Single Row Spherical Roller Bearings

Single Row Spherical Roller Bearings

Single row spherical roller bearings (also called “Barrel Bearings”) have solid outer rings with a concave raceway, solid inner rings with two ribs, and a cylindrical or tapered bore, as well as barrel rollers with cages. They have only a low axial load-carrying capacity. Single row spherical roller bearings are particularly suitable where high radial shock type loads occur, and misalignments must be compensated; see the section on the compensation of angular misalignments.

Single Row Spherical Roller Bearings Specification

Boundary dimensions (mm)			Load ratings (KN)		Limiting speeds (r/min)		Mass (kg)	Bearing NO.
d	D	B	Cr	Cor	Grease	oil		HZPT
20	47	14	20.4	19.3	-	7500	0.114	20204-TVP
30	62	16	27.5	28.5	-	5600	0.207	20206-TVP
20	52	15	27	24.5	-	7000	0.152	20304-TVP
25	52	15	24	25	-	6700	0.132	20205-K-TVP-C3
25	52	15	24	25	-	6700	0.134	20205-TVP
25	62	17	36	34.5	-	6000	0.243	20305-TVP
30	62	16	27.5	28.5	-	5600	0.203	20206-K-TVP-C3
30	72	19	49	49	-	5000	0.37	20306-TVP
35	72	17	40.5	43	-	4800	0.296	20207-K-TVP-C3
35	72	17	40.5	43	-	4800	0.301	20207-TVP
35	80	21	58.5	61	-	4500	0.493	20307-TVP
40	80	18	49	53	-	4300	0.38	20208-K-TVP-C3
40	80	18	49	53	-	4300	0.386	20208-TVP
40	90	23	76.5	81.5	-	4000	0.671	20308-TVP
45	85	19	52	57	-	4000	0.433	20209-K-TVP-C3
45	85	19	52	57	-	4000	0.441	20209-TVP
45	100	25	86.5	95	-	3600	0.914	20309-TVP
50	90	20	58.5	68	-	3600	0.489	20210-K-TVP-C3
50	90	20	58.5	68	-	3600	0.499	20210-TVP
50	110	27	108	118	-	3400	1.17	20310-TVP

Features of Single Row Spherical Roller Bearings:

Single row spherical roller bearings with solid brass cages have the suffix MB. The suffix TVP indicates solid window cages made from glass fiber reinforced polyamide. The cages are guided on the inner ring.

Following Are the Advantages of Using spherical Roller Bearings:

• These bearings can operate with misalignment.
• They are the best bearing to handle an amount of very high radial loads.
• Can moves the load in both axial and radial directions.
• Do not require such maintenance services.
• The structure is suitable to carry a high load capacity.
• Reduce the amount of friction and improve the working efficiency of the machines.

Spherical Roller Bearings Material

These Bearings are manufactured with several kind of material based on the application and working environment. Chrome steel is one of the most popular materials used in production of these Bearings because of its durability yet sheet steel, polyamide and brass are also used for some applications. One of the most important parts of Spherical Bearings is the cage that holds bearings at their place. That cage is usually manufactured with pressed steel or brass because both of these materials offer strength as well as temperature resistance.

These Bearings tend to have seals in order to prevent contaminants like dirt, liquid, debris as well as harsh temperature. This type of these bearing doesn’t even need lubrication if they do not exceed 50% of their maximum allowed RPM.

How do Spherical Roller Bearings Work?

All spherical roller bearings have the same working principle. They all have outer rings that with concave (spherical) inner raceways. The inner rings similarly have convex outer raceways (or rolling elements that create a matching convex sliding surface). What separates the various types of spherical bearings is the design of their sliding surface. Some are ring-to-ring (such as spherical plain bearings and rod ends), others use rolling elements such as balls or rollers between the inner and outer rings.

