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US Series Set Screw Insert Bearing US205 US206 US207 Narrow Inner Spherical Ball Bearing SNR NTN Interchange

US Series insert bearings

Parameter Item	Standard Specification
Full Model Range	US201 ~ US210 Metric; US204-12 ~ US208-24 Inch Bore
Bearing Type	Single Row Deep Groove Outer Spherical Insert Bearing, Single M6 Set Screw Lock, Narrow Standard Inner Ring
Core Structure	Spherical outer ring (self-aligning ±2°), narrow standard inner ring, single 120° opposite M6 socket set screw locking, single lip NBR rubber seal with metal slinger
Raw Material	Inner/Outer Ring: Vacuum degassed GCr15 chrome steel; G10 precision steel ball; stamped steel cage
Locking Mechanism	Single dual opposite M6 set screws, simple shaft clamping for light & medium vibration equipment
Seal Option	Standard single lip SL seal; double lip TJ seal customizable for dusty workshop
Internal Clearance	CN standard clearance; C3 extra clearance for high-speed light-duty equipment
Precision Grade	P0 standard industrial grade; P6 high precision for food packaging machinery
Load Capacity	Light-medium radial load, tiny bidirectional axial load
Limiting Rotation Speed	Grease lubrication: 3800 ~ 5300 r/min (size dependent)
Operating Temperature	-30℃ ~ +120℃
Interchangeability	Fully interchangeable with SNR, NTN, FYH US series set screw insert bearings
Matching Housings	UCP pillow block, UCF 4-bolt flange, UCFL 2-bolt flange, UCT take-up housing
Certificates	ISO9001, RoHS, REACH
HS Code	84821020000
Core Features	Compact narrow inner ring saves axial installation space; simple dual set screw locking for quick assembly; spherical outer ring compensates mounting misalignment; lightweight low-friction design for light-load conveyors; pre-filled long-life lithium grease with external grease nipple for re-lubrication.

US Series insert bearings Product Features

Narrow standard inner ring structure, smaller axial width than UC/UE wide inner series, perfectly fits compact narrow housing design to reduce overall equipment volume.
Dual opposite M6 socket set screws at 120°, uniform clamping force, quick installation and disassembly without special tools, suitable for low & medium vibration forward-reverse rotation equipment.
Spherical outer ring self-aligning design allows ±2° angular misalignment compensation, eliminates abnormal noise and premature raceway spalling caused by frame assembly deviation.
Standard single lip composite seal with outer metal slinger, blocks dry dust and light water splashing, lightweight low rolling resistance reduces motor power consumption for long continuous operation.
Pre-filled long-life high-temperature lithium complex grease, equipped with external grease nipple for supplementary lubrication; full hardness & noise inspection before shipment, stable mass production delivery.

FAQ

Q1: Can you provide custom bearings?

Yes, we support OEM and custom production based on your drawings, samples, or technical requirements.

Q2: What is the delivery time?

Standard models: 5–10 working days. Custom products: depending on specifications and order quantity.

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Select	Download	Inquiry	Model	Dimensions (mm)							Capacity (kN)			Mass
Select	Download	Inquiry	Model	d	D	B	d₁	D₁	E	r1.2	C	C₀	Pu	kg
			US 203 2S bearing	17	40	12	24.2	32.6	3.6	0.6	7.35	4.75	0.14	0.064
			US 303 2S bearing	17	47	14	26.5	37.6	4.3	0.7	13.5	6.55	0.275	0.14
			US 204 2S bearing	20	47	14	28.2	38.6	4.3	1	12.8	6.6	0.196	0.094
			US 205 2S bearing	25	52	15	33.6	44	4.3	1	14	7.8	0.232	0.116
			US 303 2S bearing	25	62	17	36.6	50.9	5.6	1.1	22.5	11.6	0.49	0.2
			US 206 2S bearing	30	62	16	39.7	51.6	5.1	1	19.5	11.3	0.335	0.18
			US 306 2S bearing	30	72	19	44.6	59.2	6.1	1.1	28.1	16	0.67	0.3
			US 207 2S bearing	35	72	17	46.1	60.5	5.6	1.1	25.5	15.3	0.455	0.28
			US 307 2S bearing	35	80	21	49.5	66.1	7	1.5	33.2	19	0.82	0.4
			US 208 2S bearing	40	80	18	52	67.3	6.1	1.1	32.5	19.8	0.56	0.37
			US 308 2S bearing	40	90	23	56.1	74.7	7.6	1.5	41	24	1.02	0.55
			US 209 2S bearing	45	85	19	56.6	72.6	6.1	1.1	32.5	20.4	0.64	0.4
			US 309 2S bearing	45	100	25	62.1	83.7	7.7	1.5	52.7	31.5	1.34	0.73
			US 210 2S bearing	50	90	20	62.5	78.2	6.4	1.1	35	23.2	0.695	0.45
			US 310 2S bearing	50	110	27	68.7	92.6	7.7	2	61.8	38	1.6	0.95
			US 211 2S bearing	55	100	21	69.1	85.9	7	1.5	43.5	29	0.865	0.6
			US 212 2S bearing	60	110	22	75.5	95	7.7	1.5	52	36	1.06	0.77
			US 213 2S bearing	65	120	23	82.5	102.46	7.6	1.5	57	40	1.73	0.94