Metric Thin Section Four-Point Contact Ball Bearings | X-Type 8mm, 8mm Sealed, 13mm, 20mm Series

Metric Thin Section Four-Point Contact Ball Bearings, also known as X-Type thin section ball bearings, are designed with a special four-point contact raceway structure. This design allows one bearing to support radial loads, axial loads in both directions, and moment loads within a compact cross section. Compared with A-Type angular contact thin section bearings and C-Type radial contact thin section bearings, X-Type four-point contact ball bearings provide more flexible multi-direction load capacity. They are suitable for compact precision equipment where limited installation space, low weight, smooth rotation, and combined load support are required. Luoyang Deeplink Technology Co.,Ltd. manufactures LYDL PX series metric thin section four-point contact ball bearings for industrial robots, precision rotary tables, medical equipment, optical systems, semiconductor machinery, aerospace mechanisms, automation equipment, camera gimbals, radar systems, and compact motion control assemblies.

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Metric Thin Section Four-Point Contact Ball Bearings | X-Type 8mm, 8mm Sealed, 13mm, 20mm Series

Product Overview

X-Type metric thin section four-point contact ball bearings are designed for applications requiring compact structure and multi-direction load support. The four-point contact raceway allows the bearing to carry axial loads from both directions, radial loads, and moment loads, making it suitable for rotary mechanisms where a single compact bearing is preferred. The LYDL PX series includes 8mm open type, 8mm sealed type, 13mm series, and 20mm series. Each series provides different load capacity, rigidity, sealing protection, and installation advantages, allowing engineers to select the most suitable bearing according to working space, load direction, speed, environmental condition, and precision requirement.

Main Structure Features

• X-Type four-point contact design: Supports radial load, axial load in both directions, and moment load within one bearing.
• Thin section structure: Helps reduce equipment weight and save radial installation space.
• Compact bearing design: Suitable for precision equipment with limited mounting space.
• Multi-direction load capacity: More versatile than A-Type or C-Type bearings in applications with complex load directions.
• Smooth rotation: Precision raceway geometry helps reduce friction and improve running stability.
• Open and sealed options: 8mm open type and 8mm sealed type are available for different working environments.
• Multiple cross-section options: 8mm, 13mm, and 20mm series can match different load and rigidity requirements.
• Equivalent model reference: LYDL PX series can be used as replacement references for selected KAYDON K-Series and J-Series XP0 metric thin section four-point contact ball bearings.
• Customization available: Precision grade, preload, clearance, lubrication, sealing, marking, packaging, and special application requirements can be customized.

Difference Between 8mm, 8mm Sealed, 13mm and 20mm Series

Series	Structure Feature	Load & Rigidity Level	Recommended Application
8mm Open Series	Ultra-thin open structure	Lightweight and space-saving	Optical equipment, compact instruments, robot end-effectors, lightweight automation
8mm Sealed Series	8mm thin section with sealing protection	Lightweight with better dust protection	Medical devices, automation systems, instruments, cleaner rotary assemblies
13mm Series	Balanced cross-section design	Medium load capacity and better rigidity	Precision machinery, rotary mechanisms, semiconductor equipment, medical equipment
20mm Series	Stronger cross section and higher rigidity	Higher load capacity and stronger moment support	Industrial robots, rotary platforms, aerospace mechanisms, heavy-duty precision assemblies

Metric Thin Section Four-Point Contact Ball Bearings Structural Features – 8mm Open Series

Metric Thin Section Four-Point Contact Ball Bearings Structural Features The 8mm open X-Type series is designed for ultra-compact applications requiring low weight, thin cross section, smooth rotation, and multi-direction load support. This series is suitable for equipment with limited radial space while still requiring radial load, axial load in both directions, and moment load capacity. It is commonly used in optical instruments, compact automation equipment, lightweight rotary mechanisms, medical devices, and robot end-effectors.

