Spherical Plain Bearings With Graphite

Spherical plain bearings are a type of bearing designed to handle multidirectional loads, with both radial and axial components, while providing smooth, low-friction motion. They are commonly used in applications where misalignment, oscillating, or recurring tilting motions are present.

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Plain Journal Bearing

Bearing Selection

A wide range of bearing types and sizes are available to help you select the right bearing for your application.

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Bearing Maintenance

Bearing maintenance is important to keep bearings running properly in a variety of applications. Our Self-lubricating bearings are oil-free & maintenance-free

Self Lubricating Bushings

Bearing Performance

Our high performance bearings are designed and manufactured to meet a range of stringent requirements to ensure they remain efficient at high speeds, high loads and high precision.

Precision Oilless Bearing

Types Of Spherical Plain Bearings

There are three primary types of spherical plain bearings: radial, angular contact, and thrust bearings. Each type has its own unique design and application benefits.

Cast Bronze Thrust Washer

Radial spherical plain bearings are designed to handle primarily radial loads and can accommodate angular misalignments. They are composed of an inner and outer ring, with a spherical sliding surface between them. Radial spherical plain bearings are widely used in applications with oscillating movements, as they provide low friction and smooth motion.

Radial Spherical Plain Bearings

Angular contact spherical plain bearings are designed to handle combined loads, with both radial and axial components. They have a split inner ring and a single-piece outer ring. These bearings are used when a higher load-carrying capacity is required, as they can handle higher axial loads compared to radial spherical plain bearings.

Angular Contact Spherical Plain Bearings

Thrust spherical plain bearings are specifically designed to handle axial loads. They consist of two flat raceways, with a spherical sliding surface in between. These bearings are used in applications where high axial loads or axial misalignment is present.

Thrust Spherical Plain Bearings

Plain Spherical Bearing With Graphite – VIIPLUS

It can rotate and swing at any angle when moving. The VIIPLUS graphite spherical bearing can greatly save time and reduce the difficulty of assembly.

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Tilt Angle
The inclination angle of the spherical plain bearing is much larger than that of the general adjustable rolling bearing, and it is very suitable for use in the supporting parts with low concentricity requirements. The inclination angle of the spherical plain bearing varies with the size, type, sealing device and support form of the bearing structure
Cooperate
In any case, the selected fit of the spherical plain bearing shall not cause uneven deformation of the ring, and the selection of its fit and grade must be determined according to the working conditions such as bearing type, support form and load size.
Loading And Unloading
The assembly and disassembly of spherical plain bearings should follow the following principles, that is, the force exerted by assembly and disassembly cannot be transmitted directly through the spherical sliding surface. In addition, auxiliary loading and unloading tools, such as sleeves, disassemblers, etc., should be used to directly and uniformly apply the loading and unloading force exerted by the outside to the matching ferrule, or use auxiliary methods such as heating for unloaded loading and unloading.

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Spherical Plain Bearing CuZn25Al5 with White PTFE Plugs

CuZn25Al5, or copper-aluminum alloy, plays a crucial role in enhancing the bearing’s durability and strength. This alloy is known for its excellent corrosion resistance, making it ideal for bearings used in harsh environments.

The Benefit of White PTFE Plugs

PTFE (Polytetrafluoroethylene), popularly known as Teflon, is a high-performance plastic with excellent properties such as low friction, high heat resistance, and chemical inertness. The white PTFE plugs in these bearings provide an added layer of protection, reducing friction and enhancing the overall performance of the bearing.

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Materials Used in Spherical Plain Bearings

Spherical plain bearings can be made of various materials, depending on the specific application requirements. The most common materials include steel-on-steel, steel-on-PTFE, and steel-on-bronze.

Steel-on-steel bearings are made of hardened steel, with both the inner and outer rings featuring a steel sliding surface. These bearings are highly durable and can handle high loads. However, they require regular lubrication to minimize friction and wear.
Steel-on-PTFE bearings have a steel inner ring and a PTFE (polytetrafluoroethylene) composite material on the sliding surface of the outer ring. They are suitable for applications where lubrication is difficult or undesirable.
Steel-on-bronze bearings consist of a steel inner ring and a bronze outer ring. suitable for applications with low to moderate loads and speeds. They are often used in applications where corrosion resistance is important

HIGH-QUALITY graphite spherical plain bearing

Advantages Of Spherical Plain Bearings

Spherical plain bearings offer several advantages compared to other types of bearings:

They can accommodate misalignment, oscillating, and tilting motions, making them ideal for applications with complex load conditions.
a wide range of materials, sizes, and designs, allowing for customization based on specific application requirements.
low friction and smooth motion, ensuring efficient and reliable performance.
easy to install and maintain, often requiring minimal maintenance, especially in the case of maintenance-free bearings.

