30348NSKTapered Roller

Name: NSK 30348 Tapered Roller Bearing
Brand: NSK
SKU: 30348

30348 is a NSK tapered roller bearing, bore 240 mm, O.D. 500 mm, width 95 mm, dynamic rating 373,000 lbs. Dimensions, drawing, interchanges and price.

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Bore d240mm

Outside dia. D500mm

Width B95mm

Dynamic Cr373,000lbs

Static C0r526,000lbs

Limiting speed670rpm

Weight92.614kg

Cr / C0r0.71

Mean dia. dm370mm

Original catalogue drawing - NSK catalogue, page 107

30348 NSK Tapered Roller bearing catalogue drawing

Scanned from the manufacturer catalogue page listing this part number. All part numbers printed on that table share the same drawing.

Scale cross-section

Blue = inner / outer ring, yellow = rolling element. Drawn to scale from this part's own dimensions for selection reference only - not a manufacturing or assembly drawing.

Dimension table (mm / inch)

Symbol	Dimension	mm	inch
d	Bore diameter	240	9.4488
D	Outside diameter	500	19.685
B	Inner-ring / bearing width	95	3.7402
T	Overall assembly width	105	4.1339
C	Cup / outer-ring width	80	3.1496

Notes

Weights are given in kg. Load ratings are shown in both the original catalogue units and the converted value (1 N = 0.2248 lbf). Data is provided for selection reference only - confirm against the latest official catalogue before ordering.

Main dimensions

Bore d (mm)	240
Bore d (in)	9.4488
Outside dia. D (mm)	500
Outside dia. D (in)	19.6850
Width B (mm)	95
Width B (in)	3.7402
Overall width T (mm)	105
Overall width T (in)	4.1339
Cup width C (mm)	80
Cup width C (in)	3.1496

Load ratings & speeds

Basic dynamic load rating Cr (lbs)	373000
Basic static load rating Cor (lbs)	526000
Limiting speed - grease (rpm)	670
Limiting speed - oil (rpm)	950

Weight

Weight (kg)	92.614

Mounting dimensions (fillets / shoulders)

Chamfer r (in)	0.16
Shaft shoulder da min (in)	10.748
Housing shoulder Da max (in)	18.819
Shaft shoulder db max (in)	12.126

Bearing life (ISO 281 basic rating life)

C / P	Equivalent load P (N)	L₁₀ (10⁶ rev)	L_10h at 200 rpm
4	414,797	102	8,466
6	276,531	392	32,708
8	207,398	1,024	85,333
10	165,919	2,154	179,536
15	110,612	8,323	693,622

Basic rating life per ISO 281: L₁₀ = (C/P)^10/3 with C = 1,659,187 N. Hours = L₁₀ x 10⁶ / (60n). Life-modification factors for lubrication, contamination and temperature (a_ISO) are not included.

Source & traceability

Brand	NSK
Source catalogue	NSK inch product catalogue
Catalogue page	p.109 (dimensions) / p.110 (ratings)

Dimensions in inches and millimetres, load ratings in lbs.

Interchange - same dimensions, other brands

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
6348-M	FAG	Ball	240	500	95	465 kN	96.4
QJ348-N2-MPA	FAG	Ball	240	500	95	1020 kN	98.2
NJ348-E-M1	FAG	Cylindrical Roller	240	500	95	1730 kN	97
NJ348-E-TB-M1	FAG	Cylindrical Roller	240	500	95	1720 kN	97
NU348-E-M1	FAG	Cylindrical Roller	240	500	95	1730 kN	95.7
NU348-E-TB-M1	FAG	Cylindrical Roller	240	500	95	1720 kN	95.7
30348	FAG	Tapered Roller	240	500	95	1780 kN	88.6

Same dimensions, same brand

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
6348	NSK	Ball	240	500	95	515 kN	94.4
348	NSK	Cylindrical Roller	240	500	95	306,000 lbs	93.894
NU348	NSK	Cylindrical Roller	240	500	95	1680 kN	94.6

Nearby bore sizes

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
30248	NSK	Tapered Roller	240	440	72	223,000 lbs	45.21
32248	NSK	Tapered Roller	240	440	120	366,000 lbs	78.05
32348	NSK	Tapered Roller	240	500	155	567,000 lbs	145.027
HR32048	NSK	Tapered Roller	240	360	76	1130 kN	26.2
HR32048XJ	NSK	Tapered Roller	240	360	76	920,000 lbs	26.204
HR32948	NSK	Tapered Roller	240	320	51	615 kN	11.1
HR32948J	NSK	Tapered Roller	240	320	51	112,000 lbs	11.104

Request a quotation for 30348

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