Page 150 - needle bearings

Machined-ring needle roller bearings
NTN

Inch series
With inner ring

Type MRʴʴMI

d ʙ NN

Boundary dimensions Basic load ratings
dynamic static dynamic static
mm (!/25 . 4mm) N kgf

d D B C rs min 1) F s 2) Cr Cor Cr Cor
58.738(2 %/16) 25.65 25.40(1) 1.5 44.450 0.5 44 500 72 000 4 550 7 350
36.512(1 &/16)
58.738(2 %/16) 32.00 31.75(1 !/4) 1.5 44.450 0.5 55 500 95 500 5 700 9 750
58.738(2 %/16) 25.65 25.40(1) 1.5 44.450 0.5 44 500 72 000 4 550 7 350
38.100(1 !/2) 58.738(2 %/16) 32.00 31.75(1 !/4) 1.5 44.450 0.5 55 500 95 500 5 700 9 750
65.088(2 (/16) 32.00 31.75(1 !/4) 1.5 50.800 0.5 62 000 114 000 6 300 11 700
61.912(2 &/16) 32.00 31.75(1 !/4) 1.5 47.625 1 59 000 105 000 6 000 10 700
39.688(1 (/16)
65.088(2 (/16) 32.00 31.75(1 !/4) 1.5 50.800 0.5 62 000 114 000 6 300 11 700
65.088(2 (/16) 25.65 25.40(1) 1.5 50.800 0.5 49 500 86 000 5 050 8 800
41.275(1 %/8)
65.088(2 (/16) 32.00 31.75(1 !/4) 1.5 50.800 1 62 000 114 000 6 300 11 700
65.088(2 (/16) 25.65 25.40(1) 1.5 50.800 0.5 49 500 86 000 5 050 8 800
42.682(1 !!/16)
65.088(2 (/16) 32.00 31.75(1 !/4) 1.5 50.800 0.5 62 000 114 000 6 300 11 700
76.200(3) 38.35 38.10(1 !/2) 1.5 57.150 3.5 83 500 142 000 8 500 14 500
44.450(1 #/4)
76.200(3) 44.70 44.45(1 #/4) 1.5 57.150 3.5 97 000 173 000 9 850 17 600
82.550(3 !/4) 38.35 38.10(1 !/2) 2 63.500 1.5 88 000 158 000 8 950 16 100
49.212(1 !%/16)
82.550(3 !/4) 44.70 44.45(1 #/4) 2 63.500 2 102 000 191 000 10 400 19 500
82.550(3 !/4) 38.35 25.40(1) 2 63.500 2.5 88 000 158 000 8 950 16 100
50.800(2)
82.550(3 !/4) 44.70 44.45(1 #/4) 2 63.500 3 102 000 191 000 10 400 19 500
55.562(2 #/16) 88.900(3 !/2) 44.70 44.45(1 #/4) 2 69.850 1.5 107 000 209 000 10 900 21 300
88.900(3 !/2) 25.65 25.40(1) 2 69.850 0.5 66 000 112 000 6 700 11 400
57.150(2 !/4) 88.900(3 !/2) 38.35 38.10(1 !/2) 2 69.850 2.5 92 000 173 000 9 400 17 600
88.900(3 !/2) 44.70 44.45(1 #/4) 2 69.850 3 107 000 209 000 10 900 21 300
60.325(2 #/8) 95.250(3 #/4) 44.70 44.45(1 #/4) 2 76.200 1.5 112 000 227 000 11 400 23 200
95.250(3 #/4) 38.35 38.10(1 !/2) 2 76.200 2.5 96 000 188 000 9 800 19 100
63.500(!/2)
95.250(3 #/4) 44.70 44.45(1 #/4) 2 76.200 3 112 000 227 000 11 400 23 200
107.950(4 !/4) 44.70 44.45(1 #/4) 2 82.550 3 134 000 240 000 13 600 24 500
66.675(2 %/8)
107.950(4 !/4) 51.05 50.80(2) 2 82.550 5.5 146 000 268 000 14 900 27 400

Note 1) Allowable minimum chamfer dimension r . 2) Allowable axial stroking value of inner ring against outer ring.

B-88