6305NSKBall

Name: NSK 6305 Ball Bearing
Brand: NSK
SKU: 6305

6305 is a NSK ball bearing, bore 25 mm, O.D. 62 mm, width 17 mm, dynamic rating 4,630 lbs. Dimensions, drawing, interchanges and price.

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Bore d25mm

Outside dia. D62mm

Width B17mm

Dynamic Cr4,630lbs

Static C0r2,530lbs

Limiting speed11,000rpm

Weight0.236kg

Cr / C0r1.83

Mean dia. dm43.5mm

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	25	0.9843
D	Outside diameter	62	2.4409
B	Inner-ring / bearing width	17	0.6693
r	Chamfer (min)	0.991	0.039

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)	25
Bore d (in)	0.9843
Outside dia. D (mm)	62
Outside dia. D (in)	2.4409
Width B (mm)	17
Width B (in)	0.6693

Load ratings & speeds

Basic dynamic load rating Cr (lbs)	4630
Basic static load rating Cor (lbs)	2530
Limiting speed - grease (rpm)	11,000
Limiting speed - oil (rpm)	13,000
Factor f0	13.2

Weight

Weight (kg)	0.236

Mounting dimensions (fillets / shoulders)

Chamfer r (in)	0.039
Shaft shoulder da min (in)	1.220
Shaft shoulder da max (in)	1.418
Housing shoulder Da max (in)	2.165

Bearing life (ISO 281 basic rating life)

C / P	Equivalent load P (N)	L₁₀ (10⁶ rev)	L_10h at 3,000 rpm
4	5,149	64	356
6	3,433	216	1,200
8	2,574	512	2,844
10	2,060	1,000	5,556
15	1,373	3,375	18,750

Basic rating life per ISO 281: L₁₀ = (C/P)³ with C = 20,595 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
1305-K-TVH-C3	FAG	Ball	25	62	17	18.3 kN	0.254
1305-TVH	FAG	Ball	25	62	17	18.3 kN	0.258
6305	FAG	Ball	25	62	17	22.4 kN	0.234
6305-2RSR	FAG	Ball	25	62	17	22.4 kN	0.242
6305-2Z	FAG	Ball	25	62	17	22.4 kN	0.24
6305-C	FAG	Ball	25	62	17	24.7 kN	0.215
6305-C-2BRS	FAG	Ball	25	62	17	24.7 kN	0.242
6305-C-2HRS	FAG	Ball	25	62	17	24.7 kN	0.224
6305-C-2Z	FAG	Ball	25	62	17	24.7 kN	0.222
QJ305-TVP	FAG	Ball	25	62	17	44 kN	0.256

Same dimensions, same brand

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
1305	NSK	Ball	25	62	17	4,050 lbs	0.277
7305B	NSK	Ball	25	62	17	5,160 lbs	0.245
BL305	NSK	Ball	25	62	17	5,720 lbs	0.245
305	NSK	Cylindrical Roller	25	62	17	6,560 lbs	0.24
NU305E	NSK	Cylindrical Roller	25	62	17	51 kN	0.269
21305CDE4	NSK	Spherical Roller	25	62	17	43 kN	0.26
HR30305	NSK	Tapered Roller	25	62	17	58.5 kN	0.27
HR30305C	NSK	Tapered Roller	25	62	17	9,440 lbs	0.265

Nearby bore sizes

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
1205	NSK	Ball	25	52	15	2,740 lbs	0.136
1305	NSK	Ball	25	62	17	4,050 lbs	0.277
16005	NSK	Ball	25	47	8	9.8 kN	0.059
2205	NSK	Ball	25	52	18	3,820 lbs	0.159
2305	NSK	Ball	25	62	24	5,510 lbs	0.372
3205J	NSK	Ball	25	52	20.6	4,360 lbs	0.195
3305J	NSK	Ball	25	62	25.4	6,320 lbs	0.367
5205J	NSK	Ball	25	52	20.6	4,790 lbs	0.191

Request a quotation for 6305

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