320/42-XFAGTapered Roller

Name: FAG 320/42-X Tapered Roller Bearing
Brand: FAG
SKU: 320/42-X

320/42-X is a FAG tapered roller bearing, bore 42 mm, O.D. 72 mm, width 20 mm, dynamic rating 59 kN. Dimensions, drawing, interchanges and price.

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Bore d42mm

Outside dia. D72mm

Width B20mm

Dynamic Cr59kN

Static C0r82kN

Limiting speed9,900rpm

Weight0.345kg

Cr / C0r0.72

Mean dia. dm57mm

Original catalogue drawing - FAG Schaeffler HR 1, page 590

320/42-X 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	42	1.6535
D	Outside diameter	72	2.8346
B	Inner-ring / bearing width	20	0.7874
T	Overall assembly width	20	0.7874
C	Cup / outer-ring width	15.5	0.6102

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)	42
Outside dia. D (mm)	72
Width B (mm)	20
Overall width T (mm)	20
Cup width C (mm)	15.5
Inner-ring OD d1 (mm)	58.3

Load ratings & speeds

Basic dynamic load rating Cr (lbs)	13264
Basic static load rating Cor (lbs)	18434
Basic dynamic load rating Cr (N)	59000
Basic static load rating C0r (N)	82000
Basic dynamic axial rating Ca (N)	4
Fatigue limit load Cur (N)	9800
Factor e	0.37
Factor Y	1.6
Factor Y0	0.88
Limiting speed nG (rpm)	9,900
Reference speed nB (rpm)	5,700
Effective load centre a (mm)	16

Weight

Weight (kg)	0.345

Mounting dimensions (fillets / shoulders)

Chamfer r2 min (mm)	1
Shaft shoulder da (mm)	48
Shaft shoulder db (mm)	48
Housing shoulder Da (mm)	64
Housing shoulder Db (mm)	69
Housing fillet ra max (mm)	1
Fillet rb max (mm)	1

Bearing life (ISO 281 basic rating life)

C / P	Equivalent load P (N)	L₁₀ (10⁶ rev)	L_10h at 3,000 rpm
4	14,750	102	564
6	9,833	392	2,181
8	7,375	1,024	5,689
10	5,900	2,154	11,969
15	3,933	8,323	46,241

Basic rating life per ISO 281: L₁₀ = (C/P)^10/3 with C = 59,000 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.590 (dimensions)

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

Series variants (different suffix)

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
320/22-X	FAG	Tapered Roller	22	44	15	24.8 kN	0.11
320/28-X	FAG	Tapered Roller	28	52	16	33.5 kN	0.156
320/32-X	FAG	Tapered Roller	32	58	17	38.5 kN	0.188
320/38-X	FAG	Tapered Roller	38	65	18	49 kN	0.252

Nearby bore sizes

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
K4395-4335	FAG	Tapered Roller	42.07	90.49	40.39	142 kN	1.29
K336-332-A	FAG	Tapered Roller	41.27	80	22.4	68 kN	0.498
K3585-3525	FAG	Tapered Roller	41.27	87.31	30.89	97 kN	0.857
K365-A-362	FAG	Tapered Roller	41.27	90	22.23	72 kN	0.648
K419-414	FAG	Tapered Roller	41.27	88.5	29.08	89 kN	0.79
K46162-46368	FAG	Tapered Roller	41.27	93.66	31.75	110 kN	1.12
KHM803146-HM803110	FAG	Tapered Roller	41.27	88.9	29.37	93 kN	0.9
KHM804840-HM804810	FAG	Tapered Roller	41.27	95.25	29.37	111 kN	1.19

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