Page 146 - needle bearings

Machined-ring needle roller bearings
NTN

Inch series
Without inner ring

Type MR

FW 196.850ʙ234.950mm

Boundary dimensions Basic load ratings Limiting speeds
dynamic static dynamic static
mm N kgf r/min
grease oil
Fw D C rs min 1) Cr Cor Cr Cor (approx.)
196.850(7 #/4) +0.079 244.475(9 %/8) 76.20(3) 3 455 000 990 000 46 500 101 000 1 300 2 000
+0.050
+0.079
209.550(8 !/4) +0.050 257.175(10 !/8) 76.20(3) 3 475 000 1 060 000 48 500 109 000 1 300 1 900
+0.079
222.250(8 #/4) +0.050 269.875(10 %/8) 76.20(3) 4 495 000 1 140 000 50 500 116 000 1 200 1 800
+0.079
234.950(9 !/4) +0.050 282.575(11 !/8) 76.20(3) 4 510 000 1 210 000 52 000 124 000 1 100 1 700

Note 1) Allowable minimum chamfer dimension r.

B-84