6307NSKBall

Name: NSK 6307 Ball Bearing
Brand: NSK
SKU: 6307

6307 is a NSK ball bearing, bore 35 mm, O.D. 80 mm, width 21 mm, dynamic rating 7,490 lbs. Dimensions, drawing, interchanges and price.

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Bore d35mm

Outside dia. D80mm

Width B21mm

Dynamic Cr7,490lbs

Static C0r4,320lbs

Limiting speed8,500rpm

Weight0.458kg

Cr / C0r1.73

Mean dia. dm57.5mm

Original catalogue drawing - NSK catalogue, page 19

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	35	1.378
D	Outside diameter	80	3.1496
B	Inner-ring / bearing width	21	0.8268
r	Chamfer (min)	1.499	0.059

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)	35
Bore d (in)	1.3780
Outside dia. D (mm)	80
Outside dia. D (in)	3.1496
Width B (mm)	21
Width B (in)	0.8268

Load ratings & speeds

Basic dynamic load rating Cr (lbs)	7490
Basic static load rating Cor (lbs)	4320
Limiting speed - grease (rpm)	8,500
Limiting speed - oil (rpm)	10,000
Factor f0	13.2

Weight

Weight (kg)	0.458

Mounting dimensions (fillets / shoulders)

Chamfer r (in)	0.059
Shaft shoulder da min (in)	1.688
Shaft shoulder da max (in)	1.852
Housing shoulder Da max (in)	2.795

Bearing life (ISO 281 basic rating life)

C / P	Equivalent load P (N)	L₁₀ (10⁶ rev)	L_10h at 2,800 rpm
4	8,329	64	381
6	5,553	216	1,286
8	4,165	512	3,048
10	3,332	1,000	5,952
15	2,221	3,375	20,089

Basic rating life per ISO 281: L₁₀ = (C/P)³ with C = 33,317 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.21 (dimensions) / p.22 (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
1307-K-TVH-C3	FAG	Ball	35	80	21	25.5 kN	0.5
1307-TVH	FAG	Ball	35	80	21	25.5 kN	0.507
6307	FAG	Ball	35	80	21	33.5 kN	0.471
6307-2RSR	FAG	Ball	35	80	21	33.5 kN	0.483
6307-2Z	FAG	Ball	35	80	21	33.5 kN	0.481
6307-C	FAG	Ball	35	80	21	37 kN	0.434
6307-C-2BRS	FAG	Ball	35	80	21	37 kN	0.447
6307-C-2HRS	FAG	Ball	35	80	21	37 kN	0.449
6307-C-2Z	FAG	Ball	35	80	21	37 kN	0.447
QJ307-TVP	FAG	Ball	35	80	21	62 kN	0.516

Same dimensions, same brand

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
1307	NSK	Ball	35	80	21	5,620 lbs	0.535
7307B	NSK	Ball	35	80	21	7,830 lbs	0.476
BL307	NSK	Ball	35	80	21	9,850 lbs	0.485
307	NSK	Cylindrical Roller	35	80	21	11,100 lbs	0.449
NU307E	NSK	Cylindrical Roller	35	80	21	82 kN	0.545
HR30307	NSK	Tapered Roller	35	80	21	93.5 kN	0.538
HR30307C	NSK	Tapered Roller	35	80	21	15,300 lbs	0.508
HR30307J	NSK	Tapered Roller	35	80	21	17,100 lbs	0.54

Nearby bore sizes

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
1207	NSK	Ball	35	72	17	3,600 lbs	0.331
1307	NSK	Ball	35	80	21	5,620 lbs	0.535
16007	NSK	Ball	35	62	9	12.8 kN	0.107
2207	NSK	Ball	35	72	23	7,190 lbs	0.399
2307	NSK	Ball	35	80	31	8,770 lbs	0.744
3207J	NSK	Ball	35	72	27	8,410 lbs	0.481
3307J	NSK	Ball	35	80	34.9	10,600 lbs	0.816
5207J	NSK	Ball	35	72	27	8,770 lbs	0.431

Request a quotation for 6307

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