*内輪/B126-B128/E_*内輪/B126-B128/E 11/05/25 10:07 ページ 127 Inner Rings
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1 Inner Rings
2 Inner Rings Inner Rings Inner Rings Many of the neele roller bearings use a shaft as the irect raceway surface without using inner ring. However, it is recommene to use any of the inner rings escribe hereuner, together with neele roller bearing, where applicable shaft can not be surface-harene an surface-finishe by grining. Any inner rings are mae of high carbon chrome bearing steel an finishe by grining after heat-treate. It is esirable to use an inner ring of wie with, where the axial isplacement of a shaft is great an also a seal is use at the outer sie of bearing. Types an Designs inner rings are available in both of IR type with bounary imensions of metric system an MI type with bounary imensions of inch system. Both eges of inner ring raceway are chamfere to form gentle tapers in orer to facilitate fitting of the inner ring. In contrast, inner rings whose inner ring number is heae by an asterisk (*) are provie with slight-chamfering so that they will offer a greater axial travel. In aition to these inner rings, manufacture of special inner ring type (suffix D) with oil hole on its center is also available. For applications that nee particularly high running accuracy, certain bearing users install the inner ring onto the shaft an then grin the raceway surface to targete accuracy. To fulfill this type of request, will supply a special inner ring whose raceway surface inclues a grining allowance. For etails, contact Engineering. Dimensional accuracy for inner ring The imensional accuracy (bore iameter "", with "B" an chamfer imension "rs min"), profile accuracy an running accuracy of the inner rings are as shown in Tables 4.3 an 4.5 of Section 4 "Bearing accuracy" (page A-26). An the stanar accuracy class of these items conforms to JIS Class-, but other inner rings conforming to JIS Class-5 an -4 are also offerable on request. Each inner ring has been finishe to the imensional tolerance of its raceway iameter (F) in the relevant imension table so that when the inner ring is combine with a neele roller bearing, the resultant raial internal clearance falls in a range of orinary clearance (refer to Table 5.1 in Sec. 5.2 Running clearance.) Composition of inner ring number Inner ring number consists of type coe (IR or MI)), imension coe [bore ia. () raceway ia. (F) with (B)] an a suffix. Note that the imensions of Type MI (inch series) inner rings measure in 1/16 increments. IR D Suffix Dimension coe Fig. 1 Type coe B-128
3 Type IR 5 1mm Bounary imensions Bearing numbers Abutment Mass imensions a ras 3) F 1) B rs min 2) t min max (approx.) IR IR IR IR IR IR IR IR D IR IR IR IR IR IR IR IR IR IR D IR IR IR IR IR IR IR IR IR IR D IR IR Note 1) Dimensional tolerance to secure orinary clearance when any of these inner rings is combine with neele roller bearing with no inner ring. 2) Allowable minimum chamfer imension r. 3) Max. allowable imension of raius ra for corner rounness on shaft/housing. Remarks: 1. Nominal number plus coe "D" represents inner ring with oil hole. 2. Nominal number plus -mark represents inner ring with fine-chamfere outer surface. B-129
4 Type IR 1 15mm Bounary imensions Bearing numbers Abutment Mass imensions a ras 3) F 1) B rs min 2) t min max (approx.) IR IR IR IR IR IR IR IR IR IR IR D IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR D IR IR Note 1) Dimensional tolerance to secure orinary clearance when any of these inner rings is combine with neele roller bearing with no inner ring. 2) Allowable minimum chamfer imension r. 3) Max. allowable imension of raius ra for corner rounness on shaft/housing. Remarks: 1. Nominal number plus coe "D" represents inner ring with oil hole. 2. Nominal number plus -mark represents inner ring with fine-chamfere outer surface. B-13
