RB Separable Outer Ring Type Precision Crossed Roller Bearings

RB-Separable Outer Ring Type (THK RB Series Standard Type Cross Roller Bearing)

Standard Type Crossed Roller Bearings RB series

LYNBC Standard Type Crossed Roller Bearings RB series are full complement type without cage, adopting separable outer ring and integrally designed inner ring, which is suitable to where high rotational accuracy of the inner ring and heavy load are required. Model RB is also subject to be separable outer ring type for inner ring rotation. Model RB featured by no seal, seal attached on both ends and seal attached on either end . Otherwise CRB series include two types: CRB (open type , full complement) and CRB···UU (two sides sealed type, full complement).

LYNBC Crossed Roller Bearings RB series (THK corresponding to RB series, IKO corresponding to CRB series), NSK corresponding to NRXT series).Cross-roller bearing basic type, the dimension of inner ring and outer ring are minimum limited. With a separable outer ring which fixed together by bolt or special rivet, the inner ring is integrated. It is used in locations where the rotational accuracy of the inner ring is required. For example, the swivel portions of index tables of machine tools.

▲ The design’s of all these Crossed Roller Bearings RB series are based on standard structures; LYNBC can design and manufacture many other similar structures in accordance to the special and particular requirements of their customers’. If our customer’s have specific requests then the customer should identify the structure, and mounting dimensions that are required. Please contact the LYNBC Technical Center if you need any assistance in this area.

Shaft diameter	Model No.	Main dimensions							Shoulder height		Basic load rating (radial)		Mass (kg)
		Inner diamete d	Outer diameter D	Roller pitch circle diameter dp	Width B B₁	Greasing hole		r^min	ds (max)	Dh (min)	C( kN)	C⁰( kN)
		Inner diamete d	Outer diameter D	Roller pitch circle diameter dp	Width B B₁	a	b	r^min	ds (max)	Dh (min)	C( kN)	C⁰( kN)
20	RB 2008	20	36	27	8	2	0.8	0.5	23.5	30.5	3.23	3.1	0.04
25	RB 2508	25	41	32	8	2	0.8	0.5	28.5	35.5	3.63	3.83	0.05
30	RB 3010	30	55	41.5	10	2.5	1	0.6	37	47	7.35	8.36	0.12
35	RB 3510	35	60	46.5	10	2.5	1	0.6	41	51.5	7.64	9.12	0.13
40	RB 4010	40	65	51.5	10	2.5	1	0.6	46.5	57.5	8.33	10.6	0.16
45	RB 4510	45	70	56.5	10	2.5	1	0.6	51	61.5	8.62	11.3	0.17
50	RB 5013	50	80	64	13	2.5	1.6	0.6	57	72	16.7	20.9	0.27
60	RB 6013	60	90	74	13	2.5	1.6	0.6	67	82	18	24.3	0.3
70	RB 7013	70	100	84	13	2.5	1.6	0.6	77	92	19.4	27.7	0.35
80	RB 8016	80	120	98	16	3	1.6	0.6	88	110	30.1	42.1	0.7
90	RB 9016	90	130	108	16	3	1.6	1	98	118	31.4	45.3	0.75
100	RB 10016	100	140	119.3	16	3.5	1.6	1	109	129	31.7	48.6	0.83
100	RB 10020	100	150	123	20	3.5	1.6	1	113	133	33.1	50.9	1.45
110	RB 11012	110	135	121.8	12	3.5	1	0.6	117	128	12.5	24.1	0.4
	RB 11015		145	126.5	15	3.5	1.6	0.6	119	136	23.7	41.5	0.75
	RB 11020		160	133	20	3.5	1.6	1	120	143	34	54	1.56
120	RB 12016	120	150	134.2	16	3.5	1.6	0.6	127	141	24.2	43.2	0.72
120	RB 12025	120	180	148.7	25	3.5	2	1.5	133	164	66.9	100	2.62
130	RB 13015	130	160	144.5	15	3.5	1.6	0.6	137	152	25	46.7	0.72
130	RB 13025	130	190	158	25	3.5	2	1.5	143	174	69.5	107	2.82
140	RB 14016	140	175	154.8	16	2.5	1.6	1	147	162	25.9	50.1	1
140	RB 14025	140	200	168	25	3.5	2	1.5	154	185	74.8	121	2.96
150	RB 15013	150	180	164	13	2.5	1.6	0.6	157	172	27	53.5	0.68
	RB 15025		210	178	25	3.5	2	1.5	164	194	76.8	128	3.16
	RB 15030		230	188	30	4.5	3	1.5	169	211	100	156	5.3
160	RB 16025	160	220	188.6	25	3.5	2	1.5	173	204	81.7	135	3.14
170	RB 17020	170	220	191	20	3.5	1.6	1.5	184	198	29	62.1	2.21
180	RB 18025	180	240	210	25	3.5	2	1.5	195	225	84	143	3.44
190	RB 19025	190	240	211.9	25	3.5	1.6	1	202	222	41.7	82.9	2.99
200	RB 20025	200	260	230	25	3.5	2	2	215	245	84.2	157	4
	RB 20030		280	240	30	4.5	3	2	221	258	114	200	6.7
	RB 20035		295	247.7	35	5	3	2	225	270	151	252	9.6
220	RB 22025	220	280	250.1	25	3.5	2	2	235	265	92.3	171	4.1
240	RB 24025	240	300	269	25	3.5	2	2.5	256	281	68.3	145	4.5
250	RB 25025	250	310	277.5	25	3.5	2	2.5	265	290	69.3	150	5
	RB 25030		330	287.5	30	4.5	3	2.5	269	306	126	244	8.1
	RB 25040		355	300.7	40	6	3.5	2.5	275	326	195	384	14.8
300	RB 30025	300	360	328	25	3.5	2	2.5	315	340	76.3	178	5.9
	RB 30035		395	345	35	5	3	2.5	322	368	183	367	13.4
	RB 30040		405	351.6	40	6	3.5	2.5	326	377	212	409	17.2
350	RB 35020	350	400	373.4	20	3.5	1.6	2.5	363	383	54.1	143	3.9
400	RB 40035	400	480	440.3	35	5	3	2.5	422	459	156	370	14.5
400	RB 40040	400	510	453.4	40	6	3.5	2.5	428	479	241	531	23.5
450	RB 45025	450	500	474	25	3.5	1.6	1	464	484	61.7	182	6.6
500	RB 50025	500	550	524.2	25	3.5	1.6	1	514	534	65.5	201	7.3
	RB 50040		600	548.8	40	6	3	2.5	526	572	239	607	26
	RB 50050		625	561.6	50	6	3.5	2.5	536	587	267	653	41.7
600	RB 60040	600	700	650	40	6	3	3	627	673	264	721	29
700	RB 70045	700	815	753.5	45	6	3	3	731	777	281	836	46
800	RB 80070	800	950	868.1	70	6	4	4	836	900	468	1330	105
900	RB 90070	900	1050	969	70	6	4	4	937	1001	494	1490	120
1000	RB 1000110	1000	1250	1114	110	6	6	5	1057	1171	1220	3220	360
1250	RB 1250110	1250	1500	1365.8	110	6	6	5	1308	1423	1350	3970	440

