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NA4844 - NTN

NA4844

Needle roller bearing, machined-rings, with inner ring, double-side ribs

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Technical datasheet

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Specs

PRODUCT DEFINITION

d - Internal diameter 220 mm
D - External diameter 270 mm
C - Width of bearing, drawn cup or outer ring 50 mm
F - Under roller diameter 240 mm
rs - Min fillet radius 1,5 mm
s - Max axial offset 1,5 mm
Lubrication hole on outer ring Yes
k - Hole diameter 4 mm
Lubrication hole on inner ring No
Radial clearance class CN
Precision class P0
Mass 6,37 kg
Brand NTN
Product classification image

PRODUCT PERFORMANCE

Cr - Dynamic load rating 244 kN
C0r - Static load rating 780 kN
Nlim - Grease lubrication limit speed 1100 tr/min
Nlim - Oil lubrication limit speed 1700 tr/min
Tmin - Min operating temperature -20 °C
Tmax - Max operating temperature 120 °C

ABUTMENT

da min - Min shoulder diameter IR 228 mm
Da max - Max shoulder diameter OR 262 mm
ras max - Max shaft & housing fillet radius 1,5 mm