5 15 2mm Bounary imensions Bearing numbers Abutment Mass imensions a ras 3) F 1) B rs min 2) t min max (approx.) IR IR IR IR IR IR IR IR IR IR IR IR IR D IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR D IR IR IR Note 1) Dimensional tolerance to secure orinary clearance when any of these inner rings is combine with neele roller bearing with no inner ring. 2) Allowable minimum chamfer imension r. 3) Max. allowable imension of raius ra for corner rounness on shaft/housing. Remarks: 1. Nominal number plus coe "D" represents inner ring with oil hole. 2. Nominal number plus -mark represents inner ring with fine-chamfere outer surface. B-131
6 Type IR 2 28mm Bounary imensions Bearing numbers Abutment Mass imensions a ras 3) F 1) B rs min 2) t min max (approx.) IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR Note 1) Dimensional tolerance to secure orinary clearance when any of these inner rings is combine with neele roller bearing with no inner ring. 2) Allowable minimum chamfer imension r. 3) Max. allowable imension of raius ra for corner rounness on shaft/housing. Remarks: 1. Nominal number plus -mark represents inner ring with fine-chamfere outer surface. B-132
7 28 35mm Bounary imensions Bearing numbers Abutment Mass imensions a ras 3) F 1) B rs min 2) t min max (approx.) IR IR IR IR IR IR IR IR IR IR D IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR Note 1) Dimensional tolerance to secure orinary clearance when any of these inner rings is combine with neele roller bearing with no inner ring. 2) Allowable minimum chamfer imension r. 3) Max. allowable imension of raius ra for corner rounness on shaft/housing. Remarks: 1. Nominal number plus coe "D" represents inner ring with oil hole. 2. Nominal number plus -mark represents inner ring with fine-chamfere outer surface. B-133
8 Type IR 35 45mm Bounary imensions Bearing numbers Abutment Mass imensions a ras 3) F 1) B rs min 2) t min max (approx.) IR IR IR IR IR IR IR D IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR Note 1) Dimensional tolerance to secure orinary clearance when any of these inner rings is combine with neele roller bearing with no inner ring. 2) Allowable minimum chamfer imension r. 3) Max. allowable imension of raius ra for corner rounness on shaft/housing. Remarks: 1. Nominal number plus coe "D" represents inner ring with oil hole. 2. Nominal number plus -mark represents inner ring with fine-chamfere outer surface. B-134
9 45 55mm Bounary imensions Bearing numbers Abutment Mass imensions a ras 3) F 1) B rs min 2) t min max (approx.) IR IR IR IR IR IR D IR IR IR IR IR IR IR IR IR IR IR D IR IR IR IR IR IR IR IR IR IR IR IR IR IR Note 1) Dimensional tolerance to secure orinary clearance when any of these inner rings is combine with neele roller bearing with no inner ring. 2) Allowable minimum chamfer imension r. 3) Max. allowable imension of raius ra for corner rounness on shaft/housing. Remarks: 1. Nominal number plus coe "D" represents inner ring with oil hole. 2. Nominal number plus -mark represents inner ring with fine-chamfere outer surface. B-135
10 Type IR 6 75mm Bounary imensions Bearing numbers Abutment Mass imensions a ras 3) F 1) B rs min 2) t min max (approx.) IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR Note 1) Dimensional tolerance to secure orinary clearance when any of these inner rings is combine with neele roller bearing with no inner ring. 2) Allowable minimum chamfer imension r. 3) Max. allowable imension of raius ra for corner rounness on shaft/housing. B-136
11 8 1mm Bounary imensions Bearing numbers Abutment Mass imensions a ras 3) F 1) B rs min 2) t min max (approx.) IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR Note 1) Dimensional tolerance to secure orinary clearance when any of these inner rings is combine with neele roller bearing with no inner ring. 2) Allowable minimum chamfer imension r. 3) Max. allowable imension of raius ra for corner rounness on shaft/housing. B-137
