31317FAGTapered Roller

Name: FAG 31317 Tapered Roller Bearing
Brand: FAG
SKU: 31317

31317 is a FAG tapered roller bearing, bore 85 mm, O.D. 180 mm, width 41 mm, dynamic rating 255 kN. Dimensions, drawing, interchanges and price.

Request a quote WhatsApp Email us Search the catalog

Bore d85mm

Outside dia. D180mm

Width B41mm

Dynamic Cr255kN

Static C0r305kN

Limiting speed4,300rpm

Weight4.88kg

Cr / C0r0.84

Mean dia. dm132.5mm

Original catalogue drawing - FAG Schaeffler HR 1, page 484

31317 FAG Tapered Roller bearing catalogue drawing

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	85	3.3465
D	Outside diameter	180	7.0866
B	Inner-ring / bearing width	41	1.6142
T	Overall assembly width	44.5	1.752
C	Cup / outer-ring width	28	1.1024

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)	85
Outside dia. D (mm)	180
Width B (mm)	41
Overall width T (mm)	44.5
Cup width C (mm)	28
Inner-ring OD d1 (mm)	129.3

Load ratings & speeds

Basic dynamic load rating Cr (lbs)	57326
Basic static load rating Cor (lbs)	68567
Basic dynamic load rating Cr (N)	255000
Basic static load rating C0r (N)	305000
Basic dynamic axial rating Ca (N)	6
Fatigue limit load Cur (N)	34000
Factor e	0.83
Factor Y	0.73
Factor Y0	0.4
Limiting speed nG (rpm)	4,300
Reference speed nB (rpm)	3,450
Effective load centre a (mm)	55

Weight

Weight (kg)	4.88

Mounting dimensions (fillets / shoulders)

Chamfer r2 min (mm)	4
Shaft shoulder da (mm)	103
Shaft shoulder db (mm)	99
Housing shoulder Da (mm)	166
Housing shoulder Db (mm)	169
Housing fillet ra max (mm)	4
Fillet rb max (mm)	3

Bearing life (ISO 281 basic rating life)

C / P	Equivalent load P (N)	L₁₀ (10⁶ rev)	L_10h at 1,400 rpm
4	63,750	102	1,209
6	42,500	392	4,673
8	31,875	1,024	12,190
10	25,500	2,154	25,648
15	17,000	8,323	99,089

Basic rating life per ISO 281: L₁₀ = (C/P)^10/3 with C = 255,000 N. Hours = L₁₀ x 10⁶ / (60n). Life-modification factors for lubrication, contamination and temperature (a_ISO) are not included.

Source & traceability

Brand	FAG
Source catalogue	FAG / Schaeffler Rolling Bearings HR 1
Catalogue page	p.484 (dimensions)

Load ratings in newtons, fatigue limit load Cur, limiting speed nG and reference speed nB.

Interchange - same dimensions, other brands

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
1317	NSK	Ball	85	180	41	108 kN	5.03
6317	NSK	Ball	85	180	41	29,800 lbs	4.25
7317B	NSK	Ball	85	180	41	30,900 lbs	5.035
BL317	NSK	Ball	85	180	41	39,100 lbs	4.699
317	NSK	Cylindrical Roller	85	180	41	47,500 lbs	4.536
NU317	NSK	Cylindrical Roller	85	180	41	261 kN	4.6
NU317E	NSK	Cylindrical Roller	85	180	41	360 kN	5.26
21317EAE4	NSK	Spherical Roller	85	180	41	360 kN	5.2
HR30317	NSK	Tapered Roller	85	180	41	380 kN	5.08
HR30317J	NSK	Tapered Roller	85	180	41	69,700 lbs	5.08

Same dimensions, same brand

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
1317-K-M-C3	FAG	Ball	85	180	41	99 kN	5.32
1317-M	FAG	Ball	85	180	41	99 kN	5.39
6317	FAG	Ball	85	180	41	141 kN	4.25
6317-2RSR	FAG	Ball	85	180	41	141 kN	4.25
6317-2Z	FAG	Ball	85	180	41	141 kN	4.33
QJ317-N2-MPA	FAG	Ball	85	180	41	245 kN	5.54
N317-E-M1	FAG	Cylindrical Roller	85	180	41	340 kN	5.3
N317-E-XL-M1	FAG	Cylindrical Roller	85	180	41	340 kN	5.3

Series variants (different suffix)

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
31317-N11CA-A120-160	FAG	Tapered Roller	85	180	None	435 kN	10.4

Nearby bore sizes

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
30217-A	FAG	Tapered Roller	85	150	28	175 kN	2.29
30217-XL	FAG	Tapered Roller	85	150	28	212 kN	2.13
30317-A	FAG	Tapered Roller	85	180	41	315 kN	4.83
32017-X	FAG	Tapered Roller	85	130	29	141 kN	1.36
32017-X-XL	FAG	Tapered Roller	85	130	29	167 kN	1.36
32017-X-XL-DF-A170-220	FAG	Tapered Roller	85	130	None	285 kN	2.8
32017-X-XL-DF-A190-230	FAG	Tapered Roller	85	130	None	285 kN	2.8
32217-A	FAG	Tapered Roller	85	150	36	226 kN	2.72

Request a quotation for 31317

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