Product specifications

Metric and imperial values are paired where the manufacturer provides both. Expand a section to review its parameters.

Core specifications13 parameters

Core specifications
Parameter	Symbol	Value
Bore diameter	d	260 mm
Outside diameter	D	340 mm
Width	B	42 mm
Basic dynamic load rating	C	430 kN
Basic static load rating	C0	810 kN
Fatigue load limit	Pu	76 kN
Reference speed	nref	1100 r/min
Limiting speed	nG	1930 r/min
Mass	≈m	9.3 kg
Precision class		PN — Normal (ISO 492:2023)
Cage		Standard — Sheet steel cage, window cage, roller-guided
Minimum operating temperature	Tmin	-30 °C
Maximum operating temperature	Tmax	200 °C

Product characteristics5 parameters

Product characteristics
Parameter	Symbol	Value
Tolerance class	PN	Normal (ISO 492:2023)
Heat treatment		Standard
Cage	Standard	Sheet steel cage, window cage, roller-guided
Quality level		Standard
Number of rows	1	Single-row design

Main Dimensions & Performance Data11 parameters

Main Dimensions & Performance Data
Parameter	Symbol	Value
Bore diameter	d	260 mm10.236 in
Outside diameter	D	340 mm13.386 in
Width, inner ring	B	39 mm1.535 in
Width, outer ring	C	30 mm1.181 in
Width, total	T	42 mm1.654 in
Basic dynamic load rating, radial	Cr	430,000 N96,672.662 lbf
Basic static load rating, radial	C0r	810,000 N182,104.317 lbf
Fatigue load limit, radial	Cur	76,000 N17,086.331 lbf
Limiting speed	nG	1,930 1/min
Thermal speed rating	nϑr	1,100 1/min
Mass	≈m	9.3 kg20.503 lbs

Mounting dimensions9 parameters

Mounting dimensions
Parameter	Symbol	Value
Maximum diameter of shaft shoulder	da max	274 mm10.787 in
Minimum diameter of shaft shoulder	db min	279 mm10.984 in
Minimum diameter of housing shoulder	Da min	318 mm12.52 in
Maximum diameter of housing shoulder	Da max	326 mm12.835 in
Minimum diameter of housing shoulder	Db min	330 mm12.992 in
Minimum axial space	Ca min	8 mm0.315 in
Minimum axial space	Cb min	12 mm0.472 in
Maximum fillet radius of shaft	ra max	3 mm0.118 in
Maximum fillet radius of housing	rb max	3 mm0.118 in

Dimensions4 parameters

Dimensions
Parameter	Symbol	Value
Minimum chamfer dimension of inner ring back face	r1, 2 min	3 mm0.118 in
Minimum chamfer dimension of outer ring back face	r3, 4 min	3 mm0.118 in
Distance between the apexes of the pressure cones	a	68 mm2.677 in
Guidance rib diameter of inner ring	d1	297 mm11.693 in

Temperature range2 parameters

Temperature range
Parameter	Symbol	Value
Operating temperature min.	Tmin	-30 °C-22 °F
Operating temperature max.	Tmax	200 °C392 °F

Calculation factors3 parameters

Calculation factors
Parameter	Symbol	Value
Limiting value of Fa/Fr for the applicability of diff. Values of factors X and Y	e	0.49
Dynamic axial load factor	Y	1.23
Static axial load factor	Y0	0.67

Capabilities & suitability6 parameters

Capabilities & suitability
Parameter	Symbol	Value
Radial load capacity		Yes
Axial load capacity in one direction		Yes
Suitable for grease lubrication		Yes
Suitable for oil lubrication		Yes
Unsealed design		Yes
Largebearing		Yes

Manufacturer Identity8 parameters

Product Identity2 parameters

Product Identity
Parameter	Symbol	Value
Construction		Tapered roller bearings T, main dimensions acc. to ISO 355, separable
Short Description		Tapered roller bearing

Additional information1 parameter

Additional information
Parameter	Symbol	Value
Comparative designation to ISO 10317 and ISO 355		T4DB260

Technical Data28 parameters

Technical Data
Parameter	Symbol	Value
Bore Diameter (D)		260 mm
Outside Diameter (D)		340 mm
Width (B)		42 mm
Basic Dynamic Load Rating, Radial (Cr)		430,000 N
Basic Static Load Rating, Radial (C0R)		810,000 N
Operating Temperature Min. (Tmin)		-30 °C
Limiting Speed (Ng)		1,930 1/min
Operating Temperature Max. (Tmax)		200 °C
Reference Speed (Nϑr)		1,100 1/min
Maximum Fillet Radius Of Housing (Rb Max)		3 mm
Minimum Chamfer Dimension Of Outer Ring Back Face (R3, 4 M)		3 mm
Minimum Diameter Of Housing Shoulder (Da Min)		318 mm
Minimum Diameter Of Housing Shoulder (Db Min)		330 mm
Width, Outer Ring (C)		30 mm
Fatigue Load Limit, Radial (Cur)		76,000 N
Limiting Value Of Fa/Fr For The Applicability Of Diff. Values Of Factors X And Y (E)		0.49
Maximum Diameter Of Shaft Shoulder (Da Max)		274 mm
Minimum Diameter Of Shaft Shoulder (Db Min)		279 mm
Maximum Diameter Of Housing Shoulder (Da Max)		326 mm
Dynamic Axial Load Factor (Y)		1.23
Maximum Fillet Radius (Ra Max)		3 mm
Minimum Axial Space (Cb Min)		12 mm
Minimum Chamfer Dimension Of Inner Ring Back Face (R1, 2 M)		3 mm
Guidance Rib Diameter Of Inner Ring (D1)		297 mm
Minimum Axial Space (Ca Min)		8 mm
Width, Inner Ring (B)		39 mm
Static Axial Load Factor (Y0)		0.67
Distance Between The Apexes Of The Pressure Cones (A)		68 mm

FAG T4DB260