NJ248-E-TB-M1

Cylindrical roller bearing

Cylindrical roller bearing NJ..-E-M1, with cage, single row, semi-locating bearing, 2 ribs on outer ring, 1 rib on inner ring, type NJ

Display units

Metric

Imperial

Main Dimensions & Performance Data

d	240 mm	Bore diameter
D	440 mm	Outside diameter
B	72 mm	Width
C_r	1,140,000 N	Basic dynamic load rating, radial
C_0r	1,610,000 N	Basic static load rating, radial
C_ur	171,000 N	Fatigue load limit, radial
n_G	2,320 1/min	Limiting speed
n_ϑr	1,220 1/min	Reference speed
≈m	51.5 kg	Weight

Mounting dimensions

d_{a min}	257 mm	Minimum diameter shaft shoulder
d_{a max}	290 mm	Maximum diameter of shaft shoulder
D_{a max}	423 mm	Maximum diameter of housing shoulder
d_{c min}	315 mm	Minimum shaft shoulder
r_{a max}	3 mm	Maximum recess radius

Dimensions

r_min	4 mm	Minimum chamfer dimension
r_{1 min}	4 mm	Minimum chamfer dimension
s	6 mm	Axial displacement
E	393 mm	Raceway diameter outer ring
F	293 mm	Raceway diameter inner ring
D_{1 min}	373 mm	Minimum rib diameter outer ring
d₁	313 mm	Maximum rib diameter inner ring

Temperature range

T_min	-30 °C	Operating temperature min.
T_max	150 °C	Operating temperature max.

Additional information

HJ248-E

L-washer

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Design	TB	Bearings with increased axial load capacity
Cage	M1	Two Piece Brass Cage Roller Guided
Radial internal clearance	CN	Group N (CN)
Tolerance class	PN	Normal (PN)
Number of rolling element rows	1	Single-row design

Characteristics

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