30256NSKTapered Roller

Name: NSK 30256 Tapered Roller Bearing
Brand: NSK
SKU: 30256

30256 is a NSK tapered roller bearing, bore 280 mm, O.D. 500 mm, width 80 mm, dynamic rating 279,000 lbs. Dimensions, drawing, interchanges and price.

Request a quote WhatsApp Email us Search the catalog

Bore d280mm

Outside dia. D500mm

Width B80mm

Dynamic Cr279,000lbs

Static C0r427,000lbs

Limiting speed630rpm

Weight66.311kg

Cr / C0r0.65

Mean dia. dm390mm

Original catalogue drawing - NSK catalogue, page 105

30256 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	280	11.0236
D	Outside diameter	500	19.685
B	Inner-ring / bearing width	80	3.1496
T	Overall assembly width	89	3.5039
C	Cup / outer-ring width	67	2.6378

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)	280
Bore d (in)	11.0236
Outside dia. D (mm)	500
Outside dia. D (in)	19.6850
Width B (mm)	80
Width B (in)	3.1496
Overall width T (mm)	89
Overall width T (in)	3.5039
Cup width C (mm)	67
Cup width C (in)	2.6378

Load ratings & speeds

Basic dynamic load rating Cr (lbs)	279000
Basic static load rating Cor (lbs)	427000
Limiting speed - grease (rpm)	630
Limiting speed - oil (rpm)	850

Weight

Weight (kg)	66.311

Mounting dimensions (fillets / shoulders)

Chamfer r (in)	0.16
Shaft shoulder da min (in)	12.323
Housing shoulder Da max (in)	18.819
Shaft shoulder db max (in)	13.346

Bearing life (ISO 281 basic rating life)

C / P	Equivalent load P (N)	L₁₀ (10⁶ rev)	L_10h at 200 rpm
4	310,263	102	8,466
6	206,842	392	32,708
8	155,132	1,024	85,333
10	124,105	2,154	179,536
15	82,737	8,323	693,622

Basic rating life per ISO 281: L₁₀ = (C/P)^10/3 with C = 1,241,054 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.107 (dimensions) / p.108 (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
6256-M	FAG	Ball	280	500	80	425 kN	72.9
NU256-E-M1	FAG	Cylindrical Roller	280	500	80	1400 kN	72.1
NU256-E-TB-M1	FAG	Cylindrical Roller	280	500	80	1400 kN	72.1
30256-XL	FAG	Tapered Roller	280	500	80	1740 kN	66.5

Same dimensions, same brand

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
256	NSK	Cylindrical Roller	280	500	80	257,000 lbs	70.307
NU256	NSK	Cylindrical Roller	280	500	80	1410 kN	70.7

Nearby bore sizes

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
32256	NSK	Tapered Roller	280	500	130	438,000 lbs	109.234
32356	NSK	Tapered Roller	280	580	175	4050 kN	224
HR32056	NSK	Tapered Roller	280	420	87	1450 kN	40.6
HR32056XJ	NSK	Tapered Roller	280	420	87	1,180,000 lbs	40.606
HR32956	NSK	Tapered Roller	280	380	63.5	945 kN	20
HR32956J	NSK	Tapered Roller	280	380	63.5	172,000 lbs	20.003

Request a quotation for 30256

Send us the quantity you need and we will come back with price and lead time, normally within 24 hours. Equivalent parts from other brands can be quoted at the same time.

Online enquiry form richard@bearingsfit.com WhatsApp +86 156 2149 6516