7311-B-JPFAGPrecision / Angular Contact

Name: FAG 7311-B-JP Precision / Angular Contact Bearing
Brand: FAG
SKU: 7311-B-JP

7311-B-JP is a FAG precision / angular contact bearing, bore 55 mm, O.D. 120 mm, width 29 mm. Dimensions, drawing, interchanges and price.

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Bore d55mm

Outside dia. D120mm

Width B29mm

Dynamic Cr80kN

Static C0r61kN

Limiting speed6,300rpm

Weight1.46kg

Cr / C0r1.31

Mean dia. dm87.5mm

Original catalogue drawing - FAG Schaeffler HR 1, page 244

7311-B-JP FAG Precision / Angular Contact 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	29	1.1417
r	Chamfer (min)	2	0.0787

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)	29
Inner-ring OD d1 (mm)	80.3
Inner-ring shoulder dia. D1 (mm)	95.3

Load ratings & speeds

Basic dynamic load rating Cr (lbs)	17985
Basic static load rating Cor (lbs)	13713
Basic dynamic load rating Cr (N)	80000
Basic static load rating C0r (N)	61000
Fatigue limit load Cur (N)	4100
Limiting speed nG (rpm)	6,300
Reference speed nB (rpm)	5,700
Effective load centre a (mm)	51

Weight

Weight (kg)	1.46

Mounting dimensions (fillets / shoulders)

Housing fillet r max (mm)	2
Chamfer r1 min (mm)	1
Shaft shoulder da (mm)	66
Housing shoulder Da (mm)	109
Housing shoulder Db (mm)	114.4
Housing fillet ra max (mm)	2
Housing fillet ra1 max (mm)	1

Bearing life (ISO 281 basic rating life)

C / P	Equivalent load P (N)	L₁₀ (10⁶ rev)	L_10h at 2,100 rpm
4	20,000	64	508
6	13,333	216	1,714
8	10,000	512	4,063
10	8,000	1,000	7,937
15	5,333	3,375	26,786

Basic rating life per ISO 281: L₁₀ = (C/P)³ with C = 80,000 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.244 (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
1311	NSK	Ball	55	120	29	11,500 lbs	1.642
6311	NSK	Ball	55	120	29	16,100 lbs	1.352
7311B	NSK	Ball	55	120	29	16,800 lbs	1.52
BL311	NSK	Ball	55	120	29	19,900 lbs	1.465
311	NSK	Cylindrical Roller	55	120	29	24,900 lbs	1.451
NU311E	NSK	Cylindrical Roller	55	120	29	169 kN	1.64
21311EAE4	NSK	Spherical Roller	55	120	29	178 kN	1.58
HR30311	NSK	Tapered Roller	55	120	29	184 kN	1.63
HR30311J	NSK	Tapered Roller	55	120	29	33,700 lbs	1.628
HR31311	NSK	Tapered Roller	55	120	29	161 kN	1.58

Same dimensions, same brand

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
1311-K-TVH-C3	FAG	Ball	55	120	29	52 kN	1.55
1311-TVH	FAG	Ball	55	120	29	52 kN	1.57
6311	FAG	Ball	55	120	29	76.5 kN	1.39
6311-2RSR	FAG	Ball	55	120	29	76.5 kN	1.43
6311-2Z	FAG	Ball	55	120	29	76.5 kN	1.43
6311-C	FAG	Ball	55	120	29	83 kN	1.33
6311-C-2BRS	FAG	Ball	55	120	29	83 kN	1.38
6311-C-2HRS	FAG	Ball	55	120	29	83 kN	1.37

Series variants (different suffix)

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
7311-B-TVP	FAG	Precision / Angular Contact	55	120	29	80 kN	1.38
7311-B-XL-JP	FAG	Precision / Angular Contact	55	120	29	86 kN	1.46
7311-B-XL-TVP	FAG	Precision / Angular Contact	55	120	29	86 kN	1.38

Nearby bore sizes

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
3211-B-2RSR-TVH	FAG	Precision / Angular Contact	55	100	33.3	58.5 kN	0.969
3211-B-TVH	FAG	Precision / Angular Contact	55	100	33.3	58.5 kN	0.954
3211-BD-XL-2HRS-TVH	FAG	Precision / Angular Contact	55	100	33.3	61 kN	0.933
3211-BD-XL-2Z-TVH	FAG	Precision / Angular Contact	55	100	33.3	61 kN	0.93
3211-BD-XL-TVH	FAG	Precision / Angular Contact	55	100	33.3	61 kN	0.94
3311-B-2RSR-TVH	FAG	Precision / Angular Contact	55	120	49.2	102 kN	2.35
3311-B-2Z-TVH	FAG	Precision / Angular Contact	55	120	49.2	102 kN	2.36
3311-B-TVH	FAG	Precision / Angular Contact	55	120	49.2	102 kN	2.32

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