Cross Cylindrical Roller Slewing Bearing(XSA/XSI/XSU Series)

Cross Cylindrical Roller Slewing Bearing(XSA/XSI/XSU Series) (XSA and XA Series)

INA crossed roller bearing series XSA14 and XA（External Gear Teeth Type）

INA cross roller slewing bearings series XSA 14 or XA are units comprising inner and outer rings with a closing plug and securing dowel, rolling elements, spacers, sealed on both sides, lubricated with a high quality grease, can be relubricated via lubrication nipples and are particularly easy to fit. The bearing rings have the through holes or threaded holes for fixing screws.The bearing rings are supplied without gear teeth, in order to achieve simple drive solutions, are available with external or internal gear teeth. INA crossed roller bearings are designed as these preloaded slewing rings can support higher loads than four point contact bearings. They have proved themselves particularly where bearings are subjected to high radial forces and moderate axial and tilting moment loads. Crossed roller slewing bearings are suitable for applications with uniform free from stick-slip, low rotational resistance and high requirements for axial and radial runout accuracy and rigidity, for example in robots, handling systems and machine tools.

▲ The design’s of all these slewing bearing 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.

Designation	No. ¹⁾	Dimensions										Fixing holes					Gear Data				Tooth force		Basic load ratings				Mass (kg)
		D_a	d_i²⁾	d_iZT	D_i²⁾	D_iZT	d_a	H	h	T	t	L_a	L_i	n_a³⁾	n_i³⁾	d_B	do	m	z	b	F_{z norm} (kN)	F_{z max} (kN)	axial		radial
		D_a	d_i²⁾	d_iZT	D_i²⁾	D_iZT	d_a	H	h	T	t	L_a	L_i	n_a³⁾	n_i³⁾	d_B	do	m	z	b	F_{z norm} (kN)	F_{z max} (kN)	C_a (kN)	C_oa (kN)	C_r (kN)	C_0r (kN)
XA 12 0235N	①	318.8	171	173	236_±0_.₂	238	234_±0_.₂	40	35	2.6	6	275	195	12	12	13	312	4	78	35	11	16.1	135	235	86	115	13.3
XA 20 0352H⁵⁾	②³⁾	462	274	-	353	-	351	59	54	-	-	407	298	24	24	14	450	6	75	30	20.9	34.5	335	720	214	335	34.5
XSA 14 0414N	①	503.3	344	-	417	-	413_–0_.₅	56	-	-	-	455	368	20	24	-	495	5	99	-	15.9	23.6	229	520	146	250	32
XSA 14 0544N	②	640.3	474	-	547	-	543_–0_.₅	56	-	-	-	585	498	28	32	-	630	6	105	-	21.3	31.5	270	680	170	330	44
XSA 14 0644N	③	742.3	574	-	647	-	643_–0_.₆	56	-	-	-	685	598	32	36	-	732	6	122	-	21.3	31.5	290	800	185	395	52
XSA 14 0744N	④	838.1	674	-	747	-	743_–0_.₆	56	-	-	-	785	698	36	40	-	828	6	138	-	21.3	31.5	315	930	200	455	59
XSA 14 0844N	⑤	950.1	774	-	847	-	843_–0_.₆	56	-	-	-	885	798	36	40	-	936	8	117	-	28.3	42	340	1050	215	510	71
XSA 14 0944N	⑥	1046.1	874	-	947	-	943_–0_.₇	56	-	-	-	985	898	40	44	-	1032	8	129	-	28.3	42	360	1170	227	580	77
XSA 14 1094N	⑦	1198.1	1024	-	1097	-	1093_–0_.₇	56	-	-	-	1135	1048	44	47	-	1184	8	148	-	28.3	42	390	1360	246	670	91

Cross Cylindrical Roller Slewing Bearing(XSA/XSI/XSU Series) (XI and XSI)

INA crossed roller bearing Series XSI14 and XI （Internal Gear Teeth Type）

INA cross roller slewing bearings are sealed on both sides, lubricated with a high quality grease, can be relubricated via lubrication nipples and are particularly easy to fit. The bearing rings are supplied without gear teeth, in order to achieve simple drive solutions, are available with external or internal gear teeth. INA crossed roller bearings are designed as these preloaded slewing rings can support higher loads than four point contact bearings. They have proved themselves particularly where bearings are subjected to high radial forces and moderate axial and tilting moment loads. Crossed roller slewing bearings are suitable for applications with uniform free from stick-slip, low rotational resistance and high requirements for axial and radial runout accuracy and rigidity, for example in robots, handling systems and machine tools.

