with good lubricity properties
JINZHI	HANGU 2#	Mineral grease	(-20,+120)	Low noise
JINZHI	HTHS	Mineral grease	(-40,+180)	High speed,low temperature,low torque and low noise

The Radial Clearance of Bearings with Electric Motor Quality

Bore			CM
Over		Including		Min	Max
mm	inch	mm	inch	um	um
10	0.3937	18	0.7087	4	11
18	0.7087	24	0.9449	5	12
24	0.9449	30	1.1811	5	12
30	1.1811	40	1.5748	9	17
40	1.5748	50	1.9685	9	17
50	1.9685	65	2.5591	12	22

Datas of the Mini-deep Groove Bearings Under No Load As Follows:										Tolerance in um
Bore				Inch R Series	C2		NORMAL		C3		C4
Over		Including			C2		NORMAL		C3		C4
mm	inch	mm	inch		min	max	min	max	min	max	min
2.5	0.0984	10	0.3937	R2-R6	0	7	2	13	8	23	14
10	0.3937	18	0.7087	R8-R10	0	9	3	18	11	25	18
18	0.7087	24	0.9449	R12-R14	0	10	5	20	13	58	20
24	0.9449	30	1.1811	R16-18	1	11	5	20	13	28	23
30	1.1811	40	1.5748	R20-R24	1	11	6	20	15	33	28
40	1.5748	50	1.9685		1	11	6	23	18	36	30
50	1.9685	65	2.5591		1	12	8	28	23	43	38

Datas of the Mini-deep Groove Bearings Under No Load As Follows:									Tolerance in um
Clearance Code	MC1		MC2		MC3		MC4		MC5
Clearance	min	max	min	max	min	max	min	max	min	max
Clearance	1	6	4	9	6	11	9	14	15	22

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