LYDL Type	Inner Diameter d (mm)	Outer Diameter D (mm)	Weight (kg)	Radial Static Co (kg)	Radial Dynamic Cr (kg)	Axial Static Co (kg)	Axial Dynamic Cr (kg)	Moment Static (N·m)	Moment Dynamic (N·m)	KAYDON Equivalent
PX2508	25	41	0.06	334	331	758	469	49	40	K02508XP0
PX5008	50	66	0.08	555	460	1389	666	158	98	K05008XP0
PX6008	60	76	0.09	656	506	1641	745	219	127	K06008XP0
PX7008	70	86	0.10	757	549	1894	819	290	158	K07008XP0
PX8008	80	96	0.11	859	591	2146	890	370	191	K08008XP0
PX9008	90	106	0.13	959	631	2399	959	461	228	K09008XP0
PX10008	100	116	0.14	1060	670	2651	1025	562	266	K10008XP0
PX11008	110	126	0.15	1162	707	2903	1090	672	307	K11008XP0
PX12008	120	136	0.16	1262	743	3156	1152	792	350	K12008XP0
PX13008	130	146	0.18	1363	778	3156	1212	923	395	K13008XP0
PX14008	140	156	0.19	1465	812	3661	1271	1063	442	K14008XP0
PX15008	150	166	0.20	1565	846	3914	1329	1213	492	K15008XP0
PX16008	160	176	0.20	1666	878	4166	1386	1373	543	K16008XP0
PX17008	170	186	0.20	1767	910	4418	1441	1543	596	K17008XP0
PX18008	180	196	0.21	1868	941	4671	1495	1722	651	K18008XP0
PX19008	190	206	0.21	1944	963	4860	1536	1888	701	K19008XP0
PX20008	200	216	0.22	2045	992	5113	1588	2086	759	K20008XP0
PX25008	250	266	0.28	2550	1133	6375	1840	3226	1075	K25008XP0
PX30008	300	316	0.35	3055	1261	7638	2076	4614	1429	K30008XP0
PX32008	320	336	0.39	3257	1310	8143	2166	5238	1580	K32008XP0
PX34008	340	356	0.42	3459	1350	8648	2255	5859	1728	K34008XP0
PX36008	360	376	0.46	3636	1396	9089	2330	6561	1890	K36008XP0

Metric Thin Section Four-Point Contact Ball Bearings Structural Features – 8mm Sealed Series

Metric Thin Section Four-Point Contact Ball Bearings Structural Features The 8mm sealed X-Type series is based on the compact four-point contact structure and includes sealing protection for applications where dust, particles, or light contamination may affect bearing performance. Compared with the open type, the sealed type provides better protection and improved grease retention, making it suitable for medical devices, automation equipment, measuring instruments, and compact rotary systems requiring cleaner operation.

LYDL Type	Inner Diameter d (mm)	Outer Diameter D (mm)	Weight (kg)	Radial Static Co (kg)	Radial Dynamic Cr (kg)	Axial Static Co (kg)	Axial Dynamic Cr (kg)	Moment Static (N·m)	Moment Dynamic (N·m)	Limiting Speed (RPM)	Ultimate Torque (N·m)	KAYDON Equivalent
PX2508UU	25	41	0.06	334	331	758	469	49	40	3000	0.02	J02508XP0
PX5008UU	50	66	0.08	555	460	1389	666	158	98	1500	0.04	J05008XP0
PX6008UU	60	76	0.09	656	506	1641	745	219	127	1270	0.05	J06008XP0
PX7008UU	70	86	0.10	757	549	1894	819	290	158	1090	0.07	J07008XP0
PX8008UU	80	96	0.11	859	591	2146	890	370	191	950	0.09	J08008XP0
PX9008UU	90	106	0.13	959	631	2399	959	461	228	700	0.12	J09008XP0
PX10008UU	100	116	0.14	1060	670	2651	1025	562	266	630	0.15	J10008XP0
PX11008UU	110	126	0.15	1162	707	2903	1090	672	307	580	0.18	J11008XP0
PX12008UU	120	136	0.16	1262	743	3156	1152	792	350	530	0.22	J12008XP0
PX13008UU	130	146	0.18	1363	778	3156	1212	923	395	490	0.26	J13008XP0
PX14008UU	140	156	0.19	1465	812	3661	1271	1063	442	450	0.30	J14008XP0
PX15008UU	150	166	0.20	1565	846	3914	1329	1213	492	420	0.35	J15008XP0
PX16008UU	160	176	0.20	1666	878	4166	1386	1373	543	400	0.40	J16008XP0
PX17008UU	170	186	0.20	1767	910	4418	1441	1543	596	370	0.46	J17008XP0

