Product specifications

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

Core specifications11 parameters

Core specifications
Parameter	Symbol	Value
Bore diameter	d	25.4 mm
Basic dynamic load rating	C	43 kN
Basic static load rating	C0	46.5 kN
Fatigue load limit	Pu	5.4 kN
Reference speed	nref	9500 r/min
Limiting speed	nG	14200 r/min
Mass	≈m	0.142 kg
Precision class		ABMA4 — Class 4 (ANSI/ABMA 19.2:2013)
Cage		Standard — Sheet steel cage, window cage, roller-guided
Minimum operating temperature	Tmin	-30 °C
Maximum operating temperature	Tmax	120 °C

Product characteristics5 parameters

Product characteristics
Parameter	Symbol	Value
Tolerance class	ABMA4	Class 4 (ANSI/ABMA 19.2:2013)
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 Data8 parameters

Main Dimensions & Performance Data
Parameter	Symbol	Value
Bore diameter	d	25.4 mm1 in
Width, inner ring	B	19.837 mm0.781 in
Basic dynamic load rating, radial	Cr	43,000 N9,667.266 lbf
Basic static load rating, radial	C0r	46,500 N10,454.137 lbf
Fatigue load limit, radial	Cur	5,400 N1,214.029 lbf
Limiting speed	nG	14,200 1/min
Thermal speed rating	nϑr	9,500 1/min
Mass	≈m	0.142 kg0.313 lbs

Mounting dimensions5 parameters

Mounting dimensions
Parameter	Symbol	Value
Maximum diameter of shaft shoulder	da max	30 mm1.181 in
Minimum diameter of shaft shoulder	db min	30.5 mm1.201 in
Minimum axial space	CRa min	1.5 mm0.059 in
Maximum axial space	CRb max	0.4 mm0.016 in
Maximum fillet radius of shaft	ra max	0.8 mm0.031 in

Dimensions5 parameters

Dimensions
Parameter	Symbol	Value
Minimum chamfer dimension of inner ring back face	r1, 2 min	0.8 mm0.031 in
Distance between the apexes of the pressure cones	a	13 mm0.512 in
Guidance rib diameter of inner ring	d1	39.9 mm1.571 in
Outer envelope circle	Ew	51.456 mm2.026 in
Contact angle	α	11.583 °

Temperature range2 parameters

Temperature range
Parameter	Symbol	Value
Operating temperature min.	Tmin	-30 °C-22 °F
Operating temperature max.	Tmax	120 °C248 °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	0.31
Dynamic axial load factor	Y	1.95
Static axial load factor	Y0	1.07

Capabilities & suitability5 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

Manufacturer Identity5 parameters

Product Identity2 parameters

Product Identity
Parameter	Symbol	Value
Construction		Tapered roller bearings without outer ring (Cone) K-Series, in inch sizes
Short Description		Tapered roller bearing

Technical Data21 parameters

Technical Data
Parameter	Symbol	Value
Bore Diameter (D)		25.4 mm
Basic Dynamic Load Rating, Radial (Cr)		43,000 N
Basic Static Load Rating, Radial (C0R)		46,500 N
Operating Temperature Min. (Tmin)		-30 °C
Limiting Speed (Ng)		14,200 1/min
Operating Temperature Max. (Tmax)		120 °C
Reference Speed (Nϑr)		9,500 1/min
Contact Angle (Α)		11.583 °
Fatigue Load Limit, Radial (Cur)		5,400 N
Limiting Value Of Fa/Fr For The Applicability Of Diff. Values Of Factors X And Y (E)		0.31
Maximum Diameter Of Shaft Shoulder (Da Max)		30 mm
Minimum Diameter Of Shaft Shoulder (Db Min)		30.5 mm
Dynamic Axial Load Factor (Y)		1.95
Maximum Fillet Radius (Ra Max)		0.8 mm
Maximum Axial Space (Crb Max)		0.4 mm
Minimum Chamfer Dimension Of Inner Ring Back Face (R1, 2 M)		0.8 mm
Guidance Rib Diameter Of Inner Ring (D1)		39.9 mm
Minimum Axial Space (Cra Min)		1.5 mm
Width, Inner Ring (B)		19.837 mm
Static Axial Load Factor (Y0)		1.07
Distance Between The Apexes Of The Pressure Cones (A)		13 mm

FAG K1780