Designation	No. ¹⁾	Dimension											Fixing holes					Gear Data				Tooth force		Basic load ratings				Mass (kg)
		D_a	D_a_ZT²⁾	d_i	D_i	d_a	d_a_ZT	H	h	T	t	u	L_a	L_i	n_a³⁾	n_i³⁾	d_B	do	m	z	b	F_{z norm} (kN)	F_{z max} (kN)	axial		radial
		D_a	D_a_ZT²⁾	d_i	D_i	d_a	d_a_ZT	H	h	T	t	u	L_a	L_i	n_a³⁾	n_i³⁾	d_B	do	m	z	b	F_{z norm} (kN)	F_{z max} (kN)	C_a (kN)	C_oa (kN)	C_r (kN)	C_0r (kN)
XI 12 0288N	③	340	338	216	289	287	238	38	33	5	2.5	6	324	252	20	20	9	224	4	56	34	12.3	17.8	150	290	95	141	12
XSI 14 0414N	①	484	-	325	415₊₀_.₅	411	-	56		-	-	-	460	375	24	24	-	335	5	67	-	17.7	26.2	229	520	146	250	31
XSI 14 0544N	②	614	-	444	545₊₀_.₅	541	-	56	-	-	-	-	590	505	32	32	-	456	6	76	-	23.7	35	270	680	170	330	43
XSI 14 0644N	③	714	-	546	645₊₀_.₆	641	-	56	-	-	-	-	690	605	36	36	-	558	6	93	-	23.7	35	290	800	185	395	50
XSI 14 0744N	④	814	-	648	745₊₀_.₆	741	-	56	-	-	-	-	790	705	40	40	-	660	6	110	-	23.7	35	315	930	200	455	58
XSI 14 0844N	⑤	914	-	736	845₊₀_.₆	841	-	56	-	-	-	-	890	805	40	40	-	752	8	94	-	31.4	46.7	340	1050	215	510	69
XSI 14 0944N	⑥	1014	-	840	945₊₀_.₇	941	-	56	-	-	-	-	990	905	44	44	-	856	8	107	-	31.4	46.7	360	1170	227	580	76
XSI 14 1094N	⑦	1164	-	984	1095₊₀_.₇	1091	-	56	-	-	-	-	1140	1055	48	48	-	1000	8	125	-	31.4	46.7	390	1360	246	670	91

Cross Cylindrical Roller Slewing Bearing(XSA/XSI/XSU Series) (XU and XSU Series)

INA Crossed Roller Bearing Series XSU and XU （Without Gear Teeth Type）

LYNBC would have produced crossed roller bearing Series XSU and XU with without gear teeth professionally. And it could support high radial loads and moderate axial loads and tilting moment loads, and also be suitable for supported and suspended loads. Crossed roller bearing series XSU and XU have contact seals on both sides that protect the raceway system against dust, contamination moisture. It also has cylindrical rollers to DIN 5402, spacers made from plastic and lubrication nipple on the circumference of the outer ring.

▲ The design’s of all these crossed roller bearing series XSU and XU 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.

