6934NSKBall

Name: NSK 6934 Ball Bearing
Brand: NSK
SKU: 6934

6934 is a NSK ball bearing, bore 170 mm, O.D. 230 mm, width 28 mm, dynamic rating 19,300 lbs. Dimensions, drawing, interchanges and price.

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Bore d170mm

Outside dia. D230mm

Width B28mm

Dynamic Cr19,300lbs

Static C0r21,700lbs

Limiting speed2,400rpm

Weight3.302kg

Cr / C0r0.89

Mean dia. dm200mm

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	170	6.6929
D	Outside diameter	230	9.0551
B	Inner-ring / bearing width	28	1.1024
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)	170
Bore d (in)	6.6929
Outside dia. D (mm)	230
Outside dia. D (in)	9.0551
Width B (mm)	28
Width B (in)	1.1024

Load ratings & speeds

Basic dynamic load rating Cr (lbs)	19300
Basic static load rating Cor (lbs)	21700
Limiting speed - grease (rpm)	2,400
Limiting speed - oil (rpm)	2,800
Factor f0	16.7

Weight

Weight (kg)	3.302

Mounting dimensions (fillets / shoulders)

Chamfer r (in)	0.079
Shaft shoulder da min (in)	7.047
Shaft shoulder da max (in)	7.323
Housing shoulder Da max (in)	8.701

Bearing life (ISO 281 basic rating life)

C / P	Equivalent load P (N)	L₁₀ (10⁶ rev)	L_10h at 800 rpm
4	21,463	64	1,333
6	14,308	216	4,500
8	10,731	512	10,667
10	8,585	1,000	20,833
15	5,723	3,375	70,312

Basic rating life per ISO 281: L₁₀ = (C/P)³ with C = 85,851 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
61934	FAG	Ball	170	230	28	109 kN	2.83
B71934-C-T-P4S	FAG	Precision / Angular Contact	170	230	28	129 kN	2.78
B71934-E-T-P4S	FAG	Precision / Angular Contact	170	230	28	122 kN	2.77

Same dimensions, same brand

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
7934A5	NSK	Precision / Angular Contact	170	230	28	23,800 lbs	3.361
7934C	NSK	Precision / Angular Contact	170	230	28	25,400 lbs	3.329

Nearby bore sizes

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
16034	NSK	Ball	170	260	28	126 kN	5.71
6034	NSK	Ball	170	260	42	36,200 lbs	7.938
6234	NSK	Ball	170	310	52	47,700 lbs	15.567
6334	NSK	Ball	170	360	72	73,400 lbs	38.102
6834	NSK	Ball	170	215	22	13,400 lbs	1.864
7234B	NSK	Ball	170	310	52	60,000 lbs	17.01
7334B	NSK	Ball	170	360	72	79,400 lbs	35.471

Request a quotation for 6934

Send us the quantity you need and we will come back with price and lead time, normally within 24 hours. Equivalent parts from other brands can be quoted at the same time.

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