RB Series

Features of RB Series

The RB series model is the basic type of crossed cylindrical roller bearings. The size of the inner and outer rings are miniaturized to a small limit. Its structure is that the outer ring is a split type and the inner ring is a body design, which is suitable for parts that require high rotation accuracy of the inner ring.

Applications

The scope of application is wide. Our products survive by quality, develop by reputation, and win the market by service.

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Parameter Quality Standard

Parameter

Bearing Type	Dimension					Shoulder Height				Weight
	Inner Ring	Outer Ring	Roller Pitch Diameter	Height	Chamfer			Basic Load Rating
	Inner Ring	Outer Ring	Roller Pitch Diameter	Height	Chamfer			Cr	Cor
	d	D	Dpw	B B1	rmin	ds	Dh	kN	Kn	KG
RB2008	20	36	27	8	0.5	23.5	30.5	3.23	3.1	0.04
RB2508	25	41	32	8	0.5	28.5	35.5	3.63	3.83	0.05
RB3010	30	55	41.5	10	0.6	37	47	7.35	8.36	0.12
RB3510	35	60	46.5	10	0.6	41	51.5	7.64	9.12	0.13
RB4010	40	65	51.5	10	0.6	47.5	57.5	8.33	10.6	0.16
RB4510	45	70	56.5	10	0.6	51	61.5	8.62	11.3	0.17
RB5013	50	80	64	13	0.6	57.4	72	16.7	20.9	0.27
RB6013	60	90	74	13	0.6	68	82	18	24.3	0.3
RB7013	70	100	84	13	0.6	78	92	19.4	27.7	0.35
RB8016	80	120	98	16	0.6	91	111	30.1	42.1	0.7
RB9016	90	130	108	16	1	98	118	31.4	45.3	0.75
RB10016	100	140	119.3	16	1	109	129	31.7	48.6	0.83
RB10020	100	150	123	20	1	113	133	33.1	50.9	1.45
RB11012	110	135	121.8	12	0.6	117	127	12.5	24.1	0.4
RB11015	110	145	126.5	15	0.6	122	136	23.7	41.5	0.75
RB11020	110	160	133	20	1	120	143	34	54	1.56
RB12016	120	150	134.2	16	0.6	127	141	24.2	43.2	0.72
RB12025	120	180	148.7	25	1.5	133	164	66.9	100	2.62
RB13015	130	160	144.5	15	0.6	137	152	25	46.7	0.72
RB13025	130	190	158	25	1.5	143	174	69.5	107	2.82
RB14016	140	175	160	16	1	147	162	25.9	50.1	1
RB14025	140	200	172	25	1.5	154	185	74.8	121	2.96
RB15013	150	180	166	13	0.6	157	172	27	53.5	0.68
RB15025	150	210	182	25	1.5	164	194	76.8	128	3.16
RB15030	150	230	192	30	1.5	173	211	100	156	5.3
RB16025	160	220	192	25	1.5	173	204	81.7	135	3.14
RB17020	170	220	196.1	20	1.5	184	198	29	62.1	2.21
RB18025	180	240	210	25	1.5	195	225	84	143	3.44
RB19025	190	240	219	25	1	202	222	41.7	82.9	2.99
RB20025	200	260	230	25	2	215	245	84.2	157	4
RB20030	200	280	240	30	2	221	258	114	200	6.7
RB20035	200	295	247.7	35	2	225	270	151	252	9.6
RB22025	220	280	250.1	25	2	235	265	92.3	171	4.1
RB24025	240	300	272.5	25	2.5	256	281	68.3	145	4.5
RB25025	250	310	280.9	25	2.5	265	290	69.3	150	5
RB25030	250	330	287.5	30	2.5	269	306	126	244	8.1
RB25040	250	355	300.7	40	2.5	275	326	195	348	14.8
RB30025	300	360	332	25	2.5	315	340	76.3	178	5.9
RB30035	300	395	345	35	2.5	322	368	183	367	13.4
RB30040	300	405	351.6	40	2.5	326	377	212	409	17.2
RB35020	350	400	376.6	20	2.5	363	383	54.1	143	3.9
RB40035	400	480	440.3	35	2.5	422	459	156	370	14.5
RB40040	400	510	453.4	40	2.5	428	479	241	531	23.5
RB45025	450	500	476.6	25	1	464	484	61.7	182	6.6
RB50025	500	550	526.6	25	1	514	534	65.5	201	7.3
RB50040	500	600	548.8	40	2.5	526	572	239	607	26
RB50050	500	625	561.6	50	2.5	536	587	267	653	41.7
RB60040	600	700	650	40	3	627	673	264	721	29
RB70045	700	815	753.5	45	3	731	777	281	836	46
RB80070	800	950	868.1	70	4	836	900	468	1330	105
RB90070	900	1050	969	70	4	937	1001	494	1490	120
RB1000110	1000	1250	1114	110	5	1057	1171	1220	3220	360
RB1250100	1250	1500	1365.8	110	5	1308	1423	1350	3970	440

Quality Standard

Rockewell Bearings has added parameters that are not defined by ISO/ABEC for customers, including preload tolerances, functional tests, traceability and micron codes, cleanliness, raceway curvature, balls, etc. and roundness, surface processing (function And non-functional surfaces), steel specifications, cage trim and design, and installation chamfering. The definition of these parameters improves the quality of precision angular contact ball bearing products, thereby improving the performance of machine tool spindles.
The element of precision angular contact ball bearings is the cage, which is very important for machine tool bearings. The performance of the cage will affect the stability of machine tool bearings under high-speed rotation. The standard cage produced by Rockewell is made of phenolic resin. The internal design and the tolerance of the pocket gap are tight and the guide surface is controlled to ensure the stability of the cage during high-speed operation, lubrication and dynamic load.
The two elements of precision angular contact ball bearings are cleanliness, which is very important for precision angular contact ball bearings. Generally, the parts of the bearing products must be cleaned with a multi-solvent for 3 hours to prevent impurities from entering the bearing and prevent inherent pollution sources. In addition, the non-working surface of the bearing must be ground to ensure that the bearing is free of impurities before leaving the factory. Therefore, the bearing products produced by Rockewell can increase the normal operating time of the machine tool.
There are two main structural design methods for precision angular contact ball bearings: the high-rigidity WI series and the high-speed HX series to meet the requirements of different applications. The basic, open Rockewell bearing design has a higher spindle speed and greater dynamic radial stiffness, so the spindle can cut more material in a shorter time while ensuring excellent finished product tolerances. These improvements are attributed to the combination of the ball body and the precision engineering design of the raceway profile, which improves the processing rate.

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