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		QJ234
Bore diameter	d	170 mm
Outside diameter	D	310 mm
Width	B	52 mm
Basic dynamic load rating	C	420 kN
Basic static load rating	C0	630 kN
Fatigue load limit	Pu	23.5 kN
Reference speed	nref	2010 r/min
Limiting speed	nG	3750 r/min
Mass	≈m	18.7 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	170 mm6.693 in
Outside diameter	D	310 mm12.205 in
Width	B	52 mm2.047 in
Basic dynamic load rating, radial	Cr	420,000 N94,424.46 lbf
Basic static load rating, radial	C0r	630,000 N141,636.691 lbf
Fatigue load limit, radial	Cur	23,500 N5,283.273 lbf
Limiting speed	nG	3,750 1/min
Reference speed	nϑr	2,010 1/min
Mass	≈m	18.7 kg41.226 lbs

Mounting dimensions3 parameters

Mounting dimensions
Parameter	Symbol	Value
Minimum diameter shaft shoulder	da min	187 mm7.362 in
Maximum diameter of housing shoulder	Da max	293 mm11.535 in
Maximum fillet radius	ra max	3 mm0.118 in

Dimensions9 parameters

Dimensions
Parameter	Symbol	Value
Minimum chamfer dimension	rmin	4 mm0.157 in
Shoulder diameter outer ring	D1	260.5 mm10.256 in
Shoulder diameter inner ring	d1	221.54 mm8.722 in
Distance between the apexes of the pressure cones	a	168 mm6.614 in
Hight retaining slot	an	12.7 mm0.5 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)		170 mm
Outside Diameter (D)		310 mm
Width (B)		52 mm
Basic Dynamic Load Rating, Radial (Cr)		420,000 N
Basic Static Load Rating, Radial (C0R)		630,000 N
Operating Temperature Min. (Tmin)		-30 °C
Limiting Speed (Ng)		3,750 1/min
Operating Temperature Max. (Tmax)		200 °C
Reference Speed (Nϑr)		2,010 1/min
Angle Retaining Slot (Angle Retain)		45 °
Hight Retaining Slot (An)		12.7 mm
Radius Retaining Slot (Rn)		2 mm
Fatigue Load Limit, Radial (Cur)		23,500 N
Minimum Diameter Shaft Shoulder (Da Min)		187 mm
Shoulder Diameter Inner Ring (D1)		221.54 mm
Maximum Diameter Of Housing Shoulder (Da Max)		293 mm
Minimum Chamfer Dimension (Rmin)		4 mm
Maximum Fillet Radius (Ra Max)		3 mm
Shoulder Diameter Outer Ring (D1)		260.5 mm
Contact Angle (Α)		35 °
Distance Between The Apexes Of The Pressure Cones (A)		168 mm
Width Retaining Slot (Bn)		10.5 mm

FAG QJ234-N2-MPA