The Ultimate Guide To Selecting Crossed Roller Bearings: THK Standard Cross Roller Bearings

There are 3 series of THK standard cross roller bearings, RA, RB and RU series, which are designed differently and have their own advantages and disadvantages, suitable for different working environments, if you have any questions, please feel free to contact our expert team.

1. THK Standard RB Series Cross Roller Bearings

Integral inner ring, split outer ring

The outer ring is divided into two pieces, the inner ring is a whole structure type, this series of cross roller bearings are suitable for applications with high rotational accuracy of the inner ring.

Bearing characteristics:
1. High precision: the precision can reach P5, P4, P2 level;
2. High rigidity: the series bearings are with preload;
3. High bearing capacity: can withstand axial load, radial load, tilting load.
4. Small volume: the bearings are small in size, which can save space for the host.

RB Series Cross Roller Bearing (52)

LKPB Models	inner ring	outer ring	width	Greasing hole	Chamfer	Shoulder height		Basic load rating（radial）		weight
	d	D	B B1	a-b	r(min)	ds	Dh	C	C0	Kg
(mm)	(mm)	(mm)	(mm)	a-b	r(min)	ds	Dh	kN	kN	Kg
RB2008	20	36	8	2-0.8	0.5	23.5	30.5	3.23	3.1	0.04
RB2508	25	41	8	2-0.8	0.5	28.5	35.5	3.63	3.83	0.05
RB3010	30	55	10	2.5-1	0.6	37	47	7.35	8.36	0.12
RB3510	35	60	10	2.5-1	0.6	41	51.5	7.64	9.12	0.13
RB4010	40	65	10	2.5-1	0.6	47.5	57.5	8.33	10.6	0.16
RB4510	45	70	10	2.5-1	0.6	51	61.5	8.62	11.3	0.17
RB5013	50	80	13	2.5-1.6	0.6	57.4	72	16.7	20.9	0.27
RB6013	60	90	13	2.5-1.6	0.6	68	82	18	24.3	0.3
RB7013	70	100	13	2.5-1.6	0.6	78	92	19.4	27.7	0.35
RB8016	80	120	16	3-1.6	0.6	91	111	30.1	42.1	0.7
RB9016	90	130	16	3-1.6	1	98	118	31.4	45.3	0.75
RB10016	100	140	16	3.5-1.6	1	109	129	31.7	48.6	0.83
RB10020	100	150	20	3.5-1.6	1	113	133	33.1	50.9	1.45
RB11012	110	135	12	2.5-1	1	117	127	12.5	24.1	0.4
RB11015	110	145	15	3.5-1.6	1.6	122	136	23.7	41.5	0.75
RB11020	110	160	20	3.5-1.6	1.6	120	143	34	54	1.56
RB12016	120	150	16	3.5-1.6	1.6	127	141	24.2	43.2	0.72
RB12025	120	180	25	3.5-2	2	133	164	66.9	100	2.62
RB13015	130	160	15	3.5-1.6	1.6	137	152	25	46.7	0.72
RB13025	130	190	25	3.5-2	2	143	174	69.5	107	2.82
RB14016	140	175	16	3.5-1.6	1.6	147	162	25.9	50.1	1
RB14025	140	200	25	3.5-2	2	154	185	74.8	121	2.96
RB15013	150	180	13	2.5-1.6	1.6	157	172	27	53.5	0.68
RB15025	150	210	25	3.5-2	2	164	194	76.8	128	3.16
RB15030	150	230	30	4.5-3	3	173	211	100	156	5.3
RB16025	160	220	25	3.5-2	2	173	204	81.7	135	3.14
RB17020	170	220	20	3.5-1.6	1.5	184	198	29	62.1	2.11
RB18025	180	240	25	3.5-2	1.5	195	225	84	143	3.44
RB19025	190	240	25	3.5-1.6	1	202	222	41.7	82.9	2.99
RB20025	200	260	25	3.5-2	2	215	245	84.2	157	4
RB20030	200	280	30	4.5-3	2	221	258	114	200	6.7
RB20035	200	295	35	5-3	2	225	270	151	252	9.6
RB22025	220	280	25	3.5-2	2	235	265	92.3	171	4.1
RB24025	240	300	25	3.5-2	2.5	256	281	68.3	145	4.5
RB25025	250	310	25	3.5-2	2.5	265	290	69.3	150	5
RB25030	250	330	30	4.5-3	2.5	269	306	126	244	8.1
RB25040	250	355	40	6-3.5	2.5	275	326	195	348	14.8
RB30025	300	360	25	3.5-2	2.5	315	340	76.3	178	5.9
RB30035	300	395	35	5-3	2.5	322	368	183	367	13.4
RB30040	300	405	40	6-3.5	2.5	326	377	212	409	17.2
RB35020	350	400	20	3.5-1.6	2.5	363	383	54.1	143	3.9
RB40035	400	480	35	5-3	2.5	422	459	156	370	14.5
RB40040	400	510	40	6-3.5	2.5	428	479	241	531	23.5
RB45025	450	500	25	3.5-1.6	1	464	484	61.7	182	6.6
RB50025	500	550	25	3.6-1.6	1	514	534	65.5	201	7.3
RB50040	500	600	40	6-3	2.5	526	572	239	607	26
RB50050	500	625	50	6-3.5	2.5	536	587	267	653	41.7
RB60040	600	700	40	6-3	3	627	673	264	721	29
RB70045	700	815	45	6-3	3	731	777	281	836	46
RB80070	800	950	70	6-4	4	836	900	468	1330	105
RB90070	900	1050	70	6-4	4	937	1001	494	1490	120
RB1000110	1000	1250	110	6-6	5	1057	1171	1220	3220	360
RB1250110	1250	1500	110	6-6	5	1308	1423	1350	3970	440

