Page 144 - needle bearings

Machined-ring needle roller bearings
NTN

Inch series
Without inner ring

Type MR

FW 63.500ʙ184.150mm

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.)
63.500(2 !/2) +0.049 82.550(3 !/4) 44.45(1 #/4) 2 102 000 191 000 10 400 19 500 4 300 6 500
+0.030
88.900(3 !/2) 25.40(1) 2 66 000 112 000 6 700 11 400 3 700 5 500
+0.049
69.850(2 #/4) +0.030 88.900(3 !/2) 38.10(1 !/2) 2 92 000 173 000 9 400 17 600 3 700 5 500
88.900(3 !/2) 44.45(1 #/4) 2 107 000 209 000 10 900 21 300 3 700 5 500
95.250(3 #/4) 38.10(1 !/2) 2 96 000 188 000 9 800 19 100 3 300 5 000
+0.049
76.200(3) +0.030
95.250(3 #/4) 44.45(1 #/4) 2 112 000 227 000 11 400 23 200 3 300 5 000
107.950(4 !/4) 44.45(1 #/4) 2 134 000 240 000 13 600 24 500 3 300 5 000
+0.058
82.550(3 !/4) +0.036
107.950(4 !/4) 50.80(2) 2 146 000 268 000 14 900 27 400 3 300 5 000
114.300(4 !/2) 44.45(1 #/4) 2 141 000 264 000 14 400 26 900 3 000 4 500
+0.058
88.900(3 !/2) +0.036
114.300(4 !/2) 50.80(2) 2 154 000 295 000 15 700 30 000 3 000 4 500
+0.058
95.250(3 #/4) +0.036 120.650(4 #/4) 50.80(2) 2.5 162 000 320 000 16 500 32 500 2 800 4 200
+0.058
101.600(4) +0.036 127.000(5) 50.80(2) 2.5 169 000 345 000 17 200 35 500 2 600 3 900
+0.058
107.950(4 !/4) +0.036 133.350(5 !/4) 50.80(2) 2.5 172 000 360 000 17 500 37 000 2 500 3 700
152.400(6) 57.15(2 !/4) 2.5 238 000 435 000 24 300 44 500 2 300 3 500
+0.058
114.300(4 !/2)
+0.036
152.400(6) 63.50(2 !/2) 2.5 260 000 485 000 26 500 49 500 2 300 3 500
165.100(6 !/2) 50.80(2) 2.5 227 000 425 000 23 200 43 000 2 100 3 100
+0.068
127.000(5) +0.043 165.100(6 !/2) 57.15(2 !/4) 2.5 250 000 480 000 25 500 49 000 2 100 3 100
165.100(6 !/2) 63.50(2 !/2) 2.5 273 000 535 000 27 800 54 500 2 100 3 100
177.800(7) 63.50(2 !/2) 2.5 285 000 585 000 29 100 59 500 1 900 2 900
+0.068
139.700(5 !/2) +0.043
177.800(7) 76.20(3) 2.5 345 000 740 000 35 000 75 500 1 900 2 900
+0.068
146.050(5 #/4) +0.043 184.150(7 !/4) 76.20(3) 3 360 000 775 000 36 500 79 000 1 800 2 700
190.500(7 !/2) 63.50(2 !/2) 3 310 000 630 000 31 500 64 000 1 700 2 600
+0.068
152.400(6)
+0.043
190.500(7 !/2) 76.20(3) 3 375 000 800 000 38 000 81 500 1 700 2 600
203.200(8) 63.50(2 !/2) 3 325 000 680 000 33 000 69 500 1 600 2 400
+0.068
165.100(6 !/2) +0.043
203.200(8) 76.20(3) 3 390 000 870 000 39 500 88 500 1 600 2 400
+0.079
184.150(7 !/4) +0.050 231.775(9 !/8) 76.20(3) 3 435 000 915 000 44 500 93 000 1 500 2 200

Note 1) Allowable minimum chamfer dimension r.

B-82