N / NF / NU / NJ / NUP 300E Series Cylindrical Roller Bearings – Single Row
GBC-supplied N/NF/NU/NJ/NUP 300E series single-row cylindrical roller bearings, N303E to N317E, d 17–85 mm. Includes EM, EK, ENV and ENP variants. Interchangeable with SKF, FAG, NSK and Koyo
MOQ: 50 pcs. Minimum order value USD 1,500; mixed orders and trial quantities welcome.
CYLINDRICAL ROLLER BEARINGS — N/NF/NU/NJ/NUP 300E SERIES
Series Overview
The 300E series cylindrical roller bearings cover bore diameters from 17 mm to 85 mm in the 300 series heavy cross-section dimension class. Compared to the 200E series, the 300E has a larger outer diameter and wider B-dimension for any given bore, resulting in higher radial load ratings.
In addition to standard E cage variants, the 300E series includes specialist types: EM (brass cage), EK (tapered bore for adapter sleeve mounting), ENV (ceramic hybrid) and ENP (polymer cage for reduced noise).
All standard E variants are interchangeable with SKF, FAG, NSK and Koyo 300E equivalents. Supplied by GBC, MOQ 100 pieces.
Key Design Features
Higher radial load than 200E at same bore
The 300E heavy cross-section provides substantially higher radial load ratings than the 200E at equivalent bore sizes.
N / NF / NU / NJ / NUP + EM / EK / ENV / ENP variants
Standard cage variants plus specialist types: EM (brass cage, high temp/speed), EK (tapered bore), ENV (ceramic hybrid), ENP (polymer cage, low noise).
EM suffix — brass cage for elevated performance
Precision-machined brass cage improves performance at elevated temperatures and speeds in demanding environments.
Separable inner and outer rings
Inner and outer rings separate independently for staged installation.
Boundary dimensions: d bore · D outer diameter · T / B width (mm)
Complete Specification Table
Dimensions in mm · Speed in rpm · Load ratings in kN · Weight in kg
N303E to N310E — d 17–50 mm (standard and specialist variants)
| Bearing No. | d | D | B | Grease rpm | Oil rpm | Dynamic (kN) | Static (kN) | Weight (kg) |
|---|---|---|---|---|---|---|---|---|
| N303E / NU303E / NJ303E / NUP303E | 17 | 47 | 14 | 13,000 | 15,000 | 24.646 | 24.164 | 0.139 |
| N304E / NF304E / NU304E / NJ304E / NUP304E | 20 | 52 | 15 | 14,000 | 17,000 | 23.1 | 19.2 | 0.149 |
| N305E / NF305E / NU305E / NJ305E / NUP305E | 25 | 62 | 17 | 9,000 | 12,000 | 38.5 | 35.8 | 0.24 |
| N306E / NF306E / NU306E / NJ306E / NUP306E | 30 | 72 | 19 | 8,000 | 10,000 | 49.2 | 48.2 | 0.38 |
| N307E / NF307E / NU307E / NJ307E / NUP307E | 35 | 80 | 21 | 7,000 | 9,000 | 62.0 | 63.2 | 0.49 |
| N308E / NF308E / NU308E / NJ308E / NUP308E | 40 | 90 | 23 | 6,300 | 8,000 | 76.8 | 77.8 | 0.65 |
| N309E / NF309E / NU309E / NJ309E / NUP309E | 45 | 100 | 25 | 5,600 | 7,000 | 93.0 | 98.0 | 0.95 |
| N310E / NF310E / NU310E / NJ310E / NUP310E | 50 | 110 | 27 | 5,300 | 6,700 | 105.0 | 112.0 | 1.2 |
| NJ310EK (tapered bore) | 50 | 110 | 27 | 3,500 | 4,800 | 154.2 | 139.1 | 1.22 |
| NUP310ENV (ceramic hybrid) | 50 | 110 | 27 | 5,300 | 6,700 | 105.0 | 112.0 | 1.23 |
N311E to N317E — d 55–85 mm (standard and specialist variants)
| Bearing No. | d | D | B | Grease rpm | Oil rpm | Dynamic (kN) | Static (kN) | Weight (kg) |
|---|---|---|---|---|---|---|---|---|
| N311E / N311EM / NF311E / NU311E / NJ311E / NUP311E | 55 | 120 | 29 | 4,800 | 6,000 | 128.0 | 138.0 | 1.61 |
| NUP311ENV (ceramic hybrid) | 55 | 120 | 29 | 3,200 | 4,500 | 163.4 | 178.9 | 1.54 |
| N312E / N312EM / NF312E / NU312E / NJ312E / NUP312E | 60 | 130 | 31 | 4,500 | 5,600 | 142.0 | 155.0 | 1.94 |
| N313E / N313EM / NF313E / NU313E / NJ313E / NUP313E | 65 | 140 | 33 | 4,000 | 5,000 | 170.0 | 188.0 | 2.42 |
| NUP313EK | 65 | 140 | 33 | 4,000 | 5,000 | 170.0 | 188.0 | 2.36 |
| N314E / N314EM / NF314E / NU314E / NJ314E / NUP314E | 70 | 150 | 35 | 3,800 | 4,800 | 195.0 | 220.0 | 2.9 |
| NUP314EK (tapered bore) | 70 | 150 | 35 | 2,900 | 3,700 | 216.4 | 254.1 | 3.02 |
| N315E / N315EM / NF315E / NU315E / NJ315E / NUP315E | 75 | 160 | 37 | 3,600 | 4,500 | 228.0 | 260.0 | 3.59 |
| NUP315ENP (polymer cage) | 75 | 160 | 37 | 3,000 | 4,000 | 239.3 | 284.9 | 4.05 |
| N316E / N316EM / NF316E / NU316E / NJ316E / NUP316E | 80 | 170 | 39 | 3,400 | 4,300 | 245.0 | 270.0 | 3.9 |
| N317E / N317EM / NF317E / NU317E / NJ317E / NUP317E | 85 | 180 | 41 | 3,200 | 4,000 | 265.0 | 280.0 | 5.2 |
Typical Applications
The 300E series is chosen when the 200E load rating is insufficient but the bore size is correct.
Machine tool spindles
Lathe, milling and boring machine spindle bearings requiring high radial accuracy
Large electric motors
Heavy industrial motor shaft support where elevated radial loads exceed 200E ratings
Heavy industrial gearboxes
Large gearbox intermediate and output shaft bearings, high-reduction drives
High-output pumps
Large pump shaft support under elevated radial loading
Railway traction
Traction motor armature bearings, gearbox shaft bearings in rail vehicles
Steel and heavy industry
Rolling mill auxiliary drive bearings, steel processing machinery shafts
Need 300E series cylindrical roller bearings?
Contact us for pricing in all cage configurations including EM, EK, ENV and ENP variants.
GBC-supplied N/NF/NU/NJ/NUP 300E series single-row cylindrical roller bearings, N303E to N317E, d 17–85 mm. Includes EM, EK, ENV and ENP variants. Interchangeable with SKF, FAG, NSK and Koyo
MOQ: 50 pcs. Minimum order value USD 1,500; mixed orders and trial quantities welcome.
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