Product specifications

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

Core specifications14 parameters

Core specifications
Parameter	Symbol	Value
Series		QJ304
Bore diameter	d	20 mm
Outside diameter	D	52 mm
Width	B	15 mm
Basic dynamic load rating	C	31 kN
Basic static load rating	C0	19.6 kN
Fatigue load limit	Pu	1.36 kN
Reference speed	nref	10700 r/min
Limiting speed	nG	19000 r/min
Mass	≈m	0.16 kg
Precision class		PN — Normal (ISO 492:2023)
Cage		TVP — Solid cage made of glass-fiber reinforced polyamid PA66
Minimum operating temperature	Tmin	-30 °C
Maximum operating temperature	Tmax	120 °C

Product characteristics4 parameters

Product characteristics
Parameter	Symbol	Value
Tolerance class	PN	Normal (ISO 492:2023)
Cage	TVP	Solid cage made of glass-fiber reinforced polyamid PA66
Dimensional / heat stabilization	S0	Rings dimensional stabilized up to 150°
Axial internal clearance	CN	Group N (CN)

Main Dimensions & Performance Data9 parameters

Main Dimensions & Performance Data
Parameter	Symbol	Value
Bore diameter	d	20 mm0.787 in
Outside diameter	D	52 mm2.047 in
Width	B	15 mm0.591 in
Basic dynamic load rating, radial	Cr	31,000 N6,969.424 lbf
Basic static load rating, radial	C0r	19,600 N4,406.475 lbf
Fatigue load limit, radial	Cur	1,360 N305.755 lbf
Limiting speed	nG	19,000 1/min
Reference speed	nϑr	10,700 1/min
Mass	≈m	0.16 kg0.353 lbs

Mounting dimensions3 parameters

Mounting dimensions
Parameter	Symbol	Value
Minimum diameter shaft shoulder	da min	27 mm1.063 in
Maximum diameter of housing shoulder	Da max	45 mm1.772 in
Maximum fillet radius	ra max	1 mm0.039 in

Dimensions5 parameters

Dimensions
Parameter	Symbol	Value
Minimum chamfer dimension	rmin	1.1 mm0.043 in
Shoulder diameter outer ring	D1	41.38 mm1.629 in
Shoulder diameter inner ring	d1	30.62 mm1.206 in
Distance between the apexes of the pressure cones	a	25.2 mm0.992 in
Contact angle	α	35 °

Temperature range2 parameters

Temperature range
Parameter	Symbol	Value
Operating temperature min.	Tmin	-30 °C-22 °F
Operating temperature max.	Tmax	120 °C248 °F

Capabilities & suitability6 parameters

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

Manufacturer Identity9 parameters

Product Identity2 parameters

Product Identity
Parameter	Symbol	Value
Construction		Four point contact bearing QJ3..-XL-TVP, X-life, plastic cage
Short Description		Four-point contact bearing

Technical Data18 parameters

Technical Data
Parameter	Symbol	Value
Bore Diameter (D)		20 mm
Outside Diameter (D)		52 mm
Width (B)		15 mm
Basic Dynamic Load Rating, Radial (Cr)		31,000 N
Basic Static Load Rating, Radial (C0R)		19,600 N
Operating Temperature Min. (Tmin)		-30 °C
Limiting Speed (Ng)		19,000 1/min
Operating Temperature Max. (Tmax)		120 °C
Reference Speed (Nϑr)		10,700 1/min
Fatigue Load Limit, Radial (Cur)		1,360 N
Minimum Diameter Shaft Shoulder (Da Min)		27 mm
Shoulder Diameter Inner Ring (D1)		30.62 mm
Maximum Diameter Of Housing Shoulder (Da Max)		45 mm
Minimum Chamfer Dimension (Rmin)		1.1 mm
Maximum Fillet Radius (Ra Max)		1 mm
Shoulder Diameter Outer Ring (D1)		41.38 mm
Contact Angle (Α)		35 °
Distance Between The Apexes Of The Pressure Cones (A)		25.2 mm

FAG QJ304-XL-TVP