IR LR Inner Ring

As an essential component of needle roller bearings, IR (inner ring) and LR (inner ring with lubrication hole) play an important role in reducing friction and extending the bearing’s service life. They are designed to be easily fitted onto the shaft, providing accurate positioning for the needle rollers and ensuring smooth rotation. The use of IR and LR can also help to reduce noise and vibration during operation. Additionally, the inner rings can be used as raceways for certain types of needle roller and cage assemblies, allowing for a compact and lightweight design.

Technial Specification

Table 1

Shaft Diameter	Bearing Designation	Boundary Dimensions			Mass Approx
Shaft Diameter		d	F	B	Mass Approx
mm		mm			g
7.8	IR06x12x10.5C	7.8	12.2	10.7	0
100	IR100x110x30	100	110	30	370
100	IR100x110x40	100	110	40	505
100	IR100x115x40	100	115	40	775
10	IR10x14x12	10	14	12	7.3
10	IR10x14x13	10	14	13	7.4
10	IR10x14x14	10	14	14	8
10	IR10x14x16	10	14	16	9.2
10	IR10x14x20	10	14	20	11.6
110	IR110x120x30	110	120	30	409
110	IR110x125x40	110	125	40	840
120	IR120x130x30	120	130	30	442
120	IR120x135x45	120	135	45	1000
130	IR120x145x35	130	145	35	855
12	IR12x14x15.5	12	17	15.5	0
12	IR12x15x12	12	15	12	5.8
12	IR12x15x16	12	15	16	8
12	IR12x16x12	12	16	12	7.9
12	IR12x16x12	12	16	12	0
12	IR12x16x13	12	16	13	8.7
12	IR12x16x14	12	16	14	9.5
12	IR12x16x16	12	16	16	10.9
12	IR12x16x20	12	16	20	13.5
12	IR12x16x22	12	16	22	14.9
12	IR12x16x22.5	12	16	22.5	0
12	IR12x17x22.5	12	17	22.5	0
130	IR130x150x50	130	150	50	1690
140	IR140x155x35	140	155	35	917
140	IR140x160x50	140	160	50	1800
150	IR150x165x40	150	165	40	1120
15	IR15x18x16	15	18	16	9.6
15	IR15x18x16.5	15	18	16.5	9.9
15	IR15x19x16	15	19	16	12.8
15	IR15x19x20	15	19	20	16.4
15	IR15x20x12	15	20	12	12.1
15	IR15x20x13	15	20	13	13.5
15	IR15x20x14	15	20	14	14.7
15	IR15x20x23	15	20	23	24.4
160	IR160x175x40	160	175	40	1200
17	IR17x20x16	17	20	16	10.7
17	IR17x20x20	17	20	20	13.5
17	IR17x21x16	17	21	16	14.3
17	IR17x21x20	17	21	20	18
17	IR17x22x13	17	22	13	14.9
17	IR17x22x14	17	22	14	16.4
17	IR17x22x16	17	22	16	18.7
17	IR17x22x23	17	22	23	27.1
17	IR17x24x20	17	24	20	33.6
20	IR20x24x16	20	24	16	16.5
20	IR20x24x20	20	24	20	21.3
20	IR20x25x12.5	20	25	12.5	16.3
20	IR20x25x16	20	25	16	21.1
20	IR20x25x16.5	20	25	16.5	21.7
20	IR20x25x17	20	25	17	22.4
20	IR20x25x18	20	25	18	24.3
20	IR20x25x20	20	25	20	27.5
20	IR20x25x30	20	25	30	40.9
20	IR20x28x20	20	28	20	45.2
22	IR22x26x16	22	26	16	17.5
22	IR22x26x20	22	26	20	23.2
22	IR22x28x17	22	28	17	29.8
22	IR22x28x20	22	28	20	35
22	IR22x28x30	22	28	30	26.7
25	IR25x29x20	25	29	20	25.5
25	IR25x29x30	25	29	30	39.3
25	IR25x30x16	25	30	16	26
25	IR25x30x17	25	30	17	27.5
25	IR25x30x18	25	30	18	29.8
25	IR25x30x20	25	30	20	32.6
25	IR25x30x30	25	30	30	50.1
25	IR25x30x32	25	30	32	53
25	IR25x32x22	25	32	22	51.7