Characteristics Of Graphite Spherical Bearing

Maintenance-free features quite long service life.
Conforms to ISO Standard E type bearings. High precision.
The inner surface of the inner ring is subject to sliding. The outer surface of the outer ring bear self-aligning.
Suitable for higher load than other self-lubricating Spherical Plain Bearings.
Applicable to large oscillating angles in circumferential oscillating motion.
Customized design can be made on your requirement.

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Oilless Spherical Plain Bearings, Self-Lubricated

Viiplus Spherical Plain Bearings incorporate high-quality copper alloy-based metals with engineered solid lubricant plugs. which can rotate or swing in any direction.
Precise tolerances utilizing strategic plug location and plug compounds ensure performance delivery and lubrication-free service. This bearing style is available in standard inch, metric, and made-to-order sizes.

Material Structure

Stainless Steel, C45 Steel, Or Gcr15 Outer Ring.

Spherical Plain Bearing Inter Ring(CuZn25Al5, CuAl10Ni, CuSn12).

The benefits of oilless bronze bearings

Maintenance-Free Radial Graphite Spherical Bearing | Applications

Oilless graphite spherical bearings are used in a variety of industries and applications, including engineering hydraulic cylinders, forging machine tools, engineering machinery, automation equipment, automotive shock absorbers, water conservancy machinery, and other industries.

In the aerospace industry, spherical plain bearings are used in flight control systems, landing gear assemblies, and other critical components where high precision and reliability are essential.
Automotive applications for spherical plain bearings include suspension systems, steering linkages, and gearshift linkages. These bearings help improve vehicle performance, handling, and ride comfort.
Heavy machinery, such as construction equipment, mining machinery, and agricultural equipment, often utilize spherical plain bearings in joints and pivots.

Spherical Plain Bearing Unleashing Maximum Performance!

Steel Outer W/ Copper Alloy Inner – Metric Series

Most plain spherical bearings have adopted special processing methods, such as surface phosphating, galvanizing, chrome plating or outer sliding surface lining, padding, spraying, etc., so they have greater load capacity and impact resistance, and have corrosion resistance, Wear-resistant, self-aligning, well lubricated or self-lubricating without contamination by lubricating dirt

Steel spherical bearing

When the sliding surface material of self-lubricating spherical plain bearings is steel, the permissible operating temperature depends on the permissible operating temperature of the lubricant.

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Selection Of Bronze Plain Spherical Bearings

When selecting a Bronze Plain Spherical Bearings, the load size, direction, and transmission method of the spherical plain bearing, the movement mode of the spherical plain bearing, the working conditions, the lubrication method, the positioning (radial, axial), the required service life, installation, and disassembly, etc. should be fully considered. Require.

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Plain Spherical Bearings Size Chart

Standard No.	d(H7)	D1(h6)	B	C	D	b	Alignment Angle (α)	Allowable Radial Load (kN)	Allowable Thrust Load (kN)
Spherical Bearings-015	15	26	12	9	22	4	8	6.5	0.5
Spherical Bearings-020	20	32	16	14	28	4	4	12.6	1.4
Spherical Bearings-025	25	42	21	18	36	4	5	21.8	2.5
Spherical Bearings-030	30	50	27	23	44	4	6	32	3.5
Spherical Bearings-035	35	55	30	26	49	4	5	43.7	4.8
Spherical Bearings-040	40	62	33	28	55	4	6	54.7	5.7
Spherical Bearings-045	45	72	36	31	62	4	5	69.7	7.2
Spherical Bearings-050	50	80	42	36	70	4	5	92.4	10
Spherical Bearings-060	60	100	53	45	90	4	6	143	16
Spherical Bearings-070	70	110	58	50	99	4	5	181	20
Spherical Bearings-080	80	130	70	60	115	4	6	254	30
Spherical Bearings-090	90	140	76	65	125	4	6	313	36
Spherical Bearings-100	100	160	88	75	145	6	6	544	64
Spherical Bearings-110	110	170	93	80	155	6	5	642	73
Spherical Bearings-120	120	190	105	90	170	6	6	797	94
Spherical Bearings-130	130	200	110	95	180	6	5	880	105
Spherical Bearings-140	140	210	90	70	180	6	7	668	56
Spherical Bearings-150	150	220	120	105	200	6	5	1135	129
Spherical Bearings-160	160	230	105	80	200	6	8	891	73
Spherical Bearings-180	180	260	105	80	225	6	6	1002	74
Spherical Bearings-200	200	290	130	100	250	6	7	1434	117
Spherical Bearings-220	220	320	135	100	275	6	8	1577	118
Spherical Bearings-240	240	340	140	100	300	9	8	1720	118
Spherical Bearings-260	260	370	150	110	325	9	7	2075	143
Spherical Bearings-280	280	400	155	120	350	9	6	2455	172
Spherical Bearings-300	300	430	165	120	375	9	7	2630	172