Page 140 - needle bearings

Machined-ring needle roller bearings
NTN

With inner ring

Type NA48 C
r
Type NA49
r
s

ПD ПdПF

d 300ʙ440mm

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 1ʣ F s 2ʣ Cr Cor Cr Cor
380 80 2.1 330 2 625 000 1 770 000 64 000 180 000 800 1 200 NA4860
300
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
320
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
340
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
360
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
380
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