Designation	No. ¹⁾	Dimension											Fixing holes					Gear Data				Tooth force		Basic load ratings				Mass (kg)
		D_a	D_a_ZT²⁾	d_i	D_i	d_a	d_i_ZT	H	h	T	t	u	L_a	L_i	n_a³⁾	n_i³⁾	d_B	ds	t_s	z	b	F_{z norm} (kN)	F_{z max} (kN)	axial		radial
		D_a	D_a_ZT²⁾	d_i	D_i	d_a	d_i_ZT	H	h	T	t	u	L_a	L_i	n_a³⁾	n_i³⁾	d_B	ds	t_s	z	b	F_{z norm} (kN)	F_{z max} (kN)	C_a (kN)	C_oa (kN)	C_r (kN)	C_0r (kN)
XSU 14 0414	①	484	-	344	415^+0.5	413_–0.5	-	-	-	-	-	-	460	368	24	24	-	-	-	-	-			229	520	146	250	28
XSU 14 0544	②	614	-	474	545^+0.5	543_–0.5	-	-	-	-	-	-	590	498	32	32	-	-	-	-	-			270	680	170	330	38
XSU 14 0644	③	714	-	574	645^+0.⁶	643_–0.₆	-	-	-	-	-	-	690	598	36	36	-	-	-	-	-			290	800	185	395	44
XSU 14 0744	④	814	-	674	745^+0.⁶	743_–0.₆	-	-	-	-	-	-	790	698	40	40	-	-	-	-	-			315	930	200	455	52
XSU 14 0844	⑤	914	-	774	845^+0.⁶	843_–0.₆	-	-	-	-	-	-	890	798	40	40	-	-	-	-	-			340	1050	215	510	60
XSU 14 0944	⑥	1014	-	874	945^+0.⁷	943_–0.₇	-	-	-	-	-	-	990	898	44	44	-	-	-	-	-			360	1170	227	580	67
XSU 14 1094	⑦	1164	-	1024	1095^+0.⁷	1093_–0.₇	-	-	-	-	-	-	1140	1048	48	48	-	-	-	-	-			390	1360	246	670	77
XU 05 0077⁵⁾	①	112	-	40	77.5	74	-	22	21	-	-	-	97	56	6	6	6.6	11	5.5	-	-			22.4	29	14.3	14.2	1.4
XU 06 0094⁵⁾	②	140	-	57	94.6	93.4	-	26	25	-	-	-	120	70	6	6	9	15	6	-	-			32.5	37.5	20.7	18.4	2.4
XU 06 0111⁵⁾	③	145.79	-	76.2	111.8	-	-	15.87	--	-	-	-	133.1	88.9	8	8	6.9	11	6.35	-	-			36	44.5	22.8	21.5	1.2
XU 08 0120⁵⁾	④	170	-	69	120.6	119.4	-	30	--	-	-	-	148	90	6	6	9	15	9	-	-			56	53	35.5	26	4
XU 08 0149⁵⁾	⑤	196.85	-	101.6	149.6	-	-	22.22	22.22	-	-	-	177.8	115.8	16	16	6.9	11	6.35	-	-			63	66	40	32.5	3.6
XU 12 0179	⑥	234	232	124.5	180±0.2	178±0.2	126.5	35	30	5	5	6	214	144.5	12	12	11	-	-	-	-			118	179	75	88	7
XU 12 0222	⑦	300	-	140	224	220	-	36	30	-	-	-	270	170	12	12	18	-	-			-	-	133	275	85	131	12
XU 16 0260	⑧	329	327	191	261	259	193	46	41	7	7	3.5	305	215	20	20	14	-	-	-	-	-	-	212	350	135	173	16
XU 08 0264⁵⁾	⑨	311	-	215.9	264.6	263.4	-	25.4	25.4	-	-	-	295.3	231.8	12	12	8.7	13.7	8.6	-	-	-	-	85	117	54	57	6.9
XU 16 0405	⑩	474	472	336	406	404	338	46	41	7	7	3.5	450	360	30	30	14	-	-	-	-	-	-	270	550	172	270	25
XU 08 0430⁵⁾	⑪	480	-	380	430.6	429.4	-	26	26	-	-	-	462	398	20	20	9	15	9	-	-	-	-	110	280	70	138	12
XU 30 0515	⑫	646	644	384	516	514	386	86	79	12	12	-	598	432	18	18	26	-	-	-	-	-	-	720	1370	455	670	115

INA Series Crossed Roller Slewing Bearings Introduction

Cross cylindrical roller slewing bearing(XSA/XSI/XSU series) are a type of rolling-element bearing designed to handle high loads and moments in applications requiring precise rotation. They are commonly used in robotics, machine tools, medical equipment, and other industrial applications. Here's a detailed breakdown of their features, benefits, and considerations:

Key Features and Design

Crossed Roller Design: The rollers are arranged in alternating directions, typically at a 45-degree angle, inside the bearing rings. This unique arrangement provides excellent load capacity in all directions (radial, axial, and moment). The crossing angles contribute to stiffness and stability.

Integrated Inner and Outer Rings: These bearings typically consist of two inner and two outer rings. These rings are often split to simplify installation and adjustment.

Cage or Spacer: A cage or spacer separates the rollers and ensures even spacing and prevents contact between rollers. Common materials include brass, resin, or machined cages depending on the application requirements (speed, temperature, load).

