Page 157 - needle bearings

Machined-ring needle roller bearings sealed type
NTN

With inner ring

Type NA49ʝʝL
Type NA49ʝʝLL

Type NA49ʝL Type NA49ʝLL
(With single seal) (With double seal)

d 10ʙ50mm

Boundary dimensions Basic load ratings Limiting Bearing numbers Abutment Mass
dynamic static dynamic static speeds dimensions
mm N kgf r/min mm kg
grease Type Type da Da Db ras
d D B C rs min 1) F Cr Cor Cr Cor NA49ʝʝL RNA49ʝʝLL min max max max (approx.)
10 22 14 13 0.3 14 7 200 8 500 735 865 10 000 NA4900L NA4900LL 12 16 20 0.3 0.025

12 24 14 13 0.3 16 7 750 9 700 795 990 10 000 NA4901L NA4901LL 14 18 22 0.3 0.028
15 28 14 13 0.3 20 8 300 11 200 845 1 150 10 000 NA4902L NA4902LL 17 22 26 0.3 0.036
17 30 14 13 0.3 22 8 500 11 900 865 1 220 9 000 NA4903L NA4903LL 19 24 28 0.3 0.039
20 37 18 17 0.3 25 15 200 19 900 1 550 2 030 8 000 NA4904L NA4904LL 22 28 35 0.3 0.080

25 42 18 17 0.3 30 16 000 22 600 1 640 2 300 6 500 NA4905L NA4905LL 27 33 40 0.3 0.093
30 47 18 17 0.3 35 18 000 27 400 1 830 2 800 5 500 NA4906L NA4906LL 32 38 45 0.3 0.107
35 55 21 20 0.6 42 22 700 39 500 2 320 4 000 4 800 NA4907L NA4907LL 39 45 51 0.6 0.175
40 62 23 22 0.6 48 27 800 53 500 2 830 5 450 4 200 NA4908L NA4908LL 44 51 58 0.6 0.252

45 68 23 22 0.6 52 28 600 57 000 2 920 5 800 3 800 NA4909L NA4909LL 49 55 64 0.6 0.290
50 72 23 22 0.6 58 30 500 64 000 3 100 6 500 3 400 NA4910L NA4910LL 54 61 68 0.6 0.295

Note 1) Allowable minimum chamfer dimension r .

B-95