Page 148 - needle bearings

Machined-ring needle roller bearings
NTN

Inch series
With inner ring

Type MRʴʴMI

d 9.525ʙ34.925mm

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
28.575(1 !/8) 19.30 19.05(#/4) 0.6 15.875 2 16 700 16 700 1 700 1 700
9.525(#/8)
28.575(1 !/8) 25.65 25.40(1) 0.6 15.875 3 21 500 23 000 2 190 2 350
31.750(1 !/4) 19.30 19.05(#/4) 1 19.050 4 19 500 21 100 1 980 2 150
12.700(!/2)
31.750(1 !/4) 25.65 25.40(1) 1 19.050 2 25 000 29 100 2 550 2 970
34.925(1 #/8) 19.30 19.05(#/4) 1 22.225 1 21 900 25 600 2 240 2 610
15.875(%/8)
34.925(1 #/8) 25.65 25.40(1) 1 22.225 2 28 200 35 500 2 870 3 600
17.462(!!/16) 34.925(1 #/8) 19.30 19.05(#/4) 1 22.225 1.5 21 900 25 600 2 240 2 610

38.100(1 !/2) 19.30 19.05(#/4) 1 25.400 1 23 000 28 100 2 340 2 870
19.050(#/4)
38.100(1 !/2) 25.65 25.40(1) 1 25.400 1.5 29 500 38 500 3 000 3 950
20.638(!#/16) 38.100(1 !/2) 25.65 25.40(1) 1 25.400 2 29 500 38 500 3 000 3 950
41.275(1 %/8) 25.65 25.40(1) 1 28.575 1.5 32 500 45 000 3 300 4 600
22.225(&/8)
41.275(1 %/8) 32.00 31.75(1 !/4) 1 28.575 2 40 500 60 000 4 100 6 100
41.275(1 %/8) 25.65 25.40(1) 1 28.575 2 32 500 45 000 3 300 4 600
23.812(!%/16)
41.275(1 %/8) 32.00 31.75(1 !/4) 1 28.575 2 40 500 60 000 4 100 6 100
44.450(1 #/4) 25.65 25.40(1) 1 31.750 1.5 35 000 51 000 3 550 5 200
25.400(1)
44.450(1 #/4) 32.00 31.75(1 !/4) 1 31.750 2 43 500 68 000 4 450 6 950
47.625(1 &/8) 25.65 25.40(1) 1 34.925 3 37 000 57 500 3 800 5 850
28.575(1 !/8)
47.625(1 &/8) 32.00 31.75(1 !/4) 1 34.925 2 46 500 76 500 4 750 7 800
30.162(1 #/16) 52.388(2 !/16) 32.00 31.75(1 !/4) 1 38.100 2 51 000 81 500 5 200 8 300
52.388(2 !/16) 25.65 25.40(1) 1.5 38.100 0.5 41 000 61 000 4 150 6 250
31.750(1 !/4)
52.388(2 !/16) 32.00 31.75(1 !/4) 1.5 38.100 1 51 000 81 500 5 200 8 300
55.562(2 #/16) 25.65 25.40(1) 1.5 41.275 0.5 43 500 68 000 4 450 6 950
33.338(1 %/16)
55.562(2 #/16) 32.00 31.75(1 !/4) 1.5 41.275 1 54 500 90 500 5 550 9 250
55.562(2 #/16) 32.00 31.75(1 !/4) 1.5 41.275 0.5 54 500 90 500 5 550 9 250
34.925(1 #/8) 58.738(2 %/16) 25.65 25.40(1) 1.5 44.450 0.5 44 500 72 000 4 550 7 350
58.738(2 %/16) 32.00 31.75(1 !/4) 1.5 44.450 1 55 500 95 500 5 700 9 750

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

B-86