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		QJ228
Bore diameter	d	140 mm
Outside diameter	D	250 mm
Width	B	42 mm
Basic dynamic load rating	C	315 kN
Basic static load rating	C0	420 kN
Fatigue load limit	Pu	16.9 kN
Reference speed	nref	2600 r/min
Limiting speed	nG	4700 r/min
Mass	≈m	9.371 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	CN	Group N (CN)

Main Dimensions & Performance Data9 parameters

Main Dimensions & Performance Data
Parameter	Symbol	Value
Bore diameter	d	140 mm5.512 in
Outside diameter	D	250 mm9.843 in
Width	B	42 mm1.654 in
Basic dynamic load rating, radial	Cr	315,000 N70,818.345 lbf
Basic static load rating, radial	C0r	420,000 N94,424.46 lbf
Fatigue load limit, radial	Cur	16,900 N3,799.46 lbf
Limiting speed	nG	4,700 1/min
Reference speed	nϑr	2,600 1/min
Mass	≈m	9.371 kg20.659 lbs

Mounting dimensions3 parameters

Mounting dimensions
Parameter	Symbol	Value
Minimum diameter shaft shoulder	da min	154 mm6.063 in
Maximum diameter of housing shoulder	Da max	236 mm9.291 in
Maximum fillet radius	ra max	2.5 mm0.098 in

Dimensions9 parameters

Dimensions
Parameter	Symbol	Value
Minimum chamfer dimension	rmin	3 mm0.118 in
Shoulder diameter outer ring	D1	210.5 mm8.287 in
Shoulder diameter inner ring	d1	180.02 mm7.087 in
Distance between the apexes of the pressure cones	a	136.5 mm5.374 in
Hight retaining slot	an	11.7 mm0.461 in
Width retaining slot	bn	10.5 mm0.413 in
Radius retaining slot	rn	2 mm0.079 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 & 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 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)		140 mm
Outside Diameter (D)		250 mm
Width (B)		42 mm
Basic Dynamic Load Rating, Radial (Cr)		315,000 N
Basic Static Load Rating, Radial (C0R)		420,000 N
Operating Temperature Min. (Tmin)		-30 °C
Limiting Speed (Ng)		4,700 1/min
Operating Temperature Max. (Tmax)		200 °C
Reference Speed (Nϑr)		2,600 1/min
Angle Retaining Slot (Angle Retain)		45 °
Hight Retaining Slot (An)		11.7 mm
Radius Retaining Slot (Rn)		2 mm
Fatigue Load Limit, Radial (Cur)		16,900 N
Minimum Diameter Shaft Shoulder (Da Min)		154 mm
Shoulder Diameter Inner Ring (D1)		180.02 mm
Maximum Diameter Of Housing Shoulder (Da Max)		236 mm
Minimum Chamfer Dimension (Rmin)		3 mm
Maximum Fillet Radius (Ra Max)		2.5 mm
Shoulder Diameter Outer Ring (D1)		210.5 mm
Contact Angle (Α)		35 °
Distance Between The Apexes Of The Pressure Cones (A)		136.5 mm
Width Retaining Slot (Bn)		10.5 mm

FAG QJ228-N2-MPA