6218NSKBall

Name: NSK 6218 Ball Bearing
Brand: NSK
SKU: 6218

6218 is a NSK ball bearing, bore 90 mm, O.D. 160 mm, width 30 mm, dynamic rating 21,600 lbs. Dimensions, drawing, interchanges and price.

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Bore d90mm

Outside dia. D160mm

Width B30mm

Dynamic Cr21,600lbs

Static C0r16,100lbs

Limiting speed4,000rpm

Weight2.15kg

Cr / C0r1.34

Mean dia. dm125mm

Original catalogue drawing - NSK catalogue, page 17

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	90	3.5433
D	Outside diameter	160	6.2992
B	Inner-ring / bearing width	30	1.1811
r	Chamfer (min)	2.007	0.079

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)	90
Bore d (in)	3.5433
Outside dia. D (mm)	160
Outside dia. D (in)	6.2992
Width B (mm)	30
Width B (in)	1.1811

Load ratings & speeds

Basic dynamic load rating Cr (lbs)	21600
Basic static load rating Cor (lbs)	16100
Limiting speed - grease (rpm)	4,000
Limiting speed - oil (rpm)	4,800
Factor f0	14.5

Weight

Weight (kg)	2.15

Mounting dimensions (fillets / shoulders)

Chamfer r (in)	0.079
Shaft shoulder da min (in)	3.937
Shaft shoulder da max (in)	4.236
Housing shoulder Da max (in)	5.906

Bearing life (ISO 281 basic rating life)

C / P	Equivalent load P (N)	L₁₀ (10⁶ rev)	L_10h at 1,300 rpm
4	24,020	64	821
6	16,014	216	2,769
8	12,010	512	6,564
10	9,608	1,000	12,821
15	6,405	3,375	43,269

Basic rating life per ISO 281: L₁₀ = (C/P)³ with C = 96,082 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.19 (dimensions) / p.20 (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
1218-K-TVH-C3	FAG	Ball	90	160	30	57 kN	2.48
1218-TVH	FAG	Ball	90	160	30	57 kN	2.52
6218	FAG	Ball	90	160	30	102 kN	2.21
6218-2RSR	FAG	Ball	90	160	30	102 kN	2.21
6218-2Z	FAG	Ball	90	160	30	102 kN	2.26
QJ218-N2-MPA	FAG	Ball	90	160	30	176 kN	2.8
QJ218-XL-N2-TVP	FAG	Ball	90	160	30	189 kN	2.35
N218-E-TVP2	FAG	Cylindrical Roller	90	160	30	215 kN	2.37
N218-E-XL-TVP2	FAG	Cylindrical Roller	90	160	30	215 kN	2.37
NJ218-E-TVP2	FAG	Cylindrical Roller	90	160	30	215 kN	2.41

Same dimensions, same brand

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
1218	NSK	Ball	90	160	30	63 kN	2.56
7218B	NSK	Ball	90	160	30	22,900 lbs	2.549
BL218	NSK	Ball	90	160	30	28,300 lbs	2.404
218	NSK	Cylindrical Roller	90	160	30	34,100 lbs	2.35
NU218E	NSK	Cylindrical Roller	90	160	30	224 kN	2.6
HR30218J	NSK	Tapered Roller	90	160	30	45,200 lbs	2.599
7218	NSK	Precision / Angular Contact	90	160	30	130 kN	2.25
7218A5	NSK	Precision / Angular Contact	90	160	30	26,200 lbs	2.209

Nearby bore sizes

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
1218	NSK	Ball	90	160	30	63 kN	2.56
1318	NSK	Ball	90	190	43	129 kN	5.83
16018	NSK	Ball	90	140	16	45.5 kN	0.873
6018	NSK	Ball	90	140	24	13,100 lbs	1.161
6318	NSK	Ball	90	190	43	32,100 lbs	4.899
6818	NSK	Ball	90	115	13	4,270 lbs	0.268
6918	NSK	Ball	90	125	18	7,370 lbs	0.567
7218B	NSK	Ball	90	160	30	22,900 lbs	2.549

Request a quotation for 6218

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