Bearings, units and housings -- Ball bearings -- Angular contact ball bearings -- Four-point contact ball bearings -- Angular contact ball bearings, four-point contact ball bearings SKF QJ 228 N2MA

QJ 228 N2MA

SKF Explorer

Dimensions

d		140	mm
D		250	mm
B		42	mm
d₁	≈	179	mm
D₁	≈	211	mm
a		137	mm
h		11.7	mm
b		10.5	mm
r₀		2	mm
r_1,2	min.	3	mm

Abutment dimensions

d_a	min.	154	mm
D_a	max.	236	mm
r_a	max.	2.5	mm

Calculation data

Basic dynamic load rating	C	345	kN
Basic static load rating	C₀	475	kN
Fatigue load limit	P_u	14.3	kN
Limiting speed		4300	r/min
Calculation factor	A	555.53
Calculation factor	e	0.95
Calculation factor	X	0.6
Calculation factor	Y₀	0.58
Calculation factor	Y₁	0.66
Calculation factor	Y₂	1.07

Mass

Mass bearing

9.85

Model Number: QJ 228 N2MA
Inner Diameter：140mm Outer Diameter：250mm Width：42mm
Reference speed:4300 r/min Limiting speed:-
Type：Bearings, units and housings Ball bearings Angular contact ball bearings Four-point contact ball bearings
Details： Four-point contact ball bearings Angular contact ball bearings, four-point contact ball bearings
Update date：2026-06-24
Application:Textile Accessories,Vertical machining,packing equipment,Broadcasting System,Surveying Surveying Instruments,pneumatic,spectrometer,Garment Accessories,noise inspection,medical equipment,powder metallurgy
Similar models:NU 228 ECM K 81228 M 6211-2Z/VA228 SY 2.3/16 TF/VA228 SY 1.3/16 TF/VA228 32240T228/DB BD-22228 CCK/W33-AHX 3128 YAR 211-200-2FW/VA228 6310-2Z/VA228 SY 40 TF/VA228
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Model No. Inner Diameter Outer Diameter Width Type

15773
31324 X/DF
PSMF 162225 A51
SAF 1620 x 3.3/8 TLC
STO 8 TN

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Hot number： 231/750 CAK/W33 24x50x10 HMSA10 RG 527474 6212 NR 7203 BE-2RZP 84641 BK 1812 HJ 208 EC NNU 49/600 B/SPW33X OKCS 310 PCZ 2222 E SAFS 23056 KATLC x 10.1/2 SNL 3080 TURA SSAFS 22522 x 3.13/16 W 619/2-2Z

Model No.	Inner Diameter	Outer Diameter	Width	Type
15773
31324 X/DF
PSMF 162225 A51
SAF 1620 x 3.3/8 TLC
STO 8 TN