Metric Thin Section Four-Point Contact Ball Bearings Structural Features – 13mm Series

Metric Thin Section Four-Point Contact Ball Bearings Structural Features The 13mm X-Type series provides a balanced solution between compact design, load capacity, rigidity, and moment load support. Compared with the 8mm series, the 13mm series offers higher load ratings and stronger stiffness while still maintaining the space-saving advantages of thin section bearings. It is suitable for precision automation equipment, semiconductor machinery, medical equipment, measuring instruments, rotary mechanisms, and compact mechanical systems requiring reliable multi-direction load support.

LYDL Type	Inner Diameter d (mm)	Outer Diameter D (mm)	Weight (kg)	Radial Static Co (kg)	Radial Dynamic Cr (kg)	Axial Static Co (kg)	Axial Dynamic Cr (kg)	Moment Static (N·m)	Moment Dynamic (N·m)	KAYDON Equivalent
PX2513	25	51	0.13	696	689	1293	869	96	96	K02513XP0
PX5013	50	76	0.20	919	910	2263	1226	280	211	K05013XP0
PX6013	60	86	0.23	1099	1014	2747	1436	393	272	K06013XP0
PX7013	70	96	0.26	1228	1074	3070	1547	500	328	K07013XP0
PX8013	80	106	0.28	1358	1133	3393	1653	619	388	K08013XP0
PX9013	90	116	0.31	1551	1224	3878	1808	784	464	K09013XP0
PX10013	100	126	0.34	1681	1279	4201	1906	931	532	K10013XP0
PX11013	110	136	0.37	1875	1364	4686	2050	1131	617	K11013XP0
PX12013	120	146	0.40	2006	1415	5010	2144	1307	693	K12013XP0
PX13013	130	156	0.43	2133	1466	5333	2235	1496	771	K13013XP0
PX14013	140	166	0.46	2327	1544	5817	2368	1746	869	K14013XP0
PX15013	150	176	0.48	2456	1592	6141	2455	1963	954	K15013XP0
PX16013	160	186	0.51	2586	1639	6464	2541	2193	1043	K16013XP0
PX17013	170	196	0.54	2780	1711	6949	2666	2494	1152	K17013XP0
PX18013	180	206	0.57	2909	1756	7272	2748	2753	1247	K18013XP0
PX19013	190	216	0.60	3038	1800	7595	2829	3024	1344	K19013XP0
PX20013	200	226	0.63	3232	1868	8080	2948	3375	1464	K20013XP0
PX25013	250	276	0.77	4008	2119	10019	3403	5168	2050	K25013XP0
PX30013	300	326	0.91	4719	2327	11796	3794	7242	2680	K30013XP0
PX32013	320	346	0.97	5042	2419	12605	3966	8232	2963	K32013XP0
PX34013	340	366	1.02	5365	2508	13412	4133	9286	3257	K34013XP0
PX36013	360	386	1.08	5688	2594	14220	4298	10403	3560	K36013XP0

Metric Thin Section Four-Point Contact Ball Bearings Structural Features – 20mm Series

Metric Thin Section Four-Point Contact Ball Bearings Structural Features The 20mm X-Type series is designed for applications requiring higher rigidity, stronger load capacity, and improved moment load support. Compared with the 8mm and 13mm series, the 20mm series provides a stronger cross section and better stiffness. It is recommended for industrial robots, precision rotary platforms, aerospace mechanisms, radar systems, heavy-duty automation, and compact equipment where a single bearing must support radial load, axial load, and moment load at the same time.