Types of Spherical Roller Bearings

Single Row Spherical Roller Bearing	Double Row Spherical Roller Bearing
Single row spherical roller bearings can accommodate both radial and axial loads in both directions. Single row spherical bearings use a single row roller, which provides a variety of benefits for higher load capacities operations. Single row spherical roller bearings are more flexible to allow for misalignment and offer a longer service time.	Double-row spherical roller bearings are appropriate for heavy radial loads. Double-row spherical roller bearings can also handle axial loads in any direction.  They can be used for medium speeds. These bearings have races that are spherical within the outer ring of the two rows. Thus, double-row spherical roller bearings self-align within wide boundaries and are able to accept minor deviations.
Split Spherical Roller Bearing	Sealed Spherical Roller Bearing
Split spherical roller bearings have 2 rows of identical rollers, an outer ring with a common sphere raceway and two inner raceways that are inclined towards the bearing’s direction. Split spherical roller bearings are able to handle heavy radial loads in combination with or without the axial load in both directions. The split spherical roller bearing design is ideal for difficult situations where mounting, dismounting and maintenance can be a problem.	Sealed Spherical roller bearings are distinguished by the use of seals at the outer edge on both ends of the bearing. They shield particles from entering the bearing as well as act as a barrier against oil that is released from the bearing. Sealed spherical roller bearings have been specifically designed to perform in extreme conditions and on equipment that requires longer maintenance intervals. Sealed spherical roller bearings are suitable for use in areas like continuous casting plant, conveyor belts, steel industry, paper making industry, mines and quarry, textile, elevator plant or the food industry.

Applications of Single-row Spherical Roller Bearings:

Single row spherical roller bearings are suitable for compensating angular misalignments where there is skewing between the outer and inner ring. As a result of the line contact between the rolling elements and raceways, they can support very high radial loads, even if shock-type loads occur. In contrast, axial load carrying capacity is low. Here are examples of applications in which spherical roller bearings might be used:​

- Metalworking

- Marine

- Industrial gearboxes

- mining machinery

- Chemistry

- Textile machinery

Spherical Roller Bearing Lubrication

As with all bearings, spherical roller bearings need to be adequately lubricated. This can be done through grease or oil. Keep in mind that grease has a lower operational speed capacity than oil. Should an operation require very high speeds, oil is a better choice.

If grease is the preferred choice, choose a bearing that is well suited for the lubrication type. Often, manufacturers build a grease groove into the outer raceway to make for easy application of grease through grease nipples.

If oil is the preferred choice, this can be done through a sealed bearing with an oil reservoir or oil-bath lubrication. Keep in mind that with an oil bath, the lowest roller only should be in contact with the oil. This will allow for splash lubrication. If more than the lowest roller is in contact with the oil, the bearing will need more force to bring the rollers through the oil, losing its effectiveness and speed advantage.

Mounted Spherical Roller Bearings

There are three main ways in which spherical rolling bearings are typically mounted.

Setscrew Mounted

With this method, the bearing is mounted with a collar and setscrews. As a rule, setscrew-mounted bearings are designed to support light loads to moderate loads, but not heavy loads. Screw sizes are determined by the expected loads if the screws are tightened to their total capacity. Choosing a screw size that is too big results in excessive ring bending. It is crucial to follow the manufacturers' recommendations regarding shaft fit and setscrew tightening to achieve the desired bearing performance, especially when operating under heavier loads or speeds.

Tapered Adapter Sleeve

Another option for mounting is the tapered adapter sleeve. Bearings are clamped to shafts with tapered sleeves. The tapered adapter compensates for shaft clearance when the locknut is tightened, but the mounting procedure requires more skill and care to ensure that the bearing adapter is tightened enough.

Direct Shaft Mounted Spherical Roller Bearings

Based on loading considerations and service life expectations, spherical roller bearings mounted directly on shafts may be slip-fit or press-fit. As with tapered sleeve mountings, the shaft and housing tolerances determine the resultant fit. The manufacturer's recommendations must be followed at all times.

Spherical Roller Bearings Manufacturers

We are a professional bearing exporter in China, producing many bearings in different sizes and sizes. We can provide you with excellent service in a wide range of bearings with world-class quality, such as deep groove ball bearings, spherical roller bearings, spherical ball/roller bearings, and cylindrical roller bearings, tapered roller bearings, angular contact Ball bearings, etc. Bearings can also provide OEM services according to customer requirements. We adhere to strict global standards, which is why we can provide you with a wide range of bearings of world-class quality. We have always adhered to the principle of “integrity-based, quality first, customer foremost.” We are ready to use our sincerity to serve every global customer for long-term and win-win cooperation.