Custom N300 Series Cylindrical Roller Bearings Manufacturers, Factory

N300 Series

N series cylindrical roller bearings are an efficient and durable bearing type that are widely used in various mechanical equipment. The design feature of this series of bearings is that the rollers are cylindrical, capable of withstanding large radial loads, and are suitable for high-speed rotation situations. N series bearings usually have an inner ring and an outer ring. The width of the inner ring is larger than that of the outer ring, which provides better stability and load distribution. Its main advantages include low friction, long service life and high load-bearing capacity. In addition, this kind of bearing is easy to install and suitable for environments with heavy loads and large vibrations. Due to their excellent performance, N series cylindrical roller bearings are widely used in industrial machinery, automobiles, wind turbines and other heavy equipment.

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N300 Series Cylindrical Roller Bearings for Heavy-Duty Applications

Our N300 series cylindrical roller bearings deliver exceptional radial load capacity and durability for demanding industrial applications. Engineered with precision-ground rollers and raceways, these bearings provide reliable performance in harsh operating conditions.

Superior load capacity: Designed to handle heavy radial loads with optimized roller/raceway profiles
Extended service life: Premium steel construction with advanced heat treatment processes
Versatile mounting options: Available in NU, NJ, NUP, N, and NF designs for different shaft requirements
High-speed capability: Precision manufacturing ensures smooth operation at elevated speeds
Reduced friction: Optimized internal geometry minimizes energy losses

Technical Specifications

Parameter	Specification
Bearing Series	N300 (including NU304-NU344, NJ304-NJ344, etc.)
Bore Diameter Range	20mm - 220mm
Outer Diameter Range	52mm - 460mm
Width Range	15mm - 145mm
Dynamic Load Rating (C)	Up to 1,050kN
Static Load Rating (C0)	Up to 1,120kN
Speed Rating (Grease)	Up to 4,500 rpm
Speed Rating (Oil)	Up to 6,300 rpm
Cage Types	Steel, brass, or polyamide

Our N300 cylindrical roller bearings are widely used in:

Heavy machinery: Construction equipment, mining machinery, and material handling systems
Power transmission: Gearboxes, driveshafts, and industrial gear drives
Electric motors: Large industrial motors and generators
Pump systems: Centrifugal pumps and compressor applications
Steel mills: Rolling mills and continuous casting equipment

Why Choose Our N300 Series Bearings?

When you select our N300 series cylindrical roller bearings, you benefit from:

Precision manufacturing: Tight tolerances (ISO P6 or P5 available) for consistent performance
Custom solutions: Available in various clearance levels and special coatings
Global availability: Fast delivery from our worldwide distribution network
Technical support: Expert assistance for bearing selection and application engineering
Quality assurance: Full traceability and ISO 9001 certified production

Proper Maintenance Recommendations

To maximize the lifespan of your N300 cylindrical roller bearings:

Use appropriate lubrication (grease or oil) based on operating conditions
Maintain proper alignment during installation
Monitor vibration and temperature regularly
Follow recommended relubrication intervals
Protect bearings from contamination during storage and operation

Contact our engineering team today for assistance in selecting the perfect N300 series cylindrical roller bearing for your specific application requirements.

Designation	Principal Dimensions(mm)					Basic Load Ratings(KN)		Limited Speed(rpm)		Weight
Designation	d	D	B	rs min	rs1min	Dynamic(Cr)	Static(Cor)	Grease	Oil	(kg)
N308	40	90	23	1.5	1.5	58.5	57	8000	9400	0.643
N309	45	100	25	1.5	1.5	74	71	7200	8400	0.857
N310	50	110	27	2	2	87	86	6500	7700	1.11
N311	55	120	29	2	2	111	111	5900	7000	1.42
N312	60	130	31	2.1	2.1	124	126	5500	6500	1.76
N313	65	140	33	2.1	2.1	135	139	5100	6000	2.18
N314	70	150	35	2.1	2.1	158	168	4700	5500	2.65
N315	75	160	37	2.1	2.1	190	205	4400	5200	3.21
N316	80	170	39	2.1	2.1	190	207	4100	4800	3.77
N317	85	180	41	3	3	212	228	3900	4600	4.44
N318	90	190	43	3	3	240	265	3700	4300	5.18
N319	95	200	45	3	3	259	285	3400	4000	5.99
N320	100	215	47	3	3	299	335	3300	3800	7.32
N321	105	225	49	3	3	320	360	3100	3700	8.33
N322	110	240	50	3	3	360	400	3000	3500	9.77
N324	120	260	55	3	3	450	510	2700	3200	12.5
N326	130	280	58	4	4	560	665	2500	2900	17
N328	140	300	62	4	4	615	745	2300	2700	20.7
N330	150	320	65	4	4	665	805	2100	2500	24.7

N300 Series

N300 Series Cylindrical Roller Bearings for Heavy-Duty Applications

Technical Specifications

Why Choose Our N300 Series Bearings?

Proper Maintenance Recommendations

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