LYDL Type	Inner Diameter d (mm)	Outer Diameter D (mm)	Weight (kg)	Radial Static Co (kg)	Radial Dynamic Cr (kg)	Axial Static Co (kg)	Axial Dynamic Cr (kg)	Moment Static (N·m)	Moment Dynamic (N·m)	KAYDON Equivalent
PX2520	25	65	0.34	1518	1503	2545	1789	225	225	K02520XP0
PX5020	50	90	0.52	1845	1827	3999	2418	549	470	K05020XP0
PX6020	60	100	0.59	1906	1887	4363	2562	685	556	K06020XP0
PX7020	70	110	0.66	2071	2050	5090	2839	899	679	K07020XP0
PX8020	80	120	0.73	2181	2111	5454	2973	1070	777	K08020XP0
PX9020	90	130	0.80	2473	2263	6181	3231	1334	916	K09020XP0
PX10020	100	140	0.87	2618	2323	6545	3357	1540	1026	K10020XP0
PX11020	110	150	0.94	2909	2466	7272	3601	1854	1179	K11020XP0
PX12020	120	160	1.01	3200	2603	7999	3837	2196	1341	K12020XP0
PX13020	130	170	1.07	3345	2660	8363	3953	2460	1468	K13020XP0
PX14020	140	180	1.15	3636	2791	9090	4179	2852	1643	K14020XP0
PX15020	150	190	1.22	3781	2845	9453	4290	3152	1779	K15020XP0
PX16020	160	200	1.30	4072	2970	10180	4507	3594	1967	K16020XP0
PX17020	170	210	1.37	4363	3023	10907	4719	3929	2113	K17020XP0
PX18020	180	220	1.44	4508	3143	11271	4823	4421	2312	K18020XP0
PX19020	190	230	1.51	4800	3260	11999	5029	4942	2519	K19020XP0
PX20020	200	240	1.57	4945	3309	12362	5130	5334	2678	K20020XP0
PX25020	250	290	2.10	6108	3731	15271	5906	8087	3706	K25020XP0
PX30020	300	340	2.30	7272	4119	18179	6633	11410	4849	K30020XP0
PX32020	320	360	2.44	7708	4255	19270	6897	12850	5323	K32020XP0
PX34020	340	380	2.58	8144	4388	20361	7154	14376	5812	K34020XP0
PX36020	360	400	2.73	8581	4518	21452	7408	15988	6316	K36020XP0

Applications

LYDL Metric Thin Section Four-Point Contact Ball Bearings are widely used in precision equipment where compact size, low weight, smooth rotation, and multi-direction load support are required. Typical applications include:

• Industrial robot joints and robot end-effectors
• Precision rotary tables and indexing mechanisms
• Medical imaging equipment and surgical devices
• Optical inspection systems and measuring instruments
• Semiconductor manufacturing equipment
• Aerospace and defense mechanisms
• Camera gimbals and compact rotary assemblies
• Radar systems and precision tracking devices
• Packaging machinery and automation systems
• Lightweight mechanical transmission systems
• Compact turntable and swing mechanisms

Selection Guide

Choose the 8mm Open Series when the design requires the lightest structure and smallest radial section. It is suitable for compact instruments, optical equipment, lightweight automation, and robot end tools. Choose the 8mm Sealed Series when the equipment requires a compact bearing with better dust protection and grease retention. It is suitable for medical devices, measuring instruments, automation equipment, and cleaner rotary assemblies. Choose the 13mm Series when the equipment requires a balanced solution between compact size, load capacity, rigidity, and moment load support. It is suitable for most precision automation, semiconductor equipment, medical equipment, and rotary transmission applications. Choose the 20mm Series when higher load capacity and stronger rigidity are required. It is suitable for industrial robots, aerospace mechanisms, heavier rotary structures, precision rotary platforms, and equipment with higher stiffness requirements.