28	IR28x32x17	28	32	17	24.5
28	IR28x32x20	28	32	20	28.4
28	IR28x32x30	28	32	30	43.8
29	IR29x32x13	29	32	13	14.8
30	IR30x35x13	30	35	13	25
30	IR30x35x16	30	35	16	30.8
30	IR30x35x17	30	35	17	32.3
30	IR30x35x18	30	35	18	35.3
30	IR30x35x20	30	35	20	40
30	IR30x35x26	30	35	26	50.3
30	IR30x35x30	30	35	30	58.9
30	IR30x37x18	30	37	18	50
30	IR30x37x22	30	37	22	60.8
30	IR30x38x20	30	38	20	64.8
32	IR32x37x20	32	37	20	42
32	IR32x37x30	32	37	30	62.7
32	IR32x40x20	32	40	20	68
32	IR32x40x36	32	40	36	124
33	IR33x37x13	33	37	13	21.9
34	IR34x42x20	34	42	20	0
35	IR35x40x17	35	40	17	38.3
35	IR35x40x20	35	40	20	44.4
35	IR35x40x30	35	40	30	67.9
35	IR35x42x20	35	42	20	63.9
35	IR35x42x20.5	35	42	20.5	66
35	IR35x42x21	35	42	21	67.7
35	IR35x42x23	35	42	23	74
35	IR35x42x36	35	43	36	117
35	IR35x43x22	35	43	22	82
38	IR38x43x20	38	43	20	48.1
38	IR38x43x30	38	45	30	73.6
40	IR40x45x17	40	45	17	42.5
40	IR40x45x20	40	45	20	50.5
40	IR40x45x22.5	40	47	22.5	0
40	IR40x45x30	40	48	30	77.1
40	IR40x48x22	40	48	22	92.3
40	IR40x48x23	40	48	23	97.3
40	IR40x48x40	40	50	40	170
40	IR40x50x20	40	50	20	106
40	IR40x50x22	40	45	22	118
42	IR42x47x20	42	47	20	53.5
42	IR42x47x30	42	50	30	81
45.2	IR45.2x58x36	45.2	58	36	0
45	IR45x50x20	45	50	20	0
45	IR45x50x25	45	50	25	71.1
45	IR45x50x26	45	50	26	0
45	IR45x50x35	45	50	35	101
45	IR45x50x40	45	50	40	0
45	IR45x52x22	45	52	22	89
45	IR45x52x23	45	52	23	93
45	IR45x52x40	45	52	40	164
45	IR45x55x20	45	55	20	117
45	IR45x55x22	45	55	22	130
47	IR47x60x35	47	60	35	0
50	IR50x55x20	50	55	20	62.6
50	IR50x55x25	50	55	25	77.8
50	IR50x55x35	50	55	35	112
50	IR50x58x22	50	58	22	115
50	IR50x58x23	50	58	23	119
50	IR50x58x40	50	58	40	209
50	IR50x60x20	50	60	20	129
50	IR50x60x25	50	60	25	163
50	IR50x60x28	50	60	28	183
55	IR55x60x25	55	60	25	86
55	IR55x60x35	55	60	35	121
55	IR55x63x25	55	63	25	141
55	IR55x63x45	55	63	45	256
55	IR55x65x28	55	65	28	198
5	IR5x8x12	5	8	12	2.79
5	IR5x8x16	5	8	16	3.75
60	IR60x65x41	60	65	42	0
60	IR60x68x25	60	68	25	152
60	IR60x68x35	60	68	35	213
60	IR60x68x45	60	68	45	275
60	IR60x70x25	60	70	25	195
60	IR60x70x28	60	70	28	216
65	IR65x72x25	65	72	25	142
65	IR65x72x45	65	72	45	259
65	IR65x73x25	65	73	25	164
65	IR65x73x35	65	73	35	232
65	IR65x75x28	65	75	28	230
6	IR6x10x10	6	10	10	3.7
6	IR6x10x12	6	10	12	4.6
6	IR6x9x12	6	9	12	3.17
6	IR6x9x16	6	9	16	4.3
70	IR70x80x25	70	80	25	224
70	IR70x80x30	70	80	30	267
70	IR70x80x35	70	80	35	313
70	IR70x80x54	70	80	54	487
70	IR70x80x56	70	80	56	506
75	IR75x85x25	75	85	25	238
75	IR75x85x30	75	85	30	287
75	IR75x85x35	75	85	35	336
75	IR75x85x54	75	85	54	520
7	IR7x10x12	7	10	12	3.61
7	IR7x10x16	7	10	16	4.9
80	IR80x90x25	80	90	25	254
80	IR80x90x30	80	90	30	304
80	IR80x90x35	80	90	35	355
80	IR80x90x54	80	90	54	550
85	IR85x100x35	85	100	35	580
85	IR85x100x63	85	100	63	1050
85	IR85x95x26	85	95	26	280
85	IR85x95x36	85	95	36	390