12 Type IR 1 16mm Bounary imensions Bearing numbers Abutment Mass imensions a ras 3) F 1) B rs min 2) t min max (approx.) IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR Note 1) Dimensional tolerance to secure orinary clearance when any of these inner rings is combine with neele roller bearing with no inner ring. 2) Allowable minimum chamfer imension r. 3) Max. allowable imension of raius ra for corner rounness on shaft/housing. B-138
13 17 38mm Bounary imensions Bearing numbers Abutment Mass imensions a ras 3) F 1) B rs min 2) t min max (approx.) IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR IR Note 1) Dimensional tolerance to secure orinary clearance when any of these inner rings is combine with neele roller bearing with no inner ring. 2) Allowable minimum chamfer imension r. 3) Max. allowable imension of raius ra for corner rounness on shaft/housing. B-139
14 Type IR 4 44mm Bounary imensions Bearing numbers Abutment Mass imensions a ras 3) F 1) B rs min 2) t min max (approx.) IR IR IR Note 1) Dimensional tolerance to secure orinary clearance when any of these inner rings is combine with neele roller bearing with no inner ring. 2) Allowable minimum chamfer imension r. 3) Max. allowable imension of raius ra for corner rounness on shaft/housing. B-14
15 Inch series Type MI mm Bounary imensions Bearing numbers Abutment Mass imensions mm (!/25.4mm) mm kg a ras 3) F 1) B rs min 2) t min max (approx.) ((/16) MI (#/8) (%/8) MI (%/8) MI (#/4) MI (!/2) 19.5(#/4) MI (#/4) MI (%/8) 19.5(#/4) (&/8) (&/8) MI (&/8) MI (&/8) MI (&/8) MI (1) MI (1) MI (1!/8) MI (1!/8) MI (1!/8) MI (1!/8) MI (1!/4) MI (1) (1!/4) MI (1!/4) MI (1 #/8) MI (1!/8) (1 #/8) MI (1 #/8) MI (1!/4) (1 %/16) (1 #/8) 38.1(1!/2) MI (1!/2) MI (1 %/8) MI (1 %/8) MI (1 %/8) MI (1 #/4) MI Note 1) Dimensional tolerance to secure orinary clearance when any of these inner rings is combine with neele roller bearing with no inner ring. 2) Allowable minimum chamfer imension r. 3) Max. allowable imension of raius ra for corner rounness on shaft/housing. Remarks: 1. Nominal number plus -mark represents inner ring with fine-chamfere outer surface. r B-141
16 Inch series Type MI mm Bounary imensions Bearing numbers Abutment Mass imensions mm (!/25.4mm) mm kg a ras 3) F 1) B rs min 2) t min max (approx.) (1 #/8) 44.45(1 #/4) MI (1 #/4) MI (1!/2) (1 #/4) MI (1 (/16) (1 &/8) MI (1 %/8) 5.8(2) MI (2) MI (1 #/4) 5.8(2) 57.15(2!/4) MI (2!/4) MI (2!/2) MI (2!/2) MI (2 #/4) MI (2!/4) 69.85(2 #/4) MI (2 #/4) MI (2!/2) 76.2(3) MI (3) MI (2 %/8) 82.55(3!/4) MI (3!/4) MI (2 #/4) 82.55(3!/4) MI (3) 88.9(3!/2) MI (3!/2) MI (3!/8) 95.25(3 #/4) MI (3 #/8) 11.6(4) MI (3 %/8) 17.95(4!/4) MI (3 #/4) 114.3(4!/2) MI (3 &/8) 114.3(4!/2) MI (4!/2) MI Note 1) Dimensional tolerance to secure orinary clearance when any of these inner rings is combine with neele roller bearing with no inner ring. 2) Allowable minimum chamfer imension r. 3) Max. allowable imension of raius ra for corner rounness on shaft/housing. B-142
17 mm Bounary imensions Bearing numbers Abutment Mass imensions mm (!/25.4mm) mm kg a ras 3) F 1) B rs min 2) t min max (approx.) 127.(5) MI (4) 127.(5) MI (5) MI (5!/2) MI (4!/2) (5!/2) MI (4 #/4) 146.5(5 #/4) MI (5) 152.4(6) MI (6) MI (5!/2) 165.1(6!/2) MI (6!/2) MI (6) (7!/4) MI (6!/2) (7 #/4) MI (7) (8!/4) MI (7!/2) (8 #/4) MI (8) (9!/4) MI Note 1) Dimensional tolerance to secure orinary clearance when any of these inner rings is combine with neele roller bearing with no inner ring. 2) Allowable minimum chamfer imension r. 3) Max. allowable imension of raius ra for corner rounness on shaft/housing. B-143
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