2. THK Standard RA Series Cross Roller Bearings

Split outer ring type with rotating inner ring

This series of bearings is a compact type that reduces the thickness of the inner and outer rings of RB series cross roller bearings to the limit.

They are suitable for parts requiring light weight and compact design, such as robot and manipulator rotating parts.

RA Series Cross Roller Bearing (16)

Shaft diameter	LKPB Models	Major dimensions						Shoulder dimensions		Basic load rating(radial)		Weight
		Inner diameter	Outer diameter	Width	Greasing hole		rmin			Basic load rating(radial)		Weight
		Inner diameter	Outer diameter	Width	Greasing hole		rmin			C	C0	Mass
		d	D	B B1	a	b		ds	Dh	kN	kN	kg
50	RA5008	50	66	8	2	0.8	0.5	53.5	60.5	5.1	7.19	0.08
60	RA6008	60	76	8	2	0.8	0.5	63.5	70.5	5.68	8.68	0.09
70	RA7008	70	86	8	2	0.8	0.5	73.5	80.5	5.98	9.8	0.1
80	RA8008	80	96	8	2	0.8	0.5	83.5	90.5	6.37	11.3	0.11
90	RA9008	90	106	8	2	0.8	0.5	93.5	100.5	6.76	12.4	0.12
100	RA 10008	100	116	8	2	0.8	0.5	103.5	110.5	7.15	13.9	0.14
110	RA11008	110	126	8	2	0.8	0.5	113.5	120.5	7.45	15	0.15
120	RA12008	120	136	8	2	0.8	0.5	123.5	130.5	7.84	16.5	0.17
130	RA13008	130	146	8	2	0.8	0.5	133.5	140.5	7.94	17.6	0.18
140	RA14008	140	156	8	2	0.8	0.5	143.5	150.5	8.33	19.1	0.19
150	RA15008	150	166	8	2	0.8	0.5	153.5	160.5	8.82	20.6	0.2
160	RA16013	160	186	13	2.5	1.6	0.8	165	179	23.3	44.9	0.59
170	RA17013	170	196	13	2.5	1.6	0.8	175	189	23.5	46.5	0.64
180	RA18013	180	206	13	2.5	1.6	0.8	185	199	24.5	49.8	0.68
190	RA19013	190	216	13	2.5	1.6	0.8	195	209	24.9	51.5	0.69
200	RA20013	200	226	13	2.5	1.6	0.8	205	219	25.8	54.7	0.71

3. THK Standard RU Series Cross Roller Bearings

Inner and outer ring integral type

This series of cross roller bearings eliminates the need for flanges and support seats because the mounting holes are already machined.

In addition, because of the integrated inner ring structure with a seat, there is almost no effect on performance during mounting, so stable rotational accuracy and torque can be obtained. They can be used in applications where both the outer and inner rings rotate.