88	IR88x100x30	88	100	30	0
8	IR8x12x10	8	12	10	4.8
8	IR8x12x12	8	12	12	5.7
90	IR90x100x26	90	100	26	294
90	IR90x100x30	90	100	30	340
90	IR90x100x36	90	100	36	406
90	IR90x105x35	90	105	35	610
90	IR90x105x63	90	105	63	1110
95	IR95x105x26	95	105	26	313
95	IR95x105x36	95	105	36	430
95	IR95x110x35	95	110	35	643
95	IR95x110x63	95	110	63	1170
9	IR9x12x12	9	12	12	4.5
9	IR9x12x16	9	12	16	6.1
28.575	IRB1820	28.575	34.925	32	0
10	IR/LR10x13x12.5	10	13	12.5	5.2
12	IR/LR12x15x12.5	12	15	12.5	6.1
12	IR/LR12x15x16.5	12	15	16.5	8.1
12	IR/LR12x15x22.5	12	15	22.5	10.9
17	IR/LR17x20x16.5	17	20	16.5	11.1
17	IR/LR17x20x20.5	17	20	20.5	13.8
17	IR/LR17x20x30.5	17	20	30.5	20.6
20	IR/LR20x25x20.5	20	25	20.5	28.2
20	IR/LR20x25x26.5	20	25	26.5	36.1
20	IR/LR20x25x38.5	20	25	38.5	52.5
22	IR/LR22x28x20.5	22	28	20.5	36
25	IR/LR25x30x20.5	25	30	20.5	33.5
25	IR/LR25x30x26.5	25	30	26.5	43.3
25	IR/LR25x30x38.5	25	30	38.5	63.8
30	IR/LR30x35x20.5	30	35	20.5	40.7
35	IR/LR35x40x20.5	35	40	20.5	46.1
40	IR/LR40x45x20.5	40	45	20.5	52.5
45	IR/LR45x50x25.5	45	50	25.5	73.7
7	IR/LR7x10x10.5	7	10	10.5	3.09
8	IR/LR8x12x10.5	8	12	10.5	5
8	IR/LR8x12x12.5	8	12	12.5	5.9
15	LR15x18x12.5	15	18	12.5	7.2
25	LR25x30x12.5	25	30	12.5	20
25	LR25x30x16.5	25	30	16.5	26.7
30	LR30x35x12.5	30	35	12.5	23.3
30	LR30x35x16.5	30	35	16.5	31.4
35	LR35x40x12.5	35	40	12.5	27.2
35	LR35x40x16.5	35	40	16.5	37.4
40	LR40x45x16.5	40	45	16.5	41.4
45	LR45x50x20.5	45	50	20.5	58.8
50	LR50x55x20.5	50	55	20.5	64.1
14	R14x17x17	14	17	17	10

Advantages

IR/LR inner rings have the following advantages:

1. Facilitate mounting and dismounting: IR/LR inner rings are used as an intermediate component between the needle roller bearing and shaft. They can help facilitate mounting and dismounting of the bearing by providing a hardened and ground raceway on the shaft.

2. Increase load capacity: When used with needle roller bearings, IR/LR inner rings can increase the load capacity of the bearing by distributing the load more evenly over the shaft. This can also help reduce wear and extend the bearing’s lifespan.

3. Improve running accuracy: IR/LR inner rings can improve the running accuracy of the needle roller bearing by minimizing deviations in the roundness and cylindricity of the shaft. This can help ensure smoother operation and reduce vibration.

4. Allow for axial location: In some applications, IR/LR inner rings can be used to provide axial location of the bearing in the housing. This can help prevent axial movement of the bearing and improve the overall stability of the system.

5. Wide range of sizes and designs: IR/LR inner rings are available in a wide range of sizes and designs to fit various needle roller bearings and shafts. This allows for greater flexibility in designing and selecting the optimal bearing solution for a specific application.