HR30221NSKTapered Roller

Name: NSK HR30221 Tapered Roller Bearing
Brand: NSK
SKU: HR30221

HR30221 is a NSK tapered roller bearing, bore 105 mm, O.D. 190 mm, width 36 mm, dynamic rating 345 kN. Dimensions, drawing, interchanges and price.

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Bore d105mm

Outside dia. D190mm

Width B36mm

Dynamic Cr345kN

Static C0r365kN

Limiting speed1,900rpm

Weight4.51kg

Cr / C0r0.95

Mean dia. dm147.5mm

Original catalogue drawing - NSK E1103, page 267

HR30221 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	105	4.1339
D	Outside diameter	190	7.4803
B	Inner-ring / bearing width	36	1.4173
T	Overall assembly width	39	1.5354
C	Cup / outer-ring width	30	1.1811
r	Chamfer (min)	2.5	0.0984

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)	105
Outside dia. D (mm)	190
Width B (mm)	36
Overall width T (mm)	39
Cup width C (mm)	30

Load ratings & speeds

Basic dynamic load rating Cr (lbs)	77559
Basic static load rating Cor (lbs)	82055
Basic dynamic load rating Cr (N)	345000
Basic static load rating C0r (N)	365000
Limiting speed - grease (rpm)	1,900
Effective load centre a (mm)	3

Weight

Weight (kg)	4.51

Mounting dimensions (fillets / shoulders)

Housing fillet r max (mm)	2.5

Bearing life (ISO 281 basic rating life)

C / P	Equivalent load P (N)	L₁₀ (10⁶ rev)	L_10h at 600 rpm
4	86,250	102	2,822
6	57,500	392	10,903
8	43,125	1,024	28,444
10	34,500	2,154	59,845
15	23,000	8,323	231,207

Basic rating life per ISO 281: L₁₀ = (C/P)^10/3 with C = 345,000 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 CAT. No. E1103 (metric)
Catalogue page	p.267 (dimensions)

Load ratings in newtons, weights in kg, limiting speeds for grease and oil lubrication.

Interchange - same dimensions, other brands

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
1221-M	FAG	Ball	105	190	36	75 kN	4.75
6221	FAG	Ball	105	190	36	141 kN	3.88
6221-2RSR	FAG	Ball	105	190	36	141 kN	3.73
6221-2Z	FAG	Ball	105	190	36	141 kN	3.99
QJ221-N2-MPA	FAG	Ball	105	190	36	233 kN	4.81
N221-E-M1	FAG	Cylindrical Roller	105	190	36	310 kN	4.63
N221-E-XL-M1	FAG	Cylindrical Roller	105	190	36	310 kN	4.63
NJ221-E-TVP2	FAG	Cylindrical Roller	105	190	36	310 kN	4.17
NJ221-E-XL-TVP2	FAG	Cylindrical Roller	105	190	36	310 kN	4.17
NU221-E-TVP2	FAG	Cylindrical Roller	105	190	36	310 kN	4.08

Same dimensions, same brand

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
1221	NSK	Ball	105	190	36	82.5 kN	4.43
6221	NSK	Ball	105	190	36	29,900 lbs	3.697
7221B	NSK	Ball	105	190	36	30,400 lbs	4.4
BL221	NSK	Ball	105	190	36	39,200 lbs	4.173
221	NSK	Cylindrical Roller	105	190	36	45,100 lbs	4.051
HR30221J	NSK	Tapered Roller	105	190	36	62,900 lbs	4.509
7221	NSK	Precision / Angular Contact	105	190	36	172 kN	3.84
7221A5	NSK	Precision / Angular Contact	105	190	36	34,800 lbs	3.769

Nearby bore sizes

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
HR30221J	NSK	Tapered Roller	105	190	36	62,900 lbs	4.509
HR30321	NSK	Tapered Roller	105	225	49	560 kN	9.52
HR30321J	NSK	Tapered Roller	105	225	49	102,000 lbs	9.525
HR31321	NSK	Tapered Roller	105	225	53	510 kN	10
HR31321J	NSK	Tapered Roller	105	225	49	76,400 lbs	10.043
HR32021	NSK	Tapered Roller	105	160	35	250 kN	2.48
HR32021XJ	NSK	Tapered Roller	105	160	35	204,000 lbs	2.481
HR32221	NSK	Tapered Roller	105	190	50	445 kN	6.25

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