Needle Roller Bearings - Ntn-snr.com

Machined-ring needle roller bearings
NTN
With inner ring
Type NA48
Type NA49
r
C
r
s
D
dF
d
300440mm
Boundary dimensions Basic load ratings Limiting speeds Bearing numbers
dynamic static dynamic static
mm N kgf r/min
grease oil
d D C rs min 1 F s 2 Cr Cor Cr Cor
300
320
340
360
380
380 80 2.1 330 2 625 000 1 770 000 64 000 180 000 800 1 200 NA4860
420 118 3 340 2 1 080 000 2 640 000 110 000 269 000 800 1 200 NA4960
400 80 2.1 350 2 640 000 1 850 000 65 500 189 000 750 1 100 NA4864
440 118 3 360 2 1 120 000 2 820 000 114 000 288 000 750 1 100 NA4964
420 80 2.1 370 2 655 000 1 940 000 66 500 197 000 750 1 100 NA4868
460 118 3 380 2 1 160 000 3 000 000 118 000 305 000 750 1 100 NA4968
440 80 2.1 390 2 665 000 2 020 000 68 000 206 000 650 1 000 NA4872
480 118 3 400 2 1 200 000 3 200 000 122 000 325 000 650 1 000 NA4972
480 100 2.1 415 2 1 000 000 2 840 000 102 000 289 000 650 950 NA4876
520 140 4 430 2 1 400 000 3 750 000 143 000 385 000 650 950 NA4976
400 540 140 4 450 2.5 1 450 000 4 000 000 148 000 410 000 600 900 NA4980
420 560 140 4 470 2.5 1 500 000 4 250 000 153 000 430 000 550 850 NA4984
440 600 160 4 490 2.5 1 750 000 4 600 000 179 000 470 000 550 800 NA4988
Note 1) Allowable minimum chamfer dimension r .
2) Allowable axial stroking value of inner ring against outer ring.
B-78