Preload: These bearings are usually preloaded. Preload eliminates clearance within the bearing, further enhancing stiffness and accuracy. Preload is achieved by either:

Compression of the rollers: The rollers are slightly oversized compared to the raceway.

Axial preload: Tightening the bearing to a specific torque creates axial pressure on the rollers.

Materials: Typically made from high-quality bearing steel (e.g., SAE 52100 or equivalent), which is hardened and ground for durability and precision.

Benefits

High Load Capacity: Excellent at handling combined radial, axial, and moment loads simultaneously. This is a key advantage over other bearing types in applications experiencing complex load patterns.

High Stiffness: The crossed roller design and preload result in exceptional stiffness, reducing deflection and maintaining accurate positioning. This is crucial for applications demanding high precision and minimal vibration.

High Accuracy: Precisely manufactured components and preload minimize runout and ensure smooth, accurate rotation.

Compact Design: Compared to using multiple single-row bearings to handle similar loads, crossed roller bearings can provide a more compact and efficient solution.

Low Starting Torque: Despite the preload, they can be designed for relatively low starting torque, which is important for some applications.

Easy Installation (in some cases): The split ring design allows for easier installation and adjustment, especially in confined spaces.

Long Service Life: With proper lubrication and maintenance, these bearings offer a long service life.

Applications

Robotics: Robot arms, joints, and turntables benefit from the high load capacity, stiffness, and accuracy.

Machine Tools: Rotary tables, indexing heads, and spindle supports. Essential for achieving high precision machining.

Medical Equipment: CT scanners, MRI machines, and surgical robots require smooth, precise, and reliable rotation.

Semiconductor Manufacturing Equipment: Wafer handling robots and other high-precision equipment.

Aerospace: Gimbals, radar systems, and other rotating components.

Industrial Automation: Indexing tables, conveyors, and other automated equipment.

Wind Turbines: Pitch and yaw control systems.

Considerations

Cost: Crossed roller slewing bearings are generally more expensive than other types of bearings due to their complex design and manufacturing requirements.

Sensitivity to Contamination: Like all precision bearings, they are sensitive to contamination. Proper sealing and lubrication are essential.

Mounting: Proper mounting is crucial to ensure the bearing's performance and longevity. The mounting surfaces must be flat, rigid, and accurately aligned. Incorrect mounting can lead to premature failure.

Lubrication: Regular lubrication with the correct type of grease or oil is essential. The frequency and type of lubrication will depend on the application and operating conditions.

Preload Adjustment: While often pre-set, some crossed roller bearings allow for preload adjustment. This requires careful attention to the manufacturer's specifications and the use of appropriate tools.

Speed Limitations: They have speed limitations compared to some other bearing types. The maximum speed depends on the bearing size, load, and lubrication.

INA Series Specific Information

Variety of Types: INA (now part of Schaeffler) offers a comprehensive range of crossed roller slewing bearings, available in various sizes and configurations to meet specific application requirements.

Types Offered: INA offers several series of crossed roller bearings. The specific series will determine the load capacity, stiffness, and other performance characteristics. Some common series include:

XSU: A commonly used series with split inner and outer rings.

RAX: Another frequently used series with good load capacity.

YRT: Rotary table bearings with integrated measuring systems in some models.

Customization: INA can provide customized crossed roller bearings to meet specific application requirements, such as special materials, coatings, or preload settings.

Technical Support: INA/Schaeffler provides comprehensive technical support and engineering services to help customers select the appropriate bearing and optimize its performance. Consult their catalogs and engineers for specific series information and application guidance.

How to Select an INA Crossed Roller Slewing Bearing

Determine Load Requirements: Calculate the radial, axial, and moment loads that the bearing will experience. Consider static and dynamic loads, as well as shock loads.

Determine Speed and Accuracy Requirements: Determine the required rotational speed and the required positioning accuracy.

Consider Environmental Conditions: Take into account the operating temperature, humidity, and potential exposure to contaminants.

Review INA's Catalog: Consult the INA crossed roller bearing catalog to find bearings that meet your load, speed, accuracy, and environmental requirements.

Consult with INA Engineers: Contact INA engineers for assistance in selecting the optimal bearing for your application. They can provide valuable insights and recommendations based on their expertise.

Consider Mounting Requirements: Plan the mounting carefully, considering the required flatness, rigidity, and alignment.

Choose Appropriate Lubrication: Select the appropriate type of grease or oil based on the operating conditions and the bearing manufacturer's recommendations.