X-Type vs A-Type vs C-Type Thin Section Bearings

Type	Bearing Structure	Load Direction	Recommended Use
X-Type Four-Point Contact	Four-point contact raceway design	Radial load + axial load in both directions + moment load	Compact rotary systems requiring multi-direction load support
A-Type Angular Contact	Angular contact raceway design	Radial load + one-direction axial load	Applications requiring axial stiffness and combined load support in one direction
C-Type Radial Contact	Radial contact raceway design	Mainly radial load and light axial load	General rotary applications and low axial load mechanisms

Why Choose LYDL Metric Thin Section Four-Point Contact Ball Bearings?

Luoyang Deeplink Technology Co.,Ltd. focuses on precision bearing manufacturing and customized bearing solutions. LYDL can provide metric thin section four-point contact ball bearings for customers who need compact structure, stable rotation, equivalent model replacement, and reliable technical support. Our advantages include:

• Wide metric thin section bearing model range
• 8mm, 8mm sealed, 13mm, and 20mm cross-section options
• Equivalent replacement support for selected international models
• Custom precision, preload, clearance, lubrication, sealing, marking, and packaging
• Technical support for model selection and application matching
• Suitable for robot, medical, semiconductor, aerospace, optical, and precision automation applications

Manufacturing and Customization

LYDL can provide metric thin section four-point contact ball bearings with customized precision grade, clearance, preload, lubrication, sealing, surface treatment, marking, and packaging. For special applications, customers may provide drawings, working conditions, load requirements, speed, installation dimensions, accuracy grade, and equivalent model numbers for selection support. Available customization options include:

• Precision grade selection
• Customized preload and clearance
• Grease or oil lubrication options
• Open type or sealed type options
• Low-noise and low-friction performance requirements
• Special marking and private label packaging
• Equivalent replacement for selected international bearing models
• Drawing-based non-standard bearing production
• Sample supply and batch production support

FAQ

What is a Metric Thin Section Four-Point Contact Ball Bearing?

A Metric Thin Section Four-Point Contact Ball Bearing is a precision X-Type thin section ball bearing with four-point contact raceway geometry. It can support radial load, axial load in both directions, and moment load within a compact structure.

What does X-Type mean in thin section bearings?

X-Type refers to four-point contact thin section ball bearings. This structure is suitable for compact rotary systems requiring multi-direction load support.

What is the difference between open type and sealed type?

The open type is suitable for clean environments and applications requiring lower friction. The sealed type provides better dust protection and grease retention, making it suitable for equipment exposed to particles or light contamination.

What is the difference between 8mm, 13mm and 20mm series?

The 8mm series is thinner and lighter, the 13mm series provides a balanced design between compact size and load capacity, and the 20mm series offers higher rigidity and stronger moment load performance.

Can LYDL provide bearings equivalent to KAYDON K-Series and J-Series XP0 models?

Yes. The PX series listed above includes equivalent references to selected KAYDON K-Series and J-Series XP0 models for cross-reference and replacement selection. These equivalent model references help customers compare dimensions and select suitable replacement bearings.

How should I choose the right X-Type thin section bearing?

Please provide the required bore diameter, outer diameter, installation space, radial load, axial load, moment load, speed, accuracy requirement, sealing requirement, and working environment. LYDL can help recommend a suitable X-Type, A-Type, or C-Type thin section bearing solution.

Can the bearings be customized?

Yes. LYDL can customize precision grade, clearance, preload, lubrication, sealing, marking, packaging, and special technical requirements according to customer drawings and application conditions.

Contact LYDL

For Metric Thin Section Four-Point Contact Ball Bearings, X-Type thin section bearings, KAYDON equivalent thin section bearing replacement, or customized precision bearing solutions, please contact Luoyang Deeplink Technology Co.,Ltd. for technical selection support, drawings, quotation, and sample availability. Sales Manager: Galen Email: sales@luoyangdeeplink.com Phone / WhatsApp / WeChat: +86-18037003779 Address: No.6, Gang ‘a Road, Yiyang County, Luoyang City, Henan Province Company: Luoyang Deeplink Technology Co.,Ltd. Website: www.lydl-bearing.com