6910NSKBall

Name: NSK 6910 Ball Bearing
Brand: NSK
SKU: 6910

6910 is a NSK ball bearing, bore 50 mm, O.D. 72 mm, width 12 mm, dynamic rating 3,260 lbs. Dimensions, drawing, interchanges and price.

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Bore d50mm

Outside dia. D72mm

Width B12mm

Dynamic Cr3,260lbs

Static C0r2,640lbs

Limiting speed9,000rpm

Weight0.132kg

Cr / C0r1.23

Mean dia. dm61mm

Original catalogue drawing - NSK catalogue, page 23

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	50	1.9685
D	Outside diameter	72	2.8346
B	Inner-ring / bearing width	12	0.4724
r	Chamfer (min)	0.61	0.024

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)	50
Bore d (in)	1.9685
Outside dia. D (mm)	72
Outside dia. D (in)	2.8346
Width B (mm)	12
Width B (in)	0.4724

Load ratings & speeds

Basic dynamic load rating Cr (lbs)	3260
Basic static load rating Cor (lbs)	2640
Limiting speed - grease (rpm)	9,000
Limiting speed - oil (rpm)	11,000
Factor f0	16.1

Weight

Weight (kg)	0.132

Mounting dimensions (fillets / shoulders)

Chamfer r (in)	0.024
Shaft shoulder da min (in)	2.126
Shaft shoulder da max (in)	2.165
Housing shoulder Da max (in)	2.677

Bearing life (ISO 281 basic rating life)

C / P	Equivalent load P (N)	L₁₀ (10⁶ rev)	L_10h at 3,000 rpm
4	3,625	64	356
6	2,417	216	1,200
8	1,813	512	2,844
10	1,450	1,000	5,556
15	967	3,375	18,750

Basic rating life per ISO 281: L₁₀ = (C/P)³ with C = 14,501 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.25 (dimensions) / p.26 (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
61910	FAG	Ball	50	72	12	15.4 kN	0.083
61910-2RSR	FAG	Ball	50	72	12	15.4 kN	0.13
61910-2RZ	FAG	Ball	50	72	12	15.4 kN	0.13
B71910-C-T-P4S	FAG	Precision / Angular Contact	50	72	12	19 kN	0.132
B71910-E-T-P4S	FAG	Precision / Angular Contact	50	72	12	18 kN	0.132
HCB71910-C-T-P4S	FAG	Precision / Angular Contact	50	72	12	13.2 kN	0.13
HCB71910-E-T-P4S	FAG	Precision / Angular Contact	50	72	12	12.2 kN	0.13
HCS71910-C-T-P4S	FAG	Precision / Angular Contact	50	72	12	7.1 kN	0.136
HCS71910-E-T-P4S	FAG	Precision / Angular Contact	50	72	12	6.7 kN	0.136
HSS71910-C-T-P4S	FAG	Precision / Angular Contact	50	72	12	10.4 kN	0.133

Same dimensions, same brand

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
7910A5	NSK	Precision / Angular Contact	50	72	12	3,590 lbs	0.132
7910C	NSK	Precision / Angular Contact	50	72	12	3,790 lbs	0.127

Nearby bore sizes

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
1210	NSK	Ball	50	90	20	5,130 lbs	0.531
1310	NSK	Ball	50	110	27	9,330 lbs	1.288
16010	NSK	Ball	50	80	10	17 kN	0.175
2210	NSK	Ball	50	90	23	6,290 lbs	0.572
2310	NSK	Ball	50	110	40	14,400 lbs	1.778
3210J	NSK	Ball	50	90	30.2	11,100 lbs	0.762
3310J	NSK	Ball	50	110	44.4	19,100 lbs	1.946
5210J	NSK	Ball	50	90	30.2	11,900 lbs	0.671

Request a quotation for 6910

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