THK RB Series Standard Type Cross Roller Bearing

The thk rb series represents THK's standard offering in the cross roller bearing product line. It's a widely used and trusted solution, known for its reliability and performance.

Key Features and Benefits of the THK RB Series

High Rigidity: The crossed roller arrangement ensures excellent rigidity, minimizing deformation under load. This is vital for precision equipment.

High Rotational Accuracy: Precision grinding and manufacturing processes result in smooth rotation and precise positioning. Suitable for applications requiring high accuracy.

Compact Design: Compared to traditional multi-bearing setups, the RB Series offers a more compact and efficient solution, saving space in your application.

Load Capacity in All Directions: Effectively handles radial loads, axial loads, and moment loads simultaneously, simplifying design and reducing component count.

Easy Installation: The RB Series is generally easier to install compared to more complex bearing arrangements. Mounting holes are pre-drilled for convenient integration.

Cost-Effective: Provides a balance of performance and value, making it a popular choice for a wide range of applications.

Standard Type: A widely available and frequently used series. This means easier sourcing and shorter lead times compared to more specialized bearings.

Preload: The RB series can be supplied with a preload. A preloaded bearing eliminates clearance and increases rigidity, ensuring smooth and precise operation. Specifying the correct preload is crucial for optimal performance.

Lubrication: Usually require lubrication. Proper lubrication is crucial for long life and smooth operation. Consult the THK documentation for recommended lubricants.

Typical Applications of the THK RB Series

The RB Series is a versatile bearing suitable for numerous applications requiring high precision, rigidity, and load capacity. Common examples include:

Robotics: Robot joints, rotary tables, and other moving parts where precision and load capacity are paramount.

Machine Tools: Rotary tables, spindles, and other critical components in machine tools.

Medical Equipment: CT scanners, X-ray machines, and other medical devices requiring precise motion and reliability.

Semiconductor Manufacturing Equipment: Wafer handling systems, inspection equipment, and other high-precision applications.

Inspection Equipment: Coordinate Measuring Machines (CMMs), optical inspection systems, and other metrology equipment.

Radar Systems: Antenna positioning and rotation.

Aerospace Equipment: Actuators and other critical components.

Index Tables and Rotary Tables: Providing precise and rigid rotary motion.

Important Considerations When Selecting a THK RB Series Bearing

Load Requirements: Determine the maximum radial load, axial load, and moment load the bearing will experience. Refer to the THK catalog for load rating information.

Speed Requirements: Consider the operating speed of the application. High speeds can affect bearing life and lubrication requirements.

Accuracy Requirements: Specify the required rotational accuracy and runout.

Operating Environment: Consider the operating temperature, presence of contaminants, and other environmental factors.

Mounting Space: Ensure that the bearing size and mounting configuration are compatible with the available space.

Preload: Select the appropriate preload level based on the application requirements.

Lubrication: Choose the correct lubricant and lubrication method based on the operating conditions. Consult THK guidelines.

Lifespan: Estimate the required bearing lifespan based on the application's duty cycle.