Page 152 - needle bearings

Machined-ring needle roller bearings
NTN

Inch series
With inner ring

Type MRʴʴMI

d 69.850ʙ127.000mm

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
107.950(4 !/4) 44.70 44.45(1 #/4) 2 82.550 1.5 134 000 240 000 13 600 24 500
69.850(2 #/4)
107.950(4 !/4) 51.05 50.80(2) 2 82.550 3 146 000 268 000 14 900 27 400
74.612(2 !%/16) 114.300(4 !/2) 51.05 50.80(2) 2 88.900 3 154 000 295 000 15 700 30 000

114.300(4 !/2) 44.70 44.45(1 #/4) 2 88.900 3 141 000 264 000 14 400 26 900
76.200(3)
114.300(4 !/2) 51.05 50.80(2) 2 88.900 5.5 154 000 295 000 15 700 30 000
79.375(3 !/8) 120.650(4 #/4) 51.05 50.80(2) 2.5 95.250 5.5 162 000 320 000 16 500 32 500
120.650(4 #/4) 51.05 50.80(2) 2.5 95.250 2.5 162 000 320 000 16 500 32 500
82.550(3 !/4)
127.000(5) 51.05 50.80(2) 2.5 101.600 2.5 169 000 345 000 17 200 35 500
85.725(3 #/8) 127.000(5) 51.05 50.80(2) 2.5 101.600 4.5 169 000 345 000 17 200 35 500
127.000(5) 51.05 50.80(2) 2.5 101.600 2.5 169 000 345 000 17 200 35 500
88.900(3 !/2)
133.350(5 !/4) 51.05 50.80(2) 2.5 107.950 2.5 172 000 360 000 17 500 37 000
92.075(3 %/8) 133.350(5 !/4) 51.05 50.80(2) 2.5 107.950 4.5 172 000 360 000 17 500 37 000
133.350(5 !/4) 51.05 50.80(2) 2.5 107.950 2.5 172 000 360 000 17 500 37 000
95.250(3 #/4) 152.400(6) 57.40 57.15(2 !/4) 2.5 114.300 3 238 000 435 000 24 300 44 500
152.400(6) 63.88 63.50(2 !/2) 2.5 114.300 4 260 000 485 000 26 500 49 500
152.400(6) 57.40 57.15(2 !/4) 2.5 114.300 5.5 238 000 435 000 24 300 44 500
98.425(3 &/8)
152.400(6) 63.88 63.50(2 !/2) 2.5 114.300 7 260 000 485 000 26 500 49 500
165.100(6 !/2) 51.05 50.80(2) 2.5 127.000 2.5 227 000 425 000 23 200 43 000
101.600(4) 165.100(6 !/2) 57.40 57.15(2 !/4) 2.5 127.000 5.5 250 000 480 000 25 500 49 000
165.100(6 !/2) 63.88 57.15(2 !/4) 2.5 127.000 7 273 000 535 000 27 800 54 500
107.950(4 !/4) 165.100(6 !/2) 57.40 57.15(2 !/4) 2.5 127.000 3 250 000 480 000 25 500 49 000
177.800(7) 63.88 63.50(2 !/2) 2.5 139.700 5.5 285 000 585 000 29 100 59 500
114.300(4 !/2)
177.800(7) 76.58 76.20(3) 2.5 139.700 7 345 000 740 000 35 000 75 500
120.650(4 #/4) 184.150(7 !/4) 82.55 76.20(3) 3 146.050 3 360 000 775 000 36 500 79 000
190.500(7 !/2) 63.88 63.50(2 !/2) 3 152.400 7 310 000 630 000 31 500 64 000
127.000(5)
190.500(7 !/2) 76.58 76.20(3) 3 152.400 5.5 375 000 800 000 38 000 81 500

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

B-90