32311-AFAGTapered Roller

Name: FAG 32311-A Tapered Roller Bearing
Brand: FAG
SKU: 32311-A

32311-A is a FAG tapered roller bearing, bore 55 mm, O.D. 120 mm, width 43 mm, dynamic rating 211 kN. Dimensions, drawing, interchanges and price.

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Bore d55mm

Outside dia. D120mm

Width B43mm

Dynamic Cr211kN

Static C0r270kN

Limiting speed6,000rpm

Weight2.4kg

Cr / C0r0.78

Mean dia. dm87.5mm

Original catalogue drawing - FAG Schaeffler HR 1, page 480

32311-A 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	55	2.1654
D	Outside diameter	120	4.7244
B	Inner-ring / bearing width	43	1.6929
T	Overall assembly width	45.5	1.7913
C	Cup / outer-ring width	35	1.378

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)	55
Outside dia. D (mm)	120
Width B (mm)	43
Overall width T (mm)	45.5
Cup width C (mm)	35
Inner-ring OD d1 (mm)	85

Load ratings & speeds

Basic dynamic load rating Cr (lbs)	47435
Basic static load rating Cor (lbs)	60698
Basic dynamic load rating Cr (N)	211000
Basic static load rating C0r (N)	270000
Basic dynamic axial rating Ca (N)	5
Fatigue limit load Cur (N)	33500
Factor e	0.35
Factor Y	1.74
Factor Y0	0.96
Limiting speed nG (rpm)	6,000
Reference speed nB (rpm)	4,300
Effective load centre a (mm)	30

Weight

Weight (kg)	2.4

Mounting dimensions (fillets / shoulders)

Chamfer r2 min (mm)	2.5
Shaft shoulder da (mm)	68
Shaft shoulder db (mm)	65
Housing shoulder Da (mm)	110
Housing shoulder Db (mm)	111
Housing fillet ra max (mm)	2.5
Fillet rb max (mm)	2

Bearing life (ISO 281 basic rating life)

C / P	Equivalent load P (N)	L₁₀ (10⁶ rev)	L_10h at 2,000 rpm
4	52,750	102	847
6	35,167	392	3,271
8	26,375	1,024	8,533
10	21,100	2,154	17,954
15	14,067	8,323	69,362

Basic rating life per ISO 281: L₁₀ = (C/P)^10/3 with C = 211,000 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.480 (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
2311	NSK	Ball	55	120	43	16,900 lbs	2.291
2311	NSK	Cylindrical Roller	55	120	43	33,200 lbs	2.136
NU2311E	NSK	Cylindrical Roller	55	120	43	247 kN	2.18
22311CAME4	NSK	Spherical Roller	55	120	43	47,000 lbs	2.236
22311EAE4	NSK	Spherical Roller	55	120	43	52,500 lbs	2.295
22311HE4	NSK	Spherical Roller	55	120	43	51,000 lbs	2.136
HR32311	NSK	Tapered Roller	55	120	43	251 kN	2.39
HR32311J	NSK	Tapered Roller	55	120	43	45,900 lbs	2.39
32311	Timken	Tapered Roller	55	120	43	228 kN	2.32
32311B	Timken	Tapered Roller	55	120	43	223 kN	2.45

Same dimensions, same brand

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
2311-2RS-TVH	FAG	Ball	55	120	43	52 kN	2.28
2311-K-TVH-C3	FAG	Ball	55	120	43	77 kN	2.02
2311-TVH	FAG	Ball	55	120	43	77 kN	2.07
4311-B-TVH	FAG	Ball	55	120	43	111 kN	2.06
NJ2311-E-TVP2	FAG	Cylindrical Roller	55	120	43	235 kN	2.27
NJ2311-E-XL-TVP2	FAG	Cylindrical Roller	55	120	43	235 kN	2.27
NU2311-E-TVP2	FAG	Cylindrical Roller	55	120	43	235 kN	2.23
NU2311-E-XL-TVP2	FAG	Cylindrical Roller	55	120	43	235 kN	2.23

Series variants (different suffix)

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
32311-B	FAG	Tapered Roller	55	120	43	193 kN	2.47

Nearby bore sizes

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
30211-A	FAG	Tapered Roller	55	100	21	91 kN	0.92
30211-XL	FAG	Tapered Roller	55	100	21	109 kN	0.728
30311-A	FAG	Tapered Roller	55	120	29	151 kN	1.8
30311-XL	FAG	Tapered Roller	55	120	29	180 kN	1.63
31311-A	FAG	Tapered Roller	55	120	29	122 kN	1.57
31311-A-N11CA-A80-120	FAG	Tapered Roller	55	120	None	209 kN	3.4
31311-XL	FAG	Tapered Roller	55	120	29	145 kN	1.75
32011-X	FAG	Tapered Roller	55	90	23	79 kN	0.64

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