RU Series Cross Roller Bearing (11)

Diameter (mm)	LKPB Models	Main dimensions						Shoulder height		Basic load rating（radial）		Weight
		ID	OD	PCD	B	Oil hole	rmin
		d	D	dp	β	d1		ds	Dh	C/kN	Co/kN	kg
10	RU28	10	52	28	8		0.3	24	29.5	2.9	24	0.12
20	RU42	20	70	41.5	12	3.1	0.6	37	47	7.35	8.35	0.29
35	RU66	35	95	66	15	3.1	0.6	59	74	17.5	22.3	0.62
55	RU85	55	120	85	15	3.1	0.6	79	93	20.3	29.5	1
80	RU124(G)	80	165	124	22	3.1	1	114	134	33.1	50.9	2.6
	RU124X
90	RU148(G)	90	210	147.5	25	3.1	1.5	133	162	49.1	76.8	4.9
	RU148X
115	RU178(G)	115	240	178	28	3.1	1.5	161	195	80.3	135	6.8
	RU178X
160	RU228(G)	160	295	227.5	35	6	2	208	246	104	172	11.4
	RU228X
210	RU297(G)	210	380	297.3	40	6	2.5	272	320	156	281	21.3
	RU297X
350	RU445(G)	350	540	445.4	45	6	2.5	417	473	222	473	35.4
	RU445X

For other precision crossed roller bearings, please check our product center.

For expert guidance in meeting your specific requirements, reach out to our knowledgeable team. Experience firsthand how our precision solutions can elevate your machinery’s efficiency and durability. Contact us today!

LKPB With more than 10 years of production experience

Supporting OEM service; 50 days return service; 7*24 hours technical support; Accept non-standard customization; Maximum 24 months product warranty

FAQ

What is LKPB?

Luoyang LIKE Precision Machinery Co., Ltd – LKPB，Located in Luoyang, which is a bearing manufacturing base in China, we are an enterprise focusing on the research, development and manufacture of precision bearings, mainly producing precision crossed roller bearings and rotary table bearings and various non-standard bearings with precision class of P5, P4 , P2 and VSP.

Are your products reliable?

LKPB® strictly follows the ISO9001 quality system requirements for product quality control, relying on the professional technology of the bearing production base, the product quality is stable and cost-effective,

LKPB®, turning the world, carrying unlimited! We have served thousands of customers all over the world during the ten years of our establishment.

Our future goal is to become the most professional manufacturer of rotary table bearings and crossed roller bearings in China, and make LKPB® a world-class bearing brand.

This is our vision and direction！

Do you have export experience?

LKPB® has accumulated rich production experience in the past 10 years, supporting OEM service. Our products are exported to Germany, Italy, Korea, Japan, the United States, Belgium, Turkey and so on.

Contact information for LKPB?

Tel: 0086-379 63123369
WhatsApp/Wechat: 86 15670310586
Email: info@lkpbearing.com

What types of bearings do you mainly produce?

Top quality: Rotary Table Bearing ( YRT, YRTS, YRTM, ZKLDF series) ; Crossed Roller Bearing ( RA/RAU, RB, RU, RE, SX, XU, XSU, XR/JXR, CRB/CRBC, CRBH, CRBF, CRBS, CRBT series); Thin Section Bearings ( KAA, KA, KB, KC, KD, KF, KG, JHA, JA, JB, JG, JU series); Harmonic Reducer Bearings ( CSF, SHF series); Angular Contact Ball Bearing ( 718, 719, 70, 72 series); Hollow Rotary Platform Bearings ( ZK series); and Flexible Bearings ( F series, 3E series).

Does it support OEM?

Yes, We have experience working in this area

What are the application areas of bearings?

The main application areas of our products are precision rotary tables, machining center rotary tables, industrial robot joints and rotating, robotic rotating parts, CNC machine tools, automation industry, direct drive motors, precision instruments, radar, medical equipment and other industries.

How long does the order cycle take?

Regular models are in stock, reasonable prices, ready for delivery, non-standard precision bearings according to the requirements of the drawings and the number of 1-3 weeks delivery time

Please let us know the model and quantity of the product you need and we will get back to you as soon as possible!

Blog

The Ultimate Guide to Selecting Crossed Roller Bearings: THK Standard Cross Roller Bearings