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		QJ256
Bore diameter	d	280 mm
Outside diameter	D	500 mm
Width	B	80 mm
Basic dynamic load rating	C	870 kN
Basic static load rating	C0	1750 kN
Fatigue load limit	Pu	49 kN
Reference speed	nref	1000 r/min
Limiting speed	nG	2210 r/min
Mass	≈m	73.1 kg
Precision class		PN — Normal (ISO 492:2023)
Cage		MPA — Solid brass cage, outer ring guided
Minimum operating temperature	Tmin	-30 °C
Maximum operating temperature	Tmax	200 °C

Product characteristics5 parameters

Product characteristics
Parameter	Symbol	Value
Design, bearing outer ring	N2	Two retaining grooves in the outer ring on one side
Tolerance class	PN	Normal (ISO 492:2023)
Cage	MPA	Solid brass cage, outer ring guided
Dimensional / heat stabilization	S1	Rings dimensional stabilized up to 200°
Axial internal clearance	C3	Group 3 (C3), bigger than CN

Main Dimensions & Performance Data9 parameters

Main Dimensions & Performance Data
Parameter	Symbol	Value
Bore diameter	d	280 mm11.024 in
Outside diameter	D	500 mm19.685 in
Width	B	80 mm3.15 in
Basic dynamic load rating, radial	Cr	870,000 N195,593.525 lbf
Basic static load rating, radial	C0r	1,750,000 N393,435.252 lbf
Fatigue load limit, radial	Cur	49,000 N11,016.187 lbf
Limiting speed	nG	2,210 1/min
Reference speed	nϑr	1,000 1/min
Mass	≈m	73.1 kg161.158 lbs

Mounting dimensions3 parameters

Mounting dimensions
Parameter	Symbol	Value
Minimum diameter shaft shoulder	da min	300 mm11.811 in
Maximum diameter of housing shoulder	Da max	480 mm18.898 in
Maximum fillet radius	ra max	4 mm0.157 in

Dimensions9 parameters

Dimensions
Parameter	Symbol	Value
Minimum chamfer dimension	rmin	5 mm0.197 in
Shoulder diameter outer ring	D1	421.8 mm16.606 in
Shoulder diameter inner ring	d1	358.5 mm14.114 in
Distance between the apexes of the pressure cones	a	273.1 mm10.752 in
Hight retaining slot	an	15 mm0.591 in
Width retaining slot	bn	12.5 mm0.492 in
Radius retaining slot	rn	2.5 mm0.098 in
Angle retaining slot		45 °
Contact angle	α	35 °

Temperature range2 parameters

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

Capabilities & suitability7 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
Largebearing		Yes

Manufacturer Identity8 parameters

Product Identity2 parameters

Product Identity
Parameter	Symbol	Value
Construction		Four point contact bearing QJ2..-N2-MPA, holding grooves, solid brass cage
Short Description		Four-point contact bearing

Technical Data22 parameters

Technical Data
Parameter	Symbol	Value
Bore Diameter (D)		280 mm
Outside Diameter (D)		500 mm
Width (B)		80 mm
Basic Dynamic Load Rating, Radial (Cr)		870,000 N
Basic Static Load Rating, Radial (C0R)		1,750,000 N
Operating Temperature Min. (Tmin)		-30 °C
Limiting Speed (Ng)		2,210 1/min
Operating Temperature Max. (Tmax)		200 °C
Reference Speed (Nϑr)		1,000 1/min
Angle Retaining Slot (Angle Retain)		45 °
Hight Retaining Slot (An)		15 mm
Radius Retaining Slot (Rn)		2.5 mm
Fatigue Load Limit, Radial (Cur)		49,000 N
Minimum Diameter Shaft Shoulder (Da Min)		300 mm
Shoulder Diameter Inner Ring (D1)		358.5 mm
Maximum Diameter Of Housing Shoulder (Da Max)		480 mm
Minimum Chamfer Dimension (Rmin)		5 mm
Maximum Fillet Radius (Ra Max)		4 mm
Shoulder Diameter Outer Ring (D1)		421.8 mm
Contact Angle (Α)		35 °
Distance Between The Apexes Of The Pressure Cones (A)		273.1 mm
Width Retaining Slot (Bn)		12.5 mm

FAG QJ